#!/usr/bin/env python3
"""
Webber CLI - Client for the Webber API.

Usage:
    webber-cli --help
    webber-cli chat [OPTIONS]
    webber-cli explore QUERY [OPTIONS]
"""
import asyncio
import os
import sys
from pathlib import Path

import typer
from rich.live import Live
from rich.markdown import Markdown
from rich.panel import Panel

from webber_cli.client import WebberClient
from webber_cli.theme import get_console, get_theme

app = typer.Typer(
    name="webber-cli",
    help="CLI client for the Webber API",
    no_args_is_help=True,
    add_completion=False,
)

console = get_console()

# Default API URL (can be overridden via env or option)
# Development port is 8095, production is 8086
DEFAULT_API_URL = os.environ.get("WEBBER_API_URL", "http://localhost:8095")


def version_callback(value: bool) -> None:
    """Display version and exit."""
    if value:
        from cli import __version__
        console.print(f"[title]webber-cli[/] version [success]{__version__}[/]")
        raise typer.Exit()


@app.callback()
def main(
    version: bool = typer.Option(
        False,
        "--version",
        "-v",
        callback=version_callback,
        is_eager=True,
        help="Show version and exit",
    ),
) -> None:
    """Webber CLI - Talk to the Webber API."""
    pass


@app.command()
def chat(
    directory: str = typer.Option(
        ".",
        "--directory",
        "-d",
        help="Working directory for exploration",
    ),
    api_url: str = typer.Option(
        DEFAULT_API_URL,
        "--api",
        "-a",
        help="Webber API URL",
    ),
    agent: str = typer.Option(
        "explore",
        "--agent",
        help="Agent to use",
    ),
    stream: bool = typer.Option(
        True,
        "--stream/--no-stream",
        "-s",
        help="Stream responses in real-time",
    ),
) -> None:
    """
    Start interactive chat session.

    Connects to the Webber API backend for agent execution.
    """
    working_dir = str(Path(directory).resolve())

    if not Path(working_dir).exists():
        console.print(f"[error]Error:[/] Directory not found: {working_dir}")
        raise typer.Exit(1)

    try:
        asyncio.run(_chat_loop(api_url, agent, working_dir, stream))
    except KeyboardInterrupt:
        console.print("\n[dim]Goodbye![/]")


async def _chat_loop(
    api_url: str, agent_type: str, working_dir: str, stream: bool = True
) -> None:
    """Interactive chat loop."""
    theme = get_theme()

    async with WebberClient(api_url) as client:
        # Check API health
        if not await client.health_check():
            console.print(f"[error]Error:[/] Cannot connect to Webber API at {api_url}")
            console.print("[dim]Make sure the server is running: ./wakeup.sh[/]")
            return

        # Get agent info
        agent_info = await client.get_agent(agent_type)
        if not agent_info:
            console.print(f"[error]Error:[/] Unknown agent: {agent_type}")
            agents = await client.list_agents()
            console.print("[dim]Available agents:[/]")
            for a in agents:
                console.print(f"  - {a.name}: {a.description}")
            return

        # Welcome message
        console.print()
        console.print(f"[title]Webber CLI[/] [dim]→ {api_url}[/]")
        console.print(f"[dim]Working in:[/] [path]{working_dir}[/]")
        console.print(f"[dim]Agent:[/] {agent_info.name} - {agent_info.description}")
        mode = "streaming" if stream else "batch"
        console.print(f"[dim]Mode:[/] {mode}")
        console.print()
        console.print("[dim]Type 'exit' to quit, 'clear' to clear screen.[/]")
        console.print()

        # Chat loop
        while True:
            try:
                user_input = console.input("[prompt]>[/] ").strip()

                if not user_input:
                    continue

                if user_input.lower() in ("exit", "quit", "/exit", "/quit"):
                    console.print("[dim]Goodbye![/]")
                    break

                if user_input.lower() in ("clear", "/clear"):
                    console.clear()
                    continue

                if user_input.lower().startswith("cd "):
                    new_dir = user_input[3:].strip()
                    new_path = Path(new_dir).resolve()
                    if new_path.exists() and new_path.is_dir():
                        working_dir = str(new_path)
                        console.print(f"[info]Changed to:[/] [path]{working_dir}[/]")
                    else:
                        console.print(f"[error]Directory not found:[/] {new_dir}")
                    continue

                console.print()

                if stream:
                    # Stream response in real-time
                    full_response = ""
                    try:
                        async for chunk in client.run_agent_stream(
                            agent_type, user_input, working_dir
                        ):
                            sys.stdout.write(chunk)
                            sys.stdout.flush()
                            full_response += chunk
                        console.print()  # Newline after streaming
                    except Exception as e:
                        console.print(f"\n[error]Stream error:[/] {e}")
                else:
                    # Batch mode with spinner
                    with console.status("[info]Thinking...[/]", spinner=theme.spinner):
                        result = await client.run_agent(agent_type, user_input, working_dir)

                    if result.success:
                        console.print(Markdown(result.response))
                    else:
                        console.print(f"[error]Error:[/] {result.error}")

                console.print()

            except KeyboardInterrupt:
                console.print("\n[dim]Use 'exit' to quit.[/]")

            except Exception as e:
                console.print(f"[error]Error:[/] {e}")


@app.command()
def explore(
    query: str = typer.Argument(..., help="What to search for"),
    directory: str = typer.Option(
        ".",
        "--directory",
        "-d",
        help="Working directory",
    ),
    api_url: str = typer.Option(
        DEFAULT_API_URL,
        "--api",
        "-a",
        help="Webber API URL",
    ),
    stream: bool = typer.Option(
        True,
        "--stream/--no-stream",
        "-s",
        help="Stream responses in real-time",
    ),
) -> None:
    """
    One-shot codebase exploration.

    Sends a query to the Webber API and displays the result.
    """
    working_dir = str(Path(directory).resolve())

    if not Path(working_dir).exists():
        console.print(f"[error]Error:[/] Directory not found: {working_dir}")
        raise typer.Exit(1)

    asyncio.run(_explore(api_url, query, working_dir, stream))


async def _explore(
    api_url: str, query: str, working_dir: str, stream: bool = True
) -> None:
    """Execute exploration query."""
    theme = get_theme()

    async with WebberClient(api_url) as client:
        # Check API health
        if not await client.health_check():
            console.print(f"[error]Error:[/] Cannot connect to Webber API at {api_url}")
            console.print("[dim]Make sure the server is running: ./wakeup.sh[/]")
            return

        console.print(f"[dim]Exploring:[/] [path]{working_dir}[/]")
        console.print(f"[dim]Query:[/] {query}")
        console.print()

        if stream:
            # Stream response in real-time
            try:
                async for chunk in client.run_agent_stream("explore", query, working_dir):
                    sys.stdout.write(chunk)
                    sys.stdout.flush()
                console.print()  # Newline after streaming
            except Exception as e:
                console.print(f"\n[error]Stream error:[/] {e}")
        else:
            # Batch mode with spinner
            with console.status("[info]Searching...[/]", spinner=theme.spinner):
                result = await client.run_agent("explore", query, working_dir)

            if result.success:
                console.print(Panel(
                    Markdown(result.response),
                    title="[success]Findings[/]",
                    border_style=theme.colors.border_success,
                ))
            else:
                console.print(Panel(
                    f"[error]{result.error}[/]",
                    title="[error]Error[/]",
                    border_style=theme.colors.border_error,
                ))


@app.command()
def status(
    api_url: str = typer.Option(
        DEFAULT_API_URL,
        "--api",
        "-a",
        help="Webber API URL",
    ),
) -> None:
    """Check API status and list available agents."""
    asyncio.run(_status(api_url))


async def _status(api_url: str) -> None:
    """Check API status."""
    async with WebberClient(api_url) as client:
        console.print(f"[dim]API URL:[/] {api_url}")

        if await client.health_check():
            console.print("[success]Status:[/] Connected")

            agents = await client.list_agents()
            console.print(f"\n[dim]Available agents ({len(agents)}):[/]")
            for agent in agents:
                console.print(f"  [info]{agent.name}[/]: {agent.description}")
        else:
            console.print("[error]Status:[/] Cannot connect")


if __name__ == "__main__":
    app()