import { defineStore } from 'pinia';
import { ref } from 'vue';
import { timesheetApprovalService } from 'src/modules/timesheet-approval/services/services-timesheet-approval';
import type { PayPeriod } from 'src/modules/shared/types/pay-period-interface';
import type { PayPeriodOverviewEmployee } from "src/modules/timesheet-approval/types/timesheet-approval-pay-period-overview-employee-interface";
import type { PayPeriodEmployeeDetails } from 'src/modules/timesheet-approval/types/timesheet-approval-pay-period-employee-details-interface';

const default_pay_period: PayPeriod = { 
    pay_period_no: -1,
    period_start: '',
    period_end: '',
    payday: '',
    pay_year: -1,
    label: ''
 };

export const useTimesheetStore = defineStore('timesheet', () => {
    const is_loading = ref<boolean>(false);
    const current_pay_period = ref<PayPeriod>(default_pay_period);
    const pay_period_overview_employees = ref<PayPeriodOverviewEmployee[]>([]);
    const pay_period_employee_details = ref<PayPeriodEmployeeDetails | undefined>();

    const getPayPeriodByDate = async (date_string: string): Promise<boolean> => {
        is_loading.value = true;

        try {
            const response = await timesheetApprovalService.getPayPeriodByDate(date_string);
            current_pay_period.value = response;
            is_loading.value = false;

            return true;
        } catch(error){
            console.error('Could not get current pay period: ', error );
            current_pay_period.value = default_pay_period;
            pay_period_overview_employees.value = [];
            //TODO: More in-depth error-handling here
        }

        is_loading.value = false;

        return false;
    };

    const getPayPeriodByYearAndPeriodNumber = async (year: number, period_number: number): Promise<boolean> => {
        is_loading.value = true;

        try {
            const response = await timesheetApprovalService.getPayPeriodByYearAndPeriodNumber(year, period_number);
            current_pay_period.value = response;
            is_loading.value = false;

            return true;
        } catch(error){
            console.error('Could not get current pay period: ', error );
            current_pay_period.value = default_pay_period;
            pay_period_overview_employees.value = [];
            //TODO: More in-depth error-handling here
        }

        is_loading.value = false;

        return false;
    };

    const getTimesheetApprovalPayPeriodEmployeeOverviews = async (pay_year: number, period_number: number, supervisor_email: string) => {
        is_loading.value = true;

        try {
            const response = await timesheetApprovalService.getPayPeriodEmployeeOverviews(
                pay_year, 
                period_number, 
                supervisor_email
            );
            pay_period_overview_employees.value = response.employees_overview;
        } catch (error) {
            console.error('There was an error retrieving Employee Pay Period overviews: ', error);
            pay_period_overview_employees.value = [];
            // TODO: More in-depth error-handling here
        }

        is_loading.value = false;
    };

    const getTimesheetsByPayPeriodAndEmail = async (employee_email: string) => {
        is_loading.value = true;

        try {
            const response = await timesheetApprovalService.getTimesheetsByPayPeriodAndEmail(
                current_pay_period.value.pay_year, 
                current_pay_period.value.pay_period_no, 
                employee_email
            );
            pay_period_employee_details.value = response;
        } catch (error) {
            console.error('There was an error retrieving timesheet details for this employee: ', error);
            pay_period_employee_details.value = MOCK_DATA_TIMESHEET_DETAILS;
            // TODO: More in-depth error-handling here
        }

        is_loading.value = false;
    }

    return { 
        current_pay_period, 
        pay_period_overview_employees,
        pay_period_employee_details,
        is_loading,
        getPayPeriodByDate,
        getPayPeriodByYearAndPeriodNumber,
        getTimesheetApprovalPayPeriodEmployeeOverviews,
        getTimesheetsByPayPeriodAndEmail,
    };
});

const MOCK_DATA_TIMESHEET_DETAILS = {
    is_approved: false,
    week1: {
        is_approved: true,
        shifts: {
            sun: [],
            mon: [ { is_approved: true, start: '08:00', end: '12:00' }, { is_approved: true, start: '13:00', end: '17:00' } ],
            tue: [ { is_approved: true, start: '08:00', end: '11:45' }, { is_approved: true, start: '12:45', end: '17:00' } ],
            wed: [ { is_approved: true, start: '08:00', end: '12:00' }, { is_approved: true, start: '13:00', end: '17:00' } ],
            thu: [ { is_approved: false, start: '13:00', end: '17:00' } ],
            fri: [ { is_approved: true, start: '08:00', end: '12:00' }, { is_approved: true, start: '13:00', end: '17:00' } ],
            sat: []
        },
        expenses: {
            sun: { costs: [], mileage: [] },
            mon: { costs: [ { is_approved: true, amount: 156.49 } ], mileage: [] },
            tue: { costs: [], mileage: [] },
            wed: { costs: [], mileage: [] },
            thu: { costs: [], mileage: [ { is_approved: false, amount: 16 } ] },
            fri: { costs: [], mileage: [] },
            sat: { costs: [], mileage: [] }
        }
    },
    week2: {
        is_approved: true,
        shifts: {
            sun: [],
            mon: [],
            tue: [],
            wed: [],
            thu: [],
            fri: [],
            sat: []
        },
        expenses: {
            sun: { costs: [], mileage: [] },
            mon: { costs: [], mileage: [] },
            tue: { costs: [], mileage: [] },
            wed: { costs: [], mileage: [] },
            thu: { costs: [], mileage: [] },
            fri: { costs: [], mileage: [] },
            sat: { costs: [], mileage: [] }
        }
    },
} as PayPeriodEmployeeDetails;