#!/usr/bin/env bash
# Install claude-statusline for the current user.
# Usage: bash install.sh
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
INSTALL_DIR="${HOME}/.local/share/claude-statusline"
CONFIG_DIR="${HOME}/.config/claude-statusline"
CLAUDE_DIR="${HOME}/.claude"

# --- Check Node.js version (need 18+ for built-in fetch) ---
NODE_BIN="$(which node 2>/dev/null || echo '')"
if [ -z "$NODE_BIN" ]; then
    echo "ERROR: Node.js not found. Install Node.js 18+ first."
    exit 1
fi
NODE_MAJOR=$("$NODE_BIN" -e "process.stdout.write(String(process.versions.node.split('.')[0]))")
if [ "$NODE_MAJOR" -lt 18 ]; then
    echo "ERROR: Node.js $("$NODE_BIN" --version) found, but 18+ is required (built-in fetch)."
    exit 1
fi
echo "==> Node.js v${NODE_MAJOR} found at $NODE_BIN"

echo "==> Installing claude-statusline..."

# Copy scripts
mkdir -p "$INSTALL_DIR"
cp "$SCRIPT_DIR/statusline.js" "$INSTALL_DIR/"
cp "$SCRIPT_DIR/fetch-usage.js" "$INSTALL_DIR/"
chmod +x "$INSTALL_DIR"/*.js

# Create config dir
mkdir -p "$CONFIG_DIR"
if [ ! -f "$CONFIG_DIR/session-key" ]; then
    echo "# Paste your claude.ai sessionKey cookie value here" > "$CONFIG_DIR/session-key"
    chmod 600 "$CONFIG_DIR/session-key"
    echo "    Created $CONFIG_DIR/session-key (edit with your session key)"
fi

# Configure Claude Code statusline
mkdir -p "$CLAUDE_DIR"
SETTINGS="$CLAUDE_DIR/settings.json"

if [ -f "$SETTINGS" ]; then
    if grep -q '"statusLine"' "$SETTINGS" 2>/dev/null; then
        echo "    statusLine already configured in $SETTINGS — skipping"
    else
        "$NODE_BIN" -e "
const fs = require('fs');
const settings = JSON.parse(fs.readFileSync('$SETTINGS', 'utf8'));
settings.statusLine = {
  type: 'command',
  command: '$NODE_BIN --no-warnings $INSTALL_DIR/statusline.js'
};
fs.writeFileSync('$SETTINGS', JSON.stringify(settings, null, 2) + '\n');
"
        echo "    Added statusLine to $SETTINGS"
    fi
else
    cat > "$SETTINGS" <<SEOF
{
  "statusLine": {
    "type": "command",
    "command": "${NODE_BIN} --no-warnings ${INSTALL_DIR}/statusline.js"
  }
}
SEOF
    echo "    Created $SETTINGS with statusLine config"
fi

# Offer cron setup
echo ""
echo "==> Optional: set up usage fetcher cron (every 5 min):"
echo "    crontab -e"
echo "    */5 * * * * ${NODE_BIN} ${INSTALL_DIR}/fetch-usage.js 2>/dev/null"
echo ""
echo "==> Done! Restart Claude Code to see the statusline."
echo "    Don't forget to add your session key to: $CONFIG_DIR/session-key"