/**
 * Model Configuration Auto-Selection
 * Intelligently selects model precision based on environment
 * while allowing manual override
 */
import { isBrowser, isNode } from '../utils/environment.js';
import { setModelPrecision } from './modelPrecisionManager.js';
/**
 * Auto-select model precision based on environment and resources
 * DEFAULT: Q8 for optimal size/performance balance
 * @param override - Manual override: 'fp32', 'q8', 'fast' (fp32), 'small' (q8), or 'auto'
 */
export function autoSelectModelPrecision(override) {
    // Handle direct precision override
    if (override === 'fp32' || override === 'q8') {
        setModelPrecision(override); // Update central config
        return {
            precision: override,
            reason: `Manually specified: ${override}`,
            autoSelected: false
        };
    }
    // Handle preset overrides
    if (override === 'fast') {
        setModelPrecision('fp32'); // Update central config
        return {
            precision: 'fp32',
            reason: 'Preset: fast (fp32 for best quality)',
            autoSelected: false
        };
    }
    if (override === 'small') {
        setModelPrecision('q8'); // Update central config
        return {
            precision: 'q8',
            reason: 'Preset: small (q8 for reduced size)',
            autoSelected: false
        };
    }
    // Auto-selection logic
    return autoDetectBestPrecision();
}
/**
 * Automatically detect the best model precision for the environment
 * NEW DEFAULT: Q8 for optimal size/performance (75% smaller, 99% accuracy)
 */
function autoDetectBestPrecision() {
    // Check if user explicitly wants FP32 via environment variable
    if (process.env.BRAINY_FORCE_FP32 === 'true') {
        setModelPrecision('fp32');
        return {
            precision: 'fp32',
            reason: 'FP32 forced via BRAINY_FORCE_FP32 environment variable',
            autoSelected: false
        };
    }
    // Browser environment - use Q8 for smaller download/memory
    if (isBrowser()) {
        setModelPrecision('q8');
        return {
            precision: 'q8',
            reason: 'Browser environment - using Q8 (23MB vs 90MB)',
            autoSelected: true
        };
    }
    // Serverless environments - use Q8 for faster cold starts
    if (isServerlessEnvironment()) {
        setModelPrecision('q8');
        return {
            precision: 'q8',
            reason: 'Serverless environment - using Q8 for 75% faster cold starts',
            autoSelected: true
        };
    }
    // Check available memory
    const memoryMB = getAvailableMemoryMB();
    // Only use FP32 if explicitly high memory AND user opts in
    if (memoryMB >= 4096 && process.env.BRAINY_PREFER_QUALITY === 'true') {
        setModelPrecision('fp32');
        return {
            precision: 'fp32',
            reason: `High memory (${memoryMB}MB) + quality preference - using FP32`,
            autoSelected: true
        };
    }
    // DEFAULT TO Q8 - Optimal for 99% of use cases
    // Q8 provides 99% accuracy at 25% of the size
    setModelPrecision('q8');
    return {
        precision: 'q8',
        reason: 'Default: Q8 model (23MB, 99% accuracy, 4x faster loads)',
        autoSelected: true
    };
}
/**
 * Check if running in a 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 // Google Cloud Run
    );
}
/**
 * Get available memory in MB
 */
function getAvailableMemoryMB() {
    if (isBrowser()) {
        // @ts-ignore - navigator.deviceMemory is experimental
        if (navigator.deviceMemory) {
            // @ts-ignore
            return navigator.deviceMemory * 1024; // Device memory in GB
        }
        return 256; // Conservative default for browsers
    }
    if (isNode()) {
        try {
            // Try to get memory info synchronously for Node.js
            // This will be available in Node.js environments
            if (typeof process !== 'undefined' && process.memoryUsage) {
                // Use RSS (Resident Set Size) as a proxy for available memory
                const rss = process.memoryUsage().rss;
                // Assume we can use up to 4GB or 50% more than current usage
                return Math.min(4096, Math.floor(rss / (1024 * 1024) * 1.5));
            }
        }
        catch {
            // Fall through to default
        }
        return 1024; // Default 1GB for Node.js
    }
    return 512; // Conservative default
}
/**
 * Convenience function to check if models need to be downloaded
 * This replaces the need for BRAINY_ALLOW_REMOTE_MODELS
 */
export function shouldAutoDownloadModels() {
    // Always allow downloads unless explicitly disabled
    // This eliminates the need for BRAINY_ALLOW_REMOTE_MODELS
    const explicitlyDisabled = process.env.BRAINY_ALLOW_REMOTE_MODELS === 'false';
    if (explicitlyDisabled) {
        console.warn('Model downloads disabled via BRAINY_ALLOW_REMOTE_MODELS=false');
        return false;
    }
    // In production, always allow downloads for seamless operation
    if (process.env.NODE_ENV === 'production') {
        return true;
    }
    // In development, allow downloads with a one-time notice
    if (process.env.NODE_ENV === 'development') {
        return true;
    }
    // Default: allow downloads
    return true;
}
/**
 * Get the model path with intelligent defaults
 * This replaces the need for BRAINY_MODELS_PATH env var
 */
export function getModelPath() {
    // Check if user explicitly set a path (keeping this for advanced users)
    if (process.env.BRAINY_MODELS_PATH) {
        return process.env.BRAINY_MODELS_PATH;
    }
    // Browser - use cache API or IndexedDB (handled by transformers.js)
    if (isBrowser()) {
        return 'browser-cache';
    }
    // Serverless - use /tmp for ephemeral storage
    if (isServerlessEnvironment()) {
        return '/tmp/.brainy/models';
    }
    // Node.js - use home directory for persistent storage
    if (isNode()) {
        // Use process.env.HOME as a fallback
        const homeDir = process.env.HOME || process.env.USERPROFILE || '~';
        return `${homeDir}/.brainy/models`;
    }
    // Fallback
    return './.brainy/models';
}
/**
 * Log model configuration decision (only in verbose mode)
 */
export function logModelConfig(config, verbose = false) {
    if (!verbose && process.env.NODE_ENV === 'production') {
        return; // Silent in production unless verbose
    }
    const icon = config.autoSelected ? '🤖' : '👤';
    console.log(`${icon} Model: ${config.precision.toUpperCase()} - ${config.reason}`);
}
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