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<?php namespace App\Services\AiWebsite\CourseManagement; use App\Models\User\CourseManagement\Course; use App\Models\User\CourseManagement\CourseCategory; use App\Models\User\CourseManagement\CourseInformation; use App\Models\User\Language; use App\Models\User\CourseManagement\Instructor\Instructor; use App\Services\MasterAiGenerator; use Illuminate\Support\Str; class CourseService { protected $ai; protected $thumbPath = 'assets/tenant/image/courses/thumbnails/'; protected $coverPath = 'assets/tenant/image/courses/covers/'; protected $isDeleteOldRecords; public function __construct(MasterAiGenerator $ai) { $this->ai = $ai; $this->isDeleteOldRecords = $this->ai->isDeleteOldRecords(); } public function generate(int $count = 3) { // delete old records if ($this->isDeleteOldRecords) { $userId = $this->ai->getUserId(); $oldCourses = Course::where('user_id', $userId)->get(); foreach ($oldCourses as $course) { // Thumbnail image if ($course->thumbnail_image && $course->thumbnail_image !== 'default.jpg' && file_exists(public_path($this->thumbPath . $course->thumbnail_image))) { @unlink(public_path($this->thumbPath . $course->thumbnail_image)); } // Cover image if ($course->cover_image && $course->cover_image !== 'default.jpg' && file_exists(public_path($this->coverPath . $course->cover_image))) { @unlink(public_path($this->coverPath . $course->cover_image)); } } CourseInformation::whereHas('course', function ($q) use ($userId) { $q->where('user_id', $userId); })->delete(); Course::where('user_id', $userId)->delete(); } $userId = $this->ai->getUserId(); $defaultLangId = $this->ai->getDefaultLanguageId(); $language = Language::where('id', $defaultLangId) ->where('user_id', $userId) ->first(); if (!$language) { return; } $categories = CourseCategory::where('user_id', $userId) ->where('language_id', $defaultLangId) ->get(); $instructors = Instructor::where('user_id', $userId) ->where('language_id', $defaultLangId) ->get(); if ($categories->isEmpty() \|\| $instructors->isEmpty()) { return; } // slug => category map $categoryMap = $categories->keyBy('slug'); $definitions = $this->getCourseDefinitions($count); foreach ($definitions as $def) { $category = $categoryMap[$def['category_slug']] ?? $categories->random(); $pricing = $def['pricing_type']; $current = $pricing === 'free' ? 0 : $def['current_price']; $previous = $pricing === 'free' ? 0 : $def['previous_price']; $course = Course::create([ 'user_id' => $userId, 'thumbnail_image' => 'default.jpg', 'video_link' => $this->fakeVideoLink(), 'cover_image' => 'default.jpg', 'pricing_type' => $pricing, 'previous_price' => $previous, 'current_price' => $current, 'status' => 'published', 'is_featured' => $def['is_featured'] ? 'yes' : 'no', 'average_rating' => $def['average_rating'], 'duration' => $def['duration'], 'certificate_status' => 1, 'video_watching' => 80, 'quiz_completion' => 60, 'certificate_title' => $def['certificate_title'], 'certificate_text' => $def['certificate_text'], 'min_quiz_score' => 60, ]); $infoPrompts = $this->getCourseInfoPrompts($course, $language, $category); $rawTitle = $this->ai->generateText($infoPrompts['title_prompt']); $title = $this->extractLine($rawTitle, 100); $slug = make_slug($title); if ( CourseInformation::where('user_id', $userId) ->where('language_id', $language->id) ->where('slug', $slug) ->exists() ) { $slug .= '-' . time() . '-' . rand(10, 99); } $rawDesc = $this->ai->generateText($infoPrompts['description_prompt']); $desc = $this->extractText($rawDesc, 800); $rawMetaKw = $this->ai->generateText($infoPrompts['meta_keywords_prompt']); $metaKw = $this->extractText($rawMetaKw, 200); $rawMetaDs = $this->ai->generateText($infoPrompts['meta_description_prompt']); $metaDs = $this->extractText($rawMetaDs, 200); $rawThanks = $this->ai->generateText($infoPrompts['thanks_prompt']); $thanks = $this->extractText($rawThanks, 400); $features = $this->ai->generateText($infoPrompts['features_prompt']); $features = $this->extractText($features, 400); $thumbPrompt = $this->buildThumbPrompt($title, $def, $category); $coverPrompt = $this->buildCoverPrompt($title, $def, $category); $thumbName = $this->ai->generateImage( $thumbPrompt, 370, 250, $this->thumbPath ); $coverName = $this->ai->generateImage( $coverPrompt, 1920, 550, $this->coverPath ); $course->update([ 'thumbnail_image' => $thumbName, 'cover_image' => $coverName, ]); CourseInformation::create([ 'language_id' => $language->id, 'user_id' => $userId, 'course_category_id' => $category->id, 'course_id' => $course->id, 'title' => $title, 'slug' => $slug, 'instructor_id' => $instructors->random()->id, 'features' => $features, 'description' => $desc, 'meta_keywords' => $metaKw, 'meta_description' => $metaDs, 'thanks_page_content' => $thanks, ]); } } private function getCourseDefinitions(int $count): array { $businessName = $this->ai->getBusinessName(); $industry = $this->ai->getIndustry(); $info = $this->ai->getBusinessInfo(); $baseContext = "{$businessName} provides {$industry}-related courses and training. {$info}"; $base = [ [ 'pricing_type' => 'premium', 'current_price' => 59, 'previous_price' => 99, 'is_featured' => true, 'average_rating' => 4.7, 'duration' => '08:30:00', 'certificate_title' => 'Certificate of Completion', 'certificate_text' => 'This certificate is awarded for successfully completing the full course and assessments.', 'category_slug' => 'programming-development', ], [ 'pricing_type' => 'premium', 'current_price' => 29, 'previous_price' => 49, 'is_featured' => true, 'average_rating' => 4.5, 'duration' => '04:15:00', 'certificate_title' => 'Professional Skills Certificate', 'certificate_text' => 'Awarded to learners who complete all modules and pass the final quiz with required score.', 'category_slug' => 'marketing-business', ], [ 'pricing_type' => 'free', 'current_price' => 0, 'previous_price' => 0, 'is_featured' => false, 'average_rating' => 4.3, 'duration' => '02:00:00', 'certificate_title' => 'Introductory Course Certificate', 'certificate_text' => 'Provides recognition for successfully completing this introductory course.', 'category_slug' => 'data-analytics', ], ]; $result = []; for ($i = 0; $i < $count; $i++) { $result[] = $base[$i % count($base)]; } return $result; } private function buildThumbPrompt(string $title, array $def, CourseCategory $category): string { return "flat 2D online course thumbnail icon for \"{$title}\" in {$category->name} category, " . "single large clear symbol or pictogram in the center representing the topic, " . "no real text, no small UI elements, minimal shapes, bold outline, " . "high contrast simple background, clean 16:9 composition, " . "sharp vector style, edges and icon clearly defined, not blurry"; } private function buildCoverPrompt(string $title, array $def, CourseCategory $category): string { return "wide hero banner background for \"{$title}\" course in {$category->name} category, " . "large clear symbolic illustration or icon group on one side, " . "the other side kept mostly empty with smooth gradient for overlay text, " . "no real readable text drawn in the image, no logos, " . "simple shapes, clean lines, high contrast between icon and background, " . "1920x550 layout, modern e-learning style, not busy, not cluttered"; } private function getCourseInfoPrompts(Course $course, Language $language, CourseCategory $category): array { $businessName = $this->ai->getBusinessName(); $baseContext = "Provider: {$businessName}. Course ID: {$course->id}. Language: {$language->name}. " . "This course belongs to the '{$category->name}' category."; return [ 'title_prompt' => "You must return ONLY 5-9 words. No formatting, no explanation. Generate a clear, compelling online course title that clearly fits the '{$category->name}' category. The topic must be strongly related to {$category->name}. Output: Just the title, nothing else. Context: {$baseContext}", 'description_prompt' => "You must return 140-200 words. No formatting, no explanation. Write a high-converting online course description for the '{$category->name}' course. Include: who this course is for, main skills learned, key modules, outcomes and benefits. Tone: friendly, professional, motivating. Output: Plain text only, 140-200 words. Context: {$baseContext}", 'features_prompt' => "You must return 5-7 short bullet-style features separated by semicolons. No bullet characters, no formatting. Focus on features relevant to {$category->name}. Output: Just the feature items separated by semicolons. Context: {$baseContext}", 'meta_keywords_prompt' => "You must return ONLY 6-8 SEO keywords separated by commas. No formatting. Generate SEO keywords for this {$category->name} online course. Include: topic, level, main tool/skill, course type. Output: Comma-separated keywords only. Context: {$baseContext}", 'meta_description_prompt' => "You must return EXACTLY 145-155 characters. No formatting. Write an SEO meta description for this {$category->name} course. Highlight: target audience, main benefit, call to enroll. Output: Plain text only, 145-155 characters. Context: {$baseContext}", 'thanks_prompt' => "You must return 60-100 words. No formatting, no explanation. Write a friendly thank you message for the course thank-you page after enrollment. Include: gratitude, what to do next, how to start lessons. Output: Plain text only, 60-100 words. Context: {$baseContext}", ]; } private function fakeVideoLink(): string { $id = Str::random(11); return "https://www.youtube.com/watch?v={$id}"; } private function extractLine(string $text, int $maxLen): string { $text = preg_replace('/^(Here are\|Here is\|Sure\|Certainly\|Options:)/i', '', $text); $text = preg_replace('/[_#`~\[\]<>]/', '', $text); $text = preg_replace('/\r?\n./s', '', $text); $text = preg_replace('/\s+/', ' ', $text); $text = trim($text); if (strlen($text) > $maxLen) { $text = substr($text, 0, $maxLen); } return $text; } private function extractText(string $text, int $maxLen): string { $text = preg_replace('/^(Here are\|Here is\|Sure\|Certainly\|Options:)/i', '', $text); $text = preg_replace('/[*_#`~\[\]<>]/', '', $text); $text = preg_replace('/\s+/', ' ', $text); $text = trim($text); if (strlen($text) > $maxLen) { $text = substr($text, 0, $maxLen); } return $text; } }

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