"""News app common serializers."""
from rest_framework import serializers
from account.serializers.common import UserBaseSerializer
from location import models as location_models
from location.serializers import CountrySimpleSerializer
from news import models
from tag.serializers import TagBaseSerializer
from utils.serializers import TranslatedField, ProjectModelSerializer


class NewsTypeSerializer(serializers.ModelSerializer):
    """News type serializer."""

    class Meta:
        """Meta class."""

        model = models.NewsType
        fields = ('id', 'name')


class NewsBaseSerializer(ProjectModelSerializer):
    """Base serializer for News model."""

    # read only fields
    title_translated = TranslatedField(source='title')
    subtitle_translated = TranslatedField()

    # related fields
    news_type = NewsTypeSerializer(read_only=True)
    tags = TagBaseSerializer(read_only=True, many=True)

    class Meta:
        """Meta class."""

        model = models.News
        fields = (
            'id',
            'title_translated',
            'subtitle_translated',
            'is_highlighted',
            'image_url',
            'preview_image_url',
            'news_type',
            'tags',
            'slug',
        )


class NewsDetailSerializer(NewsBaseSerializer):
    """News detail serializer."""

    description_translated = TranslatedField()
    country = CountrySimpleSerializer(read_only=True)
    author = UserBaseSerializer(source='created_by', read_only=True)
    state_display = serializers.CharField(source='get_state_display',
                                          read_only=True)

    class Meta(NewsBaseSerializer.Meta):
        """Meta class."""

        fields = NewsBaseSerializer.Meta.fields + (
            'description_translated',
            'start',
            'end',
            'playlist',
            'is_publish',
            'state',
            'state_display',
            'author',
            'country',
        )


class NewsDetailWebSerializer(NewsDetailSerializer):
    """News detail serializer for web users.."""

    same_theme = NewsBaseSerializer(many=True, read_only=True)
    should_read = NewsBaseSerializer(many=True, read_only=True)

    class Meta(NewsDetailSerializer.Meta):
        """Meta class."""

        fields = NewsDetailSerializer.Meta.fields + (
            'same_theme',
            'should_read',
        )


class NewsBackOfficeBaseSerializer(NewsBaseSerializer):
    """News back office base serializer."""

    class Meta(NewsBaseSerializer.Meta):
        """Meta class."""

        fields = NewsBaseSerializer.Meta.fields + (
            'title',
            'subtitle',
        )


class NewsBackOfficeDetailSerializer(NewsBackOfficeBaseSerializer,
                                     NewsDetailSerializer):
    """News detail serializer for back-office users."""

    news_type_id = serializers.PrimaryKeyRelatedField(
        source='news_type', write_only=True,
        queryset=models.NewsType.objects.all())
    country_id = serializers.PrimaryKeyRelatedField(
        source='country', write_only=True,
        queryset=location_models.Country.objects.all())
    template_display = serializers.CharField(source='get_template_display',
                                             read_only=True)

    class Meta(NewsBackOfficeBaseSerializer.Meta, NewsDetailSerializer.Meta):
        """Meta class."""

        fields = NewsBackOfficeBaseSerializer.Meta.fields + \
                 NewsDetailSerializer.Meta.fields + (
                    'description',
                    'news_type_id',
                    'country_id',
                    'template',
                    'template_display',
                 )