#!/usr/bin/env python3
"""Generate a combo image from a kq4-decompile visual image using ComfyUI workflow."""

import json
import os
import shutil
import sys
import time
import urllib.request
import uuid
from pathlib import Path


def check_server(server_address: str = "127.0.0.1:8188", timeout: int = 5) -> bool:
    """Check if ComfyUI server is running and accessible."""
    try:
        req = urllib.request.Request(
            f"http://{server_address}/system_stats",
            method="GET",
        )
        with urllib.request.urlopen(req, timeout=timeout) as response:
            return response.status == 200
    except Exception:
        return False


def queue_prompt(prompt: dict, server_address: str = "127.0.0.1:8188") -> dict:
    """Queue a prompt to ComfyUI server."""
    client_id = str(uuid.uuid4())
    p = {"prompt": prompt, "client_id": client_id}
    data = json.dumps(p).encode("utf-8")
    req = urllib.request.Request(
        f"http://{server_address}/prompt",
        data=data,
        headers={"Content-Type": "application/json"},
    )
    with urllib.request.urlopen(req) as response:
        return json.loads(response.read())


def get_existing_files(directory: str) -> set:
    """Get set of existing filenames in directory."""
    if not os.path.exists(directory):
        return set()
    return set(f for f in os.listdir(directory) if f.endswith(".png"))


def wait_for_file_with_prefix(
    directory: str, prefix: str, timeout: int = 240
) -> str | None:
    """Wait for a PNG file with specific prefix to appear in directory."""
    start_time = time.time()

    while time.time() - start_time < timeout:
        if os.path.exists(directory):
            for filename in os.listdir(directory):
                if filename.startswith(prefix) and filename.endswith(".png"):
                    return os.path.join(directory, filename)

        time.sleep(0.5)

    return None


def generate_from_caption_combo(
    image_path: str,
    caption_text: str,
    seed: int,
    server_address: str = "127.0.0.1:8188",
    caption_num: int = 1,
) -> str:
    """Generate combo image from kq4-decompile visual image with given seed.

    Args:
        image_path: Path to kq4-decompile visual image
        caption_text: Direct caption text for the scene (not AI-generated)
        seed: Random seed for generation
        server_address: ComfyUI server address

    Returns:
        Path to the generated output image
    """
    if not os.path.exists(image_path):
        raise FileNotFoundError(f"Image file not found: {image_path}")

    image_path = os.path.abspath(image_path)

    script_dir = os.path.dirname(os.path.abspath(__file__))
    workflow_path = os.path.join(script_dir, "..", "tools", "klein-qwen-combo.json")
    workflow_path = os.path.normpath(workflow_path)
    with open(workflow_path, "r") as f:
        workflow = json.load(f)

    workflow["157"]["inputs"]["image"] = image_path

    workflow["167"]["inputs"]["text"] = caption_text

    workflow["196"]["inputs"]["seed"] = seed

    unique_id = str(uuid.uuid4())[:8]
    filename_prefix = f"auto_background/gen_{unique_id}"
    workflow["183"]["inputs"]["filename_prefix"] = filename_prefix

    comfy_output_dir = (
        "/mnt/cached/staging/data_backup/ai/ComfyUI/output/auto_background"
    )
    os.makedirs(comfy_output_dir, exist_ok=True)
    existing_files = get_existing_files(comfy_output_dir)
    print(f"Found {len(existing_files)} existing files in output directory")

    print(f"Queuing prompt with seed {seed}...")
    response = queue_prompt(workflow, server_address)
    prompt_id = response["prompt_id"]
    print(f"Prompt ID: {prompt_id}")
    print(f"Expected filename prefix: {filename_prefix}")

    print("Waiting for generation (up to 4 minutes)...")
    new_file = wait_for_file_with_prefix(
        comfy_output_dir, f"gen_{unique_id}", timeout=240
    )

    if not new_file:
        raise RuntimeError("Timeout: No new image file appeared in 4 minutes")

    print(f"New image generated: {os.path.basename(new_file)}")

    time.sleep(2)

    image_basename = os.path.basename(image_path)
    room_name = (
        image_basename.replace("pic_", "").replace("_visual.png", "").replace("_", "-")
    )

    combo_outputs_dir = os.path.join(script_dir, "combo_outputs", room_name)
    os.makedirs(combo_outputs_dir, exist_ok=True)

    output_image_path = os.path.join(
        combo_outputs_dir, f"{room_name}_caption_{caption_num}_{seed}_generated.png"
    )
    shutil.copy2(new_file, output_image_path)
    print(f"Saved image: {output_image_path}")

    return output_image_path


def main():
    import argparse

    parser = argparse.ArgumentParser(
        description="Generate combo image from kq4-decompile visual using ComfyUI"
    )
    parser.add_argument(
        "image_path",
        help="Path to kq4-decompile visual image (e.g., kq4-sierra-decompile/rooms/kq4-057-witch-cave/pic_057_visual.png)",
    )
    parser.add_argument(
        "caption_text",
        help="Direct caption text for the scene (not AI-generated)",
    )
    parser.add_argument("seed", type=int, help="Random seed for generation")
    parser.add_argument(
        "--server",
        default="127.0.0.1:8188",
        help="ComfyUI server address (default: 127.0.0.1:8188)",
    )
    parser.add_argument(
        "--dry-run",
        action="store_true",
        help="Test mode: validate image file and server connection without generating images",
    )
    parser.add_argument(
        "--caption-num",
        type=int,
        default=1,
        help="Caption number for output filename (default: 1)",
    )

    args = parser.parse_args()

    if not os.path.exists(args.image_path):
        print(f"Error: Image file not found: {args.image_path}")
        sys.exit(1)

    image_basename = os.path.basename(args.image_path)
    print(f"Image: {image_basename}")
    print(
        f"Caption: {args.caption_text[:50]}..."
        if len(args.caption_text) > 50
        else f"Caption: {args.caption_text}"
    )
    print(f"Seed: {args.seed}")
    print(f"Server: {args.server}")

    if args.dry_run:
        print("\n[Dry Run Mode - Checking server connection...]")
        if check_server(args.server):
            print("✓ ComfyUI server is running and accessible")
            print("\n✓ Dry run successful! All checks passed.")
            sys.exit(0)
        else:
            print(f"✗ ComfyUI server is not accessible at {args.server}")
            print("  Please ensure ComfyUI is running before generating images.")
            sys.exit(1)

    print("\nChecking ComfyUI server...")
    if not check_server(args.server):
        print(f"Error: ComfyUI server is not running at {args.server}")
        print("Please start ComfyUI first or check the server address.")
        print(f"\nTo test without generating, use: --dry-run")
        sys.exit(1)

    print("✓ ComfyUI server is running")

    try:
        output_path = generate_from_caption_combo(
            args.image_path,
            args.caption_text,
            args.seed,
            args.server,
            caption_num=args.caption_num,
        )
        print(f"\nGeneration complete! Output: {output_path}")
    except Exception as e:
        print(f"Error: {e}")
        sys.exit(1)


if __name__ == "__main__":
    main()