/**
 * Animated welcome screen for the experimental artifact workflow setup.
 * Shows side-by-side layout with animated ASCII art on left and welcome text on right.
 */
import chalk from 'chalk';
import { WELCOME_ANIMATION } from './ascii-patterns.js';
// Minimum terminal width for side-by-side layout
const MIN_WIDTH = 60;
// Width of the ASCII art column (with padding)
const ART_COLUMN_WIDTH = 24;
/**
 * Welcome text content (right column)
 */
function getWelcomeText() {
    return [
        chalk.white.bold('Welcome to ProjectX'),
        chalk.dim('A lightweight spec-driven framework'),
        '',
        chalk.white('This setup will configure:'),
        chalk.dim('  • Agent Skills for AI tools'),
        chalk.dim('  • /prox:* slash commands'),
        '',
        chalk.white('Quick start after setup:'),
        `  ${chalk.yellow('/prox:new')}      ${chalk.dim('Create a change')}`,
        `  ${chalk.yellow('/prox:continue')} ${chalk.dim('Next artifact')}`,
        `  ${chalk.yellow('/prox:apply')}    ${chalk.dim('Implement tasks')}`,
        '',
        chalk.cyan('Press Enter to select tools...'),
    ];
}
/**
 * Renders a single frame with side-by-side layout
 */
function renderFrame(artLines, textLines) {
    const maxLines = Math.max(artLines.length, textLines.length);
    const lines = [];
    for (let i = 0; i < maxLines; i++) {
        const artLine = artLines[i] || '';
        const textLine = textLines[i] || '';
        // Pad the art column to fixed width
        const paddedArt = artLine.padEnd(ART_COLUMN_WIDTH);
        // Color the ASCII art with cyan for visual appeal
        const coloredArt = chalk.cyan(paddedArt);
        // Clear line before writing to prevent residual characters
        lines.push(`\x1b[2K${coloredArt}${textLine}`);
    }
    return lines.join('\n');
}
/**
 * Checks if the terminal supports animation
 */
function canAnimate() {
    // Must be TTY
    if (!process.stdout.isTTY)
        return false;
    // Respect NO_COLOR
    if (process.env.NO_COLOR)
        return false;
    // Check terminal width
    const columns = process.stdout.columns || 80;
    if (columns < MIN_WIDTH)
        return false;
    return true;
}
/**
 * Wait for Enter key press
 */
function waitForEnter() {
    return new Promise((resolve) => {
        const { stdin } = process;
        // Handle non-TTY gracefully
        if (!stdin.isTTY) {
            resolve();
            return;
        }
        const wasRaw = stdin.isRaw;
        stdin.setRawMode(true);
        stdin.resume();
        const onData = (data) => {
            const char = data.toString();
            // Enter key or Ctrl+C
            if (char === '\r' || char === '\n' || char === '\u0003') {
                stdin.removeListener('data', onData);
                stdin.setRawMode(wasRaw);
                stdin.pause();
                // Handle Ctrl+C
                if (char === '\u0003') {
                    process.stdout.write('\n');
                    process.exit(0);
                }
                resolve();
            }
        };
        stdin.on('data', onData);
    });
}
/**
 * Shows the animated welcome screen.
 * Returns when user presses Enter.
 */
export async function showWelcomeScreen() {
    const textLines = getWelcomeText();
    if (!canAnimate()) {
        // Fallback: show static welcome
        const frame = WELCOME_ANIMATION.frames[3]; // Peak frame
        process.stdout.write('\n' + renderFrame(frame, textLines) + '\n\n');
        return;
    }
    let frameIndex = 0;
    let running = true;
    let isFirstRender = true;
    // Content height for cursor movement between frames
    const numContentLines = Math.max(WELCOME_ANIMATION.frames[0].length, textLines.length);
    const frameHeight = numContentLines + 1; // internal newlines (11) + trailing newlines (2) = 13
    // Total height including initial newline (for cleanup)
    const totalHeight = frameHeight + 1; // 14
    // Initial render
    process.stdout.write('\n');
    // Animation loop
    const interval = setInterval(() => {
        if (!running)
            return;
        const frame = WELCOME_ANIMATION.frames[frameIndex];
        // Move cursor up to overwrite previous frame (always after first render)
        if (!isFirstRender) {
            process.stdout.write(`\x1b[${frameHeight}A`);
        }
        isFirstRender = false;
        // Render current frame
        process.stdout.write(renderFrame(frame, textLines) + '\n\n');
        // Advance to next frame
        frameIndex = (frameIndex + 1) % WELCOME_ANIMATION.frames.length;
    }, WELCOME_ANIMATION.interval);
    // Wait for Enter
    await waitForEnter();
    // Stop animation
    running = false;
    clearInterval(interval);
    // Clear the welcome screen and move on
    process.stdout.write(`\x1b[${totalHeight}A`);
    for (let i = 0; i < totalHeight; i++) {
        process.stdout.write('\x1b[2K\n'); // Clear line
    }
    process.stdout.write(`\x1b[${totalHeight}A`); // Move back up
}
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