"""Main CLI entry point for shell-speak."""

import os
import sys
from typing import Optional

import typer
from rich.panel import Panel
from rich.text import Text

from shell_speak import __version__
from shell_speak.config import DEFAULT_TOOLS, ensure_data_dir, get_history_file
from shell_speak.history import get_history_manager
from shell_speak.interactive import run_interactive_mode
from shell_speak.library import get_loader
from shell_speak.matcher import get_matcher
from shell_speak.output import (
    console,
    display_command,
    display_error,
    display_history,
    display_info,
)
from shell_speak.models import CommandMatch

app = typer.Typer(
    name="shell-speak",
    add_completion=False,
    help="Convert natural language to shell commands",
)


def version_callback(value: bool):
    """Show version information."""
    if value:
        console.print(f"Shell Speak v{__version__}")
        raise typer.Exit()


@app.callback()
def main(
    version: bool = typer.Option(
        False,
        "--version",
        "-V",
        callback=version_callback,
        is_eager=True,
        help="Show version information",
    ),
):
    pass


@app.command()
def convert(
    query: str = typer.Argument(..., help="Natural language description of the command"),
    tool: Optional[str] = typer.Option(
        None,
        "--tool",
        "-t",
        help=f"Filter by tool: {', '.join(DEFAULT_TOOLS)}",
    ),
    explain: bool = typer.Option(
        False,
        "--explain",
        "-e",
        help="Show detailed explanation of the command",
    ),
    dry_run: bool = typer.Option(
        False,
        "--dry-run",
        "-n",
        help="Preview the command without executing",
    ),
):
    """Convert natural language to a shell command."""
    ensure_data_dir()

    matcher = get_matcher()
    match = matcher.match(query, tool)

    if match:
        display_command(match, explain=explain)

        if dry_run:
            display_info("Dry run - command not executed")
        else:
            display_info("Use --dry-run to preview without execution")
    else:
        display_error(f"Could not find a matching command for: '{query}'")
        display_info("Try using --tool to specify which tool you're using")


@app.command()
def interactive(
    interactive_mode: bool = typer.Option(
        False,
        "--interactive",
        "-i",
        is_eager=True,
        help="Enter interactive mode",
    ),
):
    """Enter interactive mode with history and auto-completion."""
    run_interactive_mode()


@app.command()
def history(
    limit: int = typer.Option(
        20,
        "--limit",
        "-l",
        help="Number of entries to show",
    ),
    tool: Optional[str] = typer.Option(
        None,
        "--tool",
        "-t",
        help=f"Filter by tool: {', '.join(DEFAULT_TOOLS)}",
    ),
    search: Optional[str] = typer.Option(
        None,
        "--search",
        "-s",
        help="Search history for query",
    ),
):
    """View command history."""
    ensure_data_dir()
    history_manager = get_history_manager()
    history_manager.load()

    if search:
        entries = history_manager.search(search, tool)
    else:
        entries = history_manager.get_recent(limit)

    if entries:
        display_history(entries, limit)
    else:
        display_info("No history entries found")


@app.command()
def learn(
    query: str = typer.Argument(..., help="The natural language query"),
    command: str = typer.Argument(..., help="The shell command to associate"),
    tool: str = typer.Option(
        "custom",
        "--tool",
        "-t",
        help=f"Tool category: {', '.join(DEFAULT_TOOLS)}",
    ),
):
    """Learn a new command pattern from your correction."""
    ensure_data_dir()
    loader = get_loader()
    loader.load_library()
    loader.add_correction(query, command, tool)
    display_info(f"Learned: '{query}' -> '{command}'")


@app.command()
def forget(
    query: str = typer.Argument(..., help="The query to forget"),
    tool: str = typer.Option(
        "custom",
        "--tool",
        "-t",
        help="Tool category",
    ),
):
    """Forget a learned pattern."""
    ensure_data_dir()
    loader = get_loader()
    loader.load_library()

    if loader.remove_correction(query, tool):
        display_info(f"Forgot pattern for: '{query}'")
    else:
        display_error(f"Pattern not found: '{query}'")


@app.command()
def reload():
    """Reload command libraries and corrections."""
    ensure_data_dir()
    loader = get_loader()
    loader.reload()
    display_info("Command libraries reloaded")


@app.command()
def tools():
    """List available tools."""
    console.print(Panel(
        Text("Available Tools", justify="center", style="bold cyan"),
        expand=False,
    ))
    for tool in DEFAULT_TOOLS:
        console.print(f"  [tool]{tool}[/]")


def main_entry():
    """Entry point for the CLI."""
    try:
        app()
    except KeyboardInterrupt:
        console.print("\n[info]Interrupted.[/]")
        sys.exit(130)
    except Exception as e:
        display_error(f"An error occurred: {e}")
        sys.exit(1)


if __name__ == "__main__":
    main_entry()