/**
 * @license
 * Copyright 2026 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import os from 'node:os';
/**
 * Detects if the current OS is Windows 10.
 * Windows 11 also reports as version 10.0, but with build numbers >= 22000.
 */
export function isWindows10() {
    if (os.platform() !== 'win32') {
        return false;
    }
    const release = os.release();
    const parts = release.split('.');
    if (parts.length >= 3 && parts[0] === '10' && parts[1] === '0') {
        const build = parseInt(parts[2], 10);
        return build < 22000;
    }
    return false;
}
/**
 * Detects if the current terminal is a JetBrains-based IDE terminal.
 */
export function isJetBrainsTerminal() {
    const env = process.env;
    return !!(env['TERMINAL_EMULATOR']?.startsWith('JetBrains') || env['JETBRAINS_IDE']);
}
/**
 * Detects if the current terminal is running inside tmux.
 */
export function isTmux() {
    return !!process.env['TMUX'];
}
/**
 * Detects if the current terminal is running inside GNU screen.
 */
export function isGnuScreen() {
    return !!process.env['STY'];
}
/**
 * Detects if the terminal is low-color mode (TERM=screen* with no COLORTERM).
 */
export function isLowColorTmux() {
    const term = process.env['TERM'] || '';
    return isTmux() && term.startsWith('screen') && !process.env['COLORTERM'];
}
/**
 * Detects if the terminal is a "dumb" terminal.
 */
export function isDumbTerminal() {
    const term = process.env['TERM'] || '';
    return term === 'dumb' || term === 'vt100';
}
/**
 * Detects if the current terminal is the default Apple Terminal.app.
 */
export function isAppleTerminal() {
    return process.env['TERM_PROGRAM'] === 'Apple_Terminal';
}
/**
 * Detects if the current terminal supports 256 colors (8-bit).
 */
export function supports256Colors() {
    // Check if stdout supports at least 8-bit color depth
    if (process.stdout.getColorDepth && process.stdout.getColorDepth() >= 8) {
        return true;
    }
    // Check TERM environment variable
    const term = process.env['TERM'] || '';
    if (term.includes('256color')) {
        return true;
    }
    return false;
}
/**
 * Detects if the current terminal supports true color (24-bit).
 */
export function supportsTrueColor() {
    // Check COLORTERM environment variable
    if (process.env['COLORTERM'] === 'truecolor' ||
        process.env['COLORTERM'] === '24bit') {
        return true;
    }
    // Check if stdout supports 24-bit color depth
    if (process.stdout.getColorDepth && process.stdout.getColorDepth() >= 24) {
        return true;
    }
    return false;
}
export var WarningPriority;
(function (WarningPriority) {
    WarningPriority["Low"] = "low";
    WarningPriority["High"] = "high";
})(WarningPriority || (WarningPriority = {}));
/**
 * Returns a list of compatibility warnings based on the current environment.
 */
export function getCompatibilityWarnings(options) {
    const warnings = [];
    if (isWindows10()) {
        warnings.push({
            id: 'windows-10',
            message: 'Warning: Windows 10 detected. Some UI features like smooth scrolling may be degraded. Windows 11 is recommended for the best experience.',
            priority: WarningPriority.High,
        });
    }
    if (isJetBrainsTerminal() && options?.isAlternateBuffer) {
        warnings.push({
            id: 'jetbrains-terminal',
            message: 'Warning: JetBrains terminal detected — alternate buffer mode may cause scroll wheel issues and rendering artifacts. If you experience problems, disable it in /settings → "Use Alternate Screen Buffer".',
            priority: WarningPriority.High,
        });
    }
    if (isTmux() && options?.isAlternateBuffer) {
        warnings.push({
            id: 'tmux-alternate-buffer',
            message: 'Warning: tmux detected — alternate buffer mode may cause unexpected scrollback loss and flickering. If you experience issues, disable it in /settings → "Use Alternate Screen Buffer".\n    Tip: Use Ctrl-b [ to access tmux copy mode for scrolling history.',
            priority: WarningPriority.High,
        });
    }
    if (isLowColorTmux()) {
        warnings.push({
            id: 'low-color-tmux',
            message: 'Warning: Limited color support detected (TERM=screen). Some visual elements may not render correctly. For better color support in tmux, add to ~/.tmux.conf:\n      set -g default-terminal "tmux-256color"\n      set -ga terminal-overrides ",*256col*:Tc"',
            priority: WarningPriority.High,
        });
    }
    if (isGnuScreen()) {
        warnings.push({
            id: 'gnu-screen',
            message: 'Warning: GNU screen detected. Some keyboard shortcuts and visual features may behave unexpectedly. For the best experience, consider using tmux or running Gemini CLI directly in your terminal.',
            priority: WarningPriority.Low,
        });
    }
    if (isDumbTerminal()) {
        const term = process.env['TERM'] || 'dumb';
        warnings.push({
            id: 'dumb-terminal',
            message: `Warning: Basic terminal detected (TERM=${term}). Visual rendering will be limited. For the best experience, use a terminal emulator with truecolor support.`,
            priority: WarningPriority.High,
        });
    }
    if (!supports256Colors()) {
        warnings.push({
            id: '256-color',
            message: 'Warning: 256-color support not detected. Using a terminal with at least 256-color support is recommended for a better visual experience.',
            priority: WarningPriority.High,
        });
    }
    else if (!supportsTrueColor() && !isAppleTerminal()) {
        warnings.push({
            id: 'true-color',
            message: 'Warning: True color (24-bit) support not detected. Using a terminal with true color enabled will result in a better visual experience.',
            priority: WarningPriority.Low,
        });
    }
    return warnings;
}
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