<?php

namespace App\Console\Commands;

use App\Models\BendingItem;
use App\Models\BendingModel;
use App\Models\Commons\File;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Storage;

/**
 * chandj guiderail/bottombar/shutterbox → bending_models 직접 이관
 * + 기존 assembly_image 파일 매핑 보존
 * + component별 이미지 복사 (기초관리 원본 → 독립 복사본)
 *
 * 실행: php artisan bending:model-import [--dry-run] [--tenant_id=287]
 */
class BendingModelImport extends Command
{
    protected $signature = 'bending:model-import
        {--tenant_id=287 : 테넌트 ID}
        {--dry-run : 미리보기}
        {--legacy-path=/tmp/legacy_5130 : 레거시 5130 경로}';

    protected $description = 'chandj 절곡품 모델 3종 → bending_models 이관 (이미지 포함)';

    private int $tenantId;
    private string $legacyPath;
    private array $itemImageMap = [];
    private array $itemIdMap = [];
    private array $modelImageMap = []; // "type:model_name:finishing_type" → image path

    public function handle(): int
    {
        $this->tenantId = (int) $this->option('tenant_id');
        $dryRun = $this->option('dry-run');
        $this->legacyPath = $this->option('legacy-path');

        // 기초관리 이미지 매핑 + 모델 JSON 이미지 로드
        $this->buildItemImageMap();
        $this->loadModelImageJsons();

        // 기존 데이터 삭제 (assembly_image 파일 매핑 보존)
        $existing = BendingModel::where('tenant_id', $this->tenantId)->count();
        $oldFileMap = [];
        if ($existing > 0 && ! $dryRun) {
            $oldFileMap = $this->buildOldFileMap();

            // component_image 삭제 (재생성할 거니까)
            File::where('document_type', 'bending_model')
                ->where('field_key', 'component_image')
                ->whereNull('deleted_at')
                ->forceDelete();

            BendingModel::where('tenant_id', $this->tenantId)->forceDelete();
            $this->info("기존 bending_models {$existing}건 삭제 (component_image 재생성)");
        }

        $total = 0;

        // 1. guiderail
        $guiderails = DB::connection('chandj')->table('guiderail')
            ->where(function ($q) { $q->whereNull('is_deleted')->orWhere('is_deleted', ''); })
            ->orderBy('num')->get();
        $this->info("\n=== 가이드레일: {$guiderails->count()}건 ===");
        foreach ($guiderails as $row) {
            if ($dryRun) { $this->line("  [DRY] #{$row->num} {$row->model_name}"); continue; }
            $this->importModel($row, BendingModel::TYPE_GUIDERAIL, "GR-{$row->num}", $this->buildGuiderailData($row));
            $total++;
        }

        // 2. shutterbox
        $shutterboxes = DB::connection('chandj')->table('shutterbox')
            ->where(function ($q) { $q->whereNull('is_deleted')->orWhere('is_deleted', ''); })
            ->orderBy('num')->get();
        $this->info("\n=== 케이스: {$shutterboxes->count()}건 ===");
        foreach ($shutterboxes as $row) {
            if ($dryRun) { $this->line("  [DRY] #{$row->num} {$row->exit_direction}"); continue; }
            $this->importModel($row, BendingModel::TYPE_SHUTTERBOX, "SB-{$row->num}", $this->buildShutterboxData($row));
            $total++;
        }

        // 3. bottombar
        $bottombars = DB::connection('chandj')->table('bottombar')
            ->where(function ($q) { $q->whereNull('is_deleted')->orWhere('is_deleted', ''); })
            ->orderBy('num')->get();
        $this->info("\n=== 하단마감재: {$bottombars->count()}건 ===");
        foreach ($bottombars as $row) {
            if ($dryRun) { $this->line("  [DRY] #{$row->num} {$row->model_name}"); continue; }
            $this->importModel($row, BendingModel::TYPE_BOTTOMBAR, "BB-{$row->num}", $this->buildBottombarData($row));
            $total++;
        }

        // assembly_image 파일 매핑 업데이트
        if (! $dryRun && ! empty($oldFileMap)) {
            $this->remapAssemblyImages($oldFileMap);
        }

        // 최종 결과
        $this->newLine();
        $final = BendingModel::where('tenant_id', $this->tenantId)->count();
        $assemblyFiles = File::where('document_type', 'bending_model')->where('field_key', 'assembly_image')->whereNull('deleted_at')->count();
        $compFiles = File::where('document_type', 'bending_model')->where('field_key', 'component_image')->whereNull('deleted_at')->count();
        $this->info("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
        $this->info("모델: {$final}건 / 조립도: {$assemblyFiles}건 / 부품이미지: {$compFiles}건");
        $this->info("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");

        return 0;
    }

    private function importModel(object $row, string $type, string $code, array $data): void
    {
        $components = json_decode($row->bending_components ?? '[]', true) ?: [];
        $materialSummary = json_decode($row->material_summary ?? '{}', true) ?: [];

        // component별 이미지 복사
        $components = $this->copyComponentImages($components);

        $bm = BendingModel::create(array_merge($data, [
            'tenant_id' => $this->tenantId,
            'model_type' => $type,
            'code' => $code,
            'legacy_num' => $row->num,
            'components' => $components,
            'material_summary' => $materialSummary,
            'registration_date' => $row->registration_date ?? null,
            'author' => $this->clean($row->author ?? null),
            'remark' => $this->clean($row->remark ?? null),
            'search_keyword' => $this->clean($row->search_keyword ?? null),
            'is_active' => true,
            'created_by' => 1,
        ]));

        // assembly_image 업로드 (JSON 파일에서)
        $this->uploadAssemblyImage($bm, $type, $data);

        $compCount = count($components);
        $imgCount = collect($components)->whereNotNull('image_file_id')->count();
        $hasAssembly = File::where('document_type', 'bending_model')->where('document_id', $bm->id)->where('field_key', 'assembly_image')->exists();
        $this->line("  ✅ #{$row->num} → {$bm->id} ({$data['name']}) [부품:{$compCount} 이미지:{$imgCount} 조립도:" . ($hasAssembly ? 'Y' : 'N') . ']');
    }

    private function copyComponentImages(array $components): array
    {
        foreach ($components as &$comp) {
            $sourceNum = $comp['num'] ?? $comp['source_num'] ?? null;
            if (! $sourceNum) {
                continue;
            }

            // sam_item_id 매핑 (원본수정 링크용)
            $samItemId = $this->itemIdMap[(int) $sourceNum] ?? null;
            if ($samItemId) {
                $comp['sam_item_id'] = $samItemId;
            }

            $sourceFile = $this->itemImageMap[(int) $sourceNum] ?? null;
            if (! $sourceFile || ! $sourceFile->file_path) {
                continue;
            }

            try {
                $extension = pathinfo($sourceFile->stored_name, PATHINFO_EXTENSION);
                $storedName = bin2hex(random_bytes(8)) . '.' . $extension;
                $directory = sprintf('%d/bending/model-parts/%s/%s', $this->tenantId, date('Y'), date('m'));
                $newPath = $directory . '/' . $storedName;

                $content = Storage::disk('r2')->get($sourceFile->file_path);
                Storage::disk('r2')->put($newPath, $content);

                $newFile = File::create([
                    'tenant_id' => $this->tenantId,
                    'display_name' => $sourceFile->display_name,
                    'stored_name' => $storedName,
                    'file_path' => $newPath,
                    'file_size' => $sourceFile->file_size,
                    'mime_type' => $sourceFile->mime_type,
                    'file_type' => 'image',
                    'field_key' => 'component_image',
                    'document_id' => 0, // 모델 생성 전이므로 임시, 나중에 update 불필요 (component JSON에 ID 저장)
                    'document_type' => 'bending_model',
                    'is_temp' => false,
                    'uploaded_by' => 1,
                    'created_by' => 1,
                ]);

                $comp['image_file_id'] = $newFile->id;
            } catch (\Throwable $e) {
                // 복사 실패 시 무시
            }
        }
        unset($comp);

        return $components;
    }

    private function buildItemImageMap(): void
    {
        $items = BendingItem::where('tenant_id', $this->tenantId)
            ->whereNotNull('legacy_bending_id')
            ->get();

        foreach ($items as $bi) {
            $file = File::where('document_type', 'bending_item')
                ->where('document_id', $bi->id)
                ->where('field_key', 'bending_diagram')
                ->whereNull('deleted_at')
                ->first();

            $this->itemIdMap[$bi->legacy_bending_id] = $bi->id;

            if ($file) {
                $this->itemImageMap[$bi->legacy_bending_id] = $file;
            }
        }

        $this->info("기초관리 매핑: " . count($this->itemIdMap) . "건 (이미지: " . count($this->itemImageMap) . "건)");
    }

    private function buildOldFileMap(): array
    {
        return File::where('document_type', 'bending_model')
            ->where('field_key', 'assembly_image')
            ->whereNull('deleted_at')
            ->get()
            ->mapWithKeys(function ($file) {
                $bm = BendingModel::find($file->document_id);
                return $bm ? [$bm->legacy_num => $file->document_id] : [];
            })->toArray();
    }

    private function remapAssemblyImages(array $oldFileMap): void
    {
        $remapped = 0;
        $newModels = BendingModel::where('tenant_id', $this->tenantId)->get()->keyBy('legacy_num');

        foreach ($oldFileMap as $legacyNum => $oldDocId) {
            $newBm = $newModels[$legacyNum] ?? null;
            if ($newBm && $oldDocId !== $newBm->id) {
                File::where('document_type', 'bending_model')
                    ->where('field_key', 'assembly_image')
                    ->where('document_id', $oldDocId)
                    ->whereNull('deleted_at')
                    ->update(['document_id' => $newBm->id]);
                $remapped++;
            }
        }

        $this->info("조립도 매핑 업데이트: {$remapped}건");
    }

    private function loadModelImageJsons(): void
    {
        $jsonFiles = [
            'guiderail' => $this->legacyPath . '/guiderail/guiderail.json',
            'shutterbox' => $this->legacyPath . '/shutterbox/shutterbox.json',
            'bottombar' => $this->legacyPath . '/bottombar/bottombar.json',
        ];

        foreach ($jsonFiles as $type => $path) {
            if (! file_exists($path)) {
                continue;
            }
            $items = json_decode(file_get_contents($path), true) ?: [];
            foreach ($items as $item) {
                $key = $this->makeImageKey($type, $item);
                if ($key && ! empty($item['image'])) {
                    $this->modelImageMap[$key] = $item['image'];
                }
            }
        }

        $this->info("모델 이미지 매핑: " . count($this->modelImageMap) . "건");
    }

    private function makeImageKey(string $type, array $item): ?string
    {
        if ($type === 'guiderail') {
            return "GR:{$item['model_name']}:{$item['check_type']}:{$item['finishing_type']}";
        }
        if ($type === 'shutterbox') {
            return "SB:{$item['exit_direction']}:{$item['box_width']}x{$item['box_height']}";
        }
        if ($type === 'bottombar') {
            return "BB:{$item['model_name']}:{$item['finishing_type']}";
        }
        return null;
    }

    private function uploadAssemblyImage(BendingModel $bm, string $type, array $data): void
    {
        $key = match ($type) {
            BendingModel::TYPE_GUIDERAIL => "GR:{$data['model_name']}:{$data['check_type']}:{$data['finishing_type']}",
            BendingModel::TYPE_SHUTTERBOX => "SB:{$data['exit_direction']}:" . intval($data['box_width'] ?? 0) . 'x' . intval($data['box_height'] ?? 0),
            BendingModel::TYPE_BOTTOMBAR => "BB:{$data['model_name']}:{$data['finishing_type']}",
            default => null,
        };

        if (! $key) return;

        $imagePath = $this->modelImageMap[$key] ?? null;
        if (! $imagePath) return;

        // /bottombar/images/xxx.png → legacy-path/bottombar/images/xxx.png
        $localPath = $this->legacyPath . $imagePath;
        if (! file_exists($localPath)) return;

        try {
            $extension = pathinfo($localPath, PATHINFO_EXTENSION);
            $storedName = bin2hex(random_bytes(8)) . '.' . $extension;
            $directory = sprintf('%d/bending/models/%s/%s', $this->tenantId, date('Y'), date('m'));
            $r2Path = $directory . '/' . $storedName;

            Storage::disk('r2')->put($r2Path, file_get_contents($localPath));

            File::create([
                'tenant_id' => $this->tenantId,
                'display_name' => basename($imagePath),
                'stored_name' => $storedName,
                'file_path' => $r2Path,
                'file_size' => filesize($localPath),
                'mime_type' => mime_content_type($localPath),
                'file_type' => 'image',
                'field_key' => 'assembly_image',
                'document_id' => $bm->id,
                'document_type' => 'bending_model',
                'is_temp' => false,
                'uploaded_by' => 1,
                'created_by' => 1,
            ]);
        } catch (\Throwable $e) {
            $this->warn("  ⚠️ 조립도 업로드 실패: {$bm->name} — {$e->getMessage()}");
        }
    }

    // ── 모델별 데이터 빌드 ──

    private function buildGuiderailData(object $row): array
    {
        return [
            'name' => trim("{$row->model_name} {$row->firstitem} {$row->check_type} {$row->finishing_type}"),
            'model_name' => $this->clean($row->model_name),
            'model_UA' => $this->clean($row->model_UA),
            'item_sep' => $this->clean($row->firstitem),
            'finishing_type' => $this->clean($row->finishing_type),
            'check_type' => $this->clean($row->check_type),
            'rail_width' => $this->toNum($row->rail_width),
            'rail_length' => $this->toNum($row->rail_length),
        ];
    }

    private function buildShutterboxData(object $row): array
    {
        return [
            'name' => trim("케이스 {$row->exit_direction} {$row->box_width}x{$row->box_height}"),
            'exit_direction' => $this->clean($row->exit_direction),
            'front_bottom_width' => $this->toNum($row->front_bottom_width ?? null),
            'rail_width' => $this->toNum($row->rail_width ?? null),
            'box_width' => $this->toNum($row->box_width),
            'box_height' => $this->toNum($row->box_height),
        ];
    }

    private function buildBottombarData(object $row): array
    {
        return [
            'name' => trim("{$row->model_name} {$row->firstitem} {$row->finishing_type} {$row->bar_width}x{$row->bar_height}"),
            'model_name' => $this->clean($row->model_name),
            'model_UA' => $this->clean($row->model_UA),
            'item_sep' => $this->clean($row->firstitem),
            'finishing_type' => $this->clean($row->finishing_type),
            'bar_width' => $this->toNum($row->bar_width),
            'bar_height' => $this->toNum($row->bar_height),
        ];
    }

    private function clean(?string $v): ?string
    {
        return ($v === null || $v === '' || $v === 'null') ? null : trim($v);
    }

    private function toNum(mixed $v): ?float
    {
        return ($v === null || $v === '' || $v === 'null') ? null : (float) $v;
    }
}