import { date } from 'quasar';
import { defineStore } from 'pinia';
import { computed, ref } from 'vue';
import { withLoading } from 'src/utils/store-helpers';
import { timesheetApprovalService } from 'src/modules/timesheet-approval/services/timesheet-approval-service';
import { timesheetTempService } from 'src/modules/timesheets/services/timesheet-services';
import { default_pay_period_employee_details, type PayPeriodEmployeeDetails } from 'src/modules/timesheet-approval/types/pay-period-employee-details';
import { default_pay_period_employee_overview, type PayPeriodEmployeeOverview } from "src/modules/timesheet-approval/types/pay-period-employee-overview";
import type { Timesheet } from 'src/modules/timesheets/types/timesheet.interfaces';
import type { PayPeriod } from 'src/modules/shared/types/pay-period-interface';
import type { PayPeriodReportFilters } from 'src/modules/timesheet-approval/types/pay-period-report';

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

 //employee timesheet
 const default_timesheet: Timesheet = {
    start_day: '',
    end_day: '',
    label: '',
    is_approved: false,
    shifts: [],
    expenses: [],
 };

export const useTimesheetStore = defineStore('timesheet', () => {
    const is_loading = ref<boolean>(false);
    const pay_period = ref<PayPeriod>(default_pay_period);
    const pay_period_employee_overview_list = ref<PayPeriodEmployeeOverview[]>([]);
    const pay_period_employee_overview = ref<PayPeriodEmployeeOverview>(default_pay_period_employee_overview);
    const pay_period_employee_details = ref<PayPeriodEmployeeDetails>(default_pay_period_employee_details);
    const pay_period_report = ref();
    const timesheet = ref<Timesheet>(default_timesheet);
    const is_calendar_limit = computed( ()=> 
        pay_period.value.pay_year === 2024 &&
        pay_period.value.pay_period_no <= 1
    );

    const getPayPeriodByDateOrYearAndNumber = (date_or_year: string | number, period_number?: number): Promise<boolean> => {
        return withLoading( is_loading, async () => {
            try {
                let response;

                if (typeof date_or_year === 'string') {
                    response = await timesheetApprovalService.getPayPeriodByDate(date_or_year);  
                    return true;
                }
                else if ( typeof date_or_year === 'number' && period_number ) {
                    response = await timesheetApprovalService.getPayPeriodByYearAndPeriodNumber(date_or_year, period_number);
                    return true;
                }
                else response = default_pay_period;

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

            return false;
        });
    };

    const getPayPeriodEmployeeOverviewListBySupervisorEmail = async (pay_year: number, period_number: number, supervisor_email: string): Promise<boolean> => {
        return withLoading( is_loading, async () => {
            try {
                const response = await timesheetApprovalService.getPayPeriodEmployeeOverviewListBySupervisorEmail( pay_year,  period_number, supervisor_email );
                pay_period_employee_overview_list.value = response.employees_overview;
                return true;
            } catch (error) {
                console.error('There was an error retrieving Employee Pay Period overviews: ', error);
                pay_period_employee_overview_list.value = [];
                // TODO: More in-depth error-handling here
            }

            return false;
        });
    };

    const getPayPeriodOverviewByEmployeeEmail = (email: string): PayPeriodEmployeeOverview => {
        const response = pay_period_employee_overview_list.value?.find( employee_overview => employee_overview.email === email);
        if (typeof response === 'undefined') {
            pay_period_employee_overview.value = default_pay_period_employee_overview;
        } else {
            pay_period_employee_overview.value = response;
        }
        
        return pay_period_employee_overview.value;
    };

    const getTimesheetByEmail = async (employee_email: string) => {
        return withLoading( is_loading, async () => {
            try{
                const response = await timesheetTempService.getTimesheetsByEmail(employee_email);
                timesheet.value = response;

                return true;
            }catch (error) {
                console.error('There was an error retrieving timesheet details for this employee: ', error);
                timesheet.value = { ...default_timesheet }
            }

            return false;
        });
    };

    const getPayPeriodEmployeeDetailsByEmployeeEmail = async (employee_email: string) => {
        return withLoading( is_loading, async () => {
            try {
                const response = await timesheetApprovalService.getPayPeriodEmployeeDetailsByPayPeriodAndEmail(
                    pay_period.value.pay_year, 
                    pay_period.value.pay_period_no, 
                    employee_email
                );
                pay_period_employee_details.value = response;

                return true;
            } catch (error) {
                console.error('There was an error retrieving timesheet details for this employee: ', error);
                // TODO: More in-depth error-handling here
            }

            pay_period_employee_details.value = default_pay_period_employee_details;
            return false;
        });
    };

    const getTimesheetApprovalCSVReport = async (report_filters?: PayPeriodReportFilters) => {
        return withLoading( is_loading, async () => {
            try {
                const response = await timesheetApprovalService.getTimesheetApprovalCSVReport(
                    pay_period.value.pay_year, 
                    pay_period.value.pay_period_no, 
                    report_filters
                );
                pay_period_report.value = response;

                return true;
            } catch (error) {
                console.error('There was an error retrieving the report CSV: ', error);
                // TODO: More in-depth error-handling here
            }

            return false;
        });
    };

    return { 
        pay_period, 
        pay_period_employee_overview_list,
        pay_period_employee_overview,
        pay_period_employee_details,
        timesheet,
        is_loading,
        is_calendar_limit,
        getPayPeriodByDateOrYearAndNumber,
        getTimesheetByEmail,
        getPayPeriodEmployeeOverviewListBySupervisorEmail,
        getPayPeriodOverviewByEmployeeEmail,
        getPayPeriodEmployeeDetailsByEmployeeEmail,
        getTimesheetApprovalCSVReport,
    };
});