/**
 * Storage Configuration Auto-Detection
 * Intelligently selects storage based on environment and available services
 */
import { isBrowser, isNode } from '../utils/environment.js';
/**
 * Low-level storage implementation types
 */
export var StorageType;
(function (StorageType) {
    StorageType["MEMORY"] = "memory";
    StorageType["FILESYSTEM"] = "filesystem";
    StorageType["OPFS"] = "opfs";
    StorageType["S3"] = "s3";
    StorageType["GCS"] = "gcs";
    StorageType["R2"] = "r2";
})(StorageType || (StorageType = {}));
/**
 * High-level storage presets (maps to StorageType)
 */
export var StoragePreset;
(function (StoragePreset) {
    StoragePreset["AUTO"] = "auto";
    StoragePreset["MEMORY"] = "memory";
    StoragePreset["DISK"] = "disk";
    StoragePreset["CLOUD"] = "cloud";
})(StoragePreset || (StoragePreset = {}));
/**
 * Auto-detect the best storage configuration
 * @param override - Manual override: specific type or preset
 */
export async function autoDetectStorage(override) {
    // Handle direct storage config object
    if (override && typeof override === 'object') {
        return {
            type: override.type || 'memory',
            config: override,
            reason: 'Manually configured storage',
            autoSelected: false
        };
    }
    // Handle storage type override (enum values or strings)
    if (override && Object.values(StorageType).includes(override)) {
        return {
            type: override,
            config: override,
            reason: `Manually specified: ${override}`,
            autoSelected: false
        };
    }
    // Handle presets (both enum and string values)
    if (override === StoragePreset.MEMORY || override === 'memory') {
        return {
            type: StorageType.MEMORY,
            config: StorageType.MEMORY,
            reason: 'Preset: memory storage',
            autoSelected: false
        };
    }
    if (override === StoragePreset.DISK || override === 'disk') {
        const diskType = isBrowser() ? StorageType.OPFS : StorageType.FILESYSTEM;
        return {
            type: diskType,
            config: diskType,
            reason: `Preset: disk storage (${diskType})`,
            autoSelected: false
        };
    }
    if (override === StoragePreset.CLOUD || override === 'cloud') {
        const cloudStorage = await detectCloudStorage();
        if (cloudStorage) {
            return {
                ...cloudStorage,
                reason: `Preset: cloud storage (${cloudStorage.type})`,
                autoSelected: false
            };
        }
        // Fallback to disk if no cloud storage detected
        const diskType = isBrowser() ? StorageType.OPFS : StorageType.FILESYSTEM;
        return {
            type: diskType,
            config: diskType,
            reason: 'Preset: cloud (none detected, using disk)',
            autoSelected: false
        };
    }
    // Auto-detection logic
    return await autoDetectBestStorage();
}
/**
 * Automatically detect the best storage option
 */
async function autoDetectBestStorage() {
    // Check for cloud storage first (highest priority in production)
    const cloudStorage = await detectCloudStorage();
    if (cloudStorage && process.env.NODE_ENV === 'production') {
        return {
            ...cloudStorage,
            reason: `Auto-detected ${cloudStorage.type} in production`,
            autoSelected: true
        };
    }
    // Browser environment
    if (isBrowser()) {
        // Check for OPFS support
        if (await hasOPFSSupport()) {
            return {
                type: StorageType.OPFS,
                config: { requestPersistentStorage: true },
                reason: 'Browser with OPFS support detected',
                autoSelected: true
            };
        }
        // Fallback to memory for browsers without OPFS
        return {
            type: StorageType.MEMORY,
            config: StorageType.MEMORY,
            reason: 'Browser without OPFS - using memory',
            autoSelected: true
        };
    }
    // Serverless environment - prefer memory or cloud
    if (isServerlessEnvironment()) {
        if (cloudStorage) {
            return {
                ...cloudStorage,
                reason: `Serverless with ${cloudStorage.type} detected`,
                autoSelected: true
            };
        }
        return {
            type: StorageType.MEMORY,
            config: StorageType.MEMORY,
            reason: 'Serverless environment - using memory',
            autoSelected: true
        };
    }
    // Node.js environment - use filesystem
    if (isNode()) {
        const dataPath = await findBestDataPath();
        return {
            type: StorageType.FILESYSTEM,
            config: StorageType.FILESYSTEM,
            reason: `Node.js environment - using filesystem at ${dataPath}`,
            autoSelected: true
        };
    }
    // Fallback to memory
    return {
        type: StorageType.MEMORY,
        config: StorageType.MEMORY,
        reason: 'Default fallback - using memory',
        autoSelected: true
    };
}
/**
 * Detect cloud storage from environment variables
 */
async function detectCloudStorage() {
    // AWS S3 Detection
    if (hasAWSConfig()) {
        return {
            type: StorageType.S3,
            config: {
                s3Storage: {
                    bucketName: process.env.AWS_BUCKET || process.env.S3_BUCKET_NAME || 'brainy-data',
                    region: process.env.AWS_REGION || process.env.AWS_DEFAULT_REGION || 'us-east-1',
                    // Credentials will be picked up by AWS SDK automatically
                }
            }
        };
    }
    // Google Cloud Storage Detection
    if (hasGCPConfig()) {
        return {
            type: StorageType.GCS,
            config: {
                gcsStorage: {
                    bucketName: process.env.GCS_BUCKET || process.env.GOOGLE_STORAGE_BUCKET || 'brainy-data',
                    // Credentials will be picked up by GCP SDK automatically
                }
            }
        };
    }
    // Cloudflare R2 Detection
    if (hasR2Config()) {
        return {
            type: StorageType.R2,
            config: {
                r2Storage: {
                    bucketName: process.env.R2_BUCKET || 'brainy-data',
                    accountId: process.env.CLOUDFLARE_ACCOUNT_ID,
                    accessKeyId: process.env.R2_ACCESS_KEY_ID,
                    secretAccessKey: process.env.R2_SECRET_ACCESS_KEY
                }
            }
        };
    }
    return null;
}
/**
 * Check if AWS S3 is configured
 */
function hasAWSConfig() {
    return !!(
    // Explicit S3 bucket
    process.env.AWS_BUCKET ||
        process.env.S3_BUCKET_NAME ||
        // AWS credentials (SDK will find them)
        process.env.AWS_ACCESS_KEY_ID ||
        process.env.AWS_PROFILE ||
        // AWS environment indicators
        process.env.AWS_EXECUTION_ENV ||
        process.env.AWS_LAMBDA_FUNCTION_NAME ||
        process.env.ECS_CONTAINER_METADATA_URI);
}
/**
 * Check if Google Cloud Storage is configured
 */
function hasGCPConfig() {
    return !!(
    // Explicit GCS bucket
    process.env.GCS_BUCKET ||
        process.env.GOOGLE_STORAGE_BUCKET ||
        // GCP credentials
        process.env.GOOGLE_APPLICATION_CREDENTIALS ||
        // GCP environment indicators
        process.env.GOOGLE_CLOUD_PROJECT ||
        process.env.K_SERVICE ||
        process.env.GAE_SERVICE);
}
/**
 * Check if Cloudflare R2 is configured
 */
function hasR2Config() {
    return !!(process.env.R2_BUCKET ||
        (process.env.CLOUDFLARE_ACCOUNT_ID && process.env.R2_ACCESS_KEY_ID));
}
/**
 * Check if running in serverless environment
 */
function isServerlessEnvironment() {
    if (!isNode())
        return false;
    return !!(process.env.AWS_LAMBDA_FUNCTION_NAME ||
        process.env.VERCEL ||
        process.env.NETLIFY ||
        process.env.CLOUDFLARE_WORKERS ||
        process.env.FUNCTIONS_WORKER_RUNTIME ||
        process.env.K_SERVICE ||
        process.env.RAILWAY_ENVIRONMENT ||
        process.env.FLY_APP_NAME);
}
/**
 * Check for OPFS support in browser
 */
async function hasOPFSSupport() {
    if (!isBrowser())
        return false;
    try {
        return 'storage' in navigator &&
            'getDirectory' in navigator.storage;
    }
    catch {
        return false;
    }
}
/**
 * Find the best path for filesystem storage
 */
async function findBestDataPath() {
    if (!isNode())
        return './brainy-data';
    const homeDir = process.env.HOME || process.env.USERPROFILE || '~';
    const tempDir = process.env.TMPDIR || process.env.TEMP || '/tmp';
    const candidates = [
        // User-specified path
        process.env.BRAINY_DATA_PATH,
        // Current directory
        './brainy-data',
        // Home directory
        `${homeDir}/.brainy/data`,
        // Temp directory (last resort)
        `${tempDir}/brainy-data`
    ].filter(Boolean);
    // Find first writable directory
    for (const candidate of candidates) {
        if (await isWritable(candidate)) {
            return candidate;
        }
    }
    // Default fallback
    return candidates[1]; // ./brainy-data
}
/**
 * Check if a directory is writable
 */
async function isWritable(dirPath) {
    if (!isNode())
        return false;
    try {
        // Dynamic import fs for Node.js
        const { promises: fs } = await import('fs');
        const path = await import('path');
        // Try to create directory if it doesn't exist
        await fs.mkdir(dirPath, { recursive: true });
        // Try to write a test file
        const testFile = path.join(dirPath, '.write-test');
        await fs.writeFile(testFile, 'test');
        await fs.unlink(testFile);
        return true;
    }
    catch {
        return false;
    }
}
// Legacy getStorageConfig function removed - now using simple string types
/**
 * Log storage configuration decision
 */
export function logStorageConfig(config, verbose = false) {
    if (!verbose && process.env.NODE_ENV === 'production') {
        return; // Silent in production unless verbose
    }
    const icon = config.autoSelected ? '🤖' : '👤';
    console.log(`${icon} Storage: ${config.type.toUpperCase()} - ${config.reason}`);
}
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