#!/usr/bin/env bash
# install.sh — Set up claude-statusline symlinks
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
CLAUDE_DIR="$HOME/.claude"

echo "claude-statusline installer"
echo "==========================="
echo ""

# Check dependencies
if ! command -v jq &>/dev/null; then
  echo "ERROR: jq is required but not installed."
  echo "  macOS:  brew install jq"
  echo "  Ubuntu: sudo apt install jq"
  echo "  Fedora: sudo dnf install jq"
  exit 1
fi
echo "[ok] jq found"

# Check bash version
if (( BASH_VERSINFO[0] < 4 )); then
  echo "WARNING: bash 4+ recommended (you have ${BASH_VERSION})"
  echo "  macOS ships bash 3. Install bash 4+:"
  echo "    brew install bash"
fi

# Ensure ~/.claude exists
mkdir -p "$CLAUDE_DIR"

# Create symlinks
create_link() {
  local src="$1" dst="$2" name="$3"
  if [[ -L "$dst" ]]; then
    local existing
    existing="$(readlink "$dst")"
    if [[ "$existing" == "$src" ]]; then
      echo "[ok] $name already linked"
      return
    fi
    echo "[update] $name: updating symlink"
    ln -sf "$src" "$dst"
  elif [[ -f "$dst" ]]; then
    echo "[skip] $name: $dst exists as a regular file"
    echo "  To use the symlink, rename or remove the existing file first."
    return
  else
    ln -s "$src" "$dst"
    echo "[ok] $name linked"
  fi
}

create_link "$SCRIPT_DIR/statusline.sh" "$CLAUDE_DIR/statusline.sh" "statusline.sh"

# Optionally link user config if they want to start from an example
if [[ ! -f "$CLAUDE_DIR/statusline.json" ]]; then
  echo "[info] No statusline.json found. You can copy an example from:"
  echo "       $SCRIPT_DIR/examples/"
fi

echo ""
echo "Symlinks created. Now add the status line to your Claude Code settings."
echo ""
echo "Add this to ~/.claude/settings.json:"
echo ""
echo '  "statusLine": "'$CLAUDE_DIR'/statusline.sh"'
echo ""
echo "If ~/.claude/settings.json doesn't exist yet, create it:"
echo ""
echo '  {'
echo '    "statusLine": "'$CLAUDE_DIR'/statusline.sh"'
echo '  }'
echo ""
echo "Then restart Claude Code to see the status line."