import os
import sys
import uuid
import time
import argparse
import numpy as np
from PIL import Image

import mc_render
import gpt_image
from build_target_img import check_skin, ensure_valid_skin
from alice_to_steve import alice_to_steve
from mc_voxel_texture_resolver import resolve_voxel_consistency

def main():
    parser = argparse.ArgumentParser(
        description="Render Minecraft skin to 3D views and call the img2img model with base64 references."
    )
    parser.add_argument("skin", help="Path to local Minecraft skin image file.")
    parser.add_argument("-o", "--output", help="Output path for the generated image. Defaults to 'result_<timestamp>.png'.")
    parser.add_argument("-p", "--prompt", default="生成ta的全身真人照片，再生成ta的背面放在图片右边。请准确还原人物的特征细节，注意真人照片里面通常不包含像素风格的装饰。", help="Prompt for the img2img model.")
    parser.add_argument(
        "-r",
        "--render-only",
        action="store_true",
        help="Only render the 3D front and back views locally, without calling img2img.",
    )
    args = parser.parse_args()

    # 1. Validate skin path
    if not os.path.exists(args.skin):
        print(f"Error: Skin file '{args.skin}' does not exist.")
        sys.exit(1)

    # 2. Process/Validate the skin image (Alex/Steve conversion, validity, consistency)
    try:
        print(f"[*] Processing skin file: {args.skin}")
        skin_image = Image.open(args.skin).convert('RGBA')
        valid, is_alex = check_skin(skin_image)
        if not valid:
            print(f"Error: Skin '{args.skin}' fails validation.")
            sys.exit(1)
        if is_alex:
            print("[*] Detected Alex skin. Converting to Steve...")
            skin_image = alice_to_steve(skin_image)
        
        skin_image = ensure_valid_skin(skin_image)
        skin_image = resolve_voxel_consistency(skin_image)
    except Exception as e:
        print(f"[!] Skin processing failed: {e}")
        sys.exit(1)

    # 3. Generate front and back 3D renders using mc_render
    pos_args2 = {
        'head': (0, 28, 0),
        'body': (0, 18, 0),
        'right_arm': (-6, 18, 0),
        'left_arm': (6, 18, 0),
        'right_leg': (-2, 6, 0),
        'left_leg': (2, 6, 0),
    }

    # Determine output filenames for renders
    if args.render_only:
        if args.output:
            base, ext = os.path.splitext(args.output)
            temp_front_path = f"{base}_front{ext or '.png'}"
            temp_back_path = f"{base}_back{ext or '.png'}"
        else:
            temp_front_path = "render_front.png"
            temp_back_path = "render_back.png"
    else:
        # Generate unique filenames for temp renders
        unique_id = uuid.uuid4()
        temp_front_path = f"temp_front_{unique_id}.png"
        temp_back_path = f"temp_back_{unique_id}.png"

    try:
        print("[*] Rendering skin 3D front view...")
        mc_render.render_skin(
            skin=np.array(skin_image),
            output_size=(768, 768),
            cam_front=(0.25, 0.25, 0.25),
            use_voxels=False,
            ortho=False,
            save_path=temp_front_path,
            transparent_background=True,
            zoom=0.3,
            look_at_y=18,
            pos_args=pos_args2,
            off_screen=True
        )

        print("[*] Rendering skin 3D back view...")
        mc_render.render_skin(
            skin=np.array(skin_image),
            output_size=(768, 768),
            cam_front=(-0.25, 0.25, -0.25),
            use_voxels=False,
            ortho=False,
            save_path=temp_back_path,
            transparent_background=True,
            zoom=0.3,
            look_at_y=18,
            pos_args=pos_args2,
            off_screen=True
        )

        if args.render_only:
            print(f"[+] Render-only mode active. Views saved to:\n  - {temp_front_path}\n  - {temp_back_path}")
            return

        # 4. Invoke gpt_image.generate_img2img
        print("[*] Invoking image-to-image pipeline via gpt_image...")
        output_file = gpt_image.generate_img2img(
            local_image_paths=[temp_front_path, temp_back_path],
            prompt=args.prompt,
            output_path=args.output
        )
        print(f"[+] Pipeline completed successfully. Output saved to: {output_file}")

    except Exception as e:
        print(f"[!] Execution failed: {e}")
        sys.exit(1)
    finally:
        # Clean up local temporary files if not in render-only mode
        if not args.render_only:
            for temp_file in [temp_front_path, temp_back_path]:
                if os.path.exists(temp_file):
                    print(f"[*] Removing local temporary file: {temp_file}")
                    try:
                        os.remove(temp_file)
                    except Exception as e:
                        print(f"[!] Failed to remove local file {temp_file}: {e}")

if __name__ == '__main__':
    main()