from pydantic import BaseModel, Field


class DocumentInfo(BaseModel):
    document_id: str
    name: str
    chunks_count: int
    file_type: str
    created_at: str
    metadata: dict = Field(default_factory=dict)


class ChunkPreview(BaseModel):
    index: int
    section: str = ""
    page_number: int = 0
    text_preview: str = ""
    char_length: int = 0


class DocumentUploadResponse(BaseModel):
    document_id: str
    name: str
    chunks_count: int
    status: str = "indexed"
    created_at: str
    chunks_preview: list[ChunkPreview] = Field(default_factory=list)


class DocumentListResponse(BaseModel):
    documents: list[DocumentInfo]
    total: int


class ChunkDetail(BaseModel):
    index: int
    section: str = ""
    page_number: int = 0
    text: str = ""
    char_length: int = 0
    embedding: list[float] = Field(default_factory=list)
    embedding_dim: int = 0


class DocumentChunksResponse(BaseModel):
    document_id: str
    name: str
    file_type: str
    chunks_count: int
    chunks: list[ChunkDetail] = Field(default_factory=list)


class DocumentDeleteResponse(BaseModel):
    ok: bool = True
    deleted_chunks: int


class SourceInfo(BaseModel):
    document_id: str
    document_name: str
    chunk_text: str
    section: str = ""
    page: int = 0
    relevance_score: float = 0.0


class QueryResponse(BaseModel):
    answer: str
    sources: list[SourceInfo]
    model_used: str
    assembled_prompt: str = ""


class HealthResponse(BaseModel):
    status: str = "ok"
    chromadb: str
    embedding_model: str
    documents_count: int
    chunks_count: int


class MessageInfo(BaseModel):
    id: int
    role: str
    text: str
    created_at: str
    sources: list[SourceInfo] = Field(default_factory=list)
    assembled_prompt: str = ""
    intent_code: str = ""
    intent_name: str = ""


class ThreadInfo(BaseModel):
    id: int
    name: str
    created_at: str
    updated_at: str
    messages_count: int
    first_message_preview: str = ""


class ThreadListResponse(BaseModel):
    threads: list[ThreadInfo]
    total: int


class ThreadStateInfo(BaseModel):
    current_intent_code: str | None = None
    current_step: int = 0
    slots: dict = Field(default_factory=dict)


class BounceInfo(BaseModel):
    from_: str = Field(alias="from")
    to: str
    preface: str = ""

    model_config = {"populate_by_name": True}


class ThreadDetailResponse(BaseModel):
    id: int
    name: str
    created_at: str
    updated_at: str
    messages: list[MessageInfo] = Field(default_factory=list)
    thread_state: ThreadStateInfo | None = None


class ChatResponse(BaseModel):
    thread_id: int
    thread_name: str
    message_id: int
    intent_code: str = ""
    intent_name: str = ""
    router_intent_code: str = ""
    config_version: int = 0
    router_version: int | None = None
    answer: str
    sources: list[SourceInfo]
    model_used: str
    assembled_prompt: str = ""
    thread_state: ThreadStateInfo = Field(default_factory=ThreadStateInfo)
    bounces: list[BounceInfo] = Field(default_factory=list)


class ThreadDeleteResponse(BaseModel):
    ok: bool = True
    deleted_messages: int


class AgentConfigInfo(BaseModel):
    id: int
    intent_id: int | None = None
    intent_code: str = ""
    intent_name: str = ""
    version: int
    name: str | None = None
    system_prompt: str
    rules_text: str = ""
    is_active: bool
    created_at: str


class AgentConfigListResponse(BaseModel):
    configs: list[AgentConfigInfo]
    total: int


class AgentConfigDeleteResponse(BaseModel):
    ok: bool = True


class IntentInfo(BaseModel):
    id: int
    code: str
    name: str
    description: str = ""
    is_enabled: bool
    order_index: int
    active_config_id: int | None = None
    active_config_version: int | None = None


class IntentListResponse(BaseModel):
    intents: list[IntentInfo]
    total: int