<?php

namespace Modules\Maintenance\Http\Controllers\Api\V1;

use App\Http\Controllers\Controller;
use Modules\Maintenance\Models\ChecklistItem;
use Modules\Maintenance\Models\ChecklistResponse;
use Modules\Maintenance\Models\ChecklistTemplate;
use Modules\Maintenance\Traits\ResolvesBusiness;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class ChecklistController extends Controller
{
    use ResolvesBusiness;

    public function indexTemplates(Request $request)
    {
        $business = $this->resolveBusiness($request);
        if (! $business) {
            return $this->jsonError('کسب‌وکار یافت نشد.', 404);
        }

        $items = ChecklistTemplate::where('business_id', $business->id)
            ->with(['items.sparePart', 'items.equipmentPart', 'equipment:id,name,code', 'category:id,name'])
            ->orderBy('name')
            ->get();

        return $this->jsonSuccess(['items' => $items]);
    }

    public function storeTemplate(Request $request)
    {
        $business = $this->resolveBusiness($request);
        if (! $business) {
            return $this->jsonError('کسب‌وکار یافت نشد.', 404);
        }

        $data = $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'description' => ['nullable', 'string'],
            'equipment_category_id' => ['nullable', 'exists:maintenance_equipment_categories,id'],
            'equipment_id' => ['nullable', 'exists:maintenance_equipment,id'],
            'items' => ['sometimes', 'array'],
            'items.*.label' => ['required_with:items', 'string'],
            'items.*.item_type' => ['sometimes', 'string'],
            'items.*.is_required' => ['sometimes', 'boolean'],
            'items.*.sort_order' => ['sometimes', 'integer'],
            'items.*.spare_part_id' => ['nullable', 'exists:maintenance_spare_parts,id'],
            'items.*.equipment_part_id' => ['nullable', 'exists:maintenance_equipment_parts,id'],
        ]);

        return DB::transaction(function () use ($business, $data) {
            $template = ChecklistTemplate::create([
                'business_id' => $business->id,
                'name' => $data['name'],
                'description' => $data['description'] ?? null,
                'equipment_category_id' => $data['equipment_category_id'] ?? null,
                'equipment_id' => $data['equipment_id'] ?? null,
            ]);

            foreach ($data['items'] ?? [] as $i => $item) {
                ChecklistItem::create([
                    'template_id' => $template->id,
                    'label' => $item['label'],
                    'item_type' => $item['item_type'] ?? 'text',
                    'is_required' => $item['is_required'] ?? true,
                    'sort_order' => $item['sort_order'] ?? $i,
                    'spare_part_id' => $item['spare_part_id'] ?? null,
                    'equipment_part_id' => $item['equipment_part_id'] ?? null,
                ]);
            }

            return $this->jsonSuccess($template->load('items'), 'چک‌لیست ایجاد شد.', 201);
        });
    }

    public function showTemplate(Request $request, ChecklistTemplate $checklist)
    {
        if (! $this->ensureBusinessOwnership($request, $checklist->business_id)) {
            return $this->jsonError('دسترسی ندارید.', 403);
        }

        return $this->jsonSuccess($checklist->load(['items.sparePart', 'items.equipmentPart', 'equipment', 'category']));
    }

    public function updateTemplate(Request $request, ChecklistTemplate $checklist)
    {
        if (! $this->ensureBusinessOwnership($request, $checklist->business_id)) {
            return $this->jsonError('دسترسی ندارید.', 403);
        }

        $data = $request->validate([
            'name' => ['sometimes', 'string', 'max:255'],
            'description' => ['nullable', 'string'],
            'equipment_category_id' => ['nullable', 'exists:maintenance_equipment_categories,id'],
            'equipment_id' => ['nullable', 'exists:maintenance_equipment,id'],
            'is_active' => ['sometimes', 'boolean'],
            'items' => ['sometimes', 'array'],
            'items.*.label' => ['required_with:items', 'string'],
            'items.*.item_type' => ['sometimes', 'string'],
            'items.*.is_required' => ['sometimes', 'boolean'],
            'items.*.sort_order' => ['sometimes', 'integer'],
            'items.*.spare_part_id' => ['nullable', 'exists:maintenance_spare_parts,id'],
            'items.*.equipment_part_id' => ['nullable', 'exists:maintenance_equipment_parts,id'],
        ]);

        return DB::transaction(function () use ($checklist, $data) {
            $checklist->update(collect($data)->except('items')->toArray());

            if (array_key_exists('items', $data)) {
                $checklist->items()->delete();
                foreach ($data['items'] as $i => $item) {
                    ChecklistItem::create([
                        'template_id' => $checklist->id,
                        'label' => $item['label'],
                        'item_type' => $item['item_type'] ?? 'text',
                        'is_required' => $item['is_required'] ?? true,
                        'sort_order' => $item['sort_order'] ?? $i,
                        'spare_part_id' => $item['spare_part_id'] ?? null,
                        'equipment_part_id' => $item['equipment_part_id'] ?? null,
                    ]);
                }
            }

            return $this->jsonSuccess($checklist->fresh()->load('items'), 'چک‌لیست به‌روزرسانی شد.');
        });
    }

    public function destroyTemplate(Request $request, ChecklistTemplate $checklist)
    {
        if (! $this->ensureBusinessOwnership($request, $checklist->business_id)) {
            return $this->jsonError('دسترسی ندارید.', 403);
        }

        $checklist->delete();

        return $this->jsonSuccess(null, 'چک‌لیست حذف شد.');
    }

    public function submitResponse(Request $request)
    {
        $business = $this->resolveBusiness($request);
        if (! $business) {
            return $this->jsonError('کسب‌وکار یافت نشد.', 404);
        }

        $data = $request->validate([
            'template_id' => ['required', 'exists:maintenance_checklist_templates,id'],
            'equipment_id' => ['nullable', 'exists:maintenance_equipment,id'],
            'work_order_id' => ['nullable', 'exists:maintenance_work_orders,id'],
            'responses' => ['required', 'array'],
        ]);

        $response = ChecklistResponse::create([
            'business_id' => $business->id,
            'template_id' => $data['template_id'],
            'equipment_id' => $data['equipment_id'] ?? null,
            'work_order_id' => $data['work_order_id'] ?? null,
            'responses' => $data['responses'],
            'completed_by' => $request->user()?->id,
            'completed_at' => now(),
        ]);

        return $this->jsonSuccess($response->load('template'), 'چک‌لیست ثبت شد.', 201);
    }
}