"""Command-line interface for Audio Video Generator."""

import logging
import os
import sys
from pathlib import Path
from typing import List, Optional

import click
from tqdm import tqdm

from audio_video_generator import __version__
from audio_video_generator.config import (
    ANIMATION_OPTIONS,
    ANIMATION_RANDOM_POOL,
    DEFAULT_OUTPUT_NAME,
    RESOLUTION_MAP,
    TRANSITION_OPTIONS,
    TRANSITION_RANDOM_POOL,
)
from audio_video_generator.core.pipeline import (
    VideoPipeline,
    VideoPipelineConfig,
)


def setup_logging(verbose: bool = False) -> None:
    """Configure logging."""
    level = logging.DEBUG if verbose else logging.INFO
    logging.basicConfig(
        level=level,
        format="%(levelname)s: %(message)s",
        handlers=[logging.StreamHandler(sys.stdout)]
    )


def validate_file(ctx, param, value):
    """Validate file exists."""
    if value is None:
        return None
    if not os.path.exists(value):
        raise click.BadParameter(f"File not found: {value}")
    return value


@click.group()
@click.version_option(version=__version__, prog_name="avg")
@click.option("--verbose", "-v", is_flag=True, help="Enable verbose output")
@click.pass_context
def cli(ctx: click.Context, verbose: bool) -> None:
    """Audio Video Generator - Synchronize images to audio.
    
    Generate videos by synchronizing images to audio using Whisper
    transcription and CSV mapping files.
    
    Example:
        avg generate -a audio.mp3 -c mapping.csv -i images.zip -o output.mp4
    """
    ctx.ensure_object(dict)
    ctx.obj["verbose"] = verbose
    setup_logging(verbose)


@cli.command()
@click.option(
    "--audio", "-a",
    required=True,
    type=click.Path(exists=True, dir_okay=False),
    help="Path to audio file (mp3, wav, m4a, etc.)"
)
@click.option(
    "--csv", "-c",
    required=True,
    type=click.Path(exists=True, dir_okay=False),
    help="Path to CSV mapping file (text, image columns)"
)
@click.option(
    "--images", "-i",
    type=click.Path(exists=True),
    help="Path to images (ZIP file or directory)"
)
@click.option(
    "--output", "-o",
    default=DEFAULT_OUTPUT_NAME,
    help=f"Output video filename (default: {DEFAULT_OUTPUT_NAME})"
)
@click.option(
    "--resolution", "-r",
    type=click.Choice(["landscape", "portrait", "square"]),
    default="landscape",
    help="Output resolution preset"
)
@click.option(
    "--animation-mode",
    type=click.Choice(["single", "custom", "random"]),
    default="random",
    help="Image animation selection mode"
)
@click.option(
    "--animation",
    type=click.Choice(ANIMATION_OPTIONS),
    help="Single animation to use (with --animation-mode=single)"
)
@click.option(
    "--animations",
    multiple=True,
    type=click.Choice(ANIMATION_RANDOM_POOL),
    help="Custom animations to cycle through (with --animation-mode=custom)"
)
@click.option(
    "--transition-mode",
    type=click.Choice(["single", "custom", "random"]),
    default="random",
    help="Image transition selection mode"
)
@click.option(
    "--transition",
    type=click.Choice(TRANSITION_OPTIONS),
    help="Single transition to use (with --transition-mode=single)"
)
@click.option(
    "--transitions",
    multiple=True,
    type=click.Choice(TRANSITION_RANDOM_POOL),
    help="Custom transitions to cycle through (with --transition-mode=custom)"
)
@click.option(
    "--txt-overlay",
    type=click.Path(exists=True, dir_okay=False),
    help="Path to TXT file for text overlay (one phrase per line)"
)
@click.option(
    "--font-size",
    type=int,
    default=56,
    help="Text overlay font size"
)
@click.option(
    "--text-color",
    default="#FFFFFF",
    help="Text overlay color (hex)"
)
@click.option(
    "--text-pos-x",
    type=float,
    default=0.5,
    help="Text horizontal position (0.0 to 1.0)"
)
@click.option(
    "--text-pos-y",
    type=float,
    default=0.5,
    help="Text vertical position (0.0 to 1.0)"
)
@click.option(
    "--whisper-model",
    default="base",
    help="Whisper model size (tiny, base, small, medium, large)"
)
@click.option(
    "--work-dir",
    type=click.Path(),
    default="./avg_runs",
    help="Working directory for outputs and checkpoints"
)
@click.option(
    "--fps",
    type=int,
    default=24,
    help="Output video framerate"
)
@click.option(
    "--save-checkpoints/--no-checkpoints",
    default=True,
    help="Save checkpoint files"
)
@click.option(
    "--keep-work-dir/--clean-work-dir",
    default=False,
    help="Keep working directory after completion"
)
@click.pass_context
def generate(
    ctx: click.Context,
    audio: str,
    csv: str,
    images: Optional[str],
    output: str,
    resolution: str,
    animation_mode: str,
    animation: Optional[str],
    animations: tuple,
    transition_mode: str,
    transition: Optional[str],
    transitions: tuple,
    txt_overlay: Optional[str],
    font_size: int,
    text_color: str,
    text_pos_x: float,
    text_pos_y: float,
    whisper_model: str,
    work_dir: str,
    fps: int,
    save_checkpoints: bool,
    keep_work_dir: bool
) -> None:
    """Generate video from audio, images, and CSV mapping."""
    verbose = ctx.obj.get("verbose", False)
    
    # Validate images input
    if images is None:
        click.echo("Error: --images is required (ZIP file or directory)", err=True)
        sys.exit(1)
    
    # Determine image input mode
    if images.endswith(".zip"):
        input_mode = "ZIP"
    elif os.path.isdir(images):
        input_mode = "MANUAL"
    else:
        click.echo(f"Error: Images must be a ZIP file or directory: {images}", err=True)
        sys.exit(1)
    
    # Build text style config
    text_style = {
        "font_size": font_size,
        "text_color": text_color,
        "pos_x": text_pos_x,
        "pos_y": text_pos_y,
    }
    
    # Build pipeline config
    config = VideoPipelineConfig(
        audio_path=audio,
        csv_path=csv,
        input_mode=input_mode,
        zip_path=images if input_mode == "ZIP" else None,
        manual_images_dir=images if input_mode == "MANUAL" else None,
        output_filename=output,
        resolution=resolution,
        animation_mode=animation_mode,
        single_animation=animation,
        custom_animations=list(animations) if animations else None,
        transition_mode=transition_mode,
        single_transition=transition,
        custom_transitions=list(transitions) if transitions else None,
        txt_path=txt_overlay,
        enable_text_overlay=txt_overlay is not None,
        text_style=text_style if txt_overlay else None,
        whisper_model=whisper_model,
        work_root=work_dir,
        fps=fps,
        save_checkpoints=save_checkpoints,
        keep_work_dir=keep_work_dir,
    )
    
    # Run pipeline
    pipeline = VideoPipeline(config)
    
    try:
        click.echo(f"Starting video generation...")
        click.echo(f"  Audio: {audio}")
        click.echo(f"  CSV: {csv}")
        click.echo(f"  Images: {images} ({input_mode} mode)")
        click.echo(f"  Output: {output}")
        click.echo(f"  Resolution: {resolution} ({RESOLUTION_MAP[resolution][0]}x{RESOLUTION_MAP[resolution][1]})")
        
        result = pipeline.run(progress_callback=lambda msg, pct: click.echo(f"  [{pct*100:5.1f}%] {msg}"))
        
        click.echo(f"\nSuccess! Video saved to: {result['output_path']}")
        
        if result.get("drive_path"):
            click.echo(f"Also saved to Drive: {result['drive_path']}")
        
        if verbose and result.get("report"):
            click.echo("\n--- Processing Report ---")
            click.echo(result["report"])
        
    except Exception as e:
        click.echo(f"\nError: {e}", err=True)
        if verbose:
            import traceback
            click.echo(traceback.format_exc(), err=True)
        sys.exit(1)


@cli.command()
@click.option(
    "--port", "-p",
    type=int,
    default=7860,
    help="Port to run web UI on"
)
@click.option(
    "--host", "-h",
    default="127.0.0.1",
    help="Host to bind to"
)
@click.option(
    "--share/--no-share",
    default=False,
    help="Create public shareable link"
)
def web(port: int, host: str, share: bool) -> None:
    """Launch Gradio web interface."""
    try:
        from audio_video_generator.web.gradio_ui import launch_ui
        click.echo(f"Starting web UI on http://{host}:{port}")
        launch_ui(host=host, port=port, share=share)
    except ImportError as e:
        click.echo(f"Error: Could not load web UI - {e}", err=True)
        sys.exit(1)


@cli.command()
def models() -> None:
    """List available Whisper models."""
    models_info = [
        ("tiny", "39 MB", "Fastest, lowest accuracy"),
        ("base", "74 MB", "Good balance (default)"),
        ("small", "244 MB", "Better accuracy"),
        ("medium", "769 MB", "High accuracy"),
        ("large", "1550 MB", "Best accuracy, slowest"),
    ]
    
    click.echo("Available Whisper models:")
    click.echo()
    
    for name, size, desc in models_info:
        marker = "  -> " if name == "base" else "     "
        click.echo(f"{marker}{name:8}  {size:10}  {desc}")
    
    click.echo()
    click.echo("Use with: avg generate --whisper-model <model>")


@cli.command()
def animations() -> None:
    """List available animations and transitions."""
    click.echo("Image Animations:")
    for anim in ANIMATION_OPTIONS:
        click.echo(f"  - {anim}")
    
    click.echo()
    click.echo("Image Transitions:")
    for trans in TRANSITION_OPTIONS:
        click.echo(f"  - {trans}")


def main() -> None:
    """Entry point for the CLI."""
    cli()


if __name__ == "__main__":
    main()