import { Injectable, NotFoundException } from "@nestjs/common";
import { TimesheetsCommandService } from "src/modules/timesheets/services/timesheets-command.service";
import { PrismaService } from "src/prisma/prisma.service";

@Injectable()
export class PayPeriodsCommandService {
    constructor(
        private readonly prisma: PrismaService,
        private readonly timesheetsApproval: TimesheetsCommandService,
    ) {}

    async approvalPayPeriod(year: number , periodNumber: number): Promise<void> {
        const period = await this.prisma.payPeriods.findUnique({
            where: { period_number: periodNumber },
        });
        if (!period) throw new NotFoundException(`PayPeriod #${periodNumber} not found`);

        //fetches timesheet of selected period if the timesheet as atleast 1 shift or 1 expense
        const timesheetList = await this.prisma.timesheets.findMany({
            where: {
                OR: [
                    { shift: {some: { date: { gte: period.start_date,
                                               lte: period.end_date,
                                             },
                            }},
                    },
                    { expense: { some: { date: { gte: period.start_date,
                                                 lte: period.end_date,
                                               },
                               }},
                    },
                ],
            },
        });

        //approval of both timesheet (cascading to the approval of related shifts and expenses)
        for(const timesheet of timesheetList) {
            await this.timesheetsApproval.updateApproval(timesheet.id, true);
        }
    }
}