"""
web_admin user_management serializers file
"""
# django imports
from rest_framework import serializers
from django.contrib.auth import get_user_model

from base.constants import USER_TYPE
# local imports
from base.messages import ERROR_CODE, SUCCESS_CODE
from guardian.models import Guardian
from junior.models import Junior

USER = get_user_model()


class UserManagementListSerializer(serializers.ModelSerializer):
    """
    user management serializer
    """
    name = serializers.SerializerMethodField()
    country_code = serializers.SerializerMethodField()
    phone = serializers.SerializerMethodField()
    user_type = serializers.SerializerMethodField()
    is_active = serializers.SerializerMethodField()

    class Meta:
        """
        meta class
        """
        model = USER
        fields = ('id', 'name', 'email', 'country_code', 'phone', 'user_type', 'is_active')

    @staticmethod
    def get_name(obj):
        """
        :param obj: user object
        :return: full name
        """
        return f"{obj.first_name} {obj.last_name}" if obj.last_name else obj.first_name

    @staticmethod
    def get_country_code(obj):
        """
        :param obj: user object
        :return: user phone number
        """
        if profile := obj.guardian_profile.all().first():
            return profile.country_code if profile.country_code else None
        elif profile := obj.junior_profile.all().first():
            return profile.country_code if profile.country_code else None
        else:
            return None

    @staticmethod
    def get_phone(obj):
        """
        :param obj: user object
        :return: user phone number
        """
        if profile := obj.guardian_profile.all().first():
            return profile.phone if profile.phone else None
        elif profile := obj.junior_profile.all().first():
            return profile.phone if profile.phone else None
        else:
            return None

    @staticmethod
    def get_user_type(obj):
        """
        :param obj: user object
        :return: user type
        """
        if obj.guardian_profile.all().first():
            return dict(USER_TYPE).get('2')
        elif obj.junior_profile.all().first():
            return dict(USER_TYPE).get('1')
        else:
            return None

    @staticmethod
    def get_is_active(obj):
        """
        :param obj: user object
        :return: user type
        """
        if profile := obj.guardian_profile.all().first():
            return profile.is_active
        elif profile := obj.junior_profile.all().first():
            return profile.is_active
        else:
            return obj.is_active


class GuardianSerializer(serializers.ModelSerializer):
    """
    guardian serializer
    """
    name = serializers.SerializerMethodField()
    first_name = serializers.SerializerMethodField()
    last_name = serializers.SerializerMethodField()
    username = serializers.SerializerMethodField()
    email = serializers.EmailField(required=False)

    class Meta:
        """
        meta class
        """
        model = Guardian
        fields = ('id', 'name', 'first_name', 'last_name', 'username', 'dob', 'gender', 'country_code', 'phone',
                  'is_active', 'country_name', 'image', 'email', 'is_deleted')

    def validate(self, attrs):
        """
        to validate request data
        :return: validated attrs
        """
        email = attrs.get('email')
        phone = attrs.get('phone')
        if USER.objects.filter(email=email).exclude(id=self.context.get('user_id')).exists():
            raise serializers.ValidationError({'details': ERROR_CODE['2003']})
        if Guardian.objects.filter(phone=phone).exclude(user__id=self.context.get('user_id')).exists():
            raise serializers.ValidationError({'details': ERROR_CODE['2012']})
        return attrs

    def update(self, instance, validated_data):
        """
        to update user and its related profile
        :param instance: user's guardian object
        :param validated_data:
        :return: guardian object
        """
        instance.user.email = self.validated_data.get('email', instance.user.email)
        instance.user.username = self.validated_data.get('email', instance.user.username)
        instance.user.save()
        instance.country_code = validated_data.get('country_code', instance.country_code)
        instance.phone = validated_data.get('phone', instance.phone)
        instance.save()
        return instance

    @staticmethod
    def get_name(obj):
        """
        :param obj: guardian object
        :return: full name
        """
        return f"{obj.user.first_name} {obj.user.last_name}" if obj.user.last_name else obj.user.first_name

    @staticmethod
    def get_first_name(obj):
        """
        :param obj: guardian object
        :return: first name
        """
        return obj.user.first_name

    @staticmethod
    def get_last_name(obj):
        """
        :param obj: guardian object
        :return: last name
        """
        return obj.user.last_name

    @staticmethod
    def get_username(obj):
        """
        :param obj: guardian object
        :return: email
        """
        return obj.user.username


class JuniorSerializer(serializers.ModelSerializer):
    """
    junior serializer
    """
    name = serializers.SerializerMethodField()
    first_name = serializers.SerializerMethodField()
    last_name = serializers.SerializerMethodField()
    username = serializers.SerializerMethodField()
    email = serializers.EmailField(required=False)

    class Meta:
        """
        meta class
        """
        model = Junior
        fields = ('id', 'name', 'first_name', 'last_name', 'username', 'dob', 'gender', 'country_code', 'phone',
                  'is_active', 'country_name', 'image', 'email', 'is_deleted')

    def validate(self, attrs):
        """
        to validate request data
        :return: validated attrs
        """
        email = attrs.get('email')
        phone = attrs.get('phone')
        if email and USER.objects.filter(email=email).exclude(id=self.context.get('user_id')).exists():
            raise serializers.ValidationError({'details': ERROR_CODE['2003']})
        if phone and Junior.objects.filter(phone=phone).exclude(auth__id=self.context.get('user_id')).exists():
            raise serializers.ValidationError({'details': ERROR_CODE['2012']})
        return attrs

    def update(self, instance, validated_data):
        """
        :param instance: user's junior object
        :param validated_data: validated data
        :return: instance
        """
        instance.auth.email = self.validated_data.get('email', instance.auth.email)
        instance.auth.username = self.validated_data.get('email', instance.auth.username)
        instance.auth.save()
        instance.country_code = validated_data.get('country_code', instance.country_code)
        instance.phone = validated_data.get('phone', instance.phone)
        instance.save()
        return instance

    @staticmethod
    def get_name(obj):
        """
        :param obj: junior object
        :return: full name
        """
        return f"{obj.auth.first_name} {obj.auth.last_name}" if obj.auth.last_name else obj.auth.first_name

    @staticmethod
    def get_first_name(obj):
        """
        :param obj: junior object
        :return: first name
        """
        return obj.auth.first_name

    @staticmethod
    def get_last_name(obj):
        """
        :param obj: junior object
        :return: last name
        """
        return obj.auth.last_name

    @staticmethod
    def get_username(obj):
        """
        :param obj: junior object
        :return: email
        """
        return obj.auth.username


class UserManagementDetailSerializer(serializers.ModelSerializer):
    """
    user management details serializer
    """
    user_type = serializers.SerializerMethodField()
    guardian_profile = GuardianSerializer(many=True)
    junior_profile = JuniorSerializer(many=True)
    associated_users = serializers.SerializerMethodField()

    class Meta:
        """
        meta class
        """
        model = USER
        fields = ('id', 'user_type', 'email', 'guardian_profile', 'junior_profile', 'associated_users')

    @staticmethod
    def get_user_type(obj):
        """
        :param obj: user object
        :return: user type
        """
        if obj.guardian_profile.all().first():
            return dict(USER_TYPE).get('2')
        elif obj.junior_profile.all().first():
            return dict(USER_TYPE).get('1')
        else:
            return None

    @staticmethod
    def get_associated_users(obj):
        """
        :param obj: user object
        :return: associated user
        """
        if profile := obj.guardian_profile.all().first():
            if profile.guardian_code:
                junior = Junior.objects.filter(guardian_code__contains=[profile.guardian_code], is_verified=True)
                serializer = JuniorSerializer(junior, many=True)
                return serializer.data
        elif profile := obj.junior_profile.all().first():
            if profile.guardian_code:
                guardian = Guardian.objects.filter(guardian_code__in=profile.guardian_code, is_verified=True)
                serializer = GuardianSerializer(guardian, many=True)
                return serializer.data
        else:
            return None