from pydantic import BaseModel, Field

from app.schemas.evaluation import EvaluationResponse


class TeachingVideo(BaseModel):
    """教学视频：题目解析关联的视频资源。"""

    title: str = ""
    url: str = ""


class TeachingOption(BaseModel):
    """教学选项：单选题或多选题的选项结构。"""

    key: str
    text: str


class TeachingQuestion(BaseModel):
    """教学题目：从 teaching_case 解析出的互动题目。"""

    question_id: str
    question_type: str = "single_choice"
    stem: str
    options: list[TeachingOption] = Field(default_factory=list)
    answer: str | list[str]
    analysis: str = ""
    video: TeachingVideo | None = None
    knowledge_points: list[str] = Field(default_factory=list)


class TeachingCaseSummary(BaseModel):
    """教学病例摘要：教学互动页面展示的病例基础信息。"""

    case_id: int
    title: str
    department_id: int | None = None
    difficulty: str
    chief_complaint: str
    description: str
    patient_age: int | None = None
    patient_gender: str | None = None
    knowledge_points: list[str] = Field(default_factory=list)


class TeachingItemsResponse(BaseModel):
    """教学列表响应：病例、教学目标、题目、答案、解析文本和视频。"""

    case: TeachingCaseSummary
    teaching_goal: str
    teacher_guide: str
    scoring_focus: str
    questions: list[TeachingQuestion]


class TeachingAnswer(BaseModel):
    """教学作答：前端提交的单题选择结果。"""

    question_id: str = Field(min_length=1, max_length=64)
    selected_answer: str | list[str]


class CreateTeachingEvaluationRequest(BaseModel):
    """教学评价入参：提交教学互动题目作答并生成评价。"""

    case_id: int
    answers: list[TeachingAnswer] = Field(min_length=1)
    score_type: str = Field(default="percentage", pattern="^(percentage|five_point)$")


class TeachingEvaluationResponse(EvaluationResponse):
    """教学评价响应：复用训练评价结构，并返回教学会话 ID。"""

    session_id: int