<?php

namespace App\Http\Controllers\Api\Admin;

use App\Http\Controllers\Controller;
use App\Models\DocumentTemplate;
use App\Models\DocumentTemplateApprovalLine;
use App\Models\DocumentTemplateBasicField;
use App\Models\DocumentTemplateColumn;
use App\Models\DocumentTemplateSection;
use App\Models\DocumentTemplateSectionItem;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\View\View;

class DocumentTemplateApiController extends Controller
{
    /**
     * 목록 조회 (HTMX 테이블)
     */
    public function index(Request $request): View
    {
        $query = DocumentTemplate::query()
            ->withCount(['sections', 'columns']);

        // 검색
        if ($search = $request->input('search')) {
            $query->where(function ($q) use ($search) {
                $q->where('name', 'like', "%{$search}%")
                    ->orWhere('title', 'like', "%{$search}%")
                    ->orWhere('category', 'like', "%{$search}%");
            });
        }

        // 카테고리 필터
        if ($category = $request->input('category')) {
            $query->where('category', $category);
        }

        // 활성 상태 필터
        if ($request->has('is_active') && $request->input('is_active') !== '') {
            $query->where('is_active', $request->boolean('is_active'));
        }

        $templates = $query->orderBy('updated_at', 'desc')
            ->paginate($request->input('per_page', 10));

        return view('document-templates.partials.table', compact('templates'));
    }

    /**
     * 단일 조회
     */
    public function show(int $id): JsonResponse
    {
        $template = DocumentTemplate::with([
            'approvalLines',
            'basicFields',
            'sections.items',
            'columns',
        ])->findOrFail($id);

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

    /**
     * 생성
     */
    public function store(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'name' => 'required|string|max:100',
            'category' => 'nullable|string|max:50',
            'title' => 'nullable|string|max:200',
            'company_name' => 'nullable|string|max:100',
            'company_address' => 'nullable|string|max:255',
            'company_contact' => 'nullable|string|max:100',
            'footer_remark_label' => 'nullable|string|max:50',
            'footer_judgement_label' => 'nullable|string|max:50',
            'footer_judgement_options' => 'nullable|array',
            'is_active' => 'boolean',
            // 관계 데이터
            'approval_lines' => 'nullable|array',
            'basic_fields' => 'nullable|array',
            'sections' => 'nullable|array',
            'columns' => 'nullable|array',
        ]);

        try {
            DB::beginTransaction();

            $template = DocumentTemplate::create([
                'tenant_id' => session('selected_tenant_id'),
                'name' => $validated['name'],
                'category' => $validated['category'] ?? null,
                'title' => $validated['title'] ?? null,
                'company_name' => $validated['company_name'] ?? '경동기업',
                'company_address' => $validated['company_address'] ?? null,
                'company_contact' => $validated['company_contact'] ?? null,
                'footer_remark_label' => $validated['footer_remark_label'] ?? '부적합 내용',
                'footer_judgement_label' => $validated['footer_judgement_label'] ?? '종합판정',
                'footer_judgement_options' => $validated['footer_judgement_options'] ?? ['적합', '부적합'],
                'is_active' => $validated['is_active'] ?? true,
            ]);

            // 관계 데이터 저장
            $this->saveRelations($template, $validated);

            DB::commit();

            return response()->json([
                'success' => true,
                'message' => '문서양식이 생성되었습니다.',
                'data' => $template->load(['approvalLines', 'basicFields', 'sections.items', 'columns']),
            ]);
        } catch (\Exception $e) {
            DB::rollBack();

            return response()->json([
                'success' => false,
                'message' => '생성 중 오류가 발생했습니다: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * 수정
     */
    public function update(Request $request, int $id): JsonResponse
    {
        $template = DocumentTemplate::findOrFail($id);

        $validated = $request->validate([
            'name' => 'required|string|max:100',
            'category' => 'nullable|string|max:50',
            'title' => 'nullable|string|max:200',
            'company_name' => 'nullable|string|max:100',
            'company_address' => 'nullable|string|max:255',
            'company_contact' => 'nullable|string|max:100',
            'footer_remark_label' => 'nullable|string|max:50',
            'footer_judgement_label' => 'nullable|string|max:50',
            'footer_judgement_options' => 'nullable|array',
            'is_active' => 'boolean',
            // 관계 데이터
            'approval_lines' => 'nullable|array',
            'basic_fields' => 'nullable|array',
            'sections' => 'nullable|array',
            'columns' => 'nullable|array',
        ]);

        try {
            DB::beginTransaction();

            $template->update([
                'name' => $validated['name'],
                'category' => $validated['category'] ?? null,
                'title' => $validated['title'] ?? null,
                'company_name' => $validated['company_name'] ?? null,
                'company_address' => $validated['company_address'] ?? null,
                'company_contact' => $validated['company_contact'] ?? null,
                'footer_remark_label' => $validated['footer_remark_label'] ?? '부적합 내용',
                'footer_judgement_label' => $validated['footer_judgement_label'] ?? '종합판정',
                'footer_judgement_options' => $validated['footer_judgement_options'] ?? ['적합', '부적합'],
                'is_active' => $validated['is_active'] ?? true,
            ]);

            // 관계 데이터 저장 (기존 데이터 삭제 후 재생성)
            $this->saveRelations($template, $validated, true);

            DB::commit();

            return response()->json([
                'success' => true,
                'message' => '문서양식이 수정되었습니다.',
                'data' => $template->fresh(['approvalLines', 'basicFields', 'sections.items', 'columns']),
            ]);
        } catch (\Exception $e) {
            DB::rollBack();

            return response()->json([
                'success' => false,
                'message' => '수정 중 오류가 발생했습니다: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * 삭제
     */
    public function destroy(int $id): JsonResponse
    {
        $template = DocumentTemplate::findOrFail($id);
        $template->delete();

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

    /**
     * 활성 상태 토글
     */
    public function toggleActive(int $id): JsonResponse
    {
        $template = DocumentTemplate::findOrFail($id);
        $template->update(['is_active' => ! $template->is_active]);

        return response()->json([
            'success' => true,
            'message' => $template->is_active ? '활성화되었습니다.' : '비활성화되었습니다.',
            'is_active' => $template->is_active,
        ]);
    }

    /**
     * 양식 복제
     */
    public function duplicate(Request $request, int $id): JsonResponse
    {
        $source = DocumentTemplate::with([
            'approvalLines',
            'basicFields',
            'sections.items',
            'columns',
        ])->findOrFail($id);

        $newName = $request->input('name', $source->name.' (복사)');

        try {
            DB::beginTransaction();

            $newTemplate = DocumentTemplate::create([
                'tenant_id' => $source->tenant_id,
                'name' => $newName,
                'category' => $source->category,
                'title' => $source->title,
                'company_name' => $source->company_name,
                'company_address' => $source->company_address,
                'company_contact' => $source->company_contact,
                'footer_remark_label' => $source->footer_remark_label,
                'footer_judgement_label' => $source->footer_judgement_label,
                'footer_judgement_options' => $source->footer_judgement_options,
                'is_active' => false,
            ]);

            foreach ($source->approvalLines as $line) {
                DocumentTemplateApprovalLine::create([
                    'template_id' => $newTemplate->id,
                    'name' => $line->name,
                    'dept' => $line->dept,
                    'role' => $line->role,
                    'sort_order' => $line->sort_order,
                ]);
            }

            foreach ($source->basicFields as $field) {
                DocumentTemplateBasicField::create([
                    'template_id' => $newTemplate->id,
                    'label' => $field->label,
                    'field_type' => $field->field_type,
                    'default_value' => $field->default_value,
                    'sort_order' => $field->sort_order,
                ]);
            }

            foreach ($source->sections as $section) {
                $newSection = DocumentTemplateSection::create([
                    'template_id' => $newTemplate->id,
                    'title' => $section->title,
                    'image_path' => $section->image_path,
                    'sort_order' => $section->sort_order,
                ]);

                foreach ($section->items as $item) {
                    DocumentTemplateSectionItem::create([
                        'section_id' => $newSection->id,
                        'category' => $item->category,
                        'item' => $item->item,
                        'standard' => $item->standard,
                        'tolerance' => $item->tolerance,
                        'method' => $item->method,
                        'measurement_type' => $item->measurement_type,
                        'frequency' => $item->frequency,
                        'regulation' => $item->regulation,
                        'sort_order' => $item->sort_order,
                    ]);
                }
            }

            foreach ($source->columns as $col) {
                DocumentTemplateColumn::create([
                    'template_id' => $newTemplate->id,
                    'label' => $col->label,
                    'width' => $col->width,
                    'column_type' => $col->column_type,
                    'group_name' => $col->group_name,
                    'sub_labels' => $col->sub_labels,
                    'sort_order' => $col->sort_order,
                ]);
            }

            DB::commit();

            return response()->json([
                'success' => true,
                'message' => "'{$newName}' 양식이 복제되었습니다.",
                'data' => $newTemplate->load(['approvalLines', 'basicFields', 'sections.items', 'columns']),
            ]);
        } catch (\Exception $e) {
            DB::rollBack();

            return response()->json([
                'success' => false,
                'message' => '복제 중 오류가 발생했습니다: '.$e->getMessage(),
            ], 500);
        }
    }

    /**
     * 이미지 업로드
     */
    public function uploadImage(Request $request): JsonResponse
    {
        $request->validate([
            'image' => 'required|image|max:5120', // 5MB
        ]);

        $path = $request->file('image')->store('document-templates', 'public');

        return response()->json([
            'success' => true,
            'path' => $path,
            'url' => asset('storage/'.$path),
        ]);
    }

    /**
     * 공통코드 그룹 조회 (JSON)
     */
    public function getCommonCodes(string $group): JsonResponse
    {
        $tenantId = session('selected_tenant_id');

        $codes = \App\Models\Products\CommonCode::query()
            ->where('code_group', $group)
            ->where('is_active', true)
            ->where(function ($q) use ($tenantId) {
                $q->whereNull('tenant_id');
                if ($tenantId) {
                    $q->orWhere('tenant_id', $tenantId);
                }
            })
            ->orderBy('sort_order')
            ->get(['code', 'name']);

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

    /**
     * 관계 데이터 저장
     */
    private function saveRelations(DocumentTemplate $template, array $data, bool $deleteExisting = false): void
    {
        // 기존 데이터 삭제 (수정 시)
        if ($deleteExisting) {
            $template->approvalLines()->delete();
            $template->basicFields()->delete();
            // sections는 cascade로 items도 함께 삭제됨
            $template->sections()->delete();
            $template->columns()->delete();
        }

        // 결재라인
        if (! empty($data['approval_lines'])) {
            foreach ($data['approval_lines'] as $index => $line) {
                DocumentTemplateApprovalLine::create([
                    'template_id' => $template->id,
                    'name' => $line['name'] ?? '',
                    'dept' => $line['dept'] ?? '',
                    'role' => $line['role'] ?? '',
                    'sort_order' => $index,
                ]);
            }
        }

        // 기본 필드
        if (! empty($data['basic_fields'])) {
            foreach ($data['basic_fields'] as $index => $field) {
                DocumentTemplateBasicField::create([
                    'template_id' => $template->id,
                    'label' => $field['label'] ?? '',
                    'field_type' => $field['field_type'] ?? 'text',
                    'default_value' => $field['default_value'] ?? '',
                    'sort_order' => $index,
                ]);
            }
        }

        // 섹션 및 항목
        if (! empty($data['sections'])) {
            foreach ($data['sections'] as $sIndex => $section) {
                $newSection = DocumentTemplateSection::create([
                    'template_id' => $template->id,
                    'title' => $section['title'] ?? '',
                    'image_path' => $section['image_path'] ?? null,
                    'sort_order' => $sIndex,
                ]);

                if (! empty($section['items'])) {
                    foreach ($section['items'] as $iIndex => $item) {
                        DocumentTemplateSectionItem::create([
                            'section_id' => $newSection->id,
                            'category' => $item['category'] ?? '',
                            'item' => $item['item'] ?? '',
                            'standard' => $item['standard'] ?? '',
                            'tolerance' => $item['tolerance'] ?? null,
                            'method' => $item['method'] ?? '',
                            'measurement_type' => $item['measurement_type'] ?? null,
                            'frequency' => $item['frequency'] ?? '',
                            'regulation' => $item['regulation'] ?? '',
                            'sort_order' => $iIndex,
                        ]);
                    }
                }
            }
        }

        // 컬럼
        if (! empty($data['columns'])) {
            foreach ($data['columns'] as $index => $column) {
                DocumentTemplateColumn::create([
                    'template_id' => $template->id,
                    'label' => $column['label'] ?? '',
                    'width' => $column['width'] ?? '100px',
                    'column_type' => $column['column_type'] ?? 'text',
                    'group_name' => $column['group_name'] ?? null,
                    'sub_labels' => $column['sub_labels'] ?? null,
                    'sort_order' => $index,
                ]);
            }
        }
    }
}