"""剪辑计划 / 模板 config JSON 结构定义.

定义 EditPlan.config 和 EditTemplate.config 中 cover / title / subtitle / bgm
四个子结构的 Pydantic 模型，供 API 层做入参校验和默认值填充。

所有字段均有合理默认值，前端可只传需要修改的字段。
"""

from __future__ import annotations

import copy
from enum import Enum
from typing import Optional

from pydantic import BaseModel, Field

# ── 枚举类型 ──────────────────────────────────────────────────────────────────


class CoverType(str, Enum):
    """封面来源类型"""

    AI_FRAME = "ai_frame"  # AI 智能选帧
    MANUAL = "manual"  # 手动选择帧
    UPLOAD = "upload"  # 用户上传
    AI_REGENERATE = "ai_regenerate"  # AI 重新生成


class TextPosition(str, Enum):
    """文字位置"""

    TOP = "top"
    CENTER = "center"
    BOTTOM = "bottom"


class TextAnimation(str, Enum):
    """文字动画效果"""

    NONE = "none"
    FADE_IN = "fade_in"
    SLIDE_UP = "slide_up"
    SLIDE_DOWN = "slide_down"
    SCALE = "scale"


class BGMSource(str, Enum):
    """BGM 来源"""

    LIBRARY = "library"  # 素材库
    UPLOAD = "upload"  # 用户上传
    AI_RECOMMEND = "ai_recommend"  # AI 推荐


# ── 子结构模型 ────────────────────────────────────────────────────────────────


class StrokeConfig(BaseModel):
    """文字描边配置"""

    enabled: bool = Field(default=False, description="是否启用描边")
    color: str = Field(default="#000000", description="描边颜色 (HEX)")
    width: int = Field(default=1, ge=1, le=10, description="描边宽度")


class ShadowConfig(BaseModel):
    """文字阴影配置"""

    enabled: bool = Field(default=False, description="是否启用阴影")
    blur: int = Field(default=4, ge=0, le=20, description="模糊半径")
    offset_x: int = Field(default=2, description="X 偏移")
    offset_y: int = Field(default=2, description="Y 偏移")


class CoverConfig(BaseModel):
    """封面配置

    type 说明:
    - ai_frame: AI 从视频中智能选取最佳帧
    - manual: 用户手动指定 frame_time 处的帧
    - upload: 用户上传图片，image_url 为上传后的地址
    - ai_regenerate: AI 重新生成封面图
    """

    type: CoverType = Field(default=CoverType.AI_FRAME, description="封面来源类型")
    image_url: str = Field(default="", description="封面图片 URL")
    frame_time: Optional[float] = Field(default=None, ge=0.0, description="截取帧时间点 (秒)")


class TitleConfig(BaseModel):
    """标题配置"""

    enabled: bool = Field(default=True, description="是否显示标题")
    ai_auto: bool = Field(default=True, description="是否由 AI 自动生成标题文案")
    text: str = Field(default="", description="标题文案 (ai_auto=false 时由用户填写)")
    position: TextPosition = Field(default=TextPosition.TOP, description="标题位置")
    font: str = Field(default="思源黑体", description="字体名称")
    color: str = Field(default="#ffffff", description="文字颜色 (HEX)")
    size: int = Field(default=48, ge=12, le=120, description="字号")
    bold: bool = Field(default=True, description="是否加粗")
    italic: bool = Field(default=False, description="是否斜体")
    stroke: StrokeConfig = Field(default_factory=StrokeConfig, description="描边配置")
    shadow: ShadowConfig = Field(default_factory=ShadowConfig, description="阴影配置")


class SubtitleConfig(BaseModel):
    """字幕配置"""

    enabled: bool = Field(default=True, description="是否显示字幕")
    position: TextPosition = Field(default=TextPosition.BOTTOM, description="字幕位置")
    font: str = Field(default="思源黑体", description="字体名称")
    color: str = Field(default="#ffffff", description="文字颜色 (HEX)")
    size: int = Field(default=24, ge=12, le=60, description="字号")
    animation: TextAnimation = Field(default=TextAnimation.FADE_IN, description="入场动画")
    # ASR 自动字幕
    auto_generated: bool = Field(default=False, description="是否启用ASR自动生成字幕")
    language: str = Field(default="", description="字幕语言，空字符串表示自动检测（如 zh/en/ja）")
    max_chars_per_line: int = Field(default=20, ge=8, le=40, description="每行最多字符数")
    min_chars_per_segment: int = Field(default=8, ge=2, le=20, description="每段最少字符数（低于则合并）")


class BGMConfig(BaseModel):
    """BGM 配置"""

    enabled: bool = Field(default=False, description="是否启用 BGM")
    source: BGMSource = Field(default=BGMSource.LIBRARY, description="BGM 来源")
    asset_id: str = Field(default="", description="BGM 素材 ID（来源为 library/upload 时使用）")
    preset_id: str = Field(default="", description="预设 BGM ID（来源为 ai_recommend 或使用内置库时使用）")
    audio_url: str = Field(default="", description="BGM 音频 URL（外部直链，优先级最高）")
    volume: float = Field(default=0.3, ge=0.0, le=1.0, description="BGM 音量 (0.0 ~ 1.0)")
    fade_in: float = Field(default=0.0, ge=0.0, le=30.0, description="淡入时长（秒）")
    fade_out: float = Field(default=0.0, ge=0.0, le=30.0, description="淡出时长（秒）")
    loop_enabled: bool = Field(default=True, description="BGM 是否循环播放以铺满整个视频时长")
    sidechain_enabled: bool = Field(default=False, description="是否启用人声闪避（有人声时 BGM 自动降低音量）")
    sidechain_ratio: float = Field(
        default=0.3, ge=0.0, le=1.0, description="人声闪避时 BGM 音量降低比例（0.3 = 降低30%）"
    )
    sidechain_attack: float = Field(default=0.02, ge=0.001, le=1.0, description="人声闪避攻击时间（秒）")
    sidechain_release: float = Field(default=0.5, ge=0.01, le=5.0, description="人声闪避释放时间（秒）")
    sidechain_threshold: float = Field(default=-25.0, ge=-60.0, le=0.0, description="人声闪避触发阈值（dB）")


class ExportConfig(BaseModel):
    """导出配置

    视频输出参数设置。
    """

    resolution: str = Field(default="1080x1920", description="输出分辨率，如 1080x1920 / 720x1280 / 2160x3840")
    fps: int = Field(default=30, ge=15, le=60, description="输出帧率 15~60")
    video_bitrate: int = Field(default=8000, ge=1000, le=20000, description="视频码率（kbps）")
    audio_bitrate: int = Field(default=128, ge=64, le=320, description="音频码率（kbps）")
    format: str = Field(default="mp4", description="输出格式：mp4 / mov")
    quality_preset: str = Field(
        default="balanced",
        description="质量预设：ultra_fast / fast / balanced / high / best",
    )
    watermark_enabled: bool = Field(default=False, description="是否启用水印")
    watermark_text: str = Field(default="", description="水印文字")


class FilterConfig(BaseModel):
    """滤镜调色配置

    支持全局滤镜和按片段覆盖。
    强度 0-100，0 表示不应用，100 表示全量应用预设。
    """

    enabled: bool = Field(default=False, description="是否启用滤镜")
    preset_id: str = Field(default="filter_none", description="滤镜预设 ID")
    intensity: int = Field(default=100, ge=0, le=100, description="滤镜强度 0-100")
    # 自定义微调参数（在预设基础上叠加调整）
    brightness: float = Field(default=0.0, ge=-1.0, le=1.0, description="亮度微调")
    contrast: float = Field(default=1.0, ge=0.0, le=2.0, description="对比度微调（倍率）")
    saturation: float = Field(default=1.0, ge=0.0, le=3.0, description="饱和度微调（倍率）")
    warmth: float = Field(default=0.0, ge=-1.0, le=1.0, description="色温微调（正=暖，负=冷）")


# ── 完整 config 模型 ─────────────────────────────────────────────────────────


class EditPlanConfigSchema(BaseModel):
    """EditPlan.config 完整结构

    用于 API 层校验和默认值填充。所有子结构均可选，
    未传入时使用各自默认值。
    editing_mode 记录计划使用的剪辑模式。
    """

    cover: CoverConfig = Field(default_factory=CoverConfig, description="封面配置")
    title: TitleConfig = Field(default_factory=TitleConfig, description="标题配置")
    subtitle: SubtitleConfig = Field(default_factory=SubtitleConfig, description="字幕配置")
    bgm: BGMConfig = Field(default_factory=BGMConfig, description="BGM 配置")
    export: ExportConfig = Field(default_factory=ExportConfig, description="导出配置")
    filter: FilterConfig = Field(default_factory=FilterConfig, description="滤镜调色配置")
    editing_mode: str = Field(default="one_take", description="剪辑模式")


class EditTemplateConfigSchema(BaseModel):
    """EditTemplate.config 完整结构

    模板级别的默认配置，创建计划时可作为初始值继承。
    editing_mode 指定模板对应的剪辑模式，transition_enabled 控制是否启用转场。
    """

    cover: CoverConfig = Field(default_factory=CoverConfig, description="封面默认配置")
    title: TitleConfig = Field(default_factory=TitleConfig, description="标题默认配置")
    subtitle: SubtitleConfig = Field(default_factory=SubtitleConfig, description="字幕默认配置")
    bgm: BGMConfig = Field(default_factory=BGMConfig, description="BGM 默认配置")
    export: ExportConfig = Field(default_factory=ExportConfig, description="导出默认配置")
    filter: FilterConfig = Field(default_factory=FilterConfig, description="滤镜默认配置")
    editing_mode: str = Field(default="one_take", description="剪辑模式")
    transition_enabled: bool = Field(default=True, description="是否启用转场")


# ── 默认值常量 ────────────────────────────────────────────────────────────────

DEFAULT_EDIT_PLAN_CONFIG: dict = {
    "cover": {
        "type": "ai_frame",
        "image_url": "",
        "frame_time": None,
    },
    "title": {
        "enabled": True,
        "ai_auto": True,
        "text": "",
        "position": "top",
        "font": "思源黑体",
        "color": "#ffffff",
        "size": 48,
        "bold": True,
        "italic": False,
        "stroke": {"enabled": False, "color": "#000000", "width": 1},
        "shadow": {"enabled": False, "blur": 4, "offset_x": 2, "offset_y": 2},
    },
    "subtitle": {
        "enabled": True,
        "position": "bottom",
        "font": "思源黑体",
        "color": "#ffffff",
        "size": 24,
        "animation": "fade_in",
    },
    "bgm": {
        "enabled": False,
        "source": "library",
        "asset_id": "",
        "preset_id": "",
        "audio_url": "",
        "volume": 0.3,
        "fade_in": 0.0,
        "fade_out": 0.0,
        "loop_enabled": True,
        "sidechain_enabled": False,
        "sidechain_ratio": 0.3,
        "sidechain_attack": 0.02,
        "sidechain_release": 0.5,
        "sidechain_threshold": -25.0,
    },
    "export": {
        "resolution": "1080x1920",
        "fps": 30,
        "video_bitrate": 8000,
        "audio_bitrate": 128,
        "format": "mp4",
        "quality_preset": "balanced",
        "watermark_enabled": False,
        "watermark_text": "",
    },
    "filter": {
        "enabled": False,
        "preset_id": "filter_none",
        "intensity": 100,
        "brightness": 0.0,
        "contrast": 1.0,
        "saturation": 1.0,
        "warmth": 0.0,
    },
    "editing_mode": "one_take",
}

DEFAULT_EDIT_TEMPLATE_CONFIG: dict = {
    **DEFAULT_EDIT_PLAN_CONFIG,
    "transition_enabled": True,
}


# ── 工具函数 ──────────────────────────────────────────────────────────────────


def normalize_plan_config(raw: dict | None) -> dict:
    """将原始 config dict 标准化，填充缺失字段为默认值。

    用于创建/更新计划时确保 config 结构完整。
    """
    if raw is None:
        return copy.deepcopy(DEFAULT_EDIT_PLAN_CONFIG)

    base = copy.deepcopy(DEFAULT_EDIT_PLAN_CONFIG)

    for section_key in ("cover", "title", "subtitle", "bgm"):
        if section_key in raw and isinstance(raw[section_key], dict):
            if section_key not in base:
                base[section_key] = {}
            base[section_key].update(raw[section_key])

    # editing_mode 顶层字段
    if "editing_mode" in raw and isinstance(raw["editing_mode"], str):
        base["editing_mode"] = raw["editing_mode"]

    # 保留非标准字段（如 generation_task_id）
    for key, value in raw.items():
        if key not in ("cover", "title", "subtitle", "bgm", "editing_mode"):
            base[key] = value

    return base


def normalize_template_config(raw: dict | None) -> dict:
    """将模板原始 config dict 标准化。

    在 plan config 基础上额外支持 transition_enabled 字段。
    """
    if raw is None:
        return copy.deepcopy(DEFAULT_EDIT_TEMPLATE_CONFIG)

    base = copy.deepcopy(DEFAULT_EDIT_TEMPLATE_CONFIG)

    for section_key in ("cover", "title", "subtitle", "bgm"):
        if section_key in raw and isinstance(raw[section_key], dict):
            if section_key not in base:
                base[section_key] = {}
            base[section_key].update(raw[section_key])

    # 顶层字段
    if "editing_mode" in raw and isinstance(raw["editing_mode"], str):
        base["editing_mode"] = raw["editing_mode"]
    if "transition_enabled" in raw and isinstance(raw["transition_enabled"], bool):
        base["transition_enabled"] = raw["transition_enabled"]

    # 保留非标准字段
    for key, value in raw.items():
        if key not in ("cover", "title", "subtitle", "bgm", "editing_mode", "transition_enabled"):
            base[key] = value

    return base