"""Entry point for Matrix bot frontend."""

import asyncio
import logging
import os
import sys
from pathlib import Path

import httpx
import yaml

from core.config import Config
from core.matrix_bot import MatrixBot


def _load_dotenv(workspace: Path) -> None:
    env_file = workspace / ".env"
    if not env_file.exists():
        return
    for line in env_file.read_text().splitlines():
        line = line.strip()
        if not line or line.startswith("#") or "=" not in line:
            continue
        key, _, value = line.partition("=")
        key = key.strip()
        value = value.strip().strip('"').strip("'")
        if key not in os.environ:
            os.environ[key] = value


def _load_users(workspace: Path) -> dict[str, dict]:
    """Load users.yml from workspace. Returns {mxid: {profile: ...}}."""
    users_file = workspace / "users.yml"
    if not users_file.exists():
        return {}
    with open(users_file) as f:
        data = yaml.safe_load(f) or {}
    return data


async def main() -> None:
    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s %(name)s %(levelname)s %(message)s",
        datefmt="%Y-%m-%d %H:%M:%S",
    )

    workspace_dir = os.environ.get("WORKSPACE_DIR")
    if workspace_dir:
        _load_dotenv(Path(workspace_dir))

    # MATRIX_DATA_DIR overrides DATA_DIR for Matrix bot
    matrix_data_dir = os.environ.get("MATRIX_DATA_DIR")
    if matrix_data_dir:
        os.environ["DATA_DIR"] = matrix_data_dir

    # Matrix-specific env vars
    homeserver = os.environ.get("MATRIX_HOMESERVER")
    user_id = os.environ.get("MATRIX_USER_ID")
    access_token = os.environ.get("MATRIX_ACCESS_TOKEN")
    owner_mxid = os.environ.get("MATRIX_OWNER_MXID", "")
    admin_mxid = os.environ.get("MATRIX_ADMIN_MXID", "")  # For admin notifications

    if not all([homeserver, user_id, access_token]):
        logging.error(
            "Missing Matrix config. Need: MATRIX_HOMESERVER, MATRIX_USER_ID, "
            "MATRIX_ACCESS_TOKEN"
        )
        sys.exit(1)

    # Resolve device_id from server (must match access token)
    async with httpx.AsyncClient() as http:
        resp = await http.get(
            f"{homeserver}/_matrix/client/v3/account/whoami",
            headers={"Authorization": f"Bearer {access_token}"},
            timeout=10,
        )
        if resp.status_code != 200:
            logging.error("whoami failed (%d): %s", resp.status_code, resp.text)
            sys.exit(1)
        device_id = resp.json().get("device_id")
        logging.info("Resolved device_id: %s", device_id)

    # Load users map (multi-user mode)
    users = {}
    if workspace_dir:
        users = _load_users(Path(workspace_dir))
    if not users and not owner_mxid:
        logging.error("Need either users.yml in workspace or MATRIX_OWNER_MXID env var")
        sys.exit(1)

    try:
        config = Config.from_env()
    except ValueError as e:
        logging.error("Config error: %s", e)
        sys.exit(1)

    if config.workspace_dir:
        logging.info("Workspace: %s", config.workspace_dir)
        # Symlink workspace CLAUDE.md into data dir
        claude_md_link = config.data_dir / "CLAUDE.md"
        claude_md_src = config.workspace_dir / "CLAUDE.md"
        if claude_md_src.exists() and not claude_md_link.exists():
            claude_md_link.symlink_to(claude_md_src)
            logging.info("Symlinked CLAUDE.md into data dir")

    if users:
        logging.info("Multi-user mode: %d users", len(users))
    logging.info("Data dir: %s", config.data_dir)

    bot = MatrixBot(config, homeserver, user_id, access_token,
                    owner_mxid=owner_mxid, users=users, device_id=device_id,
                    admin_mxid=admin_mxid)
    try:
        await bot.run()
    except KeyboardInterrupt:
        pass
    finally:
        await bot.close()


if __name__ == "__main__":
    asyncio.run(main())