#!/bin/bash
set -e

REDIS_DATA_DIR="${REDIS_DATA_DIR:-/data/redis}"
SKILLS_DIR="${SKILLS_DIR:-/skills}"

# Idempotent Redis installation
install_redis() {
    if command -v redis-server &>/dev/null; then
        echo "Redis already installed: $(redis-server --version)"
        return 0
    fi

    echo "Installing Redis..."

    # Install dependencies
    apt-get update
    apt-get install -y curl gpg lsb-release

    # Add Redis repository
    curl -fsSL https://packages.redis.io/gpg | gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg
    echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" > /etc/apt/sources.list.d/redis.list

    # Install Redis
    apt-get update
    apt-get install -y redis

    echo "Redis installed: $(redis-server --version)"
}

# Setup directories
setup_dirs() {
    mkdir -p "$REDIS_DATA_DIR"
    chown -R redis:redis "$REDIS_DATA_DIR" 2>/dev/null || true
    chmod 755 "$REDIS_DATA_DIR"

    echo "Redis data directory: $REDIS_DATA_DIR"
}

# Configure Caddy if present
configure_caddy() {
    local caddy_dir="$SKILLS_DIR/caddy"
    local redis_domain="${REDIS_DOMAIN:-}"
    local redis_port="${REDIS_PORT:-6379}"

    if [ ! -d "$caddy_dir" ]; then
        echo "Caddy not found - Redis will run standalone"
        return 0
    fi

    if [ -z "$redis_domain" ]; then
        echo "REDIS_DOMAIN not set - skipping Caddy config"
        return 0
    fi

    echo "Caddy detected - configuring reverse proxy..."

    local snippets_dir="$caddy_dir/snippets.d"
    mkdir -p "$snippets_dir"

    cat > "$snippets_dir/redis.caddy" << EOF
# Auto-generated by redis skill
# Note: Redis protocol is not HTTP - this is for Redis Insight or similar tools
# $redis_domain {
#     reverse_proxy localhost:$redis_port
# }
EOF

    echo "Caddy snippet created (manual config needed for Redis)"
}

install_redis
setup_dirs
configure_caddy

echo "Redis setup complete"