"""CLI entry point for mcp-familywall.

Commands:
- setup  : Interactive credential setup; stores email+password in OS keyring.
- check  : Validate stored credentials against the Family Wall API.
- serve  : Start the MCP server (launched by Claude Desktop).
"""

from __future__ import annotations

import json
import shutil
import sys

import click

from mcp_familywall import __version__


@click.group(context_settings={"help_option_names": ["-h", "--help"]}, invoke_without_command=True)
@click.version_option(__version__, "-v", "--version", prog_name="mcp-familywall")
@click.pass_context
def app(ctx: click.Context) -> None:
    """mcp-familywall — MCP server for Family Wall (read-only)."""
    if ctx.invoked_subcommand is None:
        click.echo(ctx.get_help())


# ---------------------------------------------------------------------------
# setup
# ---------------------------------------------------------------------------


@app.command()
def setup() -> None:
    """Interactive credential setup.

    Prompts for email and password, verifies them against the Family Wall API,
    stores them in the OS keyring, and prints a Claude Desktop config snippet.
    """
    from mcp_familywall.auth import store_credentials
    from mcp_familywall.config import save_config
    from mcp_familywall.fw_client import FamilyWallClient, FamilyWallError

    click.echo("mcp-familywall setup\n")

    email = click.prompt("Family Wall E-Mail")
    password = click.prompt("Family Wall password", hide_input=True)

    # Verify credentials
    click.echo("\nVerifying credentials...")
    try:
        with FamilyWallClient() as client:
            client.login(email, password)
            client.logout()
    except FamilyWallError as exc:
        click.echo(click.style(f"Login failed: {exc}", fg="red"), err=True)
        sys.exit(1)
    except Exception as exc:
        click.echo(click.style(f"Connection error: {exc}", fg="red"), err=True)
        sys.exit(1)

    click.echo(click.style("Login successful!", fg="green"))

    # Store credentials
    ok = store_credentials(email, password)
    if ok:
        click.echo("Credentials stored in OS keyring.")
    else:
        click.echo(
            click.style("Keyring not available.", fg="yellow")
            + " Set environment variables instead:\n"
            f"  FW_EMAIL={email}\n"
            "  FW_PASSWORD=<your-password>"
        )

    # Ensure config file exists
    save_config()

    # Print Claude Desktop snippet
    _emit_claude_desktop_snippet()


# ---------------------------------------------------------------------------
# check
# ---------------------------------------------------------------------------


@app.command()
def check() -> None:
    """Validate stored credentials against the Family Wall API."""
    from mcp_familywall.auth import get_credentials
    from mcp_familywall.fw_client import FamilyWallClient, FamilyWallError

    click.echo("Checking Family Wall credentials...")

    try:
        email, password = get_credentials()
    except RuntimeError as exc:
        click.echo(click.style(f"Error: {exc}", fg="red"), err=True)
        sys.exit(1)

    click.echo(f"Email: {email}")

    try:
        with FamilyWallClient() as client:
            client.login(email, password)
            client.logout()
    except FamilyWallError as exc:
        click.echo(click.style(f"Authentication failed: {exc}", fg="red"), err=True)
        sys.exit(1)
    except Exception as exc:
        click.echo(click.style(f"Connection error: {exc}", fg="red"), err=True)
        sys.exit(1)

    click.echo(click.style("Authentication successful!", fg="green"))


# ---------------------------------------------------------------------------
# serve
# ---------------------------------------------------------------------------


@app.command()
def serve() -> None:
    """Start the MCP server (launched by Claude Desktop)."""
    from mcp_familywall.server import create_server

    server = create_server()
    server.run(transport="stdio")


# ---------------------------------------------------------------------------
# helpers
# ---------------------------------------------------------------------------


def _emit_claude_desktop_snippet() -> None:
    """Print a Claude Desktop JSON config snippet."""
    uvx_path = shutil.which("uvx") or "<path-to-uvx>"

    snippet = {
        "mcpServers": {
            "familywall": {
                "command": uvx_path,
                "args": ["mcp-familywall", "serve"],
            }
        }
    }
    click.echo("\nAdd this to your Claude Desktop config (claude_desktop_config.json):\n")
    click.echo(json.dumps(snippet, indent=2))