#!/bin/sh
# Installs the kban CLI from https://kban.dev
# Usage: curl -fsSL https://kban.dev/install | sh
set -eu

DIR="${KBAN_INSTALL_DIR:-${KANBAN_INSTALL_DIR:-$HOME/.local/bin}}"

if command -v node >/dev/null 2>&1 && node -e 'process.exit(Number(process.versions.node.split(".")[0]) >= 18 ? 0 : 1)'; then
  RUNTIME=node
elif command -v bun >/dev/null 2>&1; then
  RUNTIME=bun
else
  echo "kban: needs Node.js 18+ or Bun. Install one of them and re-run this script." >&2
  exit 1
fi

mkdir -p "$DIR"
WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT
curl -fsSL "https://kban.dev/kban.js" -o "$WORK/download"
if [ "$(head -c 2 "$WORK/download")" != "#!" ]; then
  echo "kban: the download from https://kban.dev/kban.js doesn't look like the CLI. Try again in a minute." >&2
  exit 1
fi
# Point the shebang at whichever runtime is available, and check it runs before replacing anything.
{ echo "#!/usr/bin/env $RUNTIME"; tail -n +2 "$WORK/download"; } > "$WORK/kban"
chmod +x "$WORK/kban"
if ! VERSION="$("$WORK/kban" --version)"; then
  echo "kban: the downloaded CLI failed to run with $RUNTIME." >&2
  exit 1
fi
mv "$WORK/kban" "$DIR/kban"
# The CLI used to be called kanban: keep that name working, replacing an older copy installed under it.
ln -sf kban "$DIR/kanban"

echo "Installed $VERSION to $DIR/kban (kanban works too)"
# Keep an installed Claude Code skill in step with the CLI.
if { [ -f "$HOME/.claude/skills/kban/SKILL.md" ] || [ -f "$HOME/.claude/skills/kanban/SKILL.md" ]; } && "$DIR/kban" install-skill >/dev/null; then
  echo "Updated the Claude Code skill (/kban next)"
fi
case ":$PATH:" in
  *":$DIR:"*) ;;
  *) echo "Add it to your PATH:  export PATH=\"$DIR:\$PATH\"" ;;
esac
echo "Next: kban init <project-url>   (or: kban new \"Project title\")"
echo "Claude Code: kban install-skill adds /kban next, which works through the board's Todo column"