"""
Plugin Distribution System Serializers
"""
from rest_framework import serializers
from .models import Plugin, PluginVersion, PluginInstallation, PluginDownload


class PluginVersionSerializer(serializers.ModelSerializer):
    """Serializer for plugin versions."""
    
    download_count = serializers.SerializerMethodField()
    
    class Meta:
        model = PluginVersion
        fields = [
            'id',
            'version',
            'version_code',
            'status',
            'file_size',
            'checksum',
            'changelog',
            'min_api_version',
            'min_platform_version',
            'min_php_version',
            'force_update',
            'released_at',
            'created_at',
            'download_count',
        ]
        read_only_fields = ['id', 'version_code', 'created_at', 'download_count']
    
    def get_download_count(self, obj):
        return obj.get_download_count()


class PluginSerializer(serializers.ModelSerializer):
    """Serializer for plugins."""
    
    latest_version = serializers.SerializerMethodField()
    download_count = serializers.SerializerMethodField()
    
    class Meta:
        model = Plugin
        fields = [
            'id',
            'name',
            'slug',
            'platform',
            'description',
            'homepage_url',
            'is_active',
            'latest_version',
            'download_count',
            'created_at',
            'updated_at',
        ]
        read_only_fields = ['id', 'created_at', 'updated_at']
    
    def get_latest_version(self, obj):
        latest = obj.get_latest_version()
        if latest:
            return {
                'version': latest.version,
                'version_code': latest.version_code,
                'released_at': latest.released_at,
                'changelog': latest.changelog,
            }
        return None
    
    def get_download_count(self, obj):
        return obj.get_download_count()


class PluginDetailSerializer(PluginSerializer):
    """Detailed serializer for plugins including versions."""
    
    versions = PluginVersionSerializer(many=True, read_only=True)
    
    class Meta(PluginSerializer.Meta):
        fields = PluginSerializer.Meta.fields + ['versions']


class PluginInfoSerializer(serializers.Serializer):
    """
    Serializer for WordPress plugin info endpoint.
    Returns data in WordPress-compatible format.
    """
    name = serializers.CharField()
    slug = serializers.CharField()
    version = serializers.CharField()
    author = serializers.CharField(default='IGNY8')
    homepage = serializers.URLField()
    description = serializers.CharField()
    changelog = serializers.CharField()
    download_url = serializers.URLField()
    file_size = serializers.IntegerField()
    requires_php = serializers.CharField()
    tested_wp = serializers.CharField(default='6.7')


class CheckUpdateSerializer(serializers.Serializer):
    """Serializer for update check response."""
    update_available = serializers.BooleanField()
    current_version = serializers.CharField()
    latest_version = serializers.CharField(allow_null=True)
    latest_version_code = serializers.IntegerField(allow_null=True)
    download_url = serializers.URLField(allow_null=True)
    changelog = serializers.CharField(allow_null=True)
    info_url = serializers.URLField(allow_null=True)
    force_update = serializers.BooleanField(default=False)
    checksum = serializers.CharField(allow_null=True)


class RegisterInstallationSerializer(serializers.Serializer):
    """Serializer for registering plugin installations."""
    site_id = serializers.IntegerField()
    version = serializers.CharField()
    
    def validate_site_id(self, value):
        from igny8_core.auth.models import Site
        try:
            Site.objects.get(id=value)
        except Site.DoesNotExist:
            raise serializers.ValidationError("Site not found")
        return value


class HealthCheckSerializer(serializers.Serializer):
    """Serializer for plugin health check."""
    site_id = serializers.IntegerField()
    version = serializers.CharField()
    status = serializers.ChoiceField(choices=['active', 'inactive', 'error'])
    error_message = serializers.CharField(required=False, allow_blank=True)


class PluginInstallationSerializer(serializers.ModelSerializer):
    """Serializer for plugin installations."""
    
    plugin_name = serializers.CharField(source='plugin.name', read_only=True)
    plugin_slug = serializers.CharField(source='plugin.slug', read_only=True)
    current_version_str = serializers.CharField(source='current_version.version', read_only=True)
    site_name = serializers.CharField(source='site.name', read_only=True)
    pending_update_version = serializers.SerializerMethodField()
    
    class Meta:
        model = PluginInstallation
        fields = [
            'id',
            'site',
            'site_name',
            'plugin',
            'plugin_name',
            'plugin_slug',
            'current_version',
            'current_version_str',
            'is_active',
            'last_health_check',
            'health_status',
            'pending_update',
            'pending_update_version',
            'update_notified_at',
            'created_at',
            'updated_at',
        ]
        read_only_fields = ['id', 'created_at', 'updated_at']
    
    def get_pending_update_version(self, obj):
        if obj.pending_update:
            return obj.pending_update.version
        return None


class PluginDownloadSerializer(serializers.ModelSerializer):
    """Serializer for plugin downloads."""
    
    plugin_name = serializers.CharField(source='plugin.name', read_only=True)
    version_str = serializers.CharField(source='version.version', read_only=True)
    
    class Meta:
        model = PluginDownload
        fields = [
            'id',
            'plugin',
            'plugin_name',
            'version',
            'version_str',
            'site',
            'account',
            'download_type',
            'created_at',
        ]
        read_only_fields = ['id', 'created_at']


# Admin Serializers

class AdminPluginVersionCreateSerializer(serializers.ModelSerializer):
    """Serializer for creating new plugin versions (admin)."""
    
    class Meta:
        model = PluginVersion
        fields = [
            'version',
            'status',
            'changelog',
            'min_api_version',
            'min_platform_version',
            'min_php_version',
            'force_update',
        ]
    
    def validate_version(self, value):
        """Ensure version follows semantic versioning."""
        import re
        if not re.match(r'^\d+\.\d+\.\d+$', value):
            raise serializers.ValidationError(
                "Version must follow semantic versioning (e.g., 1.0.0)"
            )
        return value


class AdminPluginVersionUploadSerializer(serializers.Serializer):
    """Serializer for uploading plugin ZIP file."""
    file = serializers.FileField()
    
    def validate_file(self, value):
        """Ensure uploaded file is a ZIP."""
        if not value.name.endswith('.zip'):
            raise serializers.ValidationError("File must be a ZIP archive")
        
        # Check file size (max 50MB)
        max_size = 50 * 1024 * 1024
        if value.size > max_size:
            raise serializers.ValidationError(
                f"File too large. Maximum size is {max_size / 1024 / 1024}MB"
            )
        return value