import { ApiPropertyOptional } from "@nestjs/swagger";
import { IsEnum, IsInt, IsOptional, Min } from "class-validator";

/**
 * Cleanup mode when sessions expire.
 */
export enum SessionCleanupMode {
    /**
     * Delete the entire session record (default behavior).
     */
    Full = "full",
    /**
     * Keep session metadata but remove personal data
     * (credentials, verification results, etc.).
     */
    Anonymize = "anonymize",
}

/**
 * Configuration for session storage and cleanup behavior per tenant.
 */
export class SessionStorageConfig {
    /**
     * Time-to-live for sessions in seconds.
     * After this period, sessions are eligible for cleanup.
     * If not set, uses the global SESSION_TTL environment variable (default: 86400 = 24h).
     */
    @ApiPropertyOptional({
        description:
            "Time-to-live for sessions in seconds. If not set, uses global SESSION_TTL.",
        example: 86400,
        minimum: 60,
    })
    @IsOptional()
    @IsInt()
    @Min(60)
    ttlSeconds?: number;

    /**
     * Cleanup mode when sessions expire.
     * - 'full': Delete the entire session record (default)
     * - 'anonymize': Keep session metadata but remove personal data
     */
    @ApiPropertyOptional({
        description:
            "Cleanup mode: 'full' deletes everything, 'anonymize' keeps metadata but removes PII.",
        enum: SessionCleanupMode,
        default: SessionCleanupMode.Full,
    })
    @IsOptional()
    @IsEnum(SessionCleanupMode)
    cleanupMode?: SessionCleanupMode;
}