from rest_framework import serializers
from utils import FileFieldSerializer


class OnlineClassTokenCreateSerializer(serializers.Serializer):
    redirect_path = serializers.CharField(required=False)

    def validate_redirect_path(self, value: str) -> str:
        value = value.strip()
        if value and value.startswith("http"):
            raise serializers.ValidationError("Redirect path must be relative to the frontend domain.")
        return value


class OnlineClassTokenVerifySerializer(serializers.Serializer):
    token = serializers.CharField(max_length=128)

    def validate_token(self, value: str) -> str:
        value = value.strip()
        if not value:
            raise serializers.ValidationError("Token is required.")
        return value


class LiveSessionRoomCreateSerializer(serializers.Serializer):
    room_id = serializers.CharField(required=False, max_length=255, allow_blank=True)
    subject = serializers.CharField(required=False, max_length=255, allow_blank=True)

    def validate_room_id(self, value: str) -> str:
        return value.strip()

    def validate_subject(self, value: str) -> str:
        return value.strip()


class LiveSessionTokenSerializer(serializers.Serializer):
    course_slug = serializers.CharField(max_length=255)

    def validate_course_slug(self, value: str) -> str:
        value = value.strip()
        if not value:
            raise serializers.ValidationError("course_slug is required.")
        return value


class LiveSessionRecordedFileSerializer(serializers.Serializer):
    recorded_file = serializers.FileField(required=True)

    def validate_recorded_file(self, value):
        if not value:
            raise serializers.ValidationError("recorded_file is required.")
        return value


class LiveSessionRecordingSerializer(serializers.Serializer):
    file = FileFieldSerializer(required=True)
    title = serializers.CharField(required=False, max_length=255, allow_blank=True)
    recording_type = serializers.ChoiceField(choices=['voice', 'video'], required=False, default='video')
    file_time = serializers.DurationField(required=False, allow_null=True)

    def validate_file(self, value):
        if not value:
            raise serializers.ValidationError("file is required.")
        return value

    def validate_title(self, value):
        return value.strip() if value else None