import { getMinutesFromTimeInString, getNumberOfWeekendDays } from '@seed/helpers/Utils.dates';
import { DateRangeComponent, SlotComponent } from '@seed/interfaces/components.dates';
import { DateTime } from 'luxon';

export interface StartToEndFormat {
    bookingDate: string;
    bookingStart: string;
    bookingEnd: string;
    bookingDurationInMinutes: number;
}

export interface SlotFormat {
    bookingStart: string;
    bookingEnd: string;
    bookingHourStart: string;
    bookingHourEnd: string;
    bookingDurationInMinutes: number;
}

export const formatStartToEnd = (input: DateRangeComponent, options?: { zone: string }): StartToEndFormat => {
    const zone = options?.zone || process.env.TIMEZONE || 'utc';

    const bookingStart = DateTime.fromJSDate(input.startDate, { zone });
    const bookingEnd = DateTime.fromJSDate(input.endDate, { zone });
    const durationObject = bookingEnd.diff(bookingStart, 'minutes').toObject();

    return {
        bookingDate: bookingStart.toFormat('dd/MM/yyyy'),
        bookingStart: bookingStart.toFormat('HH:mm'),
        bookingEnd: bookingEnd.toFormat('HH:mm'),
        bookingDurationInMinutes: durationObject.minutes || 0,
    };
};

export const formatSlot = (input: SlotComponent, options?: { zone: string; removeWeekend?: boolean }): SlotFormat => {
    const zone = options?.zone || process.env.TIMEZONE || 'utc';
    const removeWeekend = options?.removeWeekend || false;
    const { startDate, endDate, startTime, endTime } = input;

    const bookingStart = DateTime.fromJSDate(startDate, { zone });
    let bookingEnd = DateTime.fromJSDate(endDate, { zone });
    const numberOfDay = bookingEnd.diff(bookingStart, 'days').toObject();

    const startTimeInMin = getMinutesFromTimeInString(startTime);
    const endTimeInMin = getMinutesFromTimeInString(endTime);

    let daysToRemove = 0;
    if (removeWeekend) {
        daysToRemove = getNumberOfWeekendDays(bookingStart, bookingEnd);
    }

    const finalNumberOfDays = (numberOfDay.day || numberOfDay.days || 0) + 1 - daysToRemove;

    bookingEnd = bookingEnd.minus({ second: 1 });

    return {
        bookingStart: bookingStart.toFormat('dd/MM/yyyy'),
        bookingEnd: bookingEnd.toFormat('dd/MM/yyyy'),
        bookingHourStart: startTime,
        bookingHourEnd: endTime,
        bookingDurationInMinutes: finalNumberOfDays * (endTimeInMin - startTimeInMin),
    };
};