"""CLI interface for Config Converter."""

import glob
import sys
from pathlib import Path
from typing import List, Optional

import click

from config_converter.converters import BaseConverter
from config_converter.generators import TypeScriptGenerator
from config_converter.validators import SchemaInferrer, SchemaValidator
from config_converter.utils import OutputFormatter


@click.group()
@click.option("--color/--no-color", default=True, help="Enable/disable colorized output")
@click.pass_context
def main(ctx: click.Context, color: bool) -> None:
    """Config Converter CLI - Convert configuration files between formats."""
    ctx.ensure_object(dict)
    ctx.obj["color"] = color
    ctx.obj["formatter"] = OutputFormatter(use_color=color)


@main.command("convert")
@click.argument("source", type=click.Path(exists=True))
@click.option("--from", "-f", "from_format", type=str, help="Source format (auto-detected if not specified)")
@click.option("--to", "-t", "to_format", required=True, type=click.Choice(["json", "yaml", "toml", "ini"]), help="Target format")
@click.option("--output", "-o", "output_path", type=click.Path(), help="Output file path (stdout if not specified)")
@click.option("--overwrite", "-w", is_flag=True, help="Overwrite output file if it exists")
@click.pass_context
def convert(
    ctx: click.Context,
    source: str,
    from_format: Optional[str],
    to_format: str,
    output_path: Optional[str],
    overwrite: bool,
) -> None:
    """Convert a configuration file from one format to another."""
    formatter: OutputFormatter = ctx.obj["formatter"]

    source_path = Path(source)

    if from_format is None:
        from_format = BaseConverter.guess_format(source_path)
        if from_format is None:
            formatter.print_error(f"Could not detect format from extension: {source_path.suffix}")
            sys.exit(1)

    try:
        source_converter = BaseConverter.get_converter(from_format)
        target_converter = BaseConverter.get_converter(to_format)
    except Exception as e:
        formatter.print_error(str(e))
        sys.exit(1)

    try:
        data = source_converter.read(source_path)
    except Exception as e:
        formatter.print_error(f"Failed to read {source}: {e}")
        sys.exit(1)

    if output_path:
        output_file = Path(output_path)
        if output_file.exists() and not overwrite:
            formatter.print_error(f"Output file already exists: {output_path}")
            sys.exit(1)
        try:
            target_converter.write(data, output_file)
            formatter.print_success(f"Converted {source} ({from_format}) → {output_path} ({to_format})")
        except Exception as e:
            formatter.print_error(f"Failed to write {output_path}: {e}")
            sys.exit(1)
    else:
        try:
            output = target_converter.format(data)
            click.echo(output)
        except Exception as e:
            formatter.print_error(f"Failed to format output: {e}")
            sys.exit(1)


@main.command("batch")
@click.argument("pattern", type=str)
@click.option("--from", "-f", "from_format", type=str, help="Source format (auto-detected if not specified)")
@click.option("--to", "-t", "to_format", required=True, type=click.Choice(["json", "yaml", "toml", "ini"]), help="Target format")
@click.option("--output-dir", "-o", "output_dir", type=click.Path(), help="Output directory for converted files")
@click.option("--overwrite", "-w", is_flag=True, help="Overwrite output files if they exist")
@click.pass_context
def batch_convert(
    ctx: click.Context,
    pattern: str,
    from_format: Optional[str],
    to_format: str,
    output_dir: Optional[str],
    overwrite: bool,
) -> None:
    """Convert multiple files matching a glob pattern."""
    formatter: OutputFormatter = ctx.obj["formatter"]

    files = glob.glob(pattern)
    if not files:
        formatter.print_error(f"No files found matching pattern: {pattern}")
        sys.exit(1)

    try:
        BaseConverter.get_converter(to_format)
    except Exception as e:
        formatter.print_error(str(e))
        sys.exit(1)

    if output_dir:
        Path(output_dir).mkdir(parents=True, exist_ok=True)

    success_count = 0
    failed_count = 0
    failed_files: List[str] = []

    for file_path in files:
        source_path = Path(file_path)

        try:
            if from_format is None:
                fmt = BaseConverter.guess_format(source_path)
                if fmt is None:
                    failed_count += 1
                    failed_files.append(file_path)
                    continue
            else:
                fmt = from_format

            converter = BaseConverter.get_converter(fmt)
            data = converter.read(source_path)

            if output_dir:
                output_path = Path(output_dir) / f"{source_path.stem}.{to_format}"
                if output_path.exists() and not overwrite:
                    failed_count += 1
                    failed_files.append(file_path)
                    continue
                converter.write(data, output_path)
            else:
                formatter.print_error("Output directory required for batch conversion")
                failed_count += 1
                failed_files.append(file_path)
                continue

            success_count += 1

        except Exception:
            failed_count += 1
            failed_files.append(file_path)

    formatter.print_info(f"Batch conversion complete: {success_count} succeeded, {failed_count} failed")

    if failed_files:
        formatter.print_warning("Failed files:")
        for f in failed_files:
            formatter.print_warning(f"  - {f}")


@main.command("infer")
@click.argument("source", type=click.Path(exists=True))
@click.option("--format", "-f", "fmt", type=str, help="Input format (auto-detected if not specified)")
@click.option("--table", "-t", is_flag=True, help="Display as table")
@click.option("--tree", is_flag=True, help="Display as tree")
@click.pass_context
def infer_schema(
    ctx: click.Context,
    source: str,
    fmt: Optional[str],
    table: bool,
    tree: bool,
) -> None:
    """Infer schema from a configuration file."""
    formatter: OutputFormatter = ctx.obj["formatter"]
    source_path = Path(source)

    if fmt is None:
        fmt = BaseConverter.guess_format(source_path)
        if fmt is None:
            formatter.print_error(f"Could not detect format from extension: {source_path.suffix}")
            sys.exit(1)

    try:
        converter = BaseConverter.get_converter(fmt)
        data = converter.read(source_path)
    except Exception as e:
        formatter.print_error(f"Failed to read {source}: {e}")
        sys.exit(1)

    inferrer = SchemaInferrer()
    schema = inferrer.infer(data)
    schema_dict = schema.to_dict()

    if table:
        formatter.print_schema_table(schema_dict)
    elif tree:
        formatter.print_schema_tree(schema_dict)
    else:
        import json
        click.echo(json.dumps(schema_dict, indent=2))


@main.command("validate")
@click.argument("source", type=click.Path(exists=True))
@click.option("--format", "-f", "fmt", type=str, help="Input format (auto-detected if not specified)")
@click.pass_context
def validate(
    ctx: click.Context,
    source: str,
    fmt: Optional[str],
) -> None:
    """Validate a configuration file against its inferred schema."""
    formatter: OutputFormatter = ctx.obj["formatter"]
    source_path = Path(source)

    if fmt is None:
        fmt = BaseConverter.guess_format(source_path)
        if fmt is None:
            formatter.print_error(f"Could not detect format from extension: {source_path.suffix}")
            sys.exit(1)

    try:
        converter = BaseConverter.get_converter(fmt)
        data = converter.read(source_path)
    except Exception as e:
        formatter.print_error(f"Failed to read {source}: {e}")
        sys.exit(1)

    inferrer = SchemaInferrer()
    schema = inferrer.infer(data)

    validator = SchemaValidator(schema)
    is_valid, errors = validator.validate(data)

    if is_valid:
        formatter.print_success(f"Validation passed: {source}")
    else:
        formatter.print_error(f"Validation failed: {source}")
        for error in errors:
            formatter.print_error(f"  - {error}")
        sys.exit(1)


@main.command("generate-ts")
@click.argument("source", type=click.Path(exists=True))
@click.option("--format", "-f", "fmt", type=str, help="Input format (auto-detected if not specified)")
@click.option("--interface", "-i", "interface_name", default="Config", help="Name for the generated interface")
@click.option("--output", "-o", "output_path", type=click.Path(), help="Output file path (stdout if not specified)")
@click.pass_context
def generate_typescript(
    ctx: click.Context,
    source: str,
    fmt: Optional[str],
    interface_name: str,
    output_path: Optional[str],
) -> None:
    """Generate TypeScript interfaces from a configuration file."""
    formatter: OutputFormatter = ctx.obj["formatter"]
    source_path = Path(source)

    if fmt is None:
        fmt = BaseConverter.guess_format(source_path)
        if fmt is None:
            formatter.print_error(f"Could not detect format from extension: {source_path.suffix}")
            sys.exit(1)

    try:
        converter = BaseConverter.get_converter(fmt)
        data = converter.read(source_path)
    except Exception as e:
        formatter.print_error(f"Failed to read {source}: {e}")
        sys.exit(1)

    generator = TypeScriptGenerator(interface_name=interface_name)
    ts_output = generator.generate(data)

    if output_path:
        try:
            with open(output_path, "w", encoding="utf-8") as f:
                f.write(ts_output)
            formatter.print_success(f"Generated TypeScript interfaces: {output_path}")
        except Exception as e:
            formatter.print_error(f"Failed to write {output_path}: {e}")
            sys.exit(1)
    else:
        click.echo(ts_output)


@main.command("interactive")
@click.pass_context
def interactive(ctx: click.Context) -> None:
    """Enter interactive mode for guided conversion."""
    formatter: OutputFormatter = ctx.obj["formatter"]

    formatter.print_title("Config Converter - Interactive Mode")

    supported_formats = BaseConverter.get_supported_formats()
    formatter.print_info(f"Supported formats: {', '.join(supported_formats)}")

    source = click.prompt("Source file path", type=click.Path(exists=True))
    source_format = click.prompt("Source format (or press Enter for auto-detect)", type=str, default="", show_default=False)

    if not source_format:
        source_format = BaseConverter.guess_format(source)
        if source_format is None:
            formatter.print_error("Could not detect format. Please specify manually.")
            return

    target_format = click.prompt("Target format", type=click.Choice(supported_formats))

    output_path = click.prompt("Output file path (or press Enter for stdout)", type=str, default="", show_default=False)

    ctx.invoke(
        convert,
        source=source,
        from_format=source_format,
        to_format=target_format,
        output_path=output_path if output_path else None,
        overwrite=True,
    )


@main.command("formats")
@click.pass_context
def list_formats(ctx: click.Context) -> None:
    """List all supported formats."""
    formatter: OutputFormatter = ctx.obj["formatter"]
    supported = BaseConverter.get_supported_formats()
    formatter.print_info("Supported formats:")
    for fmt in supported:
        formatter.print_info(f"  - {fmt}")


if __name__ == "__main__":
    main()