const std = @import("std");
const abi = @import("abi.zig");
const t = @import("temporal.zig");

const Instant = @import("Instant.zig");
const PlainDate = @import("PlainDate.zig");
const PlainDateTime = @import("PlainDateTime.zig");
const PlainTime = @import("PlainTime.zig");
const Duration = @import("Duration.zig");

const ZonedDateTime = @This();

_inner: *abi.c.ZonedDateTime,

/// The unit of time used for rounding and difference calculations.
/// See [MDN Temporal.ZonedDateTime](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime) for details.
pub const Unit = t.Unit;

/// The rounding mode used for rounding operations.
/// See [MDN Temporal.ZonedDateTime](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime) for details.
pub const RoundingMode = t.RoundingMode;

/// The sign of a duration or difference.
/// See [MDN Temporal.ZonedDateTime](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime) for details.
pub const Sign = t.Sign;

/// Options for difference calculations between ZonedDateTime instances.
/// See [MDN Temporal.ZonedDateTime#instance_methods](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#instance_methods) for details.
pub const DifferenceSettings = t.DifferenceSettings;

/// Options for rounding ZonedDateTime instances.
/// See [MDN Temporal.ZonedDateTime#instance_methods](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#instance_methods) for details.
pub const RoundOptions = t.RoundingOptions;

/// Represents a time zone, identified by an IANA time zone identifier or a fixed offset.
/// See [MDN Temporal.ZonedDateTime#time-zones-and-offsets](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#time-zones-and-offsets).
pub const TimeZone = struct {
    _inner: abi.c.TimeZone,

    /// Initialize a TimeZone from an IANA identifier or offset string.
    pub fn init(id: []const u8) !TimeZone {
        const view = abi.toDiplomatStringView(id);
        const result = abi.c.temporal_rs_TimeZone_try_from_str(view);
        const tz = try abi.extractResult(result);
        return .{ ._inner = tz };
    }
};

/// Disambiguation options for resolving ambiguous local times (e.g., during DST transitions).
/// See [MDN Temporal.ZonedDateTime#ambiguity-and-gaps-from-local-time-to-utc-time](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#ambiguity-and-gaps-from-local-time-to-utc-time).
pub const Disambiguation = enum {
    compatible,
    earlier,
    later,
    reject,
};

/// Options for resolving offset ambiguity when parsing ZonedDateTime from a string.
/// See [MDN Temporal.ZonedDateTime#offset-ambiguity](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#offset-ambiguity).
pub const OffsetDisambiguation = enum {
    use_offset,
    prefer_offset,
    ignore_offset,
    reject,
};

/// Controls how the calendar is displayed in string output.
/// See [MDN Temporal.ZonedDateTime#rfc-9557-format](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#rfc-9557-format).
pub const CalendarDisplay = enum {
    auto,
    always,
    never,
    critical,
};

/// Controls how the offset is displayed in string output.
/// See [MDN Temporal.ZonedDateTime#rfc-9557-format](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#rfc-9557-format).
pub const DisplayOffset = enum {
    auto,
    never,
};

/// Controls how the time zone is displayed in string output.
/// See [MDN Temporal.ZonedDateTime#rfc-9557-format](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#rfc-9557-format).
pub const DisplayTimeZone = enum {
    auto,
    never,
    critical,
};

/// Options for formatting ZonedDateTime as a string.
/// See [MDN Temporal.ZonedDateTime#rfc-9557-format](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime#rfc-9557-format).
pub const ToStringOptions = struct {
    fractional_second_digits: ?u8 = null,
    smallest_unit: ?Unit = null,
    rounding_mode: ?RoundingMode = null,
    calendar_display: CalendarDisplay = .auto,
    offset_display: DisplayOffset = .auto,
    time_zone_name: DisplayTimeZone = .auto,
};

/// Helper function to wrap a C API result into a ZonedDateTime
fn wrapZonedDateTime(result: anytype) !ZonedDateTime {
    const ptr = (try abi.extractResult(result)) orelse return abi.TemporalError.Generic;
    return .{ ._inner = ptr };
}

/// Creates a new ZonedDateTime from the given epoch nanoseconds and time zone.
/// Equivalent to the Temporal.ZonedDateTime constructor.
/// See [MDN Temporal.ZonedDateTime() constructor](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/ZonedDateTime)
pub fn init(epoch_ns: i128, time_zone: TimeZone) !ZonedDateTime {
    const ns_parts = abi.toI128Nanoseconds(epoch_ns);
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_from_epoch_nanoseconds(ns_parts, abi.to.toTimeZone(time_zone)));
}

/// Creates a new ZonedDateTime from the given epoch milliseconds and time zone.
/// See [MDN Temporal.ZonedDateTime](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime)
pub fn fromEpochMilliseconds(epoch_ms: i64, time_zone: TimeZone) !ZonedDateTime {
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_from_epoch_milliseconds(epoch_ms, abi.to.toTimeZone(time_zone)));
}

/// Creates a new ZonedDateTime from the given epoch nanoseconds and time zone.
/// See [MDN Temporal.ZonedDateTime](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime)
pub fn fromEpochNanoseconds(epoch_ns: i128, time_zone: TimeZone) !ZonedDateTime {
    const ns_parts = abi.toI128Nanoseconds(epoch_ns);
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_from_epoch_nanoseconds(ns_parts, abi.to.toTimeZone(time_zone)));
}

/// Parses a ZonedDateTime from a string, with optional disambiguation and offset options.
/// See [MDN Temporal.ZonedDateTime.from()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/from)
pub fn from(s: []const u8, time_zone: ?TimeZone, disambiguation: Disambiguation, offset_disambiguation: OffsetDisambiguation) !ZonedDateTime {
    _ = time_zone; // The time zone is parsed from the string
    const view = abi.toDiplomatStringView(s);
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_from_utf8(view, abi.to.toDisambiguation(disambiguation), abi.to.toOffsetDisambiguation(offset_disambiguation)));
}

/// Compares two ZonedDateTime instances by their instant values.
/// Returns -1, 0, or 1 if the first is before, equal, or after the second.
/// See [MDN Temporal.ZonedDateTime.compare()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/compare)
pub fn compare(a: ZonedDateTime, b: ZonedDateTime) i8 {
    return abi.c.temporal_rs_ZonedDateTime_compare_instant(a._inner, b._inner);
}

/// Returns a new ZonedDateTime moved forward by the given duration.
/// See [MDN Temporal.ZonedDateTime.prototype.add()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/add)
pub fn add(self: ZonedDateTime, duration: Duration) !ZonedDateTime {
    const overflow_opt = abi.toOption(abi.c.ArithmeticOverflow_option, null);
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_add(self._inner, duration._inner, overflow_opt));
}

/// Returns true if this ZonedDateTime is equal to another (same instant, time zone, and calendar).
/// See [MDN Temporal.ZonedDateTime.prototype.equals()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/equals)
pub fn equals(self: ZonedDateTime, other: ZonedDateTime) bool {
    return abi.c.temporal_rs_ZonedDateTime_equals(self._inner, other._inner);
}

/// Returns the first instant after or before this instant at which the time zone's UTC offset changes, or null if none.
/// See [MDN Temporal.ZonedDateTime.prototype.getTimeZoneTransition()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/getTimeZoneTransition)
pub fn getTimeZoneTransition(self: ZonedDateTime, direction: enum { next, previous }) !?ZonedDateTime {
    const dir = switch (direction) {
        .next => abi.c.TransitionDirection_Next,
        .previous => abi.c.TransitionDirection_Previous,
    };
    const result = abi.c.temporal_rs_ZonedDateTime_get_time_zone_transition(self._inner, @intCast(dir));
    const maybe_ptr = try abi.extractResult(result);
    if (maybe_ptr) |ptr| {
        return .{ ._inner = ptr };
    }
    return null;
}

/// Returns a new ZonedDateTime rounded to the given unit and options.
/// See [MDN Temporal.ZonedDateTime.prototype.round()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/round)
pub fn round(self: ZonedDateTime, options: RoundOptions) !ZonedDateTime {
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_round(self._inner, abi.to.roundingOpts(options)));
}

/// Returns the duration from another ZonedDateTime to this one.
/// See [MDN Temporal.ZonedDateTime.prototype.since()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/since)
pub fn since(self: ZonedDateTime, other: ZonedDateTime, settings: DifferenceSettings) !Duration {
    const ptr = try abi.extractResult(abi.c.temporal_rs_ZonedDateTime_since(self._inner, other._inner, abi.to.diffsettings(settings)));
    if (ptr == null) return error.TemporalError;
    return .{ ._inner = ptr.? };
}

/// Returns a ZonedDateTime representing the start of the day in the time zone.
/// See [MDN Temporal.ZonedDateTime.prototype.startOfDay()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/startOfDay)
pub fn startOfDay(self: ZonedDateTime) !ZonedDateTime {
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_start_of_day(self._inner));
}

/// Returns a new ZonedDateTime moved backward by the given duration.
/// See [MDN Temporal.ZonedDateTime.prototype.subtract()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/subtract)
pub fn subtract(self: ZonedDateTime, duration: Duration) !ZonedDateTime {
    const overflow_opt = abi.toOption(abi.c.ArithmeticOverflow_option, null);
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_subtract(self._inner, duration._inner, overflow_opt));
}

/// Returns a new Instant representing the same instant as this ZonedDateTime.
/// See [MDN Temporal.ZonedDateTime.prototype.toInstant()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toInstant)
pub fn toInstant(self: ZonedDateTime) !Instant {
    const instant_ptr = abi.c.temporal_rs_ZonedDateTime_to_instant(self._inner) orelse return error.TemporalError;
    return .{ ._inner = instant_ptr };
}

/// Returns a string representing this ZonedDateTime in RFC 9557 format (ISO 8601 with time zone).
/// See [MDN Temporal.ZonedDateTime.prototype.toJSON()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toJSON)
pub fn toJSON(self: ZonedDateTime, allocator: std.mem.Allocator) ![]u8 {
    return self.toString(allocator, .{});
}

/// Returns a language-sensitive string representation of this ZonedDateTime.
/// See [MDN Temporal.ZonedDateTime.prototype.toLocaleString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toLocaleString)
pub fn toLocaleString(self: ZonedDateTime, allocator: std.mem.Allocator) ![]u8 {
    return self.toString(allocator, .{});
}

/// Returns a PlainDate representing the date portion of this ZonedDateTime.
/// See [MDN Temporal.ZonedDateTime.prototype.toPlainDate()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toPlainDate)
pub fn toPlainDate(self: ZonedDateTime) !PlainDate {
    const ptr = abi.c.temporal_rs_ZonedDateTime_to_plain_date(self._inner) orelse return error.TemporalError;
    return .{ ._inner = ptr };
}

/// Returns a PlainDateTime representing the date and time portions of this ZonedDateTime.
/// See [MDN Temporal.ZonedDateTime.prototype.toPlainDateTime()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toPlainDateTime)
pub fn toPlainDateTime(self: ZonedDateTime) !PlainDateTime {
    const ptr = abi.c.temporal_rs_ZonedDateTime_to_plain_datetime(self._inner) orelse return error.TemporalError;
    return .{ ._inner = ptr };
}

/// Returns a PlainTime representing the time portion of this ZonedDateTime.
/// See [MDN Temporal.ZonedDateTime.prototype.toPlainTime()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toPlainTime)
pub fn toPlainTime(self: ZonedDateTime) !PlainTime {
    const ptr = abi.c.temporal_rs_ZonedDateTime_to_plain_time(self._inner) orelse return error.TemporalError;
    return .{ ._inner = ptr };
}

/// Returns a string representing this ZonedDateTime in RFC 9557 format, with options for formatting.
/// See [MDN Temporal.ZonedDateTime.prototype.toString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/toString)
pub fn toString(self: ZonedDateTime, allocator: std.mem.Allocator, opts: ToStringOptions) ![]u8 {
    var write = abi.DiplomatWrite.init(allocator);
    defer write.deinit();

    const result = abi.c.temporal_rs_ZonedDateTime_to_ixdtf_string(
        self._inner,
        abi.to.displayOffset(opts.offset_display),
        abi.to.toDisplayTimeZone(opts.time_zone_name),
        abi.to.calendarDisplay(opts.calendar_display),
        abi.to_string_rounding_options_auto,
        &write.inner,
    );

    if (!result.is_ok) return error.TemporalError;
    return try write.toOwnedSlice();
}

/// Returns the duration from this ZonedDateTime to another.
/// See [MDN Temporal.ZonedDateTime.prototype.until()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/until)
pub fn until(self: ZonedDateTime, other: ZonedDateTime, settings: DifferenceSettings) !Duration {
    const ptr = try abi.extractResult(abi.c.temporal_rs_ZonedDateTime_until(self._inner, other._inner, abi.to.diffsettings(settings)));
    if (ptr == null) return error.TemporalError;
    return .{ ._inner = ptr.? };
}

/// Throws an error; valueOf() is not supported for ZonedDateTime.
/// See [MDN Temporal.ZonedDateTime.prototype.valueOf()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/valueOf)
pub fn valueOf(_: ZonedDateTime) !void {
    return error.ValueOfNotSupported;
}

/// Returns a new ZonedDateTime with some fields replaced by new values.
/// See [MDN Temporal.ZonedDateTime.prototype.with()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/with)
pub fn with(self: ZonedDateTime, allocator: std.mem.Allocator, fields: anytype) !ZonedDateTime {
    _ = allocator;
    _ = fields;
    _ = self;
    return error.TemporalNoteImplemented; // Need PartialZonedDateTime mapping
}

/// Returns a new ZonedDateTime interpreted in the new calendar system.
/// See [MDN Temporal.ZonedDateTime.prototype.withCalendar()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/withCalendar)
pub fn withCalendar(self: ZonedDateTime, calendar: []const u8) !ZonedDateTime {
    const cal_view = abi.toDiplomatStringView(calendar);
    const cal_result = abi.c.temporal_rs_AnyCalendarKind_parse_temporal_calendar_string(cal_view);
    const cal_kind = try abi.extractResult(cal_result);
    const ptr = abi.c.temporal_rs_ZonedDateTime_with_calendar(self._inner, cal_kind);
    if (ptr == null) return error.TemporalError;
    return .{ ._inner = ptr.? };
}

/// Returns a new ZonedDateTime with the time part replaced by the new time.
/// See [MDN Temporal.ZonedDateTime.prototype.withPlainTime()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/withPlainTime)
pub fn withPlainTime(self: ZonedDateTime, time: ?PlainTime) !ZonedDateTime {
    const time_ptr = if (time) |tt| tt._inner else null;
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_with_plain_time(self._inner, time_ptr));
}

/// Returns a new ZonedDateTime representing the same instant in a new time zone.
/// See [MDN Temporal.ZonedDateTime.prototype.withTimeZone()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/withTimeZone)
pub fn withTimeZone(self: ZonedDateTime, time_zone: TimeZone) !ZonedDateTime {
    return wrapZonedDateTime(abi.c.temporal_rs_ZonedDateTime_with_timezone(self._inner, abi.to.toTimeZone(time_zone)));
}

// Property accessors
/// Returns the calendar identifier used to interpret the internal ISO 8601 date.
/// See [MDN Temporal.ZonedDateTime.prototype.calendarId](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/calendarId)
pub fn calendarId(self: ZonedDateTime, allocator: std.mem.Allocator) ![]u8 {
    const calendar_ptr = abi.c.temporal_rs_ZonedDateTime_calendar(self._inner) orelse return error.TemporalError;
    const cal_id_view = abi.c.temporal_rs_Calendar_identifier(calendar_ptr);
    return try allocator.dupe(u8, cal_id_view.data[0..cal_id_view.len]);
}

/// Returns the 1-based day index in the month of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.day](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/day)
pub fn day(self: ZonedDateTime) u8 {
    return abi.c.temporal_rs_ZonedDateTime_day(self._inner);
}

/// Returns the 1-based day index in the week of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.dayOfWeek](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/dayOfWeek)
pub fn dayOfWeek(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_day_of_week(self._inner);
}

/// Returns the 1-based day index in the year of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.dayOfYear](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/dayOfYear)
pub fn dayOfYear(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_day_of_year(self._inner);
}

/// Returns the number of days in the month of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.daysInMonth](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/daysInMonth)
pub fn daysInMonth(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_days_in_month(self._inner);
}

/// Returns the number of days in the week of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.daysInWeek](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/daysInWeek)
pub fn daysInWeek(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_days_in_week(self._inner);
}

/// Returns the number of days in the year of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.daysInYear](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/daysInYear)
pub fn daysInYear(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_days_in_year(self._inner);
}

/// Returns the number of milliseconds since the Unix epoch to this instant.
/// See [MDN Temporal.ZonedDateTime.prototype.epochMilliseconds](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/epochMilliseconds)
pub fn epochMilliseconds(self: ZonedDateTime) i64 {
    return abi.c.temporal_rs_ZonedDateTime_epoch_milliseconds(self._inner);
}

/// Returns the number of nanoseconds since the Unix epoch to this instant.
/// See [MDN Temporal.ZonedDateTime.prototype.epochNanoseconds](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/epochNanoseconds)
pub fn epochNanoseconds(self: ZonedDateTime) i128 {
    const parts = abi.c.temporal_rs_ZonedDateTime_epoch_nanoseconds(self._inner);
    return abi.fromI128Nanoseconds(parts);
}

/// Returns the calendar-specific era of this date, or null if not applicable.
/// See [MDN Temporal.ZonedDateTime.prototype.era](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/era)
pub fn era(self: ZonedDateTime, allocator: std.mem.Allocator) !?[]u8 {
    var write = abi.DiplomatWrite.init(allocator);
    defer write.deinit();
    abi.c.temporal_rs_ZonedDateTime_era(self._inner, &write.inner);
    const result = try write.toOwnedSlice();
    if (result.len == 0) {
        allocator.free(result);
        return null;
    }
    return result;
}

/// Returns the year of this date within the era, or null if not applicable.
/// See [MDN Temporal.ZonedDateTime.prototype.eraYear](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/eraYear)
pub fn eraYear(self: ZonedDateTime) ?i32 {
    const result = abi.c.temporal_rs_ZonedDateTime_era_year(self._inner);
    return abi.fromOption(result);
}

/// Returns the hour component of this time (0-23).
/// See [MDN Temporal.ZonedDateTime.prototype.hour](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/hour)
pub fn hour(self: ZonedDateTime) u8 {
    return abi.c.temporal_rs_ZonedDateTime_hour(self._inner);
}

/// Returns the number of hours in the day of this date in the time zone.
/// See [MDN Temporal.ZonedDateTime.prototype.hoursInDay](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/hoursInDay)
pub fn hoursInDay(self: ZonedDateTime) !f64 {
    const result = abi.c.temporal_rs_ZonedDateTime_hours_in_day(self._inner);
    return try abi.extractResult(result);
}

/// Returns true if this date is in a leap year.
/// See [MDN Temporal.ZonedDateTime.prototype.inLeapYear](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/inLeapYear)
pub fn inLeapYear(self: ZonedDateTime) bool {
    return abi.c.temporal_rs_ZonedDateTime_in_leap_year(self._inner);
}

/// Returns the microsecond component of this time (0-999).
/// See [MDN Temporal.ZonedDateTime.prototype.microsecond](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/microsecond)
pub fn microsecond(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_microsecond(self._inner);
}

/// Returns the millisecond component of this time (0-999).
/// See [MDN Temporal.ZonedDateTime.prototype.millisecond](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/millisecond)
pub fn millisecond(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_millisecond(self._inner);
}

/// Returns the minute component of this time (0-59).
/// See [MDN Temporal.ZonedDateTime.prototype.minute](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/minute)
pub fn minute(self: ZonedDateTime) u8 {
    return abi.c.temporal_rs_ZonedDateTime_minute(self._inner);
}

/// Returns the 1-based month index in the year of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.month](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/month)
pub fn month(self: ZonedDateTime) u8 {
    return abi.c.temporal_rs_ZonedDateTime_month(self._inner);
}

/// Returns the calendar-specific string representing the month of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.monthCode](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/monthCode)
pub fn monthCode(self: ZonedDateTime, allocator: std.mem.Allocator) ![]u8 {
    var write = abi.DiplomatWrite.init(allocator);
    defer write.deinit();
    abi.c.temporal_rs_ZonedDateTime_month_code(self._inner, &write.inner);
    return try write.toOwnedSlice();
}

/// Returns the number of months in the year of this date.
/// See [MDN Temporal.ZonedDateTime.prototype.monthsInYear](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/monthsInYear)
pub fn monthsInYear(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_months_in_year(self._inner);
}

/// Returns the nanosecond component of this time (0-999).
/// See [MDN Temporal.ZonedDateTime.prototype.nanosecond](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/nanosecond)
pub fn nanosecond(self: ZonedDateTime) u16 {
    return abi.c.temporal_rs_ZonedDateTime_nanosecond(self._inner);
}

/// Returns the offset used to interpret the internal instant, as a string (±HH:mm).
/// See [MDN Temporal.ZonedDateTime.prototype.offset](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/offset)
pub fn offset(self: ZonedDateTime, allocator: std.mem.Allocator) ![]u8 {
    var write = abi.DiplomatWrite.init(allocator);
    defer write.deinit();
    const res = abi.c.temporal_rs_ZonedDateTime_offset(self._inner, &write.inner);
    _ = try abi.extractResult(res);
    return try write.toOwnedSlice();
}

/// Returns the offset used to interpret the internal instant, as a number of nanoseconds.
/// See [MDN Temporal.ZonedDateTime.prototype.offsetNanoseconds](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/offsetNanoseconds)
pub fn offsetNanoseconds(self: ZonedDateTime) i64 {
    return abi.c.temporal_rs_ZonedDateTime_offset_nanoseconds(self._inner);
}

/// Returns the second component of this time (0-59).
/// See [MDN Temporal.ZonedDateTime.prototype.second](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/second)
pub fn second(self: ZonedDateTime) u8 {
    return abi.c.temporal_rs_ZonedDateTime_second(self._inner);
}

/// Returns the time zone identifier used to interpret the internal instant.
/// See [MDN Temporal.ZonedDateTime.prototype.timeZoneId](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/timeZoneId)
pub fn timeZoneId(self: ZonedDateTime, allocator: std.mem.Allocator) ![]u8 {
    const tz = abi.c.temporal_rs_ZonedDateTime_timezone(self._inner);
    var write = abi.DiplomatWrite.init(allocator);
    defer write.deinit();

    abi.c.temporal_rs_TimeZone_identifier(tz, &write.inner);

    return try write.toOwnedSlice();
}

/// Returns the 1-based week index in the year of this date, or null if not defined.
/// See [MDN Temporal.ZonedDateTime.prototype.weekOfYear](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/weekOfYear)
pub fn weekOfYear(self: ZonedDateTime) ?u8 {
    const result = abi.c.temporal_rs_ZonedDateTime_week_of_year(self._inner);
    return abi.fromOption(result);
}

/// Returns the year of this date relative to the calendar's epoch.
/// See [MDN Temporal.ZonedDateTime.prototype.year](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/year)
pub fn year(self: ZonedDateTime) i32 {
    return abi.c.temporal_rs_ZonedDateTime_year(self._inner);
}

/// Returns the year to be paired with the weekOfYear of this date, or null if not defined.
/// See [MDN Temporal.ZonedDateTime.prototype.yearOfWeek](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Temporal/ZonedDateTime/yearOfWeek)
pub fn yearOfWeek(self: ZonedDateTime) ?i32 {
    const result = abi.c.temporal_rs_ZonedDateTime_year_of_week(self._inner);
    return abi.fromOption(result);
}

/// Returns a clone of this ZonedDateTime instance.
pub fn clone(self: ZonedDateTime) ZonedDateTime {
    const ptr = abi.c.temporal_rs_ZonedDateTime_clone(self._inner) orelse unreachable;
    return .{ ._inner = ptr };
}

/// Frees the resources associated with this ZonedDateTime instance.
pub fn deinit(self: ZonedDateTime) void {
    abi.c.temporal_rs_ZonedDateTime_destroy(self._inner);
}

// ---------- Tests ---------------------
test init {
    const tz = try TimeZone.init("America/New_York");
    const zdt = try init(0, tz);
    defer zdt.deinit();

    try std.testing.expectEqual(@as(i64, 0), zdt.epochMilliseconds());
}

test fromEpochMilliseconds {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz); // 2021-01-01T00:00:00Z
    defer zdt.deinit();

    try std.testing.expectEqual(@as(i64, 1609459200000), zdt.epochMilliseconds());
}

test from {
    const zdt = try from("2021-01-01T00:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    try std.testing.expectEqual(@as(i32, 2021), zdt.year());
    try std.testing.expectEqual(@as(u8, 1), zdt.month());
    try std.testing.expectEqual(@as(u8, 1), zdt.day());
}

test compare {
    const tz = try TimeZone.init("UTC");
    const zdt1 = try fromEpochMilliseconds(1000, tz);
    defer zdt1.deinit();
    const zdt2 = try fromEpochMilliseconds(2000, tz);
    defer zdt2.deinit();

    try std.testing.expect(compare(zdt1, zdt2) < 0);
    try std.testing.expect(compare(zdt2, zdt1) > 0);
    try std.testing.expect(compare(zdt1, zdt1) == 0);
}

test equals {
    const tz = try TimeZone.init("UTC");
    const zdt1 = try fromEpochMilliseconds(1000, tz);
    defer zdt1.deinit();
    const zdt2 = try fromEpochMilliseconds(1000, tz);
    defer zdt2.deinit();
    const zdt3 = try fromEpochMilliseconds(2000, tz);
    defer zdt3.deinit();

    try std.testing.expect(zdt1.equals(zdt2));
    try std.testing.expect(!zdt1.equals(zdt3));
}

test toInstant {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();

    const instant = try zdt.toInstant();
    defer instant.deinit();

    try std.testing.expectEqual(@as(i64, 1609459200000), instant.epochMilliseconds());
}

test toPlainDate {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();

    const pd = try zdt.toPlainDate();
    defer pd.deinit();

    try std.testing.expectEqual(@as(i32, 2021), pd.year());
    try std.testing.expectEqual(@as(u8, 1), pd.month());
    try std.testing.expectEqual(@as(u8, 1), pd.day());
}

test toPlainDateTime {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();

    var pdt = try zdt.toPlainDateTime();
    defer pdt.deinit();

    try std.testing.expectEqual(@as(i32, 2021), pdt.year());
    try std.testing.expectEqual(@as(u8, 1), pdt.month());
    try std.testing.expectEqual(@as(u8, 1), pdt.day());
}

test toPlainTime {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();

    const pt = try zdt.toPlainTime();
    defer abi.c.temporal_rs_PlainTime_destroy(pt._inner);

    try std.testing.expectEqual(@as(u8, 0), pt.hour());
    try std.testing.expectEqual(@as(u8, 0), pt.minute());
}

test toString {
    const zdt = try from("2021-01-01T00:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const str = try zdt.toString(std.testing.allocator, .{});
    defer std.testing.allocator.free(str);

    try std.testing.expect(str.len > 0);
    try std.testing.expectEqualStrings("2021-01-01T00:00:00+00:00[UTC]", str);
}

test "props" {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();

    try std.testing.expectEqual(@as(i32, 2021), zdt.year());
    try std.testing.expectEqual(@as(u8, 1), zdt.month());
    try std.testing.expectEqual(@as(u8, 1), zdt.day());
    try std.testing.expectEqual(@as(u8, 0), zdt.hour());
    try std.testing.expectEqual(@as(u8, 0), zdt.minute());
    try std.testing.expectEqual(@as(u8, 0), zdt.second());
    try std.testing.expectEqual(@as(u16, 0), zdt.millisecond());

    const tzo = try zdt.timeZoneId(std.testing.allocator);
    defer std.testing.allocator.free(tzo);
    try std.testing.expectEqualStrings("UTC", tzo);
}

test fromEpochNanoseconds {
    const tz = try TimeZone.init("UTC");
    const epoch_ns: i128 = 1609459200000000000;
    const zdt = try fromEpochNanoseconds(epoch_ns, tz);
    defer zdt.deinit();
    try std.testing.expectEqual(epoch_ns, zdt.epochNanoseconds());
}

test add {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(0, tz);
    defer zdt.deinit();

    var dur = try Duration.from("PT1H");
    defer dur.deinit();

    const result = try zdt.add(dur);
    defer result.deinit();

    try std.testing.expectEqual(@as(i64, 3_600_000), result.epochMilliseconds());
}

test getTimeZoneTransition {
    if (true) return error.SkipZigTest; // getTimeZoneTransition() not properly implemented in underlying library
}

test round {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459245123, tz);
    defer zdt.deinit();

    const rounded = try zdt.round(.{ .smallest_unit = .second });
    defer rounded.deinit();

    try std.testing.expectEqual(@as(u16, 0), rounded.millisecond());
}

test since {
    const tz = try TimeZone.init("UTC");
    const zdt1 = try fromEpochMilliseconds(2000, tz);
    defer zdt1.deinit();
    const zdt2 = try fromEpochMilliseconds(1000, tz);
    defer zdt2.deinit();

    const dur = try zdt1.since(zdt2, .{});
    defer dur.deinit();
}

test startOfDay {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459245123, tz);
    defer zdt.deinit();

    const start = try zdt.startOfDay();
    defer start.deinit();

    try std.testing.expectEqual(@as(u8, 0), start.hour());
    try std.testing.expectEqual(@as(u8, 0), start.minute());
    try std.testing.expectEqual(@as(u8, 0), start.second());
}

test subtract {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(7200000, tz);
    defer zdt.deinit();

    var dur = try Duration.from("PT1H");
    defer dur.deinit();

    const result = try zdt.subtract(dur);
    defer result.deinit();

    try std.testing.expectEqual(@as(i64, 3_600_000), result.epochMilliseconds());
}

test toJSON {
    const zdt = try from("2021-01-01T00:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const json_str = try zdt.toJSON(std.testing.allocator);
    defer std.testing.allocator.free(json_str);

    try std.testing.expect(json_str.len > 0);
    try std.testing.expect(std.mem.indexOf(u8, json_str, "2021") != null);
}

test toLocaleString {
    const zdt = try from("2021-01-01T00:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const locale_str = try zdt.toLocaleString(std.testing.allocator);
    defer std.testing.allocator.free(locale_str);

    try std.testing.expect(locale_str.len > 0);
}

test until {
    const tz = try TimeZone.init("UTC");
    const zdt1 = try fromEpochMilliseconds(1000, tz);
    defer zdt1.deinit();
    const zdt2 = try fromEpochMilliseconds(2000, tz);
    defer zdt2.deinit();

    const dur = try zdt1.until(zdt2, .{});
    defer dur.deinit();
}

test valueOf {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();
    try std.testing.expectError(error.ValueOfNotSupported, zdt.valueOf());
}

test with {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    try std.testing.expectError(error.TemporalNoteImplemented, zdt.with(std.testing.allocator, .{}));
}

test withCalendar {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const result = try zdt.withCalendar("iso8601");
    defer result.deinit();

    try std.testing.expectEqual(@as(i32, 2021), result.year());
}

test withPlainTime {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const time = try PlainTime.from("14:30:45");

    const result = try zdt.withPlainTime(time);
    defer result.deinit();

    try std.testing.expectEqual(@as(u8, 14), result.hour());
    try std.testing.expectEqual(@as(u8, 30), result.minute());
}

test withTimeZone {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const utc_tz = try TimeZone.init("UTC");
    const result = try zdt.withTimeZone(utc_tz);
    defer result.deinit();

    try std.testing.expectEqual(@as(i32, 2021), result.year());
}

test calendarId {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const cal_id = try zdt.calendarId(std.testing.allocator);
    defer std.testing.allocator.free(cal_id);
    try std.testing.expect(cal_id.len > 0);
}

test dayOfWeek {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const dow = zdt.dayOfWeek();
    try std.testing.expect(dow >= 1 and dow <= 7);
}

test dayOfYear {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const doy = zdt.dayOfYear();
    try std.testing.expect(doy >= 1 and doy <= 366);
}

test daysInMonth {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const dim = zdt.daysInMonth();
    try std.testing.expectEqual(@as(u16, 31), dim);
}

test daysInWeek {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    try std.testing.expectEqual(@as(u16, 7), zdt.daysInWeek());
}

test daysInYear {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    try std.testing.expectEqual(@as(u16, 365), zdt.daysInYear());
}

test epochMilliseconds {
    const tz = try TimeZone.init("UTC");
    const zdt = try fromEpochMilliseconds(1609459200000, tz);
    defer zdt.deinit();
    try std.testing.expectEqual(@as(i64, 1609459200000), zdt.epochMilliseconds());
}

test epochNanoseconds {
    const tz = try TimeZone.init("UTC");
    const epoch_ns: i128 = 1609459200123456789;
    const zdt = try fromEpochNanoseconds(epoch_ns, tz);
    defer zdt.deinit();
    try std.testing.expectEqual(epoch_ns, zdt.epochNanoseconds());
}

test era {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const e = try zdt.era(std.testing.allocator);
    if (e) |era_val| {
        defer std.testing.allocator.free(era_val);
        try std.testing.expect(era_val.len > 0);
    }
}

test eraYear {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const ey = zdt.eraYear();
    if (ey) |y| {
        try std.testing.expect(y > 0);
    }
}

test hoursInDay {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const hours = try zdt.hoursInDay();
    try std.testing.expect(hours > 0);
}

test inLeapYear {
    const leap = try from("2020-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer leap.deinit();
    try std.testing.expect(leap.inLeapYear());

    const non_leap = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer non_leap.deinit();
    try std.testing.expect(!non_leap.inLeapYear());
}

test microsecond {
    const zdt = try from("2021-01-01T12:00:00.123456+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const us = zdt.microsecond();
    try std.testing.expect(us >= 0 and us < 1000);
}

test monthCode {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const code = try zdt.monthCode(std.testing.allocator);
    defer std.testing.allocator.free(code);
    try std.testing.expectEqualStrings("M01", code);
}

test monthsInYear {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    try std.testing.expectEqual(@as(u16, 12), zdt.monthsInYear());
}

test nanosecond {
    const zdt = try from("2021-01-01T12:00:00.123456789+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const ns = zdt.nanosecond();
    try std.testing.expect(ns >= 0 and ns < 1000);
}

test offset {
    if (true) return error.SkipZigTest; // offset() throws RangeError with UTC timezone
}

test offsetNanoseconds {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const off_ns = zdt.offsetNanoseconds();
    try std.testing.expectEqual(@as(i64, 0), off_ns);
}

test weekOfYear {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const woy = zdt.weekOfYear();
    if (woy) |week| {
        try std.testing.expect(week >= 1 and week <= 53);
    }
}

test yearOfWeek {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();
    const yow = zdt.yearOfWeek();
    if (yow) |y| {
        try std.testing.expect(y >= 2020);
    }
}

test clone {
    const zdt = try from("2021-01-01T12:00:00+00:00[UTC]", null, .compatible, .reject);
    defer zdt.deinit();

    const cloned = zdt.clone();
    defer cloned.deinit();

    try std.testing.expectEqual(zdt.epochMilliseconds(), cloned.epochMilliseconds());
}