import { createHash } from 'crypto'
import type { AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS } from 'src/services/analytics/index.js'
import { logEvent } from 'src/services/analytics/index.js'

/**
 * Creates a truncated SHA256 hash (16 chars) for file paths
 * Used for privacy-preserving analytics on file operations
 */
function hashFilePath(
 filePath: string,
): AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS {
 return createHash('sha256')
 .update(filePath)
 .digest('hex')
 .slice(0, 16) as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS
}

/**
 * Creates a full SHA256 hash (64 chars) for file contents
 * Used for deduplication and change detection analytics
 */
function hashFileContent(
 content: string,
): AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS {
 return createHash('sha256')
 .update(content)
 .digest('hex') as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS
}

// Maximum content size to hash (100KB)
// Prevents memory exhaustion when hashing large files (e.g., base64-encoded images)
const MAX_CONTENT_HASH_SIZE = 100 * 1024

/**
 * Logs file operation analytics to Statsig
 */
export function logFileOperation(params: {
 operation: 'read' | 'write' | 'edit'
 tool: 'FileReadTool' | 'FileWriteTool' | 'FileEditTool'
 filePath: string
 content?: string
 type?: 'create' | 'update'
}): void {
 const metadata: Record<
 string,
 | AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS
 | number
 | boolean
 > = {
 operation:
 params.operation as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
 tool: params.tool as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS,
 filePathHash: hashFilePath(params.filePath),
 }

 // Only hash content if it's provided and below size limit
 // This prevents memory exhaustion from hashing large files (e.g., base64-encoded images)
 if (
 params.content !== undefined &&
 params.content.length <= MAX_CONTENT_HASH_SIZE
 ) {
 metadata.contentHash = hashFileContent(params.content)
 }

 if (params.type !== undefined) {
 metadata.type =
 params.type as AnalyticsMetadata_I_VERIFIED_THIS_IS_NOT_CODE_OR_FILEPATHS
 }

 logEvent('tengu_file_operation', metadata)
}