<?php

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

use App\Http\Controllers\Controller;
use App\Models\Barobill\BarobillMember;
use App\Services\Barobill\BarobillUsageService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

/**
 * 바로빌 사용량조회 API 컨트롤러
 */
class BarobillUsageController extends Controller
{
    // 바로빌 파트너사 (본사) 테넌트 ID
    private const HEADQUARTERS_TENANT_ID = 1;

    public function __construct(
        protected BarobillUsageService $usageService
    ) {}

    /**
     * 사용량 목록 조회
     *
     * @param start_date string 시작일 (YYYY-MM-DD)
     * @param end_date string 종료일 (YYYY-MM-DD)
     * @param all_tenants bool 전체 테넌트 조회 (본사용)
     */
    public function index(Request $request): JsonResponse|Response
    {
        $tenantId = session('selected_tenant_id');
        $allTenants = $request->boolean('all_tenants', false);
        $isHeadquarters = $tenantId == self::HEADQUARTERS_TENANT_ID;

        // 날짜 파라미터 (기본: 이번 달)
        $startDate = $request->input('start_date', now()->startOfMonth()->format('Y-m-d'));
        $endDate = $request->input('end_date', now()->format('Y-m-d'));

        // 바로빌 API 형식으로 변환 (YYYYMMDD)
        $apiStartDate = str_replace('-', '', $startDate);
        $apiEndDate = str_replace('-', '', $endDate);

        // 테넌트 필터링
        $filterTenantId = (! $isHeadquarters && ! $allTenants && $tenantId) ? $tenantId : null;

        // 사용량 목록 조회
        $usageList = $this->usageService->getUsageList($apiStartDate, $apiEndDate, $filterTenantId);

        // 통계 집계
        $stats = $this->usageService->aggregateStats($usageList);

        // 합계 행 추가
        $totalRow = [
            'member_id' => null,
            'tenant_id' => null,
            'tenant_name' => '합계',
            'biz_no' => '',
            'formatted_biz_no' => '',
            'corp_name' => '',
            'barobill_id' => '',
            'tax_invoice_count' => $stats['total_tax_invoice'],
            'bank_account_count' => $stats['total_bank_account'],
            'card_count' => $stats['total_card'],
            'hometax_count' => $stats['total_hometax'],
            'total_amount' => $stats['total_amount'],
            'is_total_row' => true,
        ];

        // 본사이거나 전체 테넌트 모드면 테넌트 컬럼 표시
        $showAllTenants = $isHeadquarters || $allTenants;

        // HTMX 요청 시 HTML 반환
        if ($request->header('HX-Request')) {
            return response(
                view('barobill.usage.partials.table', [
                    'usageList' => $usageList,
                    'totalRow' => $totalRow,
                    'allTenants' => $showAllTenants,
                    'startDate' => $startDate,
                    'endDate' => $endDate,
                ])->render(),
                200,
                ['Content-Type' => 'text/html']
            );
        }

        return response()->json([
            'success' => true,
            'data' => $usageList,
            'total' => $totalRow,
            'meta' => [
                'start_date' => $startDate,
                'end_date' => $endDate,
                'all_tenants' => $showAllTenants,
            ],
        ]);
    }

    /**
     * 통계 카드 데이터 조회
     */
    public function stats(Request $request): JsonResponse|Response
    {
        $tenantId = session('selected_tenant_id');
        $allTenants = $request->boolean('all_tenants', false);
        $isHeadquarters = $tenantId == self::HEADQUARTERS_TENANT_ID;

        // 날짜 파라미터
        $startDate = $request->input('start_date', now()->startOfMonth()->format('Y-m-d'));
        $endDate = $request->input('end_date', now()->format('Y-m-d'));

        // 바로빌 API 형식으로 변환
        $apiStartDate = str_replace('-', '', $startDate);
        $apiEndDate = str_replace('-', '', $endDate);

        // 테넌트 필터링
        $filterTenantId = (! $isHeadquarters && ! $allTenants && $tenantId) ? $tenantId : null;

        // 사용량 목록 조회 및 통계 집계
        $usageList = $this->usageService->getUsageList($apiStartDate, $apiEndDate, $filterTenantId);
        $stats = $this->usageService->aggregateStats($usageList);

        // HTMX 요청 시 HTML 반환
        if ($request->header('HX-Request')) {
            return response(
                view('barobill.usage.partials.stats', compact('stats'))->render(),
                200,
                ['Content-Type' => 'text/html']
            );
        }

        return response()->json([
            'success' => true,
            'data' => $stats,
        ]);
    }

    /**
     * 단일 회원사 상세 사용량 조회
     */
    public function show(Request $request, int $memberId): JsonResponse|Response
    {
        $member = BarobillMember::with('tenant:id,company_name')->find($memberId);

        if (! $member) {
            return response()->json([
                'success' => false,
                'message' => '회원사를 찾을 수 없습니다.',
            ], 404);
        }

        // 날짜 파라미터
        $startDate = $request->input('start_date', now()->startOfMonth()->format('Y-m-d'));
        $endDate = $request->input('end_date', now()->format('Y-m-d'));

        // 바로빌 API 형식으로 변환
        $apiStartDate = str_replace('-', '', $startDate);
        $apiEndDate = str_replace('-', '', $endDate);

        // 사용량 조회
        $usage = $this->usageService->getMemberUsage($member, $apiStartDate, $apiEndDate);

        // 서비스별 단가 정보
        $priceInfo = BarobillUsageService::getPriceInfo();

        // HTMX 요청 시 모달 HTML 반환
        if ($request->header('HX-Request')) {
            return response(
                view('barobill.usage.partials.detail-modal', [
                    'member' => $member,
                    'usage' => $usage,
                    'priceInfo' => $priceInfo,
                    'startDate' => $startDate,
                    'endDate' => $endDate,
                ])->render(),
                200,
                ['Content-Type' => 'text/html']
            );
        }

        return response()->json([
            'success' => true,
            'data' => [
                'member' => $member,
                'usage' => $usage,
                'price_info' => $priceInfo,
            ],
        ]);
    }

    /**
     * 엑셀 다운로드
     */
    public function export(Request $request)
    {
        $tenantId = session('selected_tenant_id');
        $allTenants = $request->boolean('all_tenants', false);
        $isHeadquarters = $tenantId == self::HEADQUARTERS_TENANT_ID;

        // 날짜 파라미터
        $startDate = $request->input('start_date', now()->startOfMonth()->format('Y-m-d'));
        $endDate = $request->input('end_date', now()->format('Y-m-d'));

        // 바로빌 API 형식으로 변환
        $apiStartDate = str_replace('-', '', $startDate);
        $apiEndDate = str_replace('-', '', $endDate);

        // 테넌트 필터링
        $filterTenantId = (! $isHeadquarters && ! $allTenants && $tenantId) ? $tenantId : null;

        // 사용량 목록 조회
        $usageList = $this->usageService->getUsageList($apiStartDate, $apiEndDate, $filterTenantId);
        $stats = $this->usageService->aggregateStats($usageList);

        // CSV 생성
        $filename = "barobill_usage_{$startDate}_{$endDate}.csv";

        $headers = [
            'Content-Type' => 'text/csv; charset=UTF-8',
            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
        ];

        $callback = function () use ($usageList, $stats, $isHeadquarters, $allTenants) {
            $file = fopen('php://output', 'w');

            // BOM for Excel UTF-8
            fprintf($file, chr(0xEF).chr(0xBB).chr(0xBF));

            // 헤더
            $headerRow = ['사업자번호', '상호', '바로빌ID', '세금계산서(건)', '계좌조회(건)', '카드내역(건)', '홈텍스(건)', '과금액(원)'];
            if ($isHeadquarters || $allTenants) {
                array_unshift($headerRow, 'T-ID', '테넌트');
            }
            fputcsv($file, $headerRow);

            // 데이터
            foreach ($usageList as $usage) {
                $row = [
                    $usage['formatted_biz_no'],
                    $usage['corp_name'],
                    $usage['barobill_id'],
                    $usage['tax_invoice_count'],
                    $usage['bank_account_count'],
                    $usage['card_count'],
                    $usage['hometax_count'],
                    $usage['total_amount'],
                ];
                if ($isHeadquarters || $allTenants) {
                    array_unshift($row, $usage['tenant_id'], $usage['tenant_name']);
                }
                fputcsv($file, $row);
            }

            // 합계
            $totalRow = ['', '', '합계', $stats['total_tax_invoice'], $stats['total_bank_account'], $stats['total_card'], $stats['total_hometax'], $stats['total_amount']];
            if ($isHeadquarters || $allTenants) {
                array_unshift($totalRow, '', '');
            }
            fputcsv($file, $totalRow);

            fclose($file);
        };

        return response()->stream($callback, 200, $headers);
    }
}