<?php
// ============================================================
// marketing_engine/services/ContentWorkflow.php
// Orchestrates the entire content generation pipeline
// ============================================================

require_once __DIR__ . '/AIVideoGenerator.php';
require_once __DIR__ . '/../../core/bootstrap.php';

class ContentWorkflow {
    private $generator;
    private $con;

    public function __construct() {
        $this->generator = new AIVideoGenerator();
        $this->con = Database::get('main');
    }

    /**
     * Executes the next pending step in the content pipeline
     */
    public function processPipeline() {
        // 1. Check for pending topics to generate scripts
        $this->processPendingScripts();
        
        // 2. Check for generated scripts to create voice
        $this->processPendingVoices();
        
        // 3. Check for generated voices to render video
        $this->processPendingVideos();
        
        // 4. Check for rendered videos to queue marketing tasks
        $this->queueUploadTasks();
    }

    private function processPendingScripts() {
        $stmt = $this->con->prepare("SELECT * FROM content_pipeline WHERE status = 'pending' LIMIT 1");
        $stmt->execute();
        $job = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if ($job) {
            $result = $this->generator->generateScript($job['topic']);
            if ($result['status'] === 'success') {
                $update = $this->con->prepare("UPDATE content_pipeline SET script_text = ?, status = 'script_generated' WHERE id = ?");
                $update->execute([$result['script'], $job['id']]);
            }
        }
    }

    private function processPendingVoices() {
        $stmt = $this->con->prepare("SELECT * FROM content_pipeline WHERE status = 'script_generated' LIMIT 1");
        $stmt->execute();
        $job = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if ($job) {
            $result = $this->generator->generateVoice($job['script_text']);
            if ($result['status'] === 'success') {
                $update = $this->con->prepare("UPDATE content_pipeline SET voice_url = ?, status = 'voice_generated' WHERE id = ?");
                $update->execute([$result['audio_url'], $job['id']]);
            }
        }
    }

    private function processPendingVideos() {
        $stmt = $this->con->prepare("SELECT * FROM content_pipeline WHERE status = 'voice_generated' LIMIT 1");
        $stmt->execute();
        $job = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if ($job) {
            $result = $this->generator->renderVideo($job['script_text'], $job['voice_url']);
            if ($result['status'] === 'success') {
                $update = $this->con->prepare("UPDATE content_pipeline SET video_url = ?, status = 'video_rendered' WHERE id = ?");
                $update->execute([$result['video_url'], $job['id']]);
            }
        }
    }

    private function queueUploadTasks() {
        $stmt = $this->con->prepare("SELECT * FROM content_pipeline WHERE status = 'video_rendered' LIMIT 1");
        $stmt->execute();
        $job = $stmt->fetch(PDO::FETCH_ASSOC);
        
        if ($job) {
            // Create upload tasks for TikTok and YouTube Shorts
            $insert = $this->con->prepare("
                INSERT INTO marketing_tasks (platform, type, content_text, media_url, status) 
                VALUES 
                ('tiktok', 'upload_video', ?, ?, 'pending'),
                ('youtube', 'upload_video', ?, ?, 'pending')
            ");
            
            // Provide a short caption based on the script
            $caption = substr($job['script_text'], 0, 100) . "... #Siro #RideHailing";
            
            $insert->execute([
                $caption, $job['video_url'],
                $caption, $job['video_url']
            ]);
            
            // Mark job as published (or handed off to bots)
            $update = $this->con->prepare("UPDATE content_pipeline SET status = 'published' WHERE id = ?");
            $update->execute([$job['id']]);
        }
    }
}