#!/usr/bin/env -S uv run
"""
browser-cli — Control your running browser from the terminal.
"""
import click
import sys
import os
import json
import stat
import shutil
import re
from importlib.metadata import PackageNotFoundError, version as package_version
from pathlib import Path
from rich.console import Console

from browser_cli.commands.navigate import nav_group
from browser_cli.commands.tabs import tabs_group
from browser_cli.commands.groups import group_group
from browser_cli.commands.windows import windows_group
from browser_cli.commands.dom import dom_group
from browser_cli.commands.extract import extract_group
from browser_cli.commands.session import session_group
from browser_cli.commands.search import search_group
from browser_cli.client import send_command, BrowserNotConnected

console = Console()

NATIVE_HOST_NAME = "com.browsercli.host"

NATIVE_HOST_DIRS = {
    "chrome": {
        "linux":  [Path.home() / ".config/google-chrome/NativeMessagingHosts"],
        "darwin": [Path.home() / "Library/Application Support/Google/Chrome/NativeMessagingHosts"],
    },
    "chromium": {
        "linux":  [Path.home() / ".config/chromium/NativeMessagingHosts"],
        "darwin": [Path.home() / "Library/Application Support/Chromium/NativeMessagingHosts"],
    },
    "brave": {
        "linux":  [Path.home() / ".config/BraveSoftware/Brave-Browser/NativeMessagingHosts"],
        "darwin": [Path.home() / "Library/Application Support/BraveSoftware/Brave-Browser/NativeMessagingHosts"],
    },
}


def _native_host_wrapper_path() -> Path:
    if sys.platform == "darwin":
        base_dir = Path.home() / "Library" / "Application Support" / "browser-cli"
    else:
        base_dir = Path(os.environ.get("XDG_DATA_HOME", Path.home() / ".local" / "share")) / "browser-cli"
    return base_dir / "libexec" / "native-host"


def _native_host_script_path() -> Path:
    return _native_host_wrapper_path().with_name("native_host.py")


def _project_version() -> str:
    pyproject_path = Path(__file__).resolve().parent.parent / "pyproject.toml"
    try:
        content = pyproject_path.read_text(encoding="utf-8")
        match = re.search(r'^version\s*=\s*"([^"]+)"', content, re.MULTILINE)
        if match:
            return match.group(1)
    except OSError:
        pass

    try:
        return package_version("browser-cli")
    except PackageNotFoundError:
        return "unknown"


def _print_version(ctx, param, value):
    if not value or ctx.resilient_parsing:
        return
    click.echo(_project_version())
    ctx.exit()


@click.group()
@click.option(
    "-V", "--version",
    is_flag=True,
    is_eager=True,
    expose_value=False,
    callback=_print_version,
    help="Show the browser-cli version and exit.",
)
@click.option(
    "--browser", default=None, metavar="ALIAS",
    help="Browser profile alias to target (required when multiple browsers are active).",
)
@click.pass_context
def main(ctx, browser):
    """Control your running browser from the terminal via a Chrome extension."""
    ctx.ensure_object(dict)
    if browser:
        os.environ["BROWSER_CLI_PROFILE"] = browser


# ── Sub-command groups ─────────────────────────────────────────────────────────
main.add_command(nav_group)
main.add_command(tabs_group)
main.add_command(group_group)
main.add_command(windows_group)
main.add_command(dom_group)
main.add_command(extract_group)
main.add_command(session_group)
main.add_command(search_group)


# ── clients ────────────────────────────────────────────────────────────────────

@main.command("clients")
def cmd_clients():
    """Show connected browser clients."""
    import json as _json
    from browser_cli.client import REGISTRY_PATH, DEFAULT_SOCKET

    # Build a map of profile → socket path from the registry
    profiles: dict[str, str] = {}
    if REGISTRY_PATH.exists():
        try:
            profiles = _json.loads(REGISTRY_PATH.read_text())
        except Exception:
            pass
    if not profiles:
        profiles = {"default": DEFAULT_SOCKET}

    all_clients = []
    for profile_name, sock_path in profiles.items():
        try:
            result = send_command("clients.list", profile=profile_name)
            for c in (result or []):
                c.setdefault("profile", profile_name)
                all_clients.append(c)
        except (BrowserNotConnected, RuntimeError):
            # Socket registered but browser no longer connected
            all_clients.append({"profile": profile_name, "name": "—", "version": "—", "platform": "disconnected"})

    if not all_clients:
        console.print("[yellow]No browser clients found[/yellow]")
        sys.exit(1)

    from rich.table import Table
    table = Table(show_header=True, header_style="bold cyan")
    table.add_column("Profile")
    table.add_column("Browser")
    table.add_column("Version")
    table.add_column("Platform")
    for c in all_clients:
        table.add_row(c.get("profile", "default"), c.get("name", ""), c.get("version", ""), c.get("platform", ""))
    console.print(table)


@main.command("rename-profile")
@click.argument("alias")
def cmd_rename_profile(alias):
    """Set the profile alias used to identify this browser instance."""
    try:
        send_command("clients.rename_profile", {"alias": alias})
    except BrowserNotConnected as e:
        console.print(f"[red]Error:[/red] {e}")
        sys.exit(1)
    console.print(f"[green]Profile renamed to '{alias}'[/green]")
    console.print("  Restart the browser for the change to take effect.")


# ── install ────────────────────────────────────────────────────────────────────

@main.command("install")
@click.argument("browser", type=click.Choice(["chrome", "chromium", "brave"]), default="chrome")
def cmd_install(browser):
    """Register the native messaging host and print extension load instructions."""

    # Install wrapper outside PATH — the browser uses the absolute path from the
    # native messaging manifest, so only `browser-cli` needs to be on PATH.
    wrapper_path = _native_host_wrapper_path()
    native_host_script_path = _native_host_script_path()
    wrapper_path.parent.mkdir(parents=True, exist_ok=True)
    shutil.copy2(Path(__file__).with_name("native_host.py"), native_host_script_path)
    native_host_script_path.chmod(
        native_host_script_path.stat().st_mode | stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH
    )
    wrapper_content = f'#!/bin/sh\nexec "{sys.executable}" "{native_host_script_path}" "$@"\n'
    wrapper_path.write_text(wrapper_content)
    wrapper_path.chmod(wrapper_path.stat().st_mode | stat.S_IEXEC | stat.S_IXGRP | stat.S_IXOTH)

    # Ask for extension ID
    ext_url = "brave://extensions" if browser == "brave" else "chrome://extensions"
    console.print("\n[bold]Step 1:[/bold] Load the extension in your browser")
    console.print(f"  1. Open [cyan]{ext_url}[/cyan]")
    console.print("  2. Enable [bold]Developer mode[/bold] (top-right toggle)")
    console.print(f"  3. Click [bold]Load unpacked[/bold] → select: [cyan]{Path(__file__).parent.parent / 'extension'}[/cyan]")
    console.print("  4. Copy the [bold]Extension ID[/bold] shown on the extension card\n")

    extension_id = click.prompt("Paste your extension ID here")
    extension_id = extension_id.strip()

    # Build native messaging manifest
    manifest = {
        "name": NATIVE_HOST_NAME,
        "description": "browser-cli native messaging host",
        "path": str(wrapper_path),
        "type": "stdio",
        "allowed_origins": [f"chrome-extension://{extension_id}/"],
    }

    # Write to OS native messaging dirs
    platform = "darwin" if sys.platform == "darwin" else "linux"
    dirs = NATIVE_HOST_DIRS[browser][platform]

    installed = []
    for d in dirs:
        try:
            d.mkdir(parents=True, exist_ok=True)
            manifest_path = d / f"{NATIVE_HOST_NAME}.json"
            manifest_path.write_text(json.dumps(manifest, indent=2))
            installed.append(manifest_path)
        except Exception as e:
            console.print(f"[yellow]Could not write to {d}: {e}[/yellow]")

    if not installed:
        console.print("[red]Failed to install native host manifest[/red]")
        sys.exit(1)

    for p in installed:
        console.print(f"[green]✓[/green] Wrote native host manifest: {p}")
    console.print(f"[green]✓[/green] Installed native host script: {native_host_script_path}")
    console.print(f"[green]✓[/green] Installed native host wrapper: {wrapper_path}")

    console.print("\n[bold]Step 2:[/bold] Restart Chrome completely (Cmd/Ctrl+Q, then reopen)")
    console.print("\n[green bold]✓ Installation complete![/green bold]")
    console.print("  After restarting Chrome, try: [cyan]browser-cli tabs list[/cyan]")


# ── native-host (hidden, called by Chrome via native messaging) ────────────────

@main.command("native-host", hidden=True)
def cmd_native_host():
    """Native messaging host — called by Chrome, not for direct use."""
    from browser_cli.native_host import main as _main
    _main()


# ── completion ─────────────────────────────────────────────────────────────────

@main.command("completion")
@click.argument("shell", type=click.Choice(["zsh", "bash", "fish"]))
@click.option("--script", is_flag=True, help="Output the raw completion script instead of instructions")
def cmd_completion(shell, script):
    """Print shell completion setup instructions (or output the script with --script)."""
    if script:
        from click.shell_completion import BashComplete, ZshComplete, FishComplete
        cls = {"zsh": ZshComplete, "bash": BashComplete, "fish": FishComplete}[shell]
        comp = cls(main, {}, "browser-cli", "_BROWSER_CLI_COMPLETE")
        click.echo(comp.source())
        return

    exe = sys.executable.replace("/python", "/browser-cli").replace("/python3", "/browser-cli")
    if not Path(exe).exists():
        exe = "browser-cli"

    env_var = "_BROWSER_CLI_COMPLETE"

    if shell == "zsh":
        console.print("[bold]Quickest setup — generate the file once:[/bold]")
        console.print()
        console.print(f"  [cyan]uv run browser-cli completion zsh --script > ~/.zfunc/_browser-cli[/cyan]")
        console.print()
        console.print("  Then add these lines to [bold]~/.zshrc[/bold] (before any compinit call):")
        console.print("    [cyan]fpath=(~/.zfunc $fpath)[/cyan]")
        console.print("    [cyan]autoload -Uz compinit && compinit[/cyan]")
        console.print()
        console.print("  Reload: [cyan]exec zsh[/cyan]")
        console.print()
        console.print("[bold]Alternative — eval on every shell start (simpler but slower):[/bold]")
        console.print(f'  [cyan]eval "$({env_var}=zsh_source {exe})"[/cyan]')
    elif shell == "bash":
        console.print("[bold]Quickest setup — generate the file once:[/bold]")
        console.print()
        console.print(f"  [cyan]uv run browser-cli completion bash --script > ~/.bash_completion.d/browser-cli[/cyan]")
        console.print()
        console.print("  Reload: [cyan]source ~/.bashrc[/cyan]")
        console.print()
        console.print("[bold]Alternative — eval on every shell start:[/bold]")
        console.print(f'  [cyan]eval "$({env_var}=bash_source {exe})"[/cyan]')
    elif shell == "fish":
        console.print("[bold]Setup:[/bold]")
        console.print()
        console.print(f"  [cyan]uv run browser-cli completion fish --script > ~/.config/fish/completions/browser-cli.fish[/cyan]")


if __name__ == "__main__":
    main()