<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Models\SalesScript;
use App\Services\ActivityLogger;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;

class ScriptController extends Controller
{
    public function index(): JsonResponse
    {
        return response()->json(
            SalesScript::with('sections', 'campaign:id,name')
                ->orderBy('created_at', 'desc')
                ->paginate(15)
        );
    }

    public function store(Request $request): JsonResponse
    {
        $validated = $request->validate([
            'title' => 'required|string|max:255',
            'description' => 'nullable|string',
            'campaign_id' => 'nullable|exists:campaigns,id',
            'product_id' => 'nullable|exists:products,id',
            'version' => 'nullable|string|max:20',
            'checklist' => 'nullable|array',
            'objection_handling' => 'nullable|array',
            'sections' => 'nullable|array',
            'sections.*.title' => 'required|string|max:255',
            'sections.*.content' => 'required|string',
            'sections.*.sort_order' => 'nullable|integer',
        ]);

        $script = SalesScript::create([
            'title' => $validated['title'],
            'description' => $validated['description'] ?? null,
            'campaign_id' => $validated['campaign_id'] ?? null,
            'product_id' => $validated['product_id'] ?? null,
            'version' => $validated['version'] ?? '1.0',
            'is_active' => true,
            'checklist' => $validated['checklist'] ?? null,
            'objection_handling' => $validated['objection_handling'] ?? null,
        ]);

        if ($request->sections) {
            foreach ($validated['sections'] as $i => $section) {
                $script->sections()->create([
                    'title' => $section['title'],
                    'content' => $section['content'],
                    'sort_order' => $section['sort_order'] ?? $i,
                ]);
            }
        }

        ActivityLogger::log('script_created', "Script {$script->title} created", $script);

        return response()->json($script->load('sections'), 201);
    }

    public function show(SalesScript $script): JsonResponse
    {
        return response()->json($script->load('sections', 'campaign'));
    }

    public function update(Request $request, SalesScript $script): JsonResponse
    {
        $validated = $request->validate([
            'title' => 'sometimes|string|max:255',
            'description' => 'nullable|string',
            'campaign_id' => 'nullable|exists:campaigns,id',
            'product_id' => 'nullable|exists:products,id',
            'version' => 'nullable|string|max:20',
            'is_active' => 'nullable|boolean',
            'checklist' => 'nullable|array',
            'objection_handling' => 'nullable|array',
            'sections' => 'nullable|array',
            'sections.*.id' => 'nullable|exists:script_sections,id',
            'sections.*.title' => 'required|string|max:255',
            'sections.*.content' => 'required|string',
            'sections.*.sort_order' => 'nullable|integer',
        ]);

        $script->update($validated);

        if ($request->has('sections')) {
            $existingIds = $script->sections->pluck('id')->toArray();
            $updatedIds = [];

            foreach ($validated['sections'] as $i => $section) {
                if (isset($section['id']) && in_array($section['id'], $existingIds)) {
                    $script->sections()->where('id', $section['id'])->update([
                        'title' => $section['title'],
                        'content' => $section['content'],
                        'sort_order' => $section['sort_order'] ?? $i,
                    ]);
                    $updatedIds[] = $section['id'];
                } else {
                    $newSection = $script->sections()->create([
                        'title' => $section['title'],
                        'content' => $section['content'],
                        'sort_order' => $section['sort_order'] ?? $i,
                    ]);
                    $updatedIds[] = $newSection->id;
                }
            }

            $toDelete = array_diff($existingIds, $updatedIds);
            if (!empty($toDelete)) {
                $script->sections()->whereIn('id', $toDelete)->delete();
            }
        }

        ActivityLogger::log('script_updated', "Script {$script->title} updated", $script);

        return response()->json($script->load('sections'));
    }

    public function destroy(SalesScript $script): JsonResponse
    {
        $script->delete();
        ActivityLogger::log('script_deleted', "Script {$script->title} deleted");
        return response()->json(['message' => 'اسکریپت حذف شد']);
    }
}