<?php

namespace App\Http\Controllers\Api\Admin\Invoice;

use App\Http\Controllers\Controller;
use App\Http\Requests\InvoiceRequest;
use App\Http\Resources\Api\Admin\InvoiceResource;
use App\Models\Customer;
use App\Models\Payment;
use App\Repositories\Invoice\InvoiceRepositoryInterface;
use App\Repositories\InvoiceItem\InvoiceItemRepositoryInterface;
use App\Repositories\Order\OrderRepositoryInterface;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Yajra\DataTables\Facades\DataTables;

class InvoiceController extends Controller
{
    public function __construct(
        private readonly InvoiceRepositoryInterface $invoiceRepository,
        private readonly OrderRepositoryInterface $orderRepository,
        private readonly InvoiceItemRepositoryInterface $invoiceItemRepository,
    ) {}

    public function index(Request $request): JsonResponse
    {
        $query = $this->invoiceRepository->filter(
            $request->all(),
            ['payment', 'customer'],
            [],
            ['*'],
            true
        );

        return response()->json([
            'error' => false,
            'data' => [
                'items' => InvoiceResource::collection($query->get())->resolve(),
                'total' => $query->count(),
            ],
        ]);
    }

    public function datatable(Request $request): JsonResponse
    {
        $query = $this->invoiceRepository->filter(
            $request->all(),
            ['payment', 'customer'],
            [],
            ['*'],
            true
        );

        return DataTables::eloquent($query)
            ->addColumn('invoice_num', fn($d) => $d->invoice_num)
            ->addColumn('date', fn($d) => $d->date)
            ->addColumn('customer', fn($d) => $d->customer?->fullname)
            ->addColumn('payment', fn($d) => $d->payment?->name)
            ->addColumn('total', fn($d) => $d->total)
            ->addColumn('status', fn($d) => $d->status)
            ->addColumn('action', fn($d) => $d->id)
            ->rawColumns(['invoice_num', 'date', 'customer', 'payment', 'total', 'status', 'action'])
            ->make(true);
    }

    public function store(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'customer_id' => 'required|numeric',
            'payment_id' => 'required|numeric',
            'sub_total' => 'required|numeric',
            'total' => 'required|numeric',
        ]);

        $invoiceData = [
            'date' => time(),
            'due_date' => time() + (7 * 24 * 60 * 60),
            'sub_total' => $validated['sub_total'],
            'tax' => $validated['sub_total'] * 0.1,
            'total' => $validated['total'],
            'payment_id' => $validated['payment_id'],
            'customer_id' => $validated['customer_id'],
            'status' => 0,
        ];

        try {
            DB::beginTransaction();
            $invoice = $this->invoiceRepository->create($invoiceData);
            DB::commit();

            return response()->json([
                'error' => false,
                'message' => 'Invoice created successfully',
                'data' => new InvoiceResource($invoice)
            ], 201);
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json([
                'error' => true,
                'message' => $e->getMessage()
            ], 500);
        }
    }

    public function show(int $id): JsonResponse
    {
        $invoice = $this->invoiceRepository->findWithRelationships($id, ['payment', 'invoiceItem', 'customer']);

        if (!$invoice) {
            return response()->json([
                'error' => true,
                'message' => "Can't find invoice by ID #" . $id
            ], 404);
        }

        return response()->json([
            'error' => false,
            'data' => new InvoiceResource($invoice)
        ]);
    }

    public function update(InvoiceRequest $request, int $id): JsonResponse
    {
        $invoice = $this->invoiceRepository->find($id);

        if (!$invoice) {
            return response()->json([
                'error' => true,
                'message' => "Can't find invoice by ID #" . $id
            ], 404);
        }

        $request->validated();

        $status = match (strtolower($request->get('action'))) {
            "paid" => 1,
            "cancel" => 2,
            default => 0
        };

        try {
            DB::beginTransaction();
            $this->invoiceRepository->update($id, [
                'status' => $status,
                'date_paid' => $status === 1 ? time() : null
            ]);
            DB::commit();

            return response()->json([
                'error' => false,
                'message' => 'Invoice updated successfully'
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json([
                'error' => true,
                'message' => $e->getMessage()
            ], 500);
        }
    }

    public function destroy(int $id): JsonResponse
    {
        $invoice = $this->invoiceRepository->find($id);

        if (!$invoice) {
            return response()->json([
                'error' => true,
                'message' => "Can't find invoice by ID #" . $id
            ], 404);
        }

        try {
            DB::beginTransaction();
            $this->orderRepository->updateBy('invoice_id', $id, ['invoice_id' => 0]);
            $this->invoiceRepository->delete($id);
            DB::commit();

            return response()->json([
                'error' => false,
                'message' => 'Invoice deleted successfully'
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json([
                'error' => true,
                'message' => $e->getMessage()
            ], 500);
        }
    }

    public function markAsPaid(int $id): JsonResponse
    {
        $invoice = $this->invoiceRepository->find($id);

        if (!$invoice) {
            return response()->json([
                'error' => true,
                'message' => "Can't find invoice by ID #" . $id
            ], 404);
        }

        try {
            DB::beginTransaction();
            $this->invoiceRepository->update($id, [
                'status' => 1,
                'date_paid' => time()
            ]);
            DB::commit();

            return response()->json([
                'error' => false,
                'message' => 'Invoice marked as paid'
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json([
                'error' => true,
                'message' => $e->getMessage()
            ], 500);
        }
    }

    public function cancel(int $id): JsonResponse
    {
        $invoice = $this->invoiceRepository->find($id);

        if (!$invoice) {
            return response()->json([
                'error' => true,
                'message' => "Can't find invoice by ID #" . $id
            ], 404);
        }

        try {
            DB::beginTransaction();
            $this->invoiceRepository->update($id, [
                'status' => 2,
                'date_paid' => null
            ]);
            DB::commit();

            return response()->json([
                'error' => false,
                'message' => 'Invoice cancelled'
            ]);
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json([
                'error' => true,
                'message' => $e->getMessage()
            ], 500);
        }
    }
}