from typing import List

from pydantic import BaseModel, validator

from src.model.language import Language

SUPPORTED_GENDERS = {'male', 'female'}


class Sentence(BaseModel):
    source: str

    @validator('source', pre=True)
    def blank_string_in_source(cls, value, field):
        if value == "":
            raise ValueError('source cannot be empty')
        return value


class TTSConfig(BaseModel):
    language: Language
    gender: str

    @validator('gender', pre=True)
    def blank_string_in_gender(cls, value, field):
        if value == "":
            raise ValueError('gender cannot be empty')
        if value not in SUPPORTED_GENDERS:
            raise ValueError('Unsupported gender value')
        return value


class TTSRequest(BaseModel):
    input: List[Sentence]
    config: TTSConfig

    @validator('input', pre=True)
    def input_cannot_be_empty(cls, value, field):
        if len(value) < 1:
            raise ValueError('input cannot be empty')
        return value