<?php

namespace App\Http\Controllers\Api\V1;

use App\Helpers\ApiResponse;
use App\Http\Controllers\Controller;
use App\Models\Tenants\JournalEntry;
use App\Services\CardTransactionService;
use App\Services\JournalSyncService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

/**
 * 카드 거래 조회 컨트롤러
 */
class CardTransactionController extends Controller
{
    public function __construct(
        protected CardTransactionService $service,
        protected JournalSyncService $journalSyncService,
    ) {}

    /**
     * 카드 거래 목록 조회
     */
    public function index(Request $request): JsonResponse
    {
        return ApiResponse::handle(function () use ($request) {
            $params = $request->validate([
                'start_date' => 'nullable|date',
                'end_date' => 'nullable|date|after_or_equal:start_date',
                'card_id' => 'nullable|integer',
                'search' => 'nullable|string|max:100',
                'sort_by' => 'nullable|in:used_at,amount,merchant_name,created_at',
                'sort_dir' => 'nullable|in:asc,desc',
                'per_page' => 'nullable|integer|min:1|max:100',
                'page' => 'nullable|integer|min:1',
            ]);

            return $this->service->index($params);
        }, __('message.fetched'));
    }

    /**
     * 카드 거래 요약 통계
     */
    public function summary(Request $request): JsonResponse
    {
        return ApiResponse::handle(function () use ($request) {
            $params = $request->validate([
                'start_date' => 'nullable|date',
                'end_date' => 'nullable|date|after_or_equal:start_date',
            ]);

            return $this->service->summary($params);
        }, __('message.fetched'));
    }

    /**
     * 카드 거래 대시보드 데이터
     *
     * CEO 대시보드 카드/가지급금 관리 섹션의 cm1 모달용 상세 데이터
     */
    public function dashboard(): JsonResponse
    {
        return ApiResponse::handle(function () {
            return $this->service->dashboard();
        }, __('message.fetched'));
    }

    /**
     * 계정과목 일괄 수정
     */
    public function bulkUpdateAccountCode(Request $request): JsonResponse
    {
        return ApiResponse::handle(function () use ($request) {
            $validated = $request->validate([
                'ids' => 'required|array|min:1',
                'ids.*' => 'required|integer',
                'account_code' => 'required|string|max:20',
            ]);

            $updatedCount = $this->service->bulkUpdateAccountCode(
                $validated['ids'],
                $validated['account_code']
            );

            return ['updated_count' => $updatedCount];
        }, __('message.updated'));
    }

    /**
     * 단일 카드 거래 조회
     */
    public function show(int $id): JsonResponse
    {
        return ApiResponse::handle(function () use ($id) {
            $transaction = $this->service->show($id);

            if (! $transaction) {
                throw new \Illuminate\Database\Eloquent\ModelNotFoundException;
            }

            return $transaction;
        }, __('message.fetched'));
    }

    /**
     * 카드 거래 등록
     */
    public function store(Request $request): JsonResponse
    {
        return ApiResponse::handle(function () use ($request) {
            $validated = $request->validate([
                'card_id' => 'nullable|integer|exists:cards,id',
                'used_at' => 'required|date',
                'merchant_name' => 'required|string|max:100',
                'amount' => 'required|numeric|min:0',
                'description' => 'nullable|string|max:500',
                'account_code' => 'nullable|string|max:20',
            ]);

            return $this->service->store($validated);
        }, __('message.created'));
    }

    /**
     * 카드 거래 수정
     */
    public function update(Request $request, int $id): JsonResponse
    {
        return ApiResponse::handle(function () use ($request, $id) {
            $validated = $request->validate([
                'used_at' => 'nullable|date',
                'merchant_name' => 'nullable|string|max:100',
                'amount' => 'nullable|numeric|min:0',
                'description' => 'nullable|string|max:500',
                'account_code' => 'nullable|string|max:20',
            ]);

            return $this->service->update($id, $validated);
        }, __('message.updated'));
    }

    /**
     * 카드 거래 삭제
     */
    public function destroy(int $id): JsonResponse
    {
        return ApiResponse::handle(function () use ($id) {
            return $this->service->destroy($id);
        }, __('message.deleted'));
    }

    // =========================================================================
    // 분개 (Journal Entries)
    // =========================================================================

    /**
     * 카드 거래 분개 조회
     */
    public function getJournalEntries(int $id): JsonResponse
    {
        return ApiResponse::handle(function () use ($id) {
            $sourceKey = "card_{$id}";
            $data = $this->journalSyncService->getForSource(
                JournalEntry::SOURCE_CARD_TRANSACTION,
                $sourceKey
            );

            if (! $data) {
                return ['items' => []];
            }

            // 프론트엔드가 기대하는 items 형식으로 변환
            $items = array_map(fn ($row) => [
                'id' => $row['id'],
                'supply_amount' => $row['debit_amount'],
                'tax_amount' => 0,
                'account_code' => $row['account_code'],
                'deduction_type' => 'deductible',
                'vendor_name' => $row['vendor_name'],
                'description' => $row['memo'],
                'memo' => '',
            ], $data['rows']);

            return ['items' => $items];
        }, __('message.fetched'));
    }

    /**
     * 카드 거래 분개 저장
     */
    public function storeJournalEntries(Request $request, int $id): JsonResponse
    {
        return ApiResponse::handle(function () use ($request, $id) {
            $validated = $request->validate([
                'items' => 'required|array|min:1',
                'items.*.supply_amount' => 'required|integer|min:0',
                'items.*.tax_amount' => 'required|integer|min:0',
                'items.*.account_code' => 'required|string|max:20',
                'items.*.deduction_type' => 'nullable|string|max:20',
                'items.*.vendor_name' => 'nullable|string|max:200',
                'items.*.description' => 'nullable|string|max:500',
                'items.*.memo' => 'nullable|string|max:500',
            ]);

            // 카드 거래 정보 조회 (날짜용)
            $transaction = $this->service->show($id);
            if (! $transaction) {
                throw new \Illuminate\Database\Eloquent\ModelNotFoundException;
            }

            $entryDate = $transaction->used_at
                ? $transaction->used_at->format('Y-m-d')
                : ($transaction->withdrawal_date?->format('Y-m-d') ?? now()->format('Y-m-d'));

            // items → journal rows 변환 (각 item을 차변 행으로)
            $rows = [];
            foreach ($validated['items'] as $item) {
                $amount = ($item['supply_amount'] ?? 0) + ($item['tax_amount'] ?? 0);
                $rows[] = [
                    'side' => 'debit',
                    'account_code' => $item['account_code'],
                    'debit_amount' => $amount,
                    'credit_amount' => 0,
                    'vendor_name' => $item['vendor_name'] ?? '',
                    'memo' => $item['description'] ?? $item['memo'] ?? '',
                ];
            }

            // 대변 합계 행 (카드미지급금)
            $totalAmount = array_sum(array_column($rows, 'debit_amount'));
            $rows[] = [
                'side' => 'credit',
                'account_code' => '25300', // 미지급금 (표준 코드)
                'account_name' => '미지급금',
                'debit_amount' => 0,
                'credit_amount' => $totalAmount,
                'vendor_name' => $transaction->merchant_name ?? '',
                'memo' => '카드결제',
            ];

            $sourceKey = "card_{$id}";

            return $this->journalSyncService->saveForSource(
                JournalEntry::SOURCE_CARD_TRANSACTION,
                $sourceKey,
                $entryDate,
                "카드거래 분개 (#{$id})",
                $rows,
            );
        }, __('message.created'));
    }
}