import { Injectable, NotFoundException } from "@nestjs/common";
import { Prisma, PrismaClient } from "@prisma/client";
import { weekStartSunday } from "src/time-and-attendance/utils/date-time.utils";
import { PrismaService } from "src/prisma/prisma.service";
import { EmailToIdResolver } from "./resolve-email-id.utils";
import { Result } from "src/common/errors/result-error.factory";


type Tx = Prisma.TransactionClient | PrismaClient;

@Injectable()
export class EmployeeTimesheetResolver {
    constructor(
        private readonly prisma: PrismaService,
        private readonly emailResolver: EmailToIdResolver,
    ) {}

    readonly findTimesheetIdByEmail = async (email: string, date: Date, client?: Tx): Promise<Result<{id: number}, string>> => {
        const db = client ?? this.prisma;
        const employee_id = await this.emailResolver.findIdByEmail(email);
        if(!employee_id.success) return { success: false, error: employee_id.error}
        const start_date = weekStartSunday(date);
        const timesheet = await db.timesheets.findFirst({
            where: { employee_id : employee_id.data, start_date: start_date },
            select: { id: true },
        });
        if(!timesheet) throw new NotFoundException(`timesheet not found`);
        return { success: true, data: {id: timesheet.id} };
    }
}