"""
Pydantic models for the static JSON data files.
"""
from pydantic import BaseModel, field_validator


class TongueTwister(BaseModel):
    text: str
    focus: str


class TTLevels(BaseModel):
    easy: list[TongueTwister]
    medium: list[TongueTwister]
    hard: list[TongueTwister]


class ImpCategory(BaseModel):
    category: str
    questions: list[str]

    @field_validator("questions")
    @classmethod
    def questions_not_empty(cls, v: list[str]) -> list[str]:
        if not v:
            raise ValueError("questions list must not be empty")
        return v


class IvCategory(BaseModel):
    category: str
    questions: list[str]

    @field_validator("questions")
    @classmethod
    def questions_not_empty(cls, v: list[str]) -> list[str]:
        if not v:
            raise ValueError("questions list must not be empty")
        return v


class AppData(BaseModel):
    """Container holding all loaded JSON data (validated at startup)."""
    jam: list[str]
    tt: TTLevels
    impromptu: list[ImpCategory]
    interview: list[IvCategory]