#!/usr/bin/env bash
OUT="README.md"
ROOT="$(pwd)"

cat > "$OUT" <<EOF
# Wallpapers Collection

## Table of Contents
EOF

# Generate TOC
for dir in */; do
  dir_name="${dir%/}"
  cat >> "$OUT" <<EOF
- [${dir_name}](#${dir_name,,}|sed='s/ /-/g|sed='s/[^a-z0-9-]//g')
EOF
done

cat >> "$OUT" <<EOF

EOF

# Add sections
for dir in */; do
  dir_name="${dir%/}"
  anchor=$(echo "$dir_name" | tr '[:upper:]' '[:lower:]' | sed 's/ /-/g; s/[^a-z0-9-]//g')
  cat >> "$OUT" <<EOF
---

## ${dir_name} <a name="${anchor}"></a>

EOF
  for img in "$dir"*.*; do
    [ -f "$img" ] || continue
    fn="$(basename "${img%.*}")"
    rel="${dir}${fn}${img##*.}"
    cat >> "$OUT" <<EOF
### ${fn}

![${fn}](${rel})

EOF
  done
done