"""TTS 配音配置模型."""

from __future__ import annotations

from dataclasses import dataclass
from typing import Any, Optional


@dataclass(slots=True)
class TtsConfig:
    """TTS 配音配置.

    Attributes:
        enabled: 是否启用配音
        voice_id: 音色 ID
        speed: 语速 (0.5 ~ 2.0)
        pitch: 语调 (-12 ~ 12 半音)
        volume: 音量 (0.0 ~ 1.0)
        text: 配音文本（整段配音时使用）
        align_mode: 对齐模式 - "subtitle"=按字幕对齐 / "full"=整段配音
        overlap_mode: 与原音的叠加模式 - "replace"=替换 / "mix"=混音
    """

    enabled: bool = False
    voice_id: str = ""
    speed: float = 1.0
    pitch: float = 0.0
    volume: float = 0.8
    text: str = ""
    align_mode: str = "full"  # subtitle / full
    overlap_mode: str = "replace"  # replace / mix

    @classmethod
    def parse(cls, data: Optional[dict[str, Any]]) -> "TtsConfig":
        """从 dict 解析配置，无效值回退到默认."""
        if not data or not isinstance(data, dict):
            return cls()

        enabled = data.get("enabled", False)
        if not isinstance(enabled, bool):
            enabled = False

        if not enabled:
            return cls(enabled=False)

        voice_id = data.get("voice_id", "")
        if not isinstance(voice_id, str):
            voice_id = ""

        speed = data.get("speed", 1.0)
        if not isinstance(speed, (int, float)):
            speed = 1.0

        pitch = data.get("pitch", 0.0)
        if not isinstance(pitch, (int, float)):
            pitch = 0.0

        volume = data.get("volume", 0.8)
        if not isinstance(volume, (int, float)):
            volume = 0.8

        text = data.get("text", "")
        if not isinstance(text, str):
            text = ""

        align_mode = data.get("align_mode", "full")
        if align_mode not in ("subtitle", "full"):
            align_mode = "full"

        overlap_mode = data.get("overlap_mode", "replace")
        if overlap_mode not in ("replace", "mix"):
            overlap_mode = "replace"

        config = cls(
            enabled=enabled,
            voice_id=voice_id,
            speed=float(speed),
            pitch=float(pitch),
            volume=float(volume),
            text=text,
            align_mode=align_mode,
            overlap_mode=overlap_mode,
        )
        config._clamp()
        return config

    def _clamp(self) -> None:
        """边界钳制."""
        if self.speed < 0.5:
            self.speed = 0.5
        elif self.speed > 2.0:
            self.speed = 2.0

        if self.pitch < -12:
            self.pitch = -12
        elif self.pitch > 12:
            self.pitch = 12

        if self.volume < 0.0:
            self.volume = 0.0
        elif self.volume > 1.0:
            self.volume = 1.0