"""
爽文（Fiction / Novel）数据模型。
"""
from __future__ import annotations

from typing import Dict, List, Optional

from pydantic import BaseModel, Field


class EmotionFlowStep(BaseModel):
    key: str
    text: str


class EmotionFlow(BaseModel):
    id: str
    intro: str
    tags: List[str] = Field(default_factory=list)
    steps: List[EmotionFlowStep] = Field(default_factory=list)


class EmotionFlowCatalog(BaseModel):
    flows: List[EmotionFlow] = Field(default_factory=list)


class GuideGlobalEntry(BaseModel):
    layer: str
    title: str
    content: str


class GuideGlobalEntries(BaseModel):
    entries: List[GuideGlobalEntry] = Field(default_factory=list)


class FictionGuideWorldbook(BaseModel):
    """Book-local guide 世界书：本书具体人设 / 爽点 / 用户体验 / 禁区。"""

    persona: str = ""
    highlight: str = ""
    experience: str = ""
    forbiddenZones: str = ""


class FictionBookMeta(BaseModel):
    id: str
    title: str
    allowedFlowIds: List[str] = Field(default_factory=list)
    createdAt: str = ""
    updatedAt: str = ""


class FictionBookSummary(BaseModel):
    id: str
    title: str
    allowedFlowIds: List[str] = Field(default_factory=list)
    updatedAt: str = ""


class FictionPrompts(BaseModel):
    openBook: str = ""
    coarseOutline: str = ""
    eventPlan: str = ""
    chapter: str = ""
    nudge: str = ""


class FictionReaderSettings(BaseModel):
    contextWindowChars: int = 2000
    prefetchRemainingWords: int = 300


class FictionPipelineSettings(BaseModel):
    """半自动流水线：各层 ON=自动，OFF=需手动触发。"""

    semiAuto: bool = False
    autoCoarse: bool = True
    autoEventPlan: bool = True
    autoChapter: bool = True


class FictionBookSettings(BaseModel):
    prompts: FictionPrompts = Field(default_factory=FictionPrompts)
    reader: FictionReaderSettings = Field(default_factory=FictionReaderSettings)
    pipeline: FictionPipelineSettings = Field(default_factory=FictionPipelineSettings)


class CreateFictionBookRequest(BaseModel):
    title: str
    inspiration: str = ""
    guide: FictionGuideWorldbook
    allowedFlowIds: List[str] = Field(default_factory=list)


class OpenBookRequest(BaseModel):
    inspiration: str
    profile_id: Optional[str] = None
    api_config: Optional[Dict[str, str]] = None


class OpenBookResult(BaseModel):
    title: str
    optimizedIntro: str
    guide: FictionGuideWorldbook
    allowedFlowIds: List[str] = Field(default_factory=list)


class UpdateFictionBookSettingsRequest(BaseModel):
    prompts: Optional[FictionPrompts] = None
    reader: Optional[FictionReaderSettings] = None
    pipeline: Optional[FictionPipelineSettings] = None


class FictionPipelineTickResult(BaseModel):
    run: FictionRunState
    started: bool = False
    pendingStages: List[str] = Field(default_factory=list)


class VolumeOutline(BaseModel):
    """卷纲：当前 10~30 章的阶段规划，不是整本书全局大纲。"""

    id: str
    order: int = 1
    title: str = ""
    goal: str = ""
    coreConflict: str = ""
    powerProgression: str = ""
    emotionalPromise: str = ""
    endingHook: str = ""
    targetChapterCount: int = 20
    primaryEmotionFlowId: str = ""
    status: str = "active"


class CoarseOutlineEvent(BaseModel):
    """兼容旧 coarseOutline.events，同时作为新版事件串条目的轻量视图。"""

    id: str
    title: str
    summary: str = ""
    order: int = 1
    volumeId: str = ""


class CoarseOutline(BaseModel):
    events: List[CoarseOutlineEvent] = Field(default_factory=list)
    version: int = 1


class EventChainItem(BaseModel):
    """事件串：卷纲 + 情感链在剧情层的落地。"""

    id: str
    volumeId: str = ""
    order: int = 1
    title: str = ""
    summary: str = ""
    purpose: str = ""
    conflict: str = ""
    turningPoint: str = ""
    expectedPayoff: str = ""
    targetChapterCount: int = 3
    emotionFlowId: str = ""
    emotionStepKey: str = ""
    emotionStepText: str = ""
    status: str = "planned"


class FlowStepsPlan(BaseModel):
    起: str = ""
    承: str = ""
    转: str = ""
    合: str = ""


class ChapterPlanItem(BaseModel):
    seq: int

    # 旧字段：保留以兼容现有 metadata.events[eventId].chapterPlan。
    phaseKey: str = ""
    phaseSlice: str = ""
    brief: str = ""

    # 新字段：章纲是写章前最具体的规划层。
    eventId: str = ""
    title: str = ""
    goal: str = ""
    opening: str = ""
    mainConflict: str = ""
    emotionalTurn: str = ""
    emotionStepKey: str = ""
    emotionGoal: str = ""
    payoff: str = ""
    endingHook: str = ""
    forbidden: str = ""
    targetWords: int = 2000

    status: str = "planned"


class EventPlanEntry(BaseModel):
    emotionFlowId: str = ""
    flowStepsPlan: FlowStepsPlan = Field(default_factory=FlowStepsPlan)
    chapterPlan: List[ChapterPlanItem] = Field(default_factory=list)


class FictionProgress(BaseModel):
    currentChapterSeq: int = 0
    charOffset: int = 0
    ttsPaused: bool = False
    genPaused: bool = False


class FictionChapter(BaseModel):
    seq: int
    title: str = ""
    body: str = ""
    charCount: int = 0
    status: str = "written"
    eventId: str = ""
    phaseKey: str = ""
    createdAt: str = ""


class FictionChapterSummary(BaseModel):
    seq: int
    title: str = ""
    charCount: int = 0
    eventId: str = ""
    phaseKey: str = ""


class FictionBookMetadata(BaseModel):
    # v2 新规划结构：不再保留旧 coarseOutline/events 作为持久化主结构。
    version: int = 2
    volumes: List[VolumeOutline] = Field(default_factory=list)
    eventChains: Dict[str, List[EventChainItem]] = Field(default_factory=dict)
    chapterPlans: Dict[str, List[ChapterPlanItem]] = Field(default_factory=dict)
    progress: FictionProgress = Field(default_factory=FictionProgress)


class FictionRunState(BaseModel):
    status: str = "idle"
    pipelineStage: Optional[str] = None
    stage: str = "idle"
    message: Optional[str] = None
    progress: Optional[Dict[str, int]] = None
    updatedAt: str = ""


class FictionStartReadingResult(BaseModel):
    run: FictionRunState
    started: bool = False


class FictionGenerationRequest(BaseModel):
    profile_id: Optional[str] = None
    api_config: Optional[Dict[str, str]] = None
    event_id: Optional[str] = None
    seq: Optional[int] = None
    stream: bool = False


class UpdateFictionProgressRequest(BaseModel):
    currentChapterSeq: Optional[int] = None
    charOffset: Optional[int] = None
    ttsPaused: Optional[bool] = None
    genPaused: Optional[bool] = None


class FictionPrefetchRequest(BaseModel):
    profile_id: Optional[str] = None
    api_config: Optional[Dict[str, str]] = None
    currentChapterSeq: int
    charOffset: int = 0
    remainingWords: Optional[int] = None


class FictionPrefetchResult(BaseModel):
    run: FictionRunState
    started: bool = False
    targetSeq: Optional[int] = None
    skippedReason: Optional[str] = None