from rest_framework import serializers


# ---- Request serializers ----

class GuestSessionRequestSerializer(serializers.Serializer):
    type = serializers.ChoiceField(choices=['guest'])
    deviceId = serializers.CharField(max_length=64)


class LoginRequestSerializer(serializers.Serializer):
    phone = serializers.CharField(max_length=15)
    otp = serializers.CharField(max_length=6)


class RefreshRequestSerializer(serializers.Serializer):
    refreshToken = serializers.CharField()


class SetGradeRequestSerializer(serializers.Serializer):
    gradeId = serializers.IntegerField()


class UpdateProfileRequestSerializer(serializers.Serializer):
    """
    ورودی PATCH /api/user/profile — همه‌ی فیلدها اختیاری‌اند و فقط همان‌هایی
    که فرستاده شوند تغییر می‌کنند (partial update واقعی).

    `phone` و `isGuest` عمداً اینجا نیستند: شماره فقط از مسیرِ OTP عوض
    می‌شود و مهمان‌بودن را کاربر نباید بتواند خودش تغییر دهد.
    """
    name = serializers.CharField(max_length=100, required=False, allow_blank=True)
    avatar = serializers.CharField(max_length=100, required=False, allow_blank=True)
    birthYear = serializers.IntegerField(required=False, allow_null=True,
                                         min_value=1300, max_value=1500)
    parentPhone = serializers.CharField(max_length=15, required=False, allow_blank=True)
    bio = serializers.CharField(max_length=200, required=False, allow_blank=True)

    def validate(self, attrs):
        if not attrs:
            raise serializers.ValidationError('حداقل یکی از فیلدها باید ارسال شود.')
        return attrs


class RequestOTPRequestSerializer(serializers.Serializer):
    """اپ کمکی برای گرفتن OTP (در سند اصلی نبود، برای تست‌پذیری Swagger اضافه شد)."""
    phone = serializers.CharField(max_length=15)


# ---- Response serializers ----

class GuestSessionResponseSerializer(serializers.Serializer):
    userId = serializers.CharField()
    token = serializers.CharField()
    isNewUser = serializers.BooleanField()
    isGuest = serializers.BooleanField()


class LoginResponseSerializer(serializers.Serializer):
    userId = serializers.CharField()
    token = serializers.CharField()
    refreshToken = serializers.CharField()


class RefreshResponseSerializer(serializers.Serializer):
    token = serializers.CharField()
    refreshToken = serializers.CharField()
    expiresIn = serializers.IntegerField()


class GradeSerializer(serializers.Serializer):
    id = serializers.IntegerField()
    title = serializers.CharField()
    icon = serializers.CharField()
    color = serializers.CharField()


class GradesListResponseSerializer(serializers.Serializer):
    grades = GradeSerializer(many=True)


class SetGradeResponseSerializer(serializers.Serializer):
    success = serializers.BooleanField()
    gradeId = serializers.IntegerField()


class RequestOTPResponseSerializer(serializers.Serializer):
    success = serializers.BooleanField()
    devOtp = serializers.CharField()
    note = serializers.CharField()


class ProfileResponseSerializer(serializers.Serializer):
    """پاسخ GET /api/user/profile — فقط داده‌ی لازم برای تب Profile اپ موبایل."""
    userId = serializers.CharField()
    phone = serializers.CharField(allow_null=True)
    name = serializers.CharField()
    avatar = serializers.CharField()
    isGuest = serializers.BooleanField()
    gradeId = serializers.IntegerField(allow_null=True)
    birthYear = serializers.IntegerField(allow_null=True)
    parentPhone = serializers.CharField()
    bio = serializers.CharField()