"""Pydantic 数据模型"""

from datetime import datetime
from typing import Any

from pydantic import BaseModel, Field


# ── 题目 ─────────────────────────────────────────────────

class ProblemBase(BaseModel):
    difficulty: float = Field(default=0.5, ge=0.0, le=1.0)
    question_type: str = ""
    import_type: str = "精选题"
    knowledge_codes: list[str] = Field(default_factory=list)
    comment: str = ""
    source: str = ""


class ProblemSummary(BaseModel):
    id: str
    difficulty: float
    question_type: str
    import_type: str
    chapters: list[str] = []
    knowledge_codes: list[str] = []
    comment: str = ""
    source: str = ""
    created_at: str = ""
    updated_at: str = ""


class ProblemDetail(ProblemSummary):
    render_html: str | None = None
    metadata_html: str | None = None  # 答案区 HTML


class ProblemUpdate(BaseModel):
    difficulty: float | None = None
    question_type: str | None = None
    import_type: str | None = None
    comment: str | None = None


class KnowledgeUpdate(BaseModel):
    knowledge_codes: list[str]


# ── 分页 ─────────────────────────────────────────────────

class PaginatedResponse(BaseModel):
    items: list[dict]
    total: int
    page: int
    page_size: int


# ── 统计 ─────────────────────────────────────────────────

class StatsResponse(BaseModel):
    total: int
    by_question_type: dict[str, int]
    by_import_type: dict[str, int]
    by_chapter: dict[str, int]


# ── 搜索 ────────────────────────────────────────────────

class SearchResult(BaseModel):
    id: str
    body_snippet: str = ""
    difficulty: float = 0.5
    question_type: str = ""
    import_type: str = ""
    chapters: list[str] = []


# ── 导入 ─────────────────────────────────────────────────

class ImportTaskStatus(BaseModel):
    id: str
    status: str
    total: int
    completed: int
    message: str
    result: Any = {}


# ── 试题篮 ───────────────────────────────────────────────

class CartCreate(BaseModel):
    name: str


class CartSummary(BaseModel):
    id: int
    name: str
    item_count: int
    created_at: str = ""


class CartDetail(CartSummary):
    items: list[ProblemSummary] = []


# ── 导出 ─────────────────────────────────────────────────

class ExportRequest(BaseModel):
    chapter: str | None = None
    import_type: str | None = None
    cart_id: int | None = None
    title: str | None = None


# ── 知识点 ───────────────────────────────────────────────

class KnowledgeNode(BaseModel):
    code: str
    path: str
    leaf_name: str
    chapter_code: str = ""
    chapter_name: str = ""


# ── 认证 ─────────────────────────────────────────────────

class TokenVerify(BaseModel):
    token: str


# ── WebDAV 配置 ──────────────────────────────────────────

class WebDAVConfig(BaseModel):
    url: str
    username: str
    password: str
    remote_path: str = "/tiku-backup"


# ── API 错误 ─────────────────────────────────────────────

class APIError(BaseModel):
    error: dict  # {"code": "xxx", "message": "..."}