from pydantic import BaseModel, Field


class SystemSettingsOut(BaseModel):
    system_name: str
    logo_url: str | None = None


class SystemSettingsUpdate(BaseModel):
    system_name: str = Field(min_length=1, max_length=128)


class LoginRequest(BaseModel):
    username: str
    password: str


class ChangePasswordRequest(BaseModel):
    old_password: str = Field(min_length=1, max_length=128)
    new_password: str = Field(min_length=6, max_length=128)


class TokenResponse(BaseModel):
    access_token: str
    token_type: str = "bearer"


class UserMe(BaseModel):
    id: int
    username: str
    display_name: str
    role: str

    class Config:
        from_attributes = True


class ScoreRow(BaseModel):
    examinee_id: str
    name: str | None
    id_card: str | None
    subject_name: str
    score: float
    attempt_id: str
    room_id: str | None = None
    paper_name: str | None = None
    start_time: str | None = None
    end_time: str | None = None


class ScoresResponse(BaseModel):
    total: int
    page: int
    page_size: int
    items: list[ScoreRow]


class QuestionDetail(BaseModel):
    external_item_id: str
    part_name: str | None
    item_type: int | None
    item_order: int | None
    title_html: str | None
    detail_json: str | None
    max_score: float | None
    reference_answer: str | None
    user_answer: str | None
    is_correct: bool
    score: float


class PartGroup(BaseModel):
    part_name: str
    questions: list[QuestionDetail]


class AttemptDetail(BaseModel):
    attempt_id: str
    examinee_name: str | None
    id_card: str | None
    score: float
    paper_total_score: float | None
    paper_name: str | None
    subject_name: str | None
    room_id: str | None
    seat_number: str | None
    start_time: str | None
    end_time: str | None
    parts: list[PartGroup]


class GraderOut(BaseModel):
    id: int
    username: str
    display_name: str
    is_active: bool
    created_at: str
    subjects: list[str] = []


class GraderCreate(BaseModel):
    username: str = Field(min_length=2, max_length=64)
    password: str = Field(min_length=6, max_length=128)
    display_name: str = Field(default="", max_length=128)
    subjects: list[str] = Field(min_length=1)


class GraderUpdate(BaseModel):
    username: str | None = Field(default=None, min_length=2, max_length=64)
    password: str | None = Field(default=None, min_length=6, max_length=128)
    display_name: str | None = Field(default=None, max_length=128)
    is_active: bool | None = None
    subjects: list[str] | None = None


class GradersResponse(BaseModel):
    items: list[GraderOut]


class ImportBatchOut(BaseModel):
    id: int
    subject_name: str
    exam_id: int | None
    exam_ids: list[int] = []
    zip_filename: str
    imported_at: str
    status: str
    attempt_count: int = 0
    paper_name: str | None = None

    class Config:
        from_attributes = True