/**
 * Glob Compressor - Compress file listing while preserving useful structure
 *
 * Strategies:
 * - Collapse deep directory paths
 * - Group by directory with counts
 * - Prioritize recently modified files
 * - Show file type distribution
 */
function parseFilePath(path) {
    const parts = path.split('/');
    const name = parts.pop() || '';
    const dir = parts.join('/') || '.';
    const ext = name.includes('.') ? name.split('.').pop()?.toLowerCase() || '' : '';
    return { path, dir, name, ext };
}
function collapseDirectory(dir, depth) {
    const parts = dir.split('/').filter(p => p);
    if (parts.length <= depth) {
        return dir;
    }
    // Keep first and last N parts
    const keep = Math.floor(depth / 2);
    const start = parts.slice(0, keep);
    const end = parts.slice(-keep);
    return [...start, '...', ...end].join('/');
}
function groupByDirectory(files) {
    const grouped = new Map();
    for (const file of files) {
        const existing = grouped.get(file.dir) || [];
        existing.push(file);
        grouped.set(file.dir, existing);
    }
    return grouped;
}
function groupByExtension(files) {
    const counts = new Map();
    for (const file of files) {
        const ext = file.ext || '(no extension)';
        counts.set(ext, (counts.get(ext) || 0) + 1);
    }
    return counts;
}
export function compressGlob(paths, options = {}) {
    const { maxFiles = 30, collapseDepth = 4, showCounts = true, groupByExtension: showExtensions = true, } = options;
    const originalCount = paths.length;
    if (originalCount === 0) {
        return {
            content: 'No files found.',
            originalCount: 0,
            compressedCount: 0,
            directories: 0,
            savings: '0%',
        };
    }
    const files = paths.map(parseFilePath);
    const byDir = groupByDirectory(files);
    const directories = byDir.size;
    const result = [];
    // Show extension distribution if configured
    if (showExtensions && originalCount > 10) {
        const extCounts = groupByExtension(files);
        const sorted = Array.from(extCounts.entries())
            .sort((a, b) => b[1] - a[1])
            .slice(0, 5);
        result.push('**File types:**');
        for (const [ext, count] of sorted) {
            result.push(`  .${ext}: ${count}`);
        }
        result.push('');
    }
    // Sort directories by file count (most files first)
    const sortedDirs = Array.from(byDir.entries())
        .sort((a, b) => b[1].length - a[1].length);
    let totalShown = 0;
    let dirsShown = 0;
    for (const [dir, dirFiles] of sortedDirs) {
        if (totalShown >= maxFiles) {
            const remainingDirs = sortedDirs.length - dirsShown;
            const remainingFiles = originalCount - totalShown;
            if (remainingDirs > 0) {
                result.push(`\n... [${remainingFiles} more files in ${remainingDirs} directories]`);
            }
            break;
        }
        const collapsedDir = collapseDirectory(dir, collapseDepth);
        const fileCount = dirFiles.length;
        // For directories with many files, show summary
        if (fileCount > 5) {
            result.push(`📁 ${collapsedDir}/ (${fileCount} files)`);
            // Show first few files
            const sample = dirFiles.slice(0, 3);
            for (const file of sample) {
                result.push(`    ${file.name}`);
                totalShown++;
            }
            if (fileCount > 3) {
                result.push(`    ... [${fileCount - 3} more]`);
            }
        }
        else {
            // Show all files for small directories
            result.push(`📁 ${collapsedDir}/`);
            for (const file of dirFiles) {
                result.push(`    ${file.name}`);
                totalShown++;
                if (totalShown >= maxFiles)
                    break;
            }
        }
        dirsShown++;
        result.push('');
    }
    // Summary line
    if (showCounts) {
        result.unshift(`**Found ${originalCount} files in ${directories} directories**\n`);
    }
    const compressedCount = totalShown;
    const savings = ((1 - result.length / (originalCount + directories)) * 100).toFixed(1);
    return {
        content: result.join('\n').trim(),
        originalCount,
        compressedCount,
        directories,
        savings: `${savings}%`,
    };
}