<?php

namespace App\Helpers;

use App\Models\Admin;
use App\Models\FormEntertaimentPresentation;
use App\Models\FormMeetingSeminar;
use App\Models\FormOthers;
use App\Models\FormUpCountry;
use App\Models\FormVehicleRunningCost;
use Illuminate\Support\Facades\DB;
use App\Models\UserHasCabang;
use Illuminate\Support\Carbon;

class FormHelper
{
    /**
     * Helper internal untuk menghitung rentang siklus tanggal
     * Menghasilkan: Start (11), Max Input (10 bln depan), Closing (13 bln depan)
     */
    private static function getCycleRange($month, $year)
{
    // Pastikan di-cast ke (int) agar Carbon tidak error
    $startDay = (int) env('STARTING_DATE', 11);
    $maxInputDay = (int) env('INPUT_MAX_DATE', 10);
    $closingDay = (int) env('CLOSING_DATE', 13);

    // Mengambil nomor bulan sebagai integer
    $monthNumber = (int) date('m', strtotime($month . ' 1'));
    
    // Pastikan $year juga integer
    $year = (int) $year;

    // Carbon::createFromDate membutuhkan integer
    $startDate = \Illuminate\Support\Carbon::createFromDate($year, $monthNumber, $startDay)->startOfDay();
    
    // Input maksimal dan Closing menggunakan method ->day() yang butuh integer
    $maxInputDate = $startDate->copy()->addMonth()->day($maxInputDay)->endOfDay();
    $closingDate = $startDate->copy()->addMonth()->day($closingDay)->endOfDay();

    return [
        'start' => $startDate->toDateTimeString(),
        'input_max' => $maxInputDate->toDateTimeString(),
        'closing' => $closingDate->toDateTimeString(),
        'display_label' => $startDate->format('d M') . ' - ' . $maxInputDate->format('d M Y')
    ];
}

    public static function getFormsByUserIds($userIds, $month, $year) {
        $dates = self::getCycleRange($month, $year);
        $startDate = $dates['start'];
        $closingDate = $dates['closing']; // Mengacu ke Closing Date (13)

        $users = Admin::with(['region', 'cabang'])
            ->whereIn('id', $userIds)
            ->get();

        $formUpCountryQuery = FormUpCountry::select(
                'expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at',
                DB::raw("'Up Country' as type")
            )->whereIn('user_id', $userIds)
            ->whereBetween('tanggal', [$startDate, $closingDate]);

        $formVehicleRunningCostQuery = FormVehicleRunningCost::select(
                'expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at',
                DB::raw("'Vehicle Running Cost' as type")
            )->whereIn('user_id', $userIds)
            ->whereBetween('tanggal', [$startDate, $closingDate]);

        $formEntertaimentPresentationQuery = FormEntertaimentPresentation::select(
                'expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at',
                DB::raw("'Entertainment Presentation' as type")
            )->whereIn('user_id', $userIds)
            ->whereBetween('tanggal', [$startDate, $closingDate]);

        $formMeetingSeminarQuery = FormMeetingSeminar::select(
                'expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at',
                DB::raw("'Meeting Seminar' as type")
            )->whereIn('user_id', $userIds)
            ->whereBetween('created_at', [$startDate, $closingDate]);

        $formOthersQuery = FormOthers::select(
                'expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at',
                DB::raw("'Others' as type")
            )->whereIn('user_id', $userIds)
            ->whereBetween('tanggal', [$startDate, $closingDate]);

        $forms = $formUpCountryQuery
            ->union($formVehicleRunningCostQuery)
            ->union($formEntertaimentPresentationQuery)
            ->union($formMeetingSeminarQuery)
            ->union($formOthersQuery)
            ->get();

        return $forms->map(function ($form) use ($users) {
            $user = $users->firstWhere('id', $form->user_id);
            $form->user = $user;
            return $form;
        });
    }

    public static function getAllForms($month, $year) {
        $dates = self::getCycleRange($month, $year);
        $startDate = $dates['start'];
        $closingDate = $dates['closing'];

        $users = Admin::with(['region', 'cabang'])->get();

        $commonSelect = ['expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at'];

        $queries = [
            FormUpCountry::select(array_merge($commonSelect, [DB::raw("'Up Country' as type")]))->whereBetween('tanggal', [$startDate, $closingDate]),
            FormVehicleRunningCost::select(array_merge($commonSelect, [DB::raw("'Vehicle Running Cost' as type")]))->whereBetween('tanggal', [$startDate, $closingDate]),
            FormEntertaimentPresentation::select(array_merge($commonSelect, [DB::raw("'Entertainment Presentation' as type")]))->whereBetween('tanggal', [$startDate, $closingDate]),
            FormMeetingSeminar::select(array_merge($commonSelect, [DB::raw("'Meeting Seminar' as type")]))->whereBetween('created_at', [$startDate, $closingDate]),
            FormOthers::select(array_merge($commonSelect, [DB::raw("'Others' as type")]))->whereBetween('tanggal', [$startDate, $closingDate]),
        ];

        $mainQuery = array_shift($queries);
        foreach ($queries as $q) { $mainQuery->union($q); }
        
        $forms = $mainQuery->get();

        return $forms->map(function ($form) use ($users) {
            $user = $users->firstWhere('id', $form->user_id);
            $form->user = $user;
            return $form;
        });
    }

    /**
     * Dashboard Info: Menghasilkan label periode input (11-10)
     */
    public static function getDashboardPeriodLabel($month, $year) {
        return self::getCycleRange($month, $year)['display_label'];
    }

    public static function getNominalByFormType($cabang_id, $type, $type_id, $month, $year) {
        $users = UserHasCabang::where('cabang_id', $cabang_id)->get();
        $userIds = $users->pluck('user_id')->toArray();
        
        // Menggunakan logika cycle agar nominal yang muncul sinkron dengan cutoff
        $dates = self::getCycleRange($month, $year);
        $start = $dates['start'];
        $end = $dates['closing'];

        $query = null;
        if($type == 'Up Country') {
            $query = FormUpCountry::whereIn('user_id', $userIds)->whereBetween('tanggal', [$start, $end]);
        } else if($type == 'Vehicle Running Cost') {
            $query = FormVehicleRunningCost::whereIn('user_id', $userIds)->whereBetween('tanggal', [$start, $end]);
        } else if($type == 'Entertainment') {
            $query = FormEntertaimentPresentation::whereIn('user_id', $userIds)->whereBetween('tanggal', [$start, $end]);
        } else if($type == 'Meeting / Seminar') {
            $query = FormMeetingSeminar::whereIn('user_id', $userIds)->whereBetween('created_at', [$start, $end]);
        } else {
            $query = FormOthers::whereIn('user_id', $userIds)->whereBetween('tanggal', [$start, $end])->where('kategori_id', $type_id);
        }

        return $query->whereIn('status', ['Approved', 'Closed'])->sum('approved_total');
    }

    public static function getTotalAmount($userIds, $month, $year) {
        $dates = self::getCycleRange($month, $year);
        $startDate = $dates['start'];
        $closingDate = $dates['closing'];

        $users = Admin::with(['region', 'cabang'])->whereIn('id', $userIds)->get();

        $formUpCountryQuery = FormUpCountry::select('expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at', DB::raw("'Up Country' as type"))
            ->whereIn('user_id', $userIds)->whereBetween('final_approved_at', [$startDate, $closingDate]);

        $formVehicleRunningCostQuery = FormVehicleRunningCost::select('expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at', DB::raw("'Vehicle Running Cost' as type"))
            ->whereIn('user_id', $userIds)->whereBetween('final_approved_at', [$startDate, $closingDate]);

        $formEntertaimentPresentationQuery = FormEntertaimentPresentation::select('expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at', DB::raw("'Entertainment Presentation' as type"))
            ->whereIn('user_id', $userIds)->whereBetween('final_approved_at', [$startDate, $closingDate]);

        $formMeetingSeminarQuery = FormMeetingSeminar::select('expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at', DB::raw("'Meeting Seminar' as type"))
            ->whereIn('user_id', $userIds)->whereBetween('final_approved_at', [$startDate, $closingDate]);

        $formOthersQuery = FormOthers::select('expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at', DB::raw("'Others' as type"))
            ->whereIn('user_id', $userIds)->whereBetween('final_approved_at', [$startDate, $closingDate]);

        $forms = $formUpCountryQuery->union($formVehicleRunningCostQuery)->union($formEntertaimentPresentationQuery)->union($formMeetingSeminarQuery)->union($formOthersQuery)->get();

        return $forms->map(function ($form) use ($users) {
            $user = $users->firstWhere('id', $form->user_id);
            $form->user = $user;
            return $form;
        });
    }

    public static function getAllForms2() {
        // Fungsi ini tetap dipertahankan sesuai request (tanpa filter tanggal)
        $users = Admin::with(['region', 'cabang'])->get();
        $commonSelect = ['expense_number', 'user_id', 'total', 'approved_total', 'status', 'account_number', 'created_at'];

        $forms = FormUpCountry::select(array_merge($commonSelect, [DB::raw("'Up Country' as type")]))
            ->union(FormVehicleRunningCost::select(array_merge($commonSelect, [DB::raw("'Vehicle Running Cost' as type")])))
            ->union(FormEntertaimentPresentation::select(array_merge($commonSelect, [DB::raw("'Entertainment Presentation' as type")])))
            ->union(FormMeetingSeminar::select(array_merge($commonSelect, [DB::raw("'Meeting Seminar' as type")])))
            ->union(FormOthers::select(array_merge($commonSelect, [DB::raw("'Others' as type")])))
            ->get();

        return $forms->map(function ($form) use ($users) {
            $user = $users->firstWhere('id', $form->user_id);
            $form->user = $user;
            return $form;
        });
    }
}