<?php

namespace App\Http\Controllers\Api;

use App\Http\Controllers\Controller;
use App\Jobs\PublishPostJob;
use App\Models\Post;
use App\Models\Site;
use App\Models\SocialAccount;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Validator;

class WebhookController extends Controller
{
    /**
     * Create a new post via webhook.
     *
     * POST /api/webhooks/posts
     *
     * Required headers:
     * - X-Muninn-Token: Your webhook token (from .env)
     *
     * Request body:
     * {
     *   "site_name": "My Blog",           // Site name to find the site
     *   "type": "blog",                   // Post type (required)
     *   "title": "Post Title",            // Optional title
     *   "body": "Post content",           // Required
     *   "target": "subreddit-name",      // Optional target (e.g., subreddit)
     *   "image_url": "https://...",       // Optional image URL
     *   "status": "draft",               // Optional status (defaults to draft)
     *   "scheduled_at": "2026-07-28...", // Optional scheduled time
     *   "social_accounts": ["account1", "account2"] // Optional array of social account usernames
     * }
     */
    public function createPost(Request $request)
    {
        // Verify webhook token
        $validToken = config('services.muninn.webhook_token');
        $providedToken = $request->header('X-Muninn-Token');

        if ($validToken && $providedToken !== $validToken) {
            return response()->json([
                'success' => false,
                'error' => 'Invalid or missing webhook token',
            ], 401);
        }

        $validator = Validator::make($request->all(), [
            'type' => ['required', 'string', 'in:' . implode(',', Post::TYPES)],
            'body' => ['required', 'string'],
            'title' => ['nullable', 'string', 'max:255'],
            'target' => ['nullable', 'string', 'max:255'],
            'image_url' => ['nullable', 'url', 'max:2048'],
            'status' => ['nullable', 'string', 'in:' . implode(',', Post::STATUSES)],
            'scheduled_at' => ['nullable', 'date'],
            'site_name' => ['nullable', 'string'],
            'social_accounts' => ['nullable', 'array'],
            'social_accounts.*' => ['string'],
        ]);

        if ($validator->fails()) {
            return response()->json([
                'success' => false,
                'error' => 'Validation failed',
                'errors' => $validator->errors(),
            ], 422);
        }

        $validated = $validator->validated();

        // Find site by name if provided
        $siteId = null;
        if ($validated['site_name'] ?? null) {
            $site = Site::where('name', $validated['site_name'])->first();
            if ($site) {
                $siteId = $site->id;
            }
        }

        // Create the post
        $post = Post::create([
            'site_id' => $siteId,
            'type' => $validated['type'],
            'title' => $validated['title'] ?? null,
            'body' => $validated['body'],
            'target' => $validated['target'] ?? null,
            'image_url' => $validated['image_url'] ?? null,
            'status' => $validated['status'] ?? 'draft',
            'scheduled_at' => $validated['scheduled_at'] ?? null,
        ]);

        // Link social accounts by username if provided
        if ($validated['social_accounts'] ?? null) {
            foreach ($validated['social_accounts'] as $username) {
                $account = SocialAccount::where('username', $username)->first();
                if ($account) {
                    $post->socialAccounts()->attach($account->id);
                }
            }
        }

        return response()->json([
            'success' => true,
            'post' => [
                'id' => $post->id,
                'type' => $post->type,
                'status' => $post->status,
                'created_at' => $post->created_at->toIso8601String(),
            ],
        ], 201);
    }

    /**
     * Trigger publishing for a post via webhook.
     *
     * POST /api/webhooks/posts/{post}/publish
     *
     * Required headers:
     * - X-Muninn-Token: Your webhook token
     */
    public function publishPost(Request $request, Post $post)
    {
        // Verify webhook token
        $validToken = config('services.muninn.webhook_token');
        $providedToken = $request->header('X-Muninn-Token');

        if ($validToken && $providedToken !== $validToken) {
            return response()->json([
                'success' => false,
                'error' => 'Invalid or missing webhook token',
            ], 401);
        }

        // Check if post can be published
        $publisherManager = app(\App\Support\Publishing\PublisherManager::class);
        
        if (! $publisherManager->resolve($post)) {
            return response()->json([
                'success' => false,
                'error' => "No publisher available for post type '{$post->type}'",
            ], 400);
        }

        // Set status to publishing and dispatch job
        $post->update(['status' => 'publishing', 'publish_error' => null]);
        PublishPostJob::dispatch($post->id);

        return response()->json([
            'success' => true,
            'message' => 'Publish job dispatched',
            'post_id' => $post->id,
        ]);
    }

    /**
     * Get post status via webhook.
     *
     * GET /api/webhooks/posts/{post}/status
     *
     * Required headers:
     * - X-Muninn-Token: Your webhook token
     */
    public function getPostStatus(Request $request, Post $post)
    {
        // Verify webhook token
        $validToken = config('services.muninn.webhook_token');
        $providedToken = $request->header('X-Muninn-Token');

        if ($validToken && $providedToken !== $validToken) {
            return response()->json([
                'success' => false,
                'error' => 'Invalid or missing webhook token',
            ], 401);
        }

        return response()->json([
            'success' => true,
            'post' => [
                'id' => $post->id,
                'type' => $post->type,
                'status' => $post->status,
                'title' => $post->title,
                'published_url' => $post->published_url,
                'publish_error' => $post->publish_error,
                'created_at' => $post->created_at->toIso8601String(),
                'updated_at' => $post->updated_at->toIso8601String(),
                'scheduled_at' => $post->scheduled_at?->toIso8601String(),
            ],
        ]);
    }

    /**
     * List posts with optional filters via webhook.
     *
     * GET /api/webhooks/posts
     *
     * Query params:
     * - type: Filter by post type
     * - status: Filter by status
     * - site_id: Filter by site
     * - limit: Limit number of results (default 20)
     *
     * Required headers:
     * - X-Muninn-Token: Your webhook token
     */
    public function listPosts(Request $request)
    {
        // Verify webhook token
        $validToken = config('services.muninn.webhook_token');
        $providedToken = $request->header('X-Muninn-Token');

        if ($validToken && $providedToken !== $validToken) {
            return response()->json([
                'success' => false,
                'error' => 'Invalid or missing webhook token',
            ], 401);
        }

        $query = Post::with(['site', 'socialAccounts'])->orderByDesc('created_at');

        if ($request->has('type')) {
            $query->where('type', $request->input('type'));
        }

        if ($request->has('status')) {
            $query->where('status', $request->input('status'));
        }

        if ($request->has('site_id')) {
            $query->where('site_id', $request->input('site_id'));
        }

        $limit = $request->input('limit', 20);
        $posts = $query->take($limit)->get();

        return response()->json([
            'success' => true,
            'count' => $posts->count(),
            'posts' => $posts->map(fn ($post) => [
                'id' => $post->id,
                'type' => $post->type,
                'status' => $post->status,
                'title' => $post->title,
                'body' => $post->body,
                'published_url' => $post->published_url,
                'publish_error' => $post->publish_error,
                'site' => $post->site ? ['id' => $post->site->id, 'name' => $post->site->name] : null,
                'social_accounts' => $post->socialAccounts->map(fn ($sa) => ['id' => $sa->id, 'username' => $sa->username, 'network' => $sa->network]),
                'created_at' => $post->created_at->toIso8601String(),
                'updated_at' => $post->updated_at->toIso8601String(),
                'scheduled_at' => $post->scheduled_at?->toIso8601String(),
            ]),
        ]);
    }
}