<?php

namespace Modules\StaffPayroll\Http\Controllers\API;

use Carbon\Carbon;
use Illuminate\Support\Arr;
use Illuminate\Http\Request;
use Illuminate\Routing\Controller;
use Illuminate\Support\Facades\DB;
use Modules\StaffPayroll\Entities\Invoice;
use Illuminate\Contracts\Support\Renderable;
use Modules\StaffPayroll\Entities\InvoiceItem;
use Modules\StaffPayroll\Entities\InvoiceSetting;
use Modules\GeneralSetting\Entities\GeneralSetting;
use Modules\StaffPayroll\Http\Requests\InvoiceRequest;
use Modules\StaffPayroll\Services\InvoiceService;
use Modules\StaffPayroll\Transformers\InvoiceResource;

class InvoiceController extends Controller
{

    public function index(Request $request)
    {
        $invoiceQuery = Invoice::query()->select('invoices.*', 'users.first_name', 'users.last_name')->leftJoin('users', 'invoices.user_id', '=', 'users.id')->with(['items',
            'payout',
            'user',
            'items.incentive',
            'items.video',
        ]);
            
        if(!permissionCheck('invoices.view.all')){
            $invoiceQuery = $invoiceQuery->where('user_id', auth()->user()->id);
        }

        if (permissionCheck('hide-pending-invoices') && !is_admin_user(auth()->id())) {
            $invoiceQuery = $invoiceQuery->where('invoices.is_approved', true);
        }

        if ($request->has('filter')) {
            $filter = json_decode($request->filter);
            $invoiceQuery = $invoiceQuery->where(function($query) use($filter) {
                if(isset($filter->invoice_no) && $filter->invoice_no->value != null){
                    $invoice_no = $filter->invoice_no->value;
                    $query->where('invoices.id', $invoice_no);
                }
                if(isset($filter->creator) && $filter->creator->value != null){
                    $creator = $filter->creator->value;
                    $query->where('invoices.user_id', $creator);
                }
                if(isset($filter->status) && $filter->status->value != null){
                    $status = $filter->status->value;
                    $query->where('invoices.status', $status);
                }
                if(isset($filter->issue_date) && $filter->issue_date->value != null && count($filter->issue_date->value) > 0){

                    if(count($filter->issue_date->value) == 2){
                        $startDate = Carbon::parse($filter->issue_date->value[0])->format('Y-m-d');
                        $endDate = Carbon::parse($filter->issue_date->value[1])->format('Y-m-d');
                        $query->whereBetween('issue_date', [$startDate, $endDate]);
                    } else {
                        $issue_date = Carbon::parse($filter->issue_date->value[0])->format('Y-m-d');
                        $query->whereDate('issue_date', $issue_date);
                    }
                    
                }
                if(isset($filter->is_approved) && is_numeric($filter->is_approved->value)){
                    $is_approved = $filter->is_approved->value;
                    $query->where('invoices.is_approved', $is_approved);
                }


            });

        }
        
        
        $statistics['total_paid_sum'] = (float)$invoiceQuery->clone()->where('invoices.status','PAID')->sum('total_amount');
        $statistics['total_paid_count'] = $invoiceQuery->clone()->where('invoices.status','PAID')->count();
        $statistics['total_unpaid_sum'] = 0;
        $statistics['total_unpaid_count'] = 0;
        foreach ($invoiceQuery->clone()->where('invoices.status','UNPAID')->get() as $statistic) {
        
            if($statistic->status == 'UNPAID'){
                $invoice_sum = 0;
                foreach ($statistic->items as $item) {
                    $invoice_sum += $item->quantity * $item->amount;
                }  

                $statistics['total_unpaid_sum'] += $invoice_sum;
                $statistics['total_unpaid_count']++;

            }
        }
        $statistics['total_amount'] = $statistics['total_paid_sum'] + $statistics['total_unpaid_sum'];

        $invoices = $invoiceQuery->clone()->orderBy('users.first_name')
        ->orderBy('users.last_name')
        ->orderBy('invoices.id', 'desc')
        ->paginate($request->rows);


        return response()->json([
            'invoices' => InvoiceResource::collection($invoices)->response()->getData(),
            'statistics' => $statistics
        ]);


        // $page = 0;
        // $rows = 10;

        // if ($request->has('paging')) {
        //     $paging = json_decode($request->paging);
        //     $page = $paging->page;
        //     $rows = $paging->rows;
        // }

        // $invoices = Invoice::query()
        //     ->select('invoices.*', 'users.first_name', 'users.last_name')
        //     ->leftJoin('users', 'invoices.user_id', '=', 'users.id')
        //     ->with(['payout', 'user', 'items.incentive', 'items.video'])
        //     ->when(!permissionCheck('invoices.view.all'), fn ($query) => $query->where('user_id', auth()->id()))
        //     ->when($request->filled('search'), function ($query) use ($request) {
        //         $search  = $request->search;
        //         $query->whereHas('user', function( $query ) use ( $search ){
        //               $query->where('first_name', 'LIKE', "%{$search}%");
        //               $query->orWhere('last_name', 'LIKE', "%{$search}%");
        //           })->orWhere('id', 'LIKE', "%{$search}%");
        //     })
        //     ->when($request->filled('created_at'), function ($query) use ($request) {
        //         $createdAt = explode(',', $request->created_at);
        //         $query->whereBetween(DB::raw('DATE(invoices.created_at)'), $createdAt);
        //     })
        //     ->when($request->filled('due_date'), function ($query) use ($request) {
        //         $dueDate = explode(',', $request->due_date);
        //         $query->whereBetween(DB::raw('DATE(due_date)'), $dueDate);
        //     })
        //     ->when($request->filled('statuses'), fn ($query) => $query->whereIn('status', explode(',', $request->statuses)))
        //     ->when($request->filled('user'), fn ($query) => $query->where('user_id', $request->user))
        //     ->when($request->filled('paid_range'), function ($query) use ($request) {
        //         $paidRange = explode(',', $request->paid_range);
        //         $query->whereHas('items', function ($query) use ($paidRange) {
        //             $query->whereBetween(DB::raw('amount * quantity'), $paidRange);
        //         });
        //     })
        //     ->when($request->filled('invoice_no'), function($query) use($request) {
        //         $query->where('invoices.id', $request->invoice_no);
        //     })
        //     ->when($request->filled('creators'), function($query) use($request) {
        //         $query->whereIn('user_id', $request->creators);
        //     })
        //     ->when($request->filled('start_date') && $request->filled('end_date'), fn ($query) => $query->whereBetween(DB::raw('DATE(invoices.created_at)'), [$request->start_date, $request->end_date]))
        //     ->when($request->filled('status') && $request->status != 'ALL', function($query) use($request) {
        //         $query->where('invoices.status', $request->status);
        //     })
        //     ->when($request->filled('approval') && $request->approval != 'ALL', function($query) use($request) {
        //         $approval = $request->approval;

        //         if ($approval == 'APPROVED') {
        //             $query->where('is_approved', true);
        //         }
        //         else {
        //             $query->where('is_approved', false);
        //         }
        //     })
        //     //->latest('invoices.created_at')
        //     ->orderBy('users.first_name')
        //     ->orderBy('users.last_name')
        //     ->orderBy('invoices.id', 'desc')
        //     //->orderBy('user.last_name')
        //     //->getOrPaginate($request->per_page);
        //     ->skip($page * $rows)
        //     ->take($rows)
        //     ->get();

        // return InvoiceResource::collection($invoices);
    }

    public function store(InvoiceRequest $request)
    {
        $validated = $request->validated();

        try {
            DB::beginTransaction();

            $latestInvoice = Invoice::query()
                ->latest()
                ->first();

            $validated['invoice_number'] = $latestInvoice ? $latestInvoice->id + 1 : 1;
            $validated['created_by'] = auth()->id();

            foreach ($validated['items'] as $key => $item) {
                if ($item['label'] == 'item') {
                    $validated['items'][$key]['name'] = 'Item';
                }
            }

            $invoice = Invoice::create($validated);
            $invoice->items()->createMany($validated['items']);

            DB::commit();

            return response()->noContent();
        } catch (\Exception $ex) {
            DB::rollBack();
            throw new \Exception($ex->getMessage());
        }
    }

    public function details(Invoice $invoice)
    {
        $invoice->load(['user.staff', 'items']);

        return response()->json([
            'invoice' => $invoice
        ]);
    }

    public function update(InvoiceRequest $request, Invoice $invoice)
    {
        try {
            DB::beginTransaction();
            $validated = $request->validated();
            $invoice->update($validated);

            $validated['items'] = collect($validated['items'])->map(function ($item) {
                $item['issue_date'] = Carbon::parse($item['issue_date'])->toDateString();

                return $item;
            })
                ->toArray();

            foreach ($validated['items'] as $key => $item) {
                if ($item['label'] == 'item') {
                    $item['name'] = 'Item';
                }

                $invoice->items()->updateOrCreate(
                    [
                        'id' => $item['id'] ?? null,
                    ],
                    $item
                );
            }

            $itemsId = collect($validated['items'])->pluck('id')->toArray();
            $invoice->items()
                ->whereNotIn('id', $itemsId)
                ->delete();

            DB::commit();

            return response()->noContent();
        } catch (\Exception $ex) {
            DB::rollBack();
            throw new \Exception($ex->getMessage());
        }
    }

    public function latestInvoiceNo()
    {
        $latestInvoiceNumber = 1;

        $invoice = Invoice::query()
            ->select('id')
            ->latest()
            ->first();

        if (!$invoice) {
            $invoiceSetting = InvoiceSetting::query()
                ->select('value')
                ->where('name', 'start_invoice_number')
                ->first();

            return [
                'invoice_number' => $invoiceSetting ? $invoiceSetting->value : $latestInvoiceNumber
            ];
        }

        return [
            'invoice_number' => $invoice->id + 1
        ];
    }

    public function statistics(Request $request)
    {
        return Invoice::query()
            ->select(DB::raw('status, count(*) as invoices'))
            ->groupBy('status')
            ->when(!permissionCheck('invoices.view.all') && permissionCheck('invoices.index'), function($query) {
                $query->where('user_id', auth()->id());
            })
            ->when($request->filled('invoice_no'), function($query) use($request) {
                $query->where('id', $request->invoice_no);
            })
            ->when($request->filled('creators'), function($query) use($request) {
                $creators = $request->creators;

                $query->whereIn('user_id', $creators);
            })
            ->when($request->filled('start_date') && $request->filled('end_date'), fn ($query) => $query->whereBetween(DB::raw('DATE(invoices.created_at)'), [$request->start_date, $request->end_date]))
            ->when($request->filled('status') && $request->status != 'ALL', function($query) use($request) {
                $query->where('status', $request->status);
            })
            ->when($request->filled('approval') && $request->approval != 'ALL', function($query) use($request) {
                $approval = $request->approval;

                if ($approval == 'APPROVED') {
                    $query->where('is_approved', true);
                }
                else {
                    $query->where('is_approved', false);
                }
            })
            ->get();
    }

    public function changeStatus(Invoice $invoice)
    {   
        if($invoice->status == Invoice::STATUS_UNPAID){
            $invoice->status = Invoice::STATUS_PAID;
            $invoice->total_amount = (new InvoiceService)->getInvoiceAmount($invoice);
        } else {
            $invoice->status = Invoice::STATUS_UNPAID;
            $invoice->total_amount = 0;
        }

        $invoice->update();

        return response()->json([
            'message' => 'Status has been successfully updated.',
            'invoice' => InvoiceResource::make($invoice->load(['payout', 'user', 'items']))
        ]);
    }

    public function changeApproval(Invoice $invoice)
    {
        $invoice->is_approved = $invoice->is_approved ? false : true;
        $invoice->update();

        return response()->json([
            'message' => 'Approval status has been successfully updated.',
            'invoice' => InvoiceResource::make($invoice->load(['payout', 'user', 'items']))
        ]);
    }

    public function destroy(Invoice $invoice)
    {
        $invoice->items()->delete();
        $invoice->delete();

        return response()->noContent();
    }

    public function getInvoiceCount(Request $request)
    {
        return Invoice
            ::when($request->filled('invoice_no'), function($query) use($request) {
                $query->where('id', $request->invoice_no);
            })
            ->when($request->filled('start_date') && $request->filled('end_date'), fn ($query) => $query->whereBetween(DB::raw('DATE(created_at)'), [$request->start_date, $request->end_date]))
            ->when($request->filled('creators'), function($query) use($request) {
                $query->whereIn('user_id', $request->creators);
            })
            ->when($request->filled('status') && $request->status != 'ALL', function($query) use($request) {
                $query->where('status', $request->status);
            })
            ->when($request->filled('approval') && $request->approval != 'ALL', function($query) use($request) {
                $approval = $request->approval;

                if ($approval == 'APPROVED') {
                    $query->where('is_approved', true);
                }
                else {
                    $query->where('is_approved', false);
                }
            })
            ->when(!permissionCheck('invoices.view.all') && permissionCheck('invoices.index'), function($query) {
                $query->where('user_id', auth()->id());
            })
            ->get()->count();
    }

    public function reprocess(Invoice $invoice)
    {
        $service = new InvoiceService();

        return $service->reprocess($invoice);
    }

    public function applyReprocessedItems(Invoice $invoice)
    {
        $invoice->applyReprocessedItems();

        return response()->json([
            'invoice' => InvoiceResource::make($invoice->load(['payout', 'user', 'items'])->unsetRelation('reprocessedItems'))
        ]);
    }

    public function reprocessAllPending()
    {
        $service = new InvoiceService();
        $service->reprocessAllPending();

        return response()->json([
            'message' => 'All pending invoices have been reprocessed.',
        ]);
    }
}