/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/* eslint-disable no-console */
import * as fs from 'node:fs';
import * as util from 'node:util';
/**
 * A simple, centralized logger for developer-facing debug messages.
 *
 * WHY USE THIS?
 * - It makes the INTENT of the log clear (it's for developers, not users).
 * - It provides a single point of control for debug logging behavior.
 * - We can lint against direct `console.*` usage to enforce this pattern.
 *
 * HOW IT WORKS:
 * This is a thin wrapper around the native `console` object. The `ConsolePatcher`
 * will intercept these calls and route them to the debug drawer UI.
 */
class DebugLogger {
    logStream;
    constructor() {
        this.logStream = process.env['GEMINI_DEBUG_LOG_FILE']
            ? fs.createWriteStream(process.env['GEMINI_DEBUG_LOG_FILE'], {
                flags: 'a',
            })
            : undefined;
        // Handle potential errors with the stream
        this.logStream?.on('error', (err) => {
            // Log to console as a fallback, but don't crash the app
            console.error('Error writing to debug log stream:', err);
        });
    }
    writeToFile(level, args) {
        if (this.logStream) {
            const message = util.format(...args);
            const timestamp = new Date().toISOString();
            const logEntry = `[${timestamp}] [${level}] ${message}\n`;
            this.logStream.write(logEntry);
        }
    }
    log(...args) {
        this.writeToFile('LOG', args);
        console.log(...args);
    }
    warn(...args) {
        this.writeToFile('WARN', args);
        console.warn(...args);
    }
    error(...args) {
        this.writeToFile('ERROR', args);
        console.error(...args);
    }
    debug(...args) {
        this.writeToFile('DEBUG', args);
        console.debug(...args);
    }
}
export const debugLogger = new DebugLogger();
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