from rest_framework import serializers
from django.db.utils import IntegrityError
from django.template.loader import render_to_string
from django.utils.http import urlsafe_base64_encode
from django.utils.encoding import force_bytes
from django.core.mail import EmailMessage
from django.contrib.sites.shortcuts import get_current_site

from api.tokens import account_activation_token
from shared.cryptography import encryption_util

from tournaments.models import Club, LiveMatch, TeamScore, Tournament, CustomUser, Event, Round, GroupStage, Match, TeamRegistration, PlayerRegistration, Purchase, FailedApiCall, DateInterval, Log, DeviceToken, UnregisteredTeam, UnregisteredPlayer, Image, DrawLog, Court
from tournaments.models.enums import UserOrigin, RegistrationPaymentMode
from biz.models import Activity, Prospect, Entity


class EncryptedUserField(serializers.Field):
    def to_representation(self, value):
        # Encrypt data when sending it out
        return encryption_util.encrypt_aes_gcm(str(value.id))

    def to_internal_value(self, data):
        # Decrypt data when receiving it
        decrypted_user_id = encryption_util.decrypt_aes_gcm(data)
        user = CustomUser.objects.get(id=decrypted_user_id)
        if decrypted_user_id is None:
            raise serializers.ValidationError("Invalid encrypted data")
        return user

class UserSerializer(serializers.ModelSerializer):

    password = serializers.CharField(write_only=True)

    def create(self, validated_data):

        # print(validated_data)
        umpire_code = None
        if 'umpire_code' in validated_data:
            umpire_code = validated_data['umpire_code']
        phone = None
        if 'phone' in validated_data:
            phone = validated_data['phone']
        licence_id = None
        if 'licence_id' in validated_data:
            licence_id = validated_data['licence_id']
        country = None
        if 'country' in validated_data:
            country = validated_data['country']

        username_lower = validated_data['username'].lower()
        if CustomUser.objects.filter(username__iexact=username_lower) | CustomUser.objects.filter(email__iexact=username_lower):
            raise serializers.ValidationError("Cet identifiant est déjà utilisé. Veuillez en choisir un autre :)")

        user = CustomUser.objects.create_user(
            username=validated_data['username'],
            last_update=validated_data.get('last_update'),
            email=validated_data['email'],
            password=validated_data['password'],
            first_name=validated_data['first_name'],
            last_name=validated_data['last_name'],
            is_active=False,
            umpire_code=umpire_code,
            phone=phone,
            licence_id=licence_id,
            country=country,
            summons_message_body=validated_data.get('summons_message_body'),
            summons_message_signature=validated_data.get('summons_message_signature'),
            summons_available_payment_methods=validated_data.get('summons_available_payment_methods'),
            summons_display_format=validated_data.get('summons_display_format'),
            summons_display_entry_fee=validated_data.get('summons_display_entry_fee'),
            summons_use_full_custom_message=validated_data.get('summons_use_full_custom_message'),
            match_formats_default_duration=validated_data.get('match_formats_default_duration'),
            bracket_match_format_preference=validated_data.get('bracket_match_format_preference'),
            group_stage_match_format_preference=validated_data.get('group_stage_match_format_preference'),
            loser_bracket_match_format_preference=validated_data.get('loser_bracket_match_format_preference'),
            loser_bracket_mode=validated_data.get('loser_bracket_mode'),
            origin=UserOrigin.APP,
            user_role=None,
            registration_payment_mode=validated_data.get('registration_payment_mode', RegistrationPaymentMode.DISABLED),
            umpire_custom_mail=validated_data.get('umpire_custom_mail'),
            umpire_custom_contact=validated_data.get('umpire_custom_contact'),
            umpire_custom_phone=validated_data.get('umpire_custom_phone'),
            hide_umpire_mail=validated_data.get('hide_umpire_mail', False),
            hide_umpire_phone=validated_data.get('hide_umpire_phone', True),
            disable_ranking_federal_ruling=validated_data.get('disable_ranking_federal_ruling', False)
        )

        self.send_email(self.context['request'], user)
        # RegistrationProfile.objects.filter(user=user).send_activation_email()

        return user

    def send_email(self, request, user):

        current_site = get_current_site(request)
        mail_subject = 'Activez votre compte Padel Club !'
        message = render_to_string('tournaments/acc_active_email.html', {
            'user': user,
            'domain': current_site.domain,
            'uid': urlsafe_base64_encode(force_bytes(user.pk)),
            'token': account_activation_token.make_token(user),
        })
        email = EmailMessage(mail_subject, message, to=[user.email])
        email.content_subtype = "html"
        email.send()

    class Meta:
        club_id = serializers.PrimaryKeyRelatedField(queryset=Club.objects.all())
        model = CustomUser
        fields = '__all__' # ['id', 'username', 'password', 'umpire_code', 'clubs', 'phone', 'first_name', 'last_name', 'licence_id']

class CustomUserSerializer(serializers.ModelSerializer): ### the one matching the CustomUser class and used for sync
    class Meta:
        model = CustomUser
        fields = CustomUser.fields_for_update()

class ShortUserSerializer(serializers.ModelSerializer):
    class Meta:
        model = CustomUser
        fields = ['id', 'first_name', 'last_name']

class ClubSerializer(serializers.ModelSerializer):
    class Meta:
        model = Club
        fields = '__all__'

    def create(self, validated_data):
        user = self.context['request'].user
        validated_data['creator'] = user
        return super().create(validated_data)

class TournamentSerializer(serializers.ModelSerializer):
    class Meta:
        model = Tournament
        fields = '__all__'

class TournamentSummarySerializer(serializers.ModelSerializer):
    # English field names for all the information described in the comment
    tournament_name = serializers.SerializerMethodField()
    tournament_information = serializers.CharField(source='information', read_only=True)
    start_date = serializers.SerializerMethodField()
    end_date = serializers.SerializerMethodField()
    tournament_category = serializers.SerializerMethodField()  # P25/P100/P250 as string
    tournament_type = serializers.SerializerMethodField()      # homme/femme/mixte as string
    tournament_age_category = serializers.SerializerMethodField()  # U10, U12, Senior, +45, etc. as string
    max_teams = serializers.IntegerField(source='team_count', read_only=True)
    registered_teams_count = serializers.SerializerMethodField()
    tournament_status = serializers.SerializerMethodField()    # status as string
    registration_link = serializers.SerializerMethodField()
    umpire_name = serializers.SerializerMethodField()
    umpire_phone = serializers.SerializerMethodField()
    umpire_email = serializers.SerializerMethodField()

    class Meta:
        model = Tournament
        fields = [
            'id',
            'tournament_name',
            'tournament_information',
            'start_date',
            'end_date',
            'tournament_category',
            'tournament_type',
            'tournament_age_category',
            'max_teams',
            'registered_teams_count',
            'tournament_status',
            'registration_link',
            'umpire_name',
            'umpire_phone',
            'umpire_email'
        ]

    def get_start_date(self, obj):
        """Get formatted start date"""
        return obj.local_start_date()

    def get_end_date(self, obj):
        """Get formatted end date"""
        return obj.local_end_date()

    def get_tournament_name(self, obj):
        """Get the tournament name"""
        return obj.name or obj.name_and_event()

    def get_tournament_category(self, obj):
        """Get tournament category as string label (P25, P100, P250, etc.)"""
        return obj.level()

    def get_tournament_type(self, obj):
        """Get tournament type as string label (homme, femme, mixte)"""
        return obj.category()

    def get_tournament_age_category(self, obj):
        """Get tournament age category as string label (U10, U12, Senior, +45, etc.)"""
        return obj.age()

    def get_registered_teams_count(self, obj):
        """Get number of registered teams"""
        return len(obj.teams(False))

    def get_tournament_status(self, obj):
        """Get tournament status as string"""
        return obj.get_tournament_status()

    def get_registration_link(self, obj):
        """Get appropriate link based on tournament status"""
        # This will need to be adapted based on your URL structure
        # For now, returning a placeholder that you can customize
        status = obj.get_online_registration_status()
        base_url = "https://padelclub.app/"
        if status.value in [1, 3, 5]:  # OPEN, NOT_STARTED, WAITING_LIST_POSSIBLE
            return f"{base_url}tournament/{obj.id}/info/"
        elif status.value == 7:  # IN_PROGRESS
            return f"{base_url}tournament/{obj.id}/live/"
        elif status.value == 8:  # ENDED_WITH_RESULTS
            return f"{base_url}tournament/{obj.id}/rankings/"
        else:
            return f"{base_url}tournament/{obj.id}/info/"

    def get_umpire_name(self, obj):
        """Get umpire/referee name"""
        return obj.umpire_contact()

    def get_umpire_phone(self, obj):
        """Get umpire phone number"""
        return obj.umpire_phone()

    def get_umpire_email(self, obj):
        """Get umpire email address"""
        return obj.umpire_mail()

class EventSerializer(serializers.ModelSerializer):
    class Meta:
        #club_id = serializers.PrimaryKeyRelatedField(queryset=Club.objects.all())
        model = Event
        fields = '__all__'

class RoundSerializer(serializers.ModelSerializer):
    class Meta:
        model = Round
        fields = '__all__'

class GroupStageSerializer(serializers.ModelSerializer):
    class Meta:
        model = GroupStage
        fields = '__all__'

class MatchSerializer(serializers.ModelSerializer):
    class Meta:
        model = Match
        fields = '__all__'

class TeamScoreSerializer(serializers.ModelSerializer):
    class Meta:
        model = TeamScore
        fields = '__all__'

class TeamRegistrationSerializer(serializers.ModelSerializer):
    class Meta:
        model = TeamRegistration
        fields = '__all__'

class PlayerRegistrationSerializer(serializers.ModelSerializer):
    class Meta:
        model = PlayerRegistration
        fields = '__all__'

class PurchaseSerializer(serializers.ModelSerializer):
    user = EncryptedUserField()

    class Meta:
        model = Purchase
        fields = '__all__'

    def create(self, validated_data):
        user = self.context['request'].user
        validated_data['user'] = user
        return super().create(validated_data)


class LiveMatchSerializer(serializers.ModelSerializer):
    class Meta:
        model = LiveMatch
        fields = '__all__' # ['title', 'date'] # Serialize all fields of the model

class CourtSerializer(serializers.ModelSerializer):
    class Meta:
        model = Court
        fields = '__all__'

class DateIntervalSerializer(serializers.ModelSerializer):
    class Meta:
        model = DateInterval
        fields = '__all__'

class FailedApiCallSerializer(serializers.ModelSerializer):
    class Meta:
        model = FailedApiCall
        fields = '__all__'

class LogSerializer(serializers.ModelSerializer):
    class Meta:
        model = Log
        fields = '__all__'

class DeviceTokenSerializer(serializers.ModelSerializer):
    class Meta:
        model = DeviceToken
        fields = '__all__'
        read_only_fields = ['user']

class DrawLogSerializer(serializers.ModelSerializer):
    class Meta:
        model = DrawLog
        fields = '__all__'

class UnregisteredTeamSerializer(serializers.ModelSerializer):
    class Meta:
        # match_id = serializers.PrimaryKeyRelatedField(queryset=Match.objects.all())
        # group_stage_id = serializers.PrimaryKeyRelatedField(queryset=GroupStage.objects.all())
        model = UnregisteredTeam
        fields = '__all__'
        # ['id', 'group_stage_id', 'registration_date', 'call_date', 'bracket_position',
        #     'group_stage_position', 'logo']

class UnregisteredPlayerSerializer(serializers.ModelSerializer):
    class Meta:
        # team_registration_id = serializers.PrimaryKeyRelatedField(queryset=TeamRegistration.objects.all())
        # team_state_id = serializers.PrimaryKeyRelatedField(queryset=TeamState.objects.all())
        model = UnregisteredPlayer
        fields = '__all__'
        # ['id', 'team_registration_id', 'first_name', 'last_name', 'licence_id', 'rank', 'has_paid']

class ImageSerializer(serializers.ModelSerializer):
    image_url = serializers.SerializerMethodField()

    def get_image_url(self, obj):
        if obj.image:
            return self.context['request'].build_absolute_uri(obj.image.url)
        return None

    class Meta:
        model = Image
        fields = ['id', 'title', 'description', 'image', 'image_url', 'uploaded_at',
                  'event', 'image_type']
        read_only_fields = ['id', 'uploaded_at', 'image_url']

### CRM

class ActivitySerializer(serializers.ModelSerializer):
    class Meta:
        model = Activity
        fields = '__all__'

class ProspectSerializer(serializers.ModelSerializer):
    class Meta:
        model = Prospect
        fields = '__all__'

class EntitySerializer(serializers.ModelSerializer):
    class Meta:
        model = Entity
        fields = '__all__'