"""Stable event models emitted by the local motion capture agent."""

from __future__ import annotations

import json
import time
from dataclasses import asdict, dataclass, field
from typing import Any, Literal

GestureName = Literal["rotate_left", "rotate_right", "zoom_in", "zoom_out", "confirm"]
GesturePhase = Literal["start", "active", "end", "discrete"]


def now_ms() -> int:
    return int(time.time() * 1000)


@dataclass(frozen=True)
class GestureEvent:
    gesture: GestureName
    phase: GesturePhase = "discrete"
    confidence: float = 1.0
    intensity: float = 1.0
    timestamp_ms: int = field(default_factory=now_ms)
    seq: int = 0
    source: str = "motion-agent"
    mode: str = "single"
    payload: dict[str, Any] = field(default_factory=dict)
    type: Literal["gesture"] = "gesture"

    def to_dict(self) -> dict[str, Any]:
        return asdict(self)

    def to_json(self) -> str:
        return json.dumps(self.to_dict(), ensure_ascii=False, separators=(",", ":"))


@dataclass(frozen=True)
class StatusEvent:
    connected: bool
    camera_count: int
    active_camera_ids: tuple[str, ...] = ()
    mode: str = "single"
    recognizer: str = "mediapipe-opencv"
    fps: float = 0.0
    last_gesture: str | None = None
    error: str | None = None
    timestamp_ms: int = field(default_factory=now_ms)
    source: str = "motion-agent"
    type: Literal["status"] = "status"

    def to_dict(self) -> dict[str, Any]:
        return asdict(self)

    def to_json(self) -> str:
        return json.dumps(self.to_dict(), ensure_ascii=False, separators=(",", ":"))


@dataclass(frozen=True)
class HeartbeatEvent:
    timestamp_ms: int = field(default_factory=now_ms)
    source: str = "motion-agent"
    type: Literal["heartbeat"] = "heartbeat"

    def to_dict(self) -> dict[str, Any]:
        return asdict(self)

    def to_json(self) -> str:
        return json.dumps(self.to_dict(), ensure_ascii=False, separators=(",", ":"))


@dataclass(frozen=True)
class SkeletonJoint:
    id: str
    x: float
    y: float
    confidence: float = 1.0


@dataclass(frozen=True)
class SkeletonEvent:
    joints: list[SkeletonJoint]
    bones: list[tuple[str, str]]
    matched_gesture: GestureName | None = None
    confidence: float = 0.0
    camera_id: str = "unknown"
    timestamp_ms: int = field(default_factory=now_ms)
    source: str = "motion-agent"
    mode: str = "single"
    type: Literal["skeleton"] = "skeleton"

    def to_dict(self) -> dict[str, Any]:
        return asdict(self)

    def to_json(self) -> str:
        return json.dumps(self.to_dict(), ensure_ascii=False, separators=(",", ":"))