<?php

namespace App\Http\Controllers\Finance;

use App\Http\Controllers\Controller;
use App\Models\Finance\DailyFundTransaction;
use App\Models\Finance\DailyFundMemo;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class DailyFundController extends Controller
{
    public function index(Request $request): JsonResponse
    {
        $tenantId = session('selected_tenant_id', 1);
        $date = $request->input('date', date('Y-m-d'));

        $transactions = DailyFundTransaction::forTenant($tenantId)
            ->where('transaction_date', $date)
            ->orderBy('time')
            ->get()
            ->map(function ($tx) {
                return [
                    'id' => $tx->id,
                    'type' => $tx->type,
                    'time' => $tx->time,
                    'accountId' => $tx->account_id,
                    'accountName' => $tx->account_name,
                    'description' => $tx->description,
                    'amount' => $tx->amount,
                    'category' => $tx->category,
                    'note' => $tx->note,
                ];
            });

        $income = $transactions->where('type', 'income')->values();
        $expense = $transactions->where('type', 'expense')->values();

        // 메모
        $memoRecord = DailyFundMemo::forTenant($tenantId)
            ->where('memo_date', $date)
            ->first();

        // 전일 잔액 계산: 해당 날짜 이전 모든 거래의 합
        $previousBalance = DailyFundTransaction::forTenant($tenantId)
            ->where('transaction_date', '<', $date)
            ->selectRaw("
                COALESCE(SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END), 0) -
                COALESCE(SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END), 0) as balance
            ")
            ->value('balance') ?? 0;

        return response()->json([
            'success' => true,
            'data' => [
                'income' => $income,
                'expense' => $expense,
                'previousBalance' => (int) $previousBalance,
                'memo' => $memoRecord?->memo ?? '',
                'author' => $memoRecord?->author ?? '',
                'updatedAt' => $memoRecord?->updated_at?->format('Y-m-d H:i') ?? '',
            ],
        ]);
    }

    public function store(Request $request): JsonResponse
    {
        $request->validate([
            'transactionDate' => 'required|date',
            'type' => 'required|in:income,expense',
            'description' => 'required|string|max:200',
            'amount' => 'required|integer|min:1',
        ]);

        $tenantId = session('selected_tenant_id', 1);

        $tx = DailyFundTransaction::create([
            'tenant_id' => $tenantId,
            'transaction_date' => $request->input('transactionDate'),
            'type' => $request->input('type'),
            'time' => $request->input('time'),
            'account_id' => $request->input('accountId'),
            'account_name' => $request->input('accountName'),
            'description' => $request->input('description'),
            'amount' => $request->input('amount'),
            'category' => $request->input('category'),
            'note' => $request->input('note'),
        ]);

        return response()->json([
            'success' => true,
            'message' => '거래가 등록되었습니다.',
            'data' => ['id' => $tx->id],
        ]);
    }

    public function update(Request $request, int $id): JsonResponse
    {
        $tenantId = session('selected_tenant_id', 1);
        $tx = DailyFundTransaction::forTenant($tenantId)->findOrFail($id);

        $request->validate([
            'description' => 'required|string|max:200',
            'amount' => 'required|integer|min:1',
        ]);

        $tx->update([
            'type' => $request->input('type', $tx->type),
            'time' => $request->input('time'),
            'account_id' => $request->input('accountId'),
            'account_name' => $request->input('accountName'),
            'description' => $request->input('description'),
            'amount' => $request->input('amount'),
            'category' => $request->input('category'),
            'note' => $request->input('note'),
        ]);

        return response()->json([
            'success' => true,
            'message' => '거래가 수정되었습니다.',
        ]);
    }

    public function destroy(int $id): JsonResponse
    {
        $tenantId = session('selected_tenant_id', 1);
        $tx = DailyFundTransaction::forTenant($tenantId)->findOrFail($id);
        $tx->delete();

        return response()->json([
            'success' => true,
            'message' => '거래가 삭제되었습니다.',
        ]);
    }

    public function saveMemo(Request $request): JsonResponse
    {
        $tenantId = session('selected_tenant_id', 1);

        $request->validate([
            'date' => 'required|date',
        ]);

        $memo = DailyFundMemo::updateOrCreate(
            ['tenant_id' => $tenantId, 'memo_date' => $request->input('date')],
            [
                'memo' => $request->input('memo', ''),
                'author' => $request->input('author', ''),
            ]
        );

        return response()->json([
            'success' => true,
            'message' => '메모가 저장되었습니다.',
            'data' => [
                'updatedAt' => $memo->updated_at->format('Y-m-d H:i'),
            ],
        ]);
    }
}