<?php

namespace App\Http\Resources\Api\V1;

use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

class GuiderailModelResource extends JsonResource
{
    public function toArray(Request $request): array
    {
        $components = $this->components ?? [];
        $materialSummary = $this->material_summary;

        if (empty($materialSummary) && ! empty($components)) {
            $materialSummary = $this->calcMaterialSummary($components);
        }

        return [
            'id' => $this->id,
            'code' => $this->code,
            'name' => $this->name,
            'is_active' => $this->is_active,
            // MNG2 호환
            'item_type' => 'FG',
            'item_category' => $this->model_type,
            // 모델 속성 (정규 컬럼)
            'model_name' => $this->model_name,
            'check_type' => $this->check_type,
            'rail_width' => $this->rail_width ? (int) $this->rail_width : null,
            'rail_length' => $this->rail_length ? (int) $this->rail_length : null,
            'finishing_type' => $this->finishing_type,
            'item_sep' => $this->item_sep,
            'model_UA' => $this->model_UA,
            'search_keyword' => $this->search_keyword,
            'author' => $this->author,
            'memo' => $this->getOption('memo'),
            'registration_date' => $this->registration_date?->format('Y-m-d'),
            // 케이스 전용
            'exit_direction' => $this->exit_direction,
            'front_bottom_width' => $this->front_bottom_width ? (int) $this->front_bottom_width : null,
            'box_width' => $this->box_width ? (int) $this->box_width : null,
            'box_height' => $this->box_height ? (int) $this->box_height : null,
            // 하단마감재 전용
            'bar_width' => $this->bar_width ? (int) $this->bar_width : null,
            'bar_height' => $this->bar_height ? (int) $this->bar_height : null,
            // 수정자
            'modified_by' => $this->getOption('modified_by'),
            // 이미지
            'image_file_id' => $this->getImageFileId(),
            'image_url' => $this->getImageUrl(),
            // 부품 조합
            'components' => $this->enrichComponentsWithImageUrls($components),
            'material_summary' => $materialSummary,
            'component_count' => count($components),
            // 메타
            'created_at' => $this->created_at?->format('Y-m-d H:i:s'),
            'updated_at' => $this->updated_at?->format('Y-m-d H:i:s'),
        ];
    }

    private function getImageFile(): ?\App\Models\Commons\File
    {
        $file = \App\Models\Commons\File::where('document_id', $this->id)
            ->where('document_type', 'bending_model')
            ->where('field_key', 'assembly_image')
            ->whereNull('deleted_at')
            ->orderByDesc('id')
            ->first();

        if (! $file) {
            $file = $this->files()
                ->where('field_key', 'bending_diagram')
                ->orderByDesc('id')
                ->first();
        }

        return $file;
    }

    private function getImageFileId(): ?int
    {
        return $this->getImageFile()?->id;
    }

    private function getImageUrl(): ?string
    {
        return $this->getImageFile()?->presignedUrl();
    }

    private function enrichComponentsWithImageUrls(array $components): array
    {
        $fileIds = array_filter(array_column($components, 'image_file_id'));
        if (empty($fileIds)) {
            return $components;
        }

        $files = \App\Models\Commons\File::whereIn('id', $fileIds)
            ->whereNull('deleted_at')
            ->get()
            ->keyBy('id');

        foreach ($components as &$comp) {
            $fileId = $comp['image_file_id'] ?? null;
            $comp['image_url'] = $fileId && isset($files[$fileId])
                ? $files[$fileId]->presignedUrl()
                : null;
        }
        unset($comp);

        return $components;
    }

    private function calcMaterialSummary(array $components): array
    {
        $summary = [];
        foreach ($components as $comp) {
            $material = $comp['material'] ?? null;
            $widthSum = $comp['widthsum'] ?? $comp['width_sum'] ?? 0;
            $qty = $comp['quantity'] ?? 1;
            if ($material && $widthSum) {
                $summary[$material] = ($summary[$material] ?? 0) + ($widthSum * $qty);
            }
        }
        return $summary;
    }
}