#!/usr/bin/env python3

import json
import base64
import time
import urllib.request
import os
import sys
import subprocess
from pathlib import Path
from typing import List, Dict, Any, Optional

from rich.console import Console
from rich.panel import Panel
from rich.live import Live
from rich.table import Table
from rich.progress import Progress, SpinnerColumn, TextColumn

# --- EMOJIS ---
EMOJI_CONFIG = "⚙️"
EMOJI_IMAGE = "🖼️"
EMOJI_PROMPT = "💬"
EMOJI_START = "🚀"
EMOJI_EXIT = "🚪"
EMOJI_SUCCESS = "✅"
EMOJI_FAIL = "❌"
EMOJI_SKIP = "⏭️"
EMOJI_LOG = "📝"

# --- CONFIGURATION ---
CONFIG_FILE = "config.json"
DEFAULT_CONFIG = {
    "image_source": "directory",  # 'directory' or 'specific_files'
    "image_dir": ".",
    "specific_files": [],
    "image_ext": ".jpg",
    "model": "moondream",
    "api_url": "http://localhost:11434/api/generate",
    "prompt": "Describe this image in a single, descriptive sentence.",
}

console = Console()


def run_gum_command(command: List[str]) -> Optional[str]:
    """Runs a gum command and returns its stripped output."""
    try:
        result = subprocess.run(
            ["gum"] + command,
            capture_output=True,
            text=True,
            check=True,
        )
        return result.stdout.strip()
    except (subprocess.CalledProcessError, FileNotFoundError) as e:
        console.print(
            f"[bold red]Error running 'gum'. Is it installed and in your PATH? ({e})[/bold red]"
        )
        return None


def load_config() -> Dict[str, Any]:
    """Loads configuration from JSON file or returns default."""
    if Path(CONFIG_FILE).exists():
        with open(CONFIG_FILE, "r") as f:
            try:
                config = json.load(f)
                # Ensure all keys from default are present
                for key, value in DEFAULT_CONFIG.items():
                    config.setdefault(key, value)
                return config
            except json.JSONDecodeError:
                return DEFAULT_CONFIG
    return DEFAULT_CONFIG

def save_config(config: Dict[str, Any]):
    """Saves configuration to JSON file."""
    with open(CONFIG_FILE, "w") as f:
        json.dump(config, f, indent=4)

def get_image_files(config: Dict[str, Any]) -> List[Path]:
    """Gets a list of image files based on the configuration."""
    if config["image_source"] == "directory":
        source_dir = Path(config["image_dir"])
        if not source_dir.is_dir():
            console.print(
                f"[bold red]Error: Image directory '{source_dir}' not found.[/bold red]"
            )
            return []
        return sorted(list(source_dir.glob(f"*{config['image_ext']}")))
    elif config["image_source"] == "specific_files":
        return [Path(f) for f in config["specific_files"]]
    return []

def get_caption(
    image_path: Path,
    config: Dict[str, Any]
) -> Optional[str]:
    """Sends image to Ollama and returns the caption."""
    try:
        with open(image_path, "rb") as img_f:
            image_data = base64.b64encode(img_f.read()).decode("utf-8")

        payload = {
            "model": config["model"],
            "prompt": config["prompt"],
            "images": [image_data],
            "stream": False,
        }

        req = urllib.request.Request(
            config["api_url"],
            data=json.dumps(payload).encode("utf-8"),
            headers={"Content-Type": "application/json"},
        )

        with urllib.request.urlopen(req) as response:
            result = json.loads(response.read().decode("utf-8"))
            return result.get("response", "").strip()

    except Exception as e:
        return f"ERROR: {e}"

def show_main_menu(config: Dict[str, Any]):
    """Displays the main interactive menu."""
    while True:
        console.print(
            Panel(
                f"[bold cyan]Ollama Image Captionizer[/bold cyan]\n\n"
                f"{EMOJI_CONFIG} [bold]Current Settings:[/bold]\n"
                f"  - [yellow]Model[/yellow]: {config['model']}\n"
                f"  - [yellow]Image Source[/yellow]: {config['image_source']}\n"
                f"  - [yellow]Image Ext[/yellow]: {config['image_ext']}\n"
                f"  - [yellow]Image Dir/Files[/yellow]: {config['image_dir'] if config['image_source'] == 'directory' else f'{len(config['specific_files'])} files'}\n\n"
                f"{EMOJI_PROMPT} [bold]Prompt:[/bold] \"{config['prompt']}"",
                title="Main Menu",
                border_style="green",
                expand=False,
            )
        )

        choice = run_gum_command(
            [
                "choose",
                f"{EMOJI_IMAGE} Set Image Source",
                f"{EMOJI_PROMPT} Edit Prompt",
                f"{EMOJI_START} Start Captioning",
                f"{EMOJI_EXIT} Exit",
            ]
        )

        if choice and choice.startswith(EMOJI_IMAGE):
            set_image_source(config)
        elif choice and choice.startswith(EMOJI_PROMPT):
            new_prompt = run_gum_command(
                [
                    "input",
                    "--value",
                    config["prompt"],
                    "--header",
                    "Enter the new prompt",
                ]
            )
            if new_prompt is not None:
                config["prompt"] = new_prompt
                save_config(config)
        elif choice and choice.startswith(EMOJI_START):
            files_to_process = get_image_files(config)
            if files_to_process:
                process_images(files_to_process, config)
            else:
                console.print("[bold yellow]No image files found to process.[/bold yellow]")
                time.sleep(2)

        elif choice and choice.startswith(EMOJI_EXIT):
            console.print("[bold magenta]Goodbye![/bold magenta]")
            sys.exit(0)
        elif choice is None: # Gum was cancelled
            console.print("[bold magenta]Goodbye![/bold magenta]")
            sys.exit(0)

def set_image_source(config: Dict[str, Any]):
    """Menu to set the image source."""
    choice = run_gum_command(
        [
            "choose",
            "Process a directory of images",
            "Select specific image files",
        ]
    )

    if choice and choice.startswith("Process"):
        new_dir = run_gum_command(
            [
                "input",
                "--value",
                config["image_dir"],
                "--header",
                "Enter the directory path",
            ]
        )
        if new_dir is not None:
            config["image_source"] = "directory"
            config["image_dir"] = new_dir
            save_config(config)

    elif choice and choice.startswith("Select"):
        files_str = run_gum_command(["file", "--multiple", "--file", config["image_dir"]])
        if files_str:
            files = files_str.split("\n")
            config["image_source"] = "specific_files"
            config["specific_files"] = files
            save_config(config)

def process_images(image_files: List[Path], config: Dict[str, Any]):
    """Processes the list of images and displays progress."""
    log_table = Table(
        title=f"{EMOJI_LOG} Captioning Log",
        expand=True,
        border_style="blue",
    )
    log_table.add_column("File", style="cyan", no_wrap=True)
    log_table.add_column("Status", style="magenta")
    log_table.add_column("Caption/Error", style="green")

    with Live(log_table, refresh_per_second=4, console=console) as live:
        for image_path in image_files:
            output_file = image_path.with_suffix(".txt")

            if not image_path.exists():
                log_table.add_row(
                    str(image_path.name),
                    f"{EMOJI_SKIP} Skipped",
                    "[yellow]Image file not found.",
                )
                continue
            
            with Progress(
                SpinnerColumn(),
                TextColumn("[progress.description]{task.description}"),
                transient=True,
            ) as progress:
                progress.add_task(f"Processing {image_path.name}", total=None)
                caption = get_caption(image_path, config)
            
            if caption and not caption.startswith("ERROR:"):
                if len(caption.split()) <= 1:
                     status = f"{EMOJI_FAIL} Warning"
                     details = f"[yellow]Single-word caption: '{caption}'"
                else:
                    status = f"{EMOJI_SUCCESS} Success"
                    details = f'"{caption[:60].replace(os.linesep, " ")}"...'
                
                with open(output_file, "w") as out_f:
                    out_f.write(caption)

                log_table.add_row(str(image_path.name), status, details)
            elif not caption:
                 log_table.add_row(
                    str(image_path.name),
                    f"{EMOJI_FAIL} Failed",
                    "[red]Model returned an empty string.",
                )
            else: # Error case
                log_table.add_row(
                    str(image_path.name),
                    f"{EMOJI_FAIL} Error",
                    f"[bold red]{caption}",
                )
            live.update(log_table)
            time.sleep(0.5) #- Rate limit

    console.print("[bold green]\nAll processing complete.[/bold green]")
    console.print("Press Enter to return to the main menu.")
    input()

def main():
    """Main function to run the captionizer."""
    try:
        config = load_config()
        show_main_menu(config)
    except KeyboardInterrupt:
        console.print("\n[bold magenta]Exiting gracefully. Goodbye![/bold magenta]")
    except Exception as e:
        console.print(f"[bold red]An unexpected error occurred: {e}[/bold red]")


if __name__ == "__main__":
    main()