"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ShiftSeriesService = void 0;
const database_1 = require("../../../config/database");
const client_1 = require("@prisma/client");
const MAX_OCCURRENCES = 100;
const MAX_DAYS = 365;
class ShiftSeriesService {
    /**
     * Generate occurrence dates based on recurrence rules
     */
    static generateOccurrences(input) {
        const dates = [];
        const startDate = new Date(input.startDate);
        const endDate = input.endDate ? new Date(input.endDate) : null;
        let currentDate = new Date(startDate);
        let count = 0;
        while (count < MAX_OCCURRENCES) {
            // Check end date
            if (endDate && currentDate > endDate)
                break;
            // Check max days
            const daysDiff = Math.floor((currentDate.getTime() - startDate.getTime()) / (1000 * 60 * 60 * 24));
            if (daysDiff > MAX_DAYS)
                break;
            // Check if date matches recurrence pattern
            let shouldInclude = false;
            if (input.frequency === client_1.RecurrenceFrequency.DAILY) {
                shouldInclude = true;
            }
            else if (input.frequency === client_1.RecurrenceFrequency.WEEKLY) {
                const dayOfWeek = currentDate.getDay(); // 0=Sun, 6=Sat
                shouldInclude = input.daysOfWeek?.includes(dayOfWeek) ?? false;
            }
            else if (input.frequency === client_1.RecurrenceFrequency.MONTHLY) {
                shouldInclude = currentDate.getDate() === startDate.getDate();
            }
            if (shouldInclude) {
                dates.push(new Date(currentDate));
                count++;
            }
            // Increment date
            if (input.frequency === client_1.RecurrenceFrequency.DAILY) {
                currentDate.setDate(currentDate.getDate() + 1);
            }
            else if (input.frequency === client_1.RecurrenceFrequency.WEEKLY) {
                currentDate.setDate(currentDate.getDate() + 1); // Check each day
            }
            else if (input.frequency === client_1.RecurrenceFrequency.MONTHLY) {
                currentDate.setMonth(currentDate.getMonth() + 1);
            }
        }
        return dates;
    }
    /**
     * Create a shift series and generate all individual shifts
     */
    static async createSeries(input, createdBy) {
        // Generate occurrence dates
        const dates = this.generateOccurrences(input);
        if (dates.length === 0) {
            throw new Error('No valid dates generated from recurrence rules');
        }
        // Create series and shifts in transaction
        const result = await database_1.prisma.$transaction(async (tx) => {
            // Create series
            const series = await tx.shiftSeries.create({
                data: {
                    title: input.title,
                    description: input.description,
                    startTime: input.startTime,
                    endTime: input.endTime,
                    location: input.location,
                    maxVolunteers: input.maxVolunteers,
                    isPublic: input.isPublic ?? false,
                    cutId: input.cutId,
                    frequency: input.frequency,
                    daysOfWeek: input.daysOfWeek,
                    startDate: new Date(input.startDate),
                    endDate: input.endDate ? new Date(input.endDate) : null,
                    createdBy,
                },
            });
            // Create individual shifts
            const shifts = await Promise.all(dates.map((date) => tx.shift.create({
                data: {
                    title: input.title,
                    description: input.description,
                    date,
                    startTime: input.startTime,
                    endTime: input.endTime,
                    location: input.location,
                    maxVolunteers: input.maxVolunteers,
                    isPublic: input.isPublic ?? false,
                    cutId: input.cutId,
                    seriesId: series.id,
                    createdBy,
                },
            })));
            return { series, shifts };
        });
        return {
            series: result.series,
            generatedShiftsCount: result.shifts.length,
        };
    }
    /**
     * Get count of non-exception shifts in a series
     */
    static async getShiftCount(seriesId) {
        return database_1.prisma.shift.count({
            where: { seriesId, isException: false },
        });
    }
    /**
     * Get series with all its shifts
     */
    static async getSeries(seriesId) {
        const series = await database_1.prisma.shiftSeries.findUnique({
            where: { id: seriesId },
            include: {
                cut: true,
                shifts: {
                    orderBy: { date: 'asc' },
                    include: { signups: true },
                },
            },
        });
        if (!series) {
            throw new Error('Shift series not found');
        }
        return series;
    }
    /**
     * Update series shifts based on edit mode
     */
    static async updateSeries(seriesId, input) {
        const series = await database_1.prisma.shiftSeries.findUnique({
            where: { id: seriesId },
            include: { shifts: true },
        });
        if (!series) {
            throw new Error('Shift series not found');
        }
        const { editMode, fromDate, ...updates } = input;
        if (editMode === 'ALL') {
            // Update series + all shifts
            await database_1.prisma.$transaction(async (tx) => {
                await tx.shiftSeries.update({
                    where: { id: seriesId },
                    data: updates,
                });
                await tx.shift.updateMany({
                    where: { seriesId, isException: false },
                    data: updates,
                });
            });
        }
        else if (editMode === 'FUTURE' && fromDate) {
            // Update shifts from date onwards
            await database_1.prisma.shift.updateMany({
                where: {
                    seriesId,
                    date: { gte: new Date(fromDate) },
                    isException: false,
                },
                data: updates,
            });
        }
        // Note: THIS mode is handled by regular shift update with isException flag
        return this.getSeries(seriesId);
    }
    /**
     * Delete series (cascades to shifts via onDelete: SetNull)
     */
    static async deleteSeries(seriesId) {
        // Delete all shifts in series first
        await database_1.prisma.shift.deleteMany({
            where: { seriesId },
        });
        // Then delete series
        await database_1.prisma.shiftSeries.delete({
            where: { id: seriesId },
        });
    }
}
exports.ShiftSeriesService = ShiftSeriesService;
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