from flask import Blueprint, request, jsonify, Response
from datetime import datetime, timezone
from typing import Dict, Any, Tuple

from models.state import video_state

watchparty_bp = Blueprint("watchparty", __name__)


@watchparty_bp.route("/watchparty/<room>/video", methods=["GET", "POST"])
def watchparty_video_control(room: str) -> Tuple[Response, int] | Response:
    room = room.strip()
    video_state.setdefault(room, {})

    if request.method == "POST":
        data: Dict[str, Any] = request.get_json() or {}
        url: str = data.get("url", "").strip()
        if not url:
            return jsonify({"error": "No video URL"}), 400

        video_state[room] = {
            "url": url,
            "started_at": datetime.now(timezone.utc).isoformat(),
            "is_paused": False,
            "is_active": True,
        }

        return jsonify({"status": "started", "url": url})

    # GET: return URL, elapsed time, is_paused, is_active
    video_data = video_state.get(room, {})
    if not video_data or "url" not in video_data:
        return jsonify({"is_active": False, "url": None, "elapsed": 0, "is_paused": False})

    try:
        is_paused = video_data.get("is_paused", False)
        if is_paused:
            elapsed = video_data.get("elapsed_at_pause", 0)
        else:
            start_time = datetime.fromisoformat(video_data["started_at"])
            elapsed = (datetime.now(timezone.utc) - start_time).total_seconds()

        return jsonify(
            {
                "url": video_data["url"],
                "elapsed": max(0, int(elapsed)),
                "is_paused": is_paused,
                "is_active": video_data.get("is_active", True),
            }
        )
    except Exception:
        return jsonify({"is_active": False, "url": None, "elapsed": 0, "is_paused": False})


@watchparty_bp.route("/watchparty/<room>/video/clear", methods=["POST"])
def clear_watchparty_video(room: str) -> Response:
    room = room.strip()
    video_state.pop(room, None)
    return jsonify({"status": "cleared"})


@watchparty_bp.route("/watchparty/<room>/video/pause", methods=["POST"])
def watchparty_pause_video(room: str) -> Response:
    room = room.strip()
    state = video_state.get(room)
    if not state or state.get("is_paused"):
        return jsonify({"status": "ignored"})

    start_time = datetime.fromisoformat(state["started_at"])
    elapsed = (datetime.now(timezone.utc) - start_time).total_seconds()

    state["is_paused"] = True
    state["elapsed_at_pause"] = max(0, int(elapsed))

    return jsonify({"status": "paused"})


@watchparty_bp.route("/watchparty/<room>/video/resume", methods=["POST"])
def watchparty_resume_video(room: str) -> Response:
    room = room.strip()
    state = video_state.get(room)
    if not state or not state.get("is_paused"):
        return jsonify({"status": "ignored"})

    elapsed = state.get("elapsed_at_pause", 0)
    new_start_timestamp = datetime.now(timezone.utc).timestamp() - elapsed

    state["started_at"] = datetime.fromtimestamp(new_start_timestamp, timezone.utc).isoformat()
    state["is_paused"] = False
    state.pop("elapsed_at_pause", None)

    return jsonify({"status": "resumed"})


@watchparty_bp.route("/watchparty/<room>/video/toggle", methods=["POST"])
def watchparty_toggle_video(room: str) -> Response:
    room = room.strip()
    data: Dict[str, Any] = request.get_json() or {}
    state = video_state.setdefault(room, {})
    
    if "is_active" in data:
        state["is_active"] = bool(data["is_active"])
    else:
        state["is_active"] = not state.get("is_active", False)

    return jsonify({"status": "toggled", "is_active": state["is_active"]})