"""News app common serializers."""
from rest_framework import serializers

from gallery.models import Image
from location import models as location_models
from location.serializers import CountrySimpleSerializer
from main.serializers import MetaDataContentSerializer
from news import models
from utils.methods import image_url_valid
from utils.serializers import TranslatedField


class NewsPromoImageSerializer(serializers.Serializer):

    horizontal_web_image = serializers.SerializerMethodField()
    horizontal_mobile_image = serializers.SerializerMethodField()

    def get_horizontal_web_image(self, obj):
        return obj['news_promo_horizontal_web'].url

    def get_horizontal_mobile_image(self, obj):
        return obj['news_promo_horizontal_mobile'].url


class NewsTileImageSerializer(serializers.Serializer):

    horizontal_web_image = serializers.SerializerMethodField()
    horizontal_mobile_image = serializers.SerializerMethodField()
    vertical_web_image = serializers.SerializerMethodField()

    def get_horizontal_web_image(self, obj):
        return obj['news_tile_horizontal_web'].url

    def get_horizontal_mobile_image(self, obj):
        return obj['news_tile_horizontal_mobile'].url

    def get_vertical_web_image(self, obj):
        return obj['news_tile_vertical_web'].url


class NewsHighlightImageSerializer(serializers.Serializer):

    vertical_web_image = serializers.SerializerMethodField()

    def get_vertical_web_image(self, obj):
        return obj['news_highlight_vertical'].url


class NewsEditorImageSerializer(serializers.Serializer):

    web_image = serializers.SerializerMethodField()
    mobile_image = serializers.SerializerMethodField()

    def get_web_image(self, obj):
        return obj['news_editor_web'].url

    def get_mobile_image(self, obj):
        return obj['news_editor_mobile'].url


class NewsGallerySerializer(serializers.ModelSerializer):

    promo_images = NewsPromoImageSerializer(source='image')
    tile_images = NewsTileImageSerializer(source='image')
    highlight_images = NewsHighlightImageSerializer(source='image')
    editor_images = NewsEditorImageSerializer(source='image')

    class Meta:
        """Meta class."""
        model = Image
        fields = [
            'promo_images',
            'tile_images',
            'highlight_images',
            'editor_images',
        ]


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

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

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


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

    gallery = serializers.SerializerMethodField()

    # read only fields
    title_translated = TranslatedField()
    subtitle_translated = TranslatedField()

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

    slug = serializers.SlugField(allow_blank=False, required=True, max_length=50)

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

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

    def get_gallery(self, obj):
        if image_url_valid(url=obj.image.image.url):
            return NewsGallerySerializer(obj.image).data


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

    description_translated = TranslatedField()
    country = CountrySimpleSerializer(read_only=True)

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

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


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())

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

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