from pydantic import BaseModel
from typing import Optional, List, Dict
from enum import Enum


class AttributeNode(BaseModel):
    name: str
    category: Optional[str] = None  # 材料, 功能, 用途, 使用族群
    children: Optional[List["AttributeNode"]] = None


AttributeNode.model_rebuild()


class AnalyzeRequest(BaseModel):
    query: str
    model: Optional[str] = None
    temperature: Optional[float] = 0.7
    categories: Optional[List[str]] = None  # 如果為 None，使用預設類別


class AnalyzeResponse(BaseModel):
    query: str
    attributes: AttributeNode


class ModelListResponse(BaseModel):
    models: List[str]


# ===== Multi-step streaming schemas =====

class Step1Result(BaseModel):
    """Step 1 的結果：各類別屬性列表"""
    materials: List[str]
    functions: List[str]
    usages: List[str]
    users: List[str]


class CausalChain(BaseModel):
    """單條因果鏈"""
    material: str
    function: str
    usage: str
    user: str


class StreamAnalyzeRequest(BaseModel):
    """多步驟分析請求（更新為支持動態類別）"""
    query: str
    model: Optional[str] = None
    temperature: Optional[float] = 0.7
    chain_count: int = 5  # 用戶可設定要生成多少條因果鏈

    # 新增：動態類別支持
    category_mode: Optional[str] = "dynamic_auto"  # CategoryMode enum 值
    custom_categories: Optional[List[str]] = None
    suggested_category_count: int = 3  # 建議 LLM 生成的類別數量


class StreamAnalyzeResponse(BaseModel):
    """最終完整結果"""
    query: str
    step1_result: Step1Result
    causal_chains: List[CausalChain]
    attributes: AttributeNode


# ===== Dynamic category system schemas =====

class CategoryMode(str, Enum):
    """類別模式"""
    FIXED_ONLY = "fixed_only"
    FIXED_PLUS_CUSTOM = "fixed_plus_custom"
    FIXED_PLUS_DYNAMIC = "fixed_plus_dynamic"  # Fixed + LLM suggested
    CUSTOM_ONLY = "custom_only"
    DYNAMIC_AUTO = "dynamic_auto"


class CategoryDefinition(BaseModel):
    """類別定義"""
    name: str
    description: Optional[str] = None
    is_fixed: bool = True  # LLM 生成的為 False
    order: int = 0


class Step0Result(BaseModel):
    """Step 0: LLM 分析建議類別"""
    categories: List[CategoryDefinition]


class DynamicStep1Result(BaseModel):
    """動態版本的 Step 1 結果"""
    attributes: Dict[str, List[str]]  # {類別名: [屬性列表]}


class DynamicCausalChain(BaseModel):
    """動態版本的因果鏈"""
    chain: Dict[str, str]  # {類別名: 選中屬性}


# ===== DAG (Directed Acyclic Graph) schemas =====

class DAGNode(BaseModel):
    """DAG 節點 - 每個屬性只出現一次"""
    id: str                    # 唯一 ID: "{category}_{index}"
    name: str                  # 顯示名稱
    category: str              # 所屬類別
    order: int                 # 欄位內位置


class DAGEdge(BaseModel):
    """DAG 邊 - 節點之間的連接"""
    source_id: str
    target_id: str


class AttributeDAG(BaseModel):
    """完整 DAG 結構"""
    query: str
    categories: List[CategoryDefinition]
    nodes: List[DAGNode]
    edges: List[DAGEdge]


class DAGRelationship(BaseModel):
    """Step 2 輸出 - 單一關係"""
    source_category: str
    source: str  # source attribute name
    target_category: str
    target: str  # target attribute name


# ===== Transformation Agent schemas =====

class TransformationRequest(BaseModel):
    """Transformation Agent 請求"""
    query: str                        # 原始查詢 (e.g., "腳踏車")
    category: str                     # 類別名稱 (e.g., "功能")
    attributes: List[str]             # 該類別的屬性列表
    model: Optional[str] = None
    temperature: Optional[float] = 0.7
    keyword_count: int = 3            # 要生成的新關鍵字數量


class TransformationDescription(BaseModel):
    """單一轉換描述"""
    keyword: str                      # 新關鍵字
    description: str                  # 與 query 結合的描述


class TransformationCategoryResult(BaseModel):
    """單一類別的轉換結果"""
    category: str
    original_attributes: List[str]    # 原始屬性
    new_keywords: List[str]           # 新生成的關鍵字
    descriptions: List[TransformationDescription]


class TransformationDAGResult(BaseModel):
    """完整 Transformation 結果"""
    query: str
    results: List[TransformationCategoryResult]


# ===== Expert Transformation Agent schemas =====

class ExpertProfile(BaseModel):
    """專家檔案"""
    id: str                           # e.g., "expert-0"
    name: str                         # e.g., "藥師"
    domain: str                       # e.g., "醫療與健康"
    perspective: Optional[str] = None # e.g., "從藥物與健康管理角度思考"


class ExpertKeyword(BaseModel):
    """專家視角生成的關鍵字"""
    keyword: str                      # 關鍵字本身
    expert_id: str                    # 哪個專家生成的
    expert_name: str                  # 專家名稱（冗餘，方便前端）
    source_attribute: str             # 來自哪個原始屬性


class ExpertTransformationDescription(BaseModel):
    """專家關鍵字的描述"""
    keyword: str
    expert_id: str
    expert_name: str
    description: str


class ExpertTransformationCategoryResult(BaseModel):
    """單一類別的轉換結果（專家版）"""
    category: str
    original_attributes: List[str]
    expert_keywords: List[ExpertKeyword]  # 所有專家生成的關鍵字
    descriptions: List[ExpertTransformationDescription]


class ExpertTransformationDAGResult(BaseModel):
    """完整轉換結果（專家版）"""
    query: str
    experts: List[ExpertProfile]      # 使用的專家列表
    results: List[ExpertTransformationCategoryResult]


class ExpertSource(str, Enum):
    """專家來源類型"""
    LLM = "llm"
    WIKIDATA = "wikidata"
    CONCEPTNET = "conceptnet"


class ExpertTransformationRequest(BaseModel):
    """Expert Transformation Agent 請求"""
    query: str
    category: str
    attributes: List[str]

    # Expert parameters
    expert_count: int = 3                        # 專家數量 (2-8)
    keywords_per_expert: int = 1                 # 每個專家為每個屬性生成幾個關鍵字 (1-3)
    custom_experts: Optional[List[str]] = None   # 用戶指定專家 ["藥師", "工程師"]

    # Expert source parameters
    expert_source: ExpertSource = ExpertSource.LLM  # 專家來源
    expert_language: str = "zh"                     # 外部來源的語言

    # LLM parameters
    model: Optional[str] = None
    temperature: Optional[float] = 0.7