from typing import Literal, Optional

from pydantic import BaseModel, Field

LanguagePreference = Literal["zh", "en"]


class RegisterRequest(BaseModel):
    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    password: str = Field(..., min_length=6, description="密码（至少6位）")
    nickname: str = Field(..., min_length=1, max_length=50, description="昵称")
    email: Optional[str] = Field(None, description="邮箱（可选）")
    agreed_to_terms: bool = Field(..., description="是否同意用户协议和隐私政策")
    language: Optional[LanguagePreference] = Field(
        None,
        description="device language at signup; only used when creating a new user",
    )


class LoginRequest(BaseModel):
    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    password: str = Field(..., min_length=1, description="密码")
    agreed_to_terms: bool = Field(..., description="是否同意用户协议和隐私政策")


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


class RefreshTokenRequest(BaseModel):
    refresh_token: str = Field(..., description="刷新令牌")


class UserResponse(BaseModel):
    id: str
    phone: str
    email: Optional[str] = None
    nickname: str
    avatar_url: Optional[str] = None
    subscription_type: str
    created_at: str
    language_preference: LanguagePreference = "zh"


class SendSmsRequest(BaseModel):
    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    purpose: str = Field(
        ..., description="用途：register/login/reset_password/change_phone"
    )


class SendSmsResponse(BaseModel):
    success: bool
    message: str
    expires_in: Optional[int] = None


class SmsLoginRequest(BaseModel):
    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    code: str = Field(..., min_length=6, max_length=6, description="验证码（6位）")
    agreed_to_terms: bool = Field(..., description="是否同意用户协议和隐私政策")
    nickname: Optional[str] = Field(
        None, max_length=50, description="昵称（注册时必填，登录时可选）"
    )
    language: Optional[LanguagePreference] = Field(
        None,
        description="device language at signup; only used when creating a new user",
    )


class MockSmsLoginRequest(BaseModel):
    """开发/评测专用：与 MOCK_SMS_LOGIN_ENABLED 联用，跳过短信校验。"""

    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    agreed_to_terms: bool = Field(..., description="是否同意用户协议和隐私政策")
    nickname: Optional[str] = Field(
        None, max_length=50, description="新用户昵称（可选）"
    )
    language: Optional[LanguagePreference] = Field(
        None,
        description="device language at signup; only used when creating a new user",
    )


class SmsRegisterRequest(BaseModel):
    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    code: str = Field(..., min_length=6, max_length=6, description="验证码（6位）")
    password: str = Field(..., min_length=6, description="密码（至少6位）")
    nickname: str = Field(..., min_length=1, max_length=50, description="昵称")
    email: Optional[str] = Field(None, description="邮箱（可选）")
    agreed_to_terms: bool = Field(..., description="是否同意用户协议和隐私政策")
    language: Optional[LanguagePreference] = Field(
        None,
        description="device language at signup; only used when creating a new user",
    )


class ResetPasswordRequest(BaseModel):
    phone: str = Field(..., min_length=11, max_length=11, description="手机号（11位）")
    code: str = Field(..., min_length=6, max_length=6, description="验证码（6位）")
    new_password: str = Field(..., min_length=6, description="新密码（至少6位）")


class ChangePasswordRequest(BaseModel):
    old_password: str = Field(..., min_length=1, description="旧密码")
    new_password: str = Field(..., min_length=6, description="新密码（至少6位）")


class ChangePhoneRequest(BaseModel):
    new_phone: str = Field(
        ..., min_length=11, max_length=11, description="新手机号（11位）"
    )
    code: str = Field(..., min_length=6, max_length=6, description="验证码（6位）")


class UpdateNicknameRequest(BaseModel):
    nickname: str = Field(
        ..., min_length=1, max_length=50, description="昵称（1-50个字符）"
    )


class AvatarUploadResponse(BaseModel):
    avatar_url: str


class SetAvatarPresetRequest(BaseModel):
    preset_id: str = Field(
        ...,
        min_length=2,
        max_length=2,
        pattern=r"^\d{2}$",
        description="预设编号，如 01–08",
    )


class AvatarPresetItem(BaseModel):
    id: str
    url: str