"""
Serializers for Rides API following Django styleguide patterns.
"""

from rest_framework import serializers
from ..models import Ride


class RideModelOutputSerializer(serializers.Serializer):
    """Output serializer for ride model data."""

    id = serializers.IntegerField()
    name = serializers.CharField()
    description = serializers.CharField()
    category = serializers.CharField()
    manufacturer = serializers.SerializerMethodField()

    def get_manufacturer(self, obj):
        if obj.manufacturer:
            return {
                "id": obj.manufacturer.id,
                "name": obj.manufacturer.name,
                "slug": obj.manufacturer.slug,
            }
        return None


class RideParkOutputSerializer(serializers.Serializer):
    """Output serializer for ride's park data."""

    id = serializers.IntegerField()
    name = serializers.CharField()
    slug = serializers.CharField()


class RideListOutputSerializer(serializers.Serializer):
    """Output serializer for ride list view."""

    id = serializers.IntegerField()
    name = serializers.CharField()
    slug = serializers.CharField()
    category = serializers.CharField()
    status = serializers.CharField()
    description = serializers.CharField()

    # Park info
    park = RideParkOutputSerializer()

    # Statistics
    average_rating = serializers.DecimalField(
        max_digits=3, decimal_places=2, allow_null=True
    )
    capacity_per_hour = serializers.IntegerField(allow_null=True)

    # Dates
    opening_date = serializers.DateField(allow_null=True)
    closing_date = serializers.DateField(allow_null=True)

    # Metadata
    created_at = serializers.DateTimeField()
    updated_at = serializers.DateTimeField()


class RideDetailOutputSerializer(serializers.Serializer):
    """Output serializer for ride detail view."""

    id = serializers.IntegerField()
    name = serializers.CharField()
    slug = serializers.CharField()
    category = serializers.CharField()
    status = serializers.CharField()
    post_closing_status = serializers.CharField(allow_null=True)
    description = serializers.CharField()

    # Park info
    park = RideParkOutputSerializer()
    park_area = serializers.SerializerMethodField()

    # Dates
    opening_date = serializers.DateField(allow_null=True)
    closing_date = serializers.DateField(allow_null=True)
    status_since = serializers.DateField(allow_null=True)

    # Physical specs
    min_height_in = serializers.IntegerField(allow_null=True)
    max_height_in = serializers.IntegerField(allow_null=True)
    capacity_per_hour = serializers.IntegerField(allow_null=True)
    ride_duration_seconds = serializers.IntegerField(allow_null=True)

    # Statistics
    average_rating = serializers.DecimalField(
        max_digits=3, decimal_places=2, allow_null=True
    )

    # Companies
    manufacturer = serializers.SerializerMethodField()
    designer = serializers.SerializerMethodField()

    # Model
    ride_model = RideModelOutputSerializer(allow_null=True)

    # Metadata
    created_at = serializers.DateTimeField()
    updated_at = serializers.DateTimeField()

    def get_park_area(self, obj):
        if obj.park_area:
            return {
                "id": obj.park_area.id,
                "name": obj.park_area.name,
                "slug": obj.park_area.slug,
            }
        return None

    def get_manufacturer(self, obj):
        if obj.manufacturer:
            return {
                "id": obj.manufacturer.id,
                "name": obj.manufacturer.name,
                "slug": obj.manufacturer.slug,
            }
        return None

    def get_designer(self, obj):
        if obj.designer:
            return {
                "id": obj.designer.id,
                "name": obj.designer.name,
                "slug": obj.designer.slug,
            }
        return None


class RideCreateInputSerializer(serializers.Serializer):
    """Input serializer for creating rides."""

    name = serializers.CharField(max_length=255)
    description = serializers.CharField(allow_blank=True, default="")
    category = serializers.ChoiceField(choices=Ride.CATEGORY_CHOICES)
    status = serializers.ChoiceField(choices=Ride.STATUS_CHOICES, default="OPERATING")

    # Required park
    park_id = serializers.IntegerField()

    # Optional area
    park_area_id = serializers.IntegerField(required=False, allow_null=True)

    # Optional dates
    opening_date = serializers.DateField(required=False, allow_null=True)
    closing_date = serializers.DateField(required=False, allow_null=True)
    status_since = serializers.DateField(required=False, allow_null=True)

    # Optional specs
    min_height_in = serializers.IntegerField(
        required=False, allow_null=True, min_value=30, max_value=90
    )
    max_height_in = serializers.IntegerField(
        required=False, allow_null=True, min_value=30, max_value=90
    )
    capacity_per_hour = serializers.IntegerField(
        required=False, allow_null=True, min_value=1
    )
    ride_duration_seconds = serializers.IntegerField(
        required=False, allow_null=True, min_value=1
    )

    # Optional companies
    manufacturer_id = serializers.IntegerField(required=False, allow_null=True)
    designer_id = serializers.IntegerField(required=False, allow_null=True)

    # Optional model
    ride_model_id = serializers.IntegerField(required=False, allow_null=True)

    def validate(self, data):
        """Cross-field validation."""
        # Date validation
        opening_date = data.get("opening_date")
        closing_date = data.get("closing_date")

        if opening_date and closing_date and closing_date < opening_date:
            raise serializers.ValidationError(
                "Closing date cannot be before opening date"
            )

        # Height validation
        min_height = data.get("min_height_in")
        max_height = data.get("max_height_in")

        if min_height and max_height and min_height > max_height:
            raise serializers.ValidationError(
                "Minimum height cannot be greater than maximum height"
            )

        return data


class RideUpdateInputSerializer(serializers.Serializer):
    """Input serializer for updating rides."""

    name = serializers.CharField(max_length=255, required=False)
    description = serializers.CharField(allow_blank=True, required=False)
    category = serializers.ChoiceField(choices=Ride.CATEGORY_CHOICES, required=False)
    status = serializers.ChoiceField(choices=Ride.STATUS_CHOICES, required=False)
    post_closing_status = serializers.ChoiceField(
        choices=Ride.POST_CLOSING_STATUS_CHOICES,
        required=False,
        allow_null=True,
    )

    # Park and area
    park_id = serializers.IntegerField(required=False)
    park_area_id = serializers.IntegerField(required=False, allow_null=True)

    # Dates
    opening_date = serializers.DateField(required=False, allow_null=True)
    closing_date = serializers.DateField(required=False, allow_null=True)
    status_since = serializers.DateField(required=False, allow_null=True)

    # Specs
    min_height_in = serializers.IntegerField(
        required=False, allow_null=True, min_value=30, max_value=90
    )
    max_height_in = serializers.IntegerField(
        required=False, allow_null=True, min_value=30, max_value=90
    )
    capacity_per_hour = serializers.IntegerField(
        required=False, allow_null=True, min_value=1
    )
    ride_duration_seconds = serializers.IntegerField(
        required=False, allow_null=True, min_value=1
    )

    # Companies
    manufacturer_id = serializers.IntegerField(required=False, allow_null=True)
    designer_id = serializers.IntegerField(required=False, allow_null=True)

    # Model
    ride_model_id = serializers.IntegerField(required=False, allow_null=True)

    def validate(self, data):
        """Cross-field validation."""
        # Date validation
        opening_date = data.get("opening_date")
        closing_date = data.get("closing_date")

        if opening_date and closing_date and closing_date < opening_date:
            raise serializers.ValidationError(
                "Closing date cannot be before opening date"
            )

        # Height validation
        min_height = data.get("min_height_in")
        max_height = data.get("max_height_in")

        if min_height and max_height and min_height > max_height:
            raise serializers.ValidationError(
                "Minimum height cannot be greater than maximum height"
            )

        return data


class RideFilterInputSerializer(serializers.Serializer):
    """Input serializer for ride filtering and search."""

    # Search
    search = serializers.CharField(required=False, allow_blank=True)

    # Category filter
    category = serializers.MultipleChoiceField(
        choices=Ride.CATEGORY_CHOICES, required=False
    )

    # Status filter
    status = serializers.MultipleChoiceField(
        choices=Ride.STATUS_CHOICES, required=False
    )

    # Park filter
    park_id = serializers.IntegerField(required=False)
    park_slug = serializers.CharField(required=False, allow_blank=True)

    # Company filters
    manufacturer_id = serializers.IntegerField(required=False)
    designer_id = serializers.IntegerField(required=False)

    # Rating filter
    min_rating = serializers.DecimalField(
        max_digits=3,
        decimal_places=2,
        required=False,
        min_value=1,
        max_value=10,
    )

    # Height filters
    min_height_requirement = serializers.IntegerField(required=False)
    max_height_requirement = serializers.IntegerField(required=False)

    # Capacity filter
    min_capacity = serializers.IntegerField(required=False)

    # Ordering
    ordering = serializers.ChoiceField(
        choices=[
            "name",
            "-name",
            "opening_date",
            "-opening_date",
            "average_rating",
            "-average_rating",
            "capacity_per_hour",
            "-capacity_per_hour",
            "created_at",
            "-created_at",
        ],
        required=False,
        default="name",
    )


class RideStatsOutputSerializer(serializers.Serializer):
    """Output serializer for ride statistics."""

    total_rides = serializers.IntegerField()
    operating_rides = serializers.IntegerField()
    closed_rides = serializers.IntegerField()
    under_construction = serializers.IntegerField()

    # By category
    rides_by_category = serializers.DictField()

    # Averages
    average_rating = serializers.DecimalField(
        max_digits=3, decimal_places=2, allow_null=True
    )
    average_capacity = serializers.DecimalField(
        max_digits=8, decimal_places=2, allow_null=True
    )

    # Top manufacturers
    top_manufacturers = serializers.ListField(child=serializers.DictField())

    # Recently added
    recently_added_count = serializers.IntegerField()