from marshmallow import Schema, fields, validate, EXCLUDE


class LoginSchema(Schema):
    """Validation schema for user login"""
    class Meta:
        unknown = EXCLUDE

    username = fields.Str(
        required=True,
        validate=validate.Length(min=3, max=100),
        error_messages={"required": "Username is required"}
    )
    password = fields.Str(
        required=True,
        validate=validate.Length(min=6, max=200),
        error_messages={"required": "Password is required"}
    )


class RegisterSchema(Schema):
    """Validation schema for user registration"""
    class Meta:
        unknown = EXCLUDE

    username = fields.Str(
        required=True,
        validate=validate.Length(min=3, max=100),
        error_messages={"required": "Username is required"}
    )
    password = fields.Str(
        required=True,
        validate=validate.Length(min=6, max=200),
        error_messages={"required": "Password is required"}
    )
    email = fields.Email(
        required=True,
        error_messages={"required": "Email is required"}
    )


class ChangePasswordSchema(Schema):
    """Validation schema for password change"""
    class Meta:
        unknown = EXCLUDE

    new_password = fields.Str(
        required=True,
        validate=validate.Length(min=6, max=200),
        error_messages={"required": "New password is required"}
    )
    password_confirm = fields.Str(
        required=True,
        validate=validate.Length(min=6, max=200),
        error_messages={"required": "Password confirmation is required"}
    )