import { Injectable, Logger } from '@nestjs/common';
import { AiImageService } from './image/ai-image.service';
import { AiImageGenerationService } from './image/ai-image-generation.service';
import { PrismaService } from '../../database/prisma.service';

export interface LifestyleRequest {
  productId: string;
  originalImageUrl: string;
  theme: 'minimalist' | 'luxury' | 'nature' | 'urban' | 'cozy';
  customDescription?: string;
}

@Injectable()
export class AiStudioService {
  private readonly logger = new Logger(AiStudioService.name);

  constructor(
    private prisma: PrismaService,
    private imageService: AiImageService,
    private imageGenService: AiImageGenerationService,
  ) {}

  /**
   * Generates a lifestyle version of a product image
   */
  async generateLifestyleImage(request: LifestyleRequest): Promise<string> {
    this.logger.log(
      `Generating lifestyle image for product: ${request.productId} with theme: ${request.theme}`,
    );

    // 1. Remove background from original image (simulated for now)
    const transparentProductUrl = await this.imageService.removeBackground(
      request.originalImageUrl,
    );

    // 2. Construct an advanced prompt for the lifestyle scene
    const themePrompts = {
      minimalist:
        'placed in a premium minimalist modern living room with soft natural lighting, high-end textures, 8k resolution, professional product photography',
      luxury:
        'placed in a luxury penthouse setting at sunset, marble surfaces, elegant atmosphere, cinematic lighting, ultra-realistic',
      nature:
        'on a smooth stone in a serene Zen garden near a waterfall, soft morning mist, macro photography, vibrant colors',
      urban:
        'in a modern urban industrial loft with brick walls and large windows, city skyline background, trendy vibe',
      cozy: 'on a wooden table next to a warm fireplace with a knitted blanket, warm orange glow, cozy autumn atmosphere',
    };

    const finalPrompt = `A high-quality commercial photo of a product (represented by: ${request.customDescription || 'the main object'}) ${themePrompts[request.theme]}. The product should be the central focus, perfectly integrated into the scene.`;

    // 3. Generate the scene using AI
    const generatedSceneUrl = await this.imageGenService.generateImage(
      finalPrompt,
      '1024x1024',
    );

    // 4. Log the studio activity
    await this.prisma.activityLog.create({
      data: {
        tenantId: 'system', // Should be dynamic
        action: 'ai.lifestyle_generated',
        resource: 'ai_studio',
        details: {
          productId: request.productId,
          theme: request.theme,
          resultUrl: generatedSceneUrl,
        },
      },
    });

    return generatedSceneUrl;
  }

  /**
   * Generates a short video script and assets (simulation)
   */
  async generateVideoShort(productId: string): Promise<any> {
    this.logger.log(`Generating video short concept for product: ${productId}`);

    // In a real implementation, this would call APIs like HeyGen, RunWayML, or Sora
    return {
      id: `vid-${Date.now()}`,
      status: 'completed',
      previewUrl: 'https://example.com/mock-video.mp4',
      scenes: [
        { time: '0-2s', text: 'Zarafeti Hissedin' },
        { time: '2-5s', text: 'Size Özel Tasarım' },
        { time: '5-7s', text: 'Şimdi Keşfedin' },
      ],
    };
  }
}