from rest_framework import serializers
from rest_framework.authtoken.models import Token
from django.contrib.auth.password_validation import validate_password
from django.utils.translation import gettext_lazy as _
from apps.account.models import User
from utils import FileFieldSerializer, absolute_url
from utils.validators import validate_type_code



class UserProfileSerializer(serializers.ModelSerializer):
    avatar = FileFieldSerializer(required=False)
    password = serializers.CharField(write_only=True, required=False, validators=[validate_password])
    fullname = serializers.CharField(required=False)
    class Meta:
        model = User
        fields = ['id', 'fullname', 'avatar', 'email', 'phone_number', 'password', 'info']
        read_only_fields = ['email', 'info']  

    # def validate_email(self, value):
    #     if User.objects.filter(email=value).exists():
    #         raise serializers.ValidationError("This email is already registered.")
    #     return value

    def update(self, instance, validated_data):
        password = validated_data.pop('password', None)
        if password:
            instance.set_password(password)
        # Update other fields
        for attr, value in validated_data.items():
            if value is not None:
                setattr(instance, attr, value)

        instance.save()
        return instance


class UserRegisterSerializer(serializers.ModelSerializer):
    password_confirmation = serializers.CharField(write_only=True)
    fcm = serializers.CharField(required=False)
    device_id = serializers.CharField(required=False)
    email = serializers.EmailField()
      
    class Meta:
        model = User
        fields = ['id','fullname', 'email', 'password', 'password_confirmation', 'fcm', 'device_id']
        extra_kwargs = {
            'fullname': {'required': True,},
            'email': {'required': True,},
            'password': {'required': True,},
            'password_confirmation': {'required': True,},
        }

    def validate_email(self, value):
        if User.objects.filter(email=value).exists():
            raise serializers.ValidationError("This email is already registered.")
        return value

    
    def validate(self, data):
        password = data.get('password')
        password_confirmation = data.get('password_confirmation')
        if password and password_confirmation  and password != password_confirmation:
            raise serializers.ValidationError("Passwords do not match.")
        if len(password) < 8:
            raise serializers.ValidationError("Password must be at least 8 characters long.")

        data.pop('password_confirmation', None)
        data.pop('fcm', None)        
        data.pop('device_id', None)        
        return data


    
class UserVerifySerializer(serializers.ModelSerializer):
    code = serializers.CharField(max_length=5, validators=[validate_type_code])
    email = serializers.EmailField()

    class Meta:
        model = User
        fields = ["email", "code"]
        extra_kwargs = {
            'email': {'required': True,},
            'code': {'required': True,},
        }


class UserLoginSerializer(serializers.ModelSerializer):
    password = serializers.CharField(write_only=True)
    token = serializers.CharField(allow_null=True, read_only=True, required=False)
    fullname = serializers.CharField(allow_null=True, read_only=True, required=False)
    avatar = serializers.CharField(allow_null=True, read_only=True, required=False)
    email = serializers.EmailField(write_only=True)
    password = serializers.CharField(style={'input_type': 'password'}, trim_whitespace=False)
    fcm = serializers.CharField(required=False)
    device_id = serializers.CharField(required=False)

    
    class Meta:
        model = User
        fields = ['id', 'phone_number', 'password', 'fullname', 'avatar', 'email', 'token', 'fcm', 'device_id']
        
    def get_token(self, obj):
        token, created = Token.objects.get_or_create(user=obj)
        return token.key

    def validate(self, data):
        data.pop('fcm', None)        
        data.pop('device_id', None)        
        return data


        
        
class UserRecoverPasswordSerializer(serializers.ModelSerializer):
    email = serializers.EmailField()
    
    class Meta:
        model = User
        fields = ['email',]
        extra_kwargs = {
            'email': {'required': True,},
        }


class UserResetPasswordSerializer(serializers.ModelSerializer):
    password = serializers.CharField(write_only=True)
    password_confirmation = serializers.CharField(write_only=True)

    class Meta:
        model = User
        fields = ['password', 'password_confirmation']
        extra_kwargs = {
            'password': {'required': True,},
            'password_confirmation': {'required': True,},
        }
                

    def validate(self, data):
        password = data.get('password')
        password_confirmation = data.get('password_confirmation')
        if password and password_confirmation  and password != password_confirmation:
            raise serializers.ValidationError("Passwords do not match.")
        if len(password) < 8:
            raise serializers.ValidationError("Password must be at least 8 characters long.")

        data.pop('password_confirmation', None)
        
        return data