<?php

namespace App\Http\Controllers;

use Barryvdh\DomPDF\Facade\Pdf;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Http;
use Illuminate\View\View;

class BendingProductController extends Controller
{
    private const TYPE_CONFIG = [
        'GUIDERAIL_MODEL' => ['title' => '절곡품 (가이드레일)', 'prefix' => 'products', 'label' => '가이드레일'],
        'SHUTTERBOX_MODEL' => ['title' => '케이스 관리', 'prefix' => 'cases', 'label' => '케이스'],
        'BOTTOMBAR_MODEL' => ['title' => '하단마감재 관리', 'prefix' => 'bottombars', 'label' => '하단마감재'],
    ];

    private function api(): \Illuminate\Http\Client\PendingRequest
    {
        $baseUrl = config('services.api.base_url', 'https://api.sam.kr');
        $token = session('api_access_token', '');

        return Http::baseUrl($baseUrl)
            ->withoutVerifying()
            ->withHeaders([
                'X-API-KEY' => config('services.api.key') ?: '42Jfwc6EaRQ04GNRmLR5kzJp5UudSOzGGqjmdk1a',
                'X-TENANT-ID' => session('selected_tenant_id', 1),
            ])
            ->withToken($token)
            ->timeout(10);
    }

    private function getConfig(string $category): array
    {
        return self::TYPE_CONFIG[$category] ?? self::TYPE_CONFIG['GUIDERAIL_MODEL'];
    }

    public function index(Request $request, string $category = 'GUIDERAIL_MODEL'): View|\Illuminate\Http\Response
    {
        $config = $this->getConfig($category);
        $params = $request->only(['item_sep', 'model_UA', 'check_type', 'model_name', 'exit_direction', 'search', 'page', 'size']);
        $params['size'] = $params['size'] ?? 30;
        $params['item_category'] = $category;

        $response = $this->api()->get('/api/v1/guiderail-models', $params);
        $body = $response->successful() ? $response->json('data', []) : [];
        $data = [
            'data' => $body['data'] ?? [],
            'total' => $body['total'] ?? 0,
            'current_page' => $body['current_page'] ?? 1,
            'last_page' => $body['last_page'] ?? 1,
        ];


        $filterResponse = $this->api()->get('/api/v1/guiderail-models/filters');
        $filterOptions = $filterResponse->successful() ? $filterResponse->json('data', []) : [];

        if ($request->header('HX-Request')) {
            // 필터/검색 HTMX (hx-target="#items-table") → 파셜 반환
            if ($request->header('HX-Target') === 'items-table') {
                return view('bending.products.partials.table', ['items' => $data, 'config' => $config, 'category' => $category]);
            }
            // 사이드바 등 그 외 HTMX → 전체 페이지 리로드
            return response('', 200)->header('HX-Redirect', route("bending.{$config['prefix']}.index", $request->query()));
        }

        return view('bending.products.index', [
            'items' => $data,
            'filterOptions' => $filterOptions,
            'config' => $config,
            'category' => $category,
        ]);
    }

    public function show(int $id): View
    {
        $response = $this->api()->get("/api/v1/guiderail-models/{$id}");
        $item = $response->successful() ? $response->json('data') : null;
        abort_unless($item, 404);

        $item = $this->enrichComponentsWithSamIds($item);
        $config = $this->getConfig($item['item_category'] ?? 'GUIDERAIL_MODEL');
        $imageFile = $this->getImageFile($id, $item['image_file_id'] ?? null);

        return view('bending.products.form', ['item' => $item, 'mode' => 'view', 'config' => $config, 'imageFile' => $imageFile]);
    }

    public function create(string $category = 'GUIDERAIL_MODEL'): View
    {
        $config = $this->getConfig($category);

        return view('bending.products.form', ['item' => null, 'mode' => 'create', 'config' => $config, 'category' => $category, 'imageFile' => null]);
    }

    public function edit(int $id): View
    {
        $response = $this->api()->get("/api/v1/guiderail-models/{$id}");
        $item = $response->successful() ? $response->json('data') : null;
        abort_unless($item, 404);

        $item = $this->enrichComponentsWithSamIds($item);
        $config = $this->getConfig($item['item_category'] ?? 'GUIDERAIL_MODEL');
        $imageFile = $this->getImageFile($id, $item['image_file_id'] ?? null);

        return view('bending.products.form', ['item' => $item, 'mode' => 'edit', 'config' => $config, 'imageFile' => $imageFile]);
    }

    public function store(Request $request, string $category = 'GUIDERAIL_MODEL')
    {
        $config = $this->getConfig($category);

        if ($category === 'SHUTTERBOX_MODEL') {
            $rules = [
                'exit_direction' => 'required|string',
                'box_width' => 'required|numeric',
                'box_height' => 'required|numeric',
            ];
            $messages = [
                'exit_direction.required' => '점검구 방향을 선택하세요.',
                'box_width.required' => '가로(폭)를 입력하세요.',
                'box_height.required' => '세로(높이)를 입력하세요.',
            ];
        } else {
            $rules = [
                'item_sep' => 'required|string|max:20',
                'model_name' => 'required|string|max:50',
            ];
            $messages = [
                'item_sep.required' => '대분류를 선택하세요.',
                'model_name.required' => '모델을 선택하세요.',
            ];
        }

        $request->validate($rules, $messages);

        $data = $this->prepareApiData($request);
        $response = $this->api()->post('/api/v1/guiderail-models', $data);

        if ($response->successful()) {
            $itemId = $response->json('data.id');

            if ($itemId) {
                $this->handleImageUpload($request, $itemId);
            }

            if ($itemId && $request->input('_redirect') === 'edit') {
                return redirect()->route("bending.{$config['prefix']}.edit", $itemId)->with('success', '등록 후 편집 모드로 전환되었습니다.');
            }

            return redirect()->route("bending.{$config['prefix']}.index")->with('success', "{$config['label']} 모델이 등록되었습니다.");
        }

        $body = $response->json();
        $apiErrors = $body['errors'] ?? $body['error']['details'] ?? $body['data']['errors'] ?? [];
        $apiMessage = $body['message'] ?? 'API 오류';
        $errorBag = ['api' => "[{$response->status()}] {$apiMessage}"];
        foreach ($apiErrors as $field => $msgs) {
            $errorBag["api_{$field}"] = "[{$field}] " . (is_array($msgs) ? implode(', ', $msgs) : $msgs);
        }
        return back()->withErrors($errorBag)->withInput();
    }

    public function update(Request $request, int $id)
    {
        $category = $request->input('item_category', 'GUIDERAIL_MODEL');

        if ($category === 'SHUTTERBOX_MODEL') {
            $rules = [
                'exit_direction' => 'required|string',
                'box_width' => 'required|numeric',
                'box_height' => 'required|numeric',
            ];
            $messages = [
                'exit_direction.required' => '점검구 방향을 선택하세요.',
                'box_width.required' => '가로(폭)를 입력하세요.',
                'box_height.required' => '세로(높이)를 입력하세요.',
            ];
        } else {
            $rules = [
                'item_sep' => 'required|string|max:20',
                'model_name' => 'required|string|max:50',
            ];
            $messages = [
                'item_sep.required' => '대분류를 선택하세요.',
                'model_name.required' => '모델을 선택하세요.',
            ];
        }

        $request->validate($rules, $messages);

        $data = $this->prepareApiData($request);
        $response = $this->api()->put("/api/v1/guiderail-models/{$id}", $data);

        if ($response->successful()) {
            $item = $response->json('data');
            $config = $this->getConfig($item['item_category'] ?? 'GUIDERAIL_MODEL');

            $this->handleImageUpload($request, $id);

            if ($request->input('_redirect') === 'edit') {
                return redirect()->route("bending.{$config['prefix']}.edit", $id)->with('success', '저장되었습니다.');
            }

            return redirect()->route("bending.{$config['prefix']}.show", $id)->with('success', "{$config['label']} 모델이 수정되었습니다.");
        }

        $body = $response->json();
        $apiErrors = $body['errors'] ?? $body['error']['details'] ?? $body['data']['errors'] ?? [];
        $apiMessage = $body['message'] ?? 'API 오류';
        $errorBag = ['api' => "[{$response->status()}] {$apiMessage}"];
        foreach ($apiErrors as $field => $msgs) {
            $errorBag["api_{$field}"] = "[{$field}] " . (is_array($msgs) ? implode(', ', $msgs) : $msgs);
        }
        return back()->withErrors($errorBag)->withInput();
    }

    public function destroy(Request $request, int $id)
    {
        $response = $this->api()->get("/api/v1/guiderail-models/{$id}");
        $item = $response->successful() ? $response->json('data') : null;
        $config = $this->getConfig($item['item_category'] ?? 'GUIDERAIL_MODEL');

        $this->api()->delete("/api/v1/guiderail-models/{$id}");

        return redirect()->route("bending.{$config['prefix']}.index")->with('success', "{$config['label']} 모델이 삭제되었습니다.");
    }

    public function print(Request $request, int $id)
    {
        $response = $this->api()->get("/api/v1/guiderail-models/{$id}");
        $item = $response->successful() ? $response->json('data') : null;
        abort_unless($item, 404);

        return view('bending.products.print', ['item' => $item]);
    }

    public function searchBendingItems(Request $request)
    {
        $params = $request->only(['item_sep', 'item_bending', 'material', 'search', 'legacy_bending_num', 'size']);
        $params['size'] = $params['size'] ?? 100;

        $response = $this->api()->get('/api/v1/bending-items', $params);
        $body = $response->successful() ? $response->json('data', []) : [];

        return response()->json([
            'data' => $body['data'] ?? [],
            'total' => $body['total'] ?? 0,
        ]);
    }

    private function enrichComponentsWithSamIds(array $item): array
    {
        if (empty($item['components'])) {
            return $item;
        }

        $legacyNums = array_filter(array_column($item['components'], 'legacy_bending_num'));
        if (empty($legacyNums)) {
            return $item;
        }

        $response = $this->api()->get('/api/v1/bending-items', ['size' => 200]);
        $allItems = $response->successful() ? ($response->json('data.data') ?? []) : [];

        $numToId = [];
        foreach ($allItems as $samItem) {
            $lbn = $samItem['legacy_bending_num'] ?? null;
            if ($lbn !== null) {
                $numToId[(string) $lbn] = $samItem['id'];
            }
        }

        foreach ($item['components'] as &$comp) {
            $lbn = $comp['legacy_bending_num'] ?? null;
            $comp['sam_item_id'] = $lbn !== null ? ($numToId[(string) $lbn] ?? null) : null;
        }
        unset($comp);

        return $item;
    }

    private function getImageFile(int $itemId, ?int $imageFileId = null): ?array
    {
        // API Resource에서 image_file_id를 이미 반환 → 그대로 사용
        if ($imageFileId) {
            return ['id' => $imageFileId];
        }

        // fallback: fileable 기반 조회
        $response = $this->api()->get("/api/v1/items/{$itemId}/files", ['field_key' => 'bending_diagram']);
        if ($response->successful()) {
            $files = $response->json('data.bending_diagram', []);
            if (! empty($files)) {
                return $files[0];
            }
        }

        return null;
    }

    private function uploadImage(int $itemId, \Illuminate\Http\UploadedFile $file): ?array
    {
        $existing = $this->getImageFile($itemId);

        $postData = ['field_key' => 'bending_diagram'];
        if ($existing) {
            $postData['file_id'] = $existing['id'];
        }

        $response = $this->api()
            ->attach('file', $file->getContent(), $file->getClientOriginalName())
            ->post("/api/v1/items/{$itemId}/files", $postData);

        if (! $response->successful()) {
            \Log::error('Model image upload failed', [
                'itemId' => $itemId,
                'status' => $response->status(),
                'body' => $response->json(),
            ]);
        }

        return $response->successful() ? $response->json('data') : null;
    }

    private function handleImageUpload(Request $request, int $itemId): void
    {
        if ($request->hasFile('image')) {
            $this->uploadImage($itemId, $request->file('image'));
        } elseif ($request->filled('canvas_image')) {
            $this->uploadCanvasImage($itemId, $request->input('canvas_image'));
        }
    }

    private function uploadCanvasImage(int $itemId, string $dataURL): ?array
    {
        if (! preg_match('/^data:image\/(\w+);base64,/', $dataURL, $matches)) {
            return null;
        }

        $ext = $matches[1] === 'jpeg' ? 'jpg' : $matches[1];
        $binary = base64_decode(substr($dataURL, strpos($dataURL, ',') + 1));

        if ($binary === false) {
            return null;
        }

        $tmpPath = tempnam(sys_get_temp_dir(), 'canvas_') . '.' . $ext;
        file_put_contents($tmpPath, $binary);

        try {
            $file = new \Illuminate\Http\UploadedFile($tmpPath, "canvas.{$ext}", "image/{$ext}", null, true);

            return $this->uploadImage($itemId, $file);
        } finally {
            @unlink($tmpPath);
        }
    }

    private function prepareApiData(Request $request): array
    {
        $data = $request->except(['_token', '_method', '_redirect', 'image', 'canvas_image']);

        if (isset($data['components']) && is_string($data['components'])) {
            $decoded = json_decode($data['components'], true);
            $data['components'] = is_array($decoded) ? $decoded : null;
        }
        if (isset($data['material_summary']) && is_string($data['material_summary'])) {
            $decoded = json_decode($data['material_summary'], true);
            $data['material_summary'] = is_array($decoded) ? $decoded : null;
        }

        // 빈 문자열도 전송 (기존 값 삭제 가능하도록) — null만 제거
        $data = array_filter($data, fn ($v) => $v !== null);

        if (empty($data['code'])) {
            $modelName = $data['model_name'] ?? '';
            $itemSep = $data['item_sep'] ?? '';
            $data['code'] = trim("{$itemSep}_{$modelName}_" . date('ymd_His'));
        }
        if (empty($data['name'])) {
            $data['name'] = $data['model_name'] ?? $data['code'];
        }

        return $data;
    }
}