#!/bin/bash
set -e

REDIS_PORT="${REDIS_PORT:-6379}"
REDIS_PASSWORD="${REDIS_PASSWORD:-}"
REDIS_MAXMEMORY="${REDIS_MAXMEMORY:-100mb}"
REDIS_MAXMEMORY_POLICY="${REDIS_MAXMEMORY_POLICY:-allkeys-lru}"
REDIS_DATA_DIR="${REDIS_DATA_DIR:-/data/redis}"
REDIS_APPENDONLY="${REDIS_APPENDONLY:-yes}"
REDIS_SAVE="${REDIS_SAVE:-900 1 300 10 60 10000}"

# Build REDIS_URL
if [ -n "$REDIS_PASSWORD" ]; then
    export REDIS_URL="redis://:${REDIS_PASSWORD}@localhost:${REDIS_PORT}"
else
    export REDIS_URL="redis://localhost:${REDIS_PORT}"
fi
echo "REDIS_URL=$REDIS_URL"

# Write to shared env file for other skills
mkdir -p /run/vibestack
echo "REDIS_URL=$REDIS_URL" > /run/vibestack/redis.env

# Build command arguments
args=()
args+=("--port" "$REDIS_PORT")
args+=("--dir" "$REDIS_DATA_DIR")
args+=("--maxmemory" "$REDIS_MAXMEMORY")
args+=("--maxmemory-policy" "$REDIS_MAXMEMORY_POLICY")
args+=("--appendonly" "$REDIS_APPENDONLY")

# Add authentication if set
if [ -n "$REDIS_PASSWORD" ]; then
    args+=("--requirepass" "$REDIS_PASSWORD")
fi

# Configure RDB persistence
# REDIS_SAVE format: "seconds changes [seconds changes ...]"
if [ -n "$REDIS_SAVE" ]; then
    # Parse save intervals (e.g., "900 1 300 10 60 10000")
    read -ra save_args <<< "$REDIS_SAVE"
    for ((i=0; i<${#save_args[@]}; i+=2)); do
        if [ $((i+1)) -lt ${#save_args[@]} ]; then
            args+=("--save" "${save_args[i]} ${save_args[i+1]}")
        fi
    done
fi

# Bind to all interfaces
args+=("--bind" "0.0.0.0")

# Enable protected mode only if no password
if [ -z "$REDIS_PASSWORD" ]; then
    args+=("--protected-mode" "yes")
else
    args+=("--protected-mode" "no")
fi

echo "Starting Redis on port $REDIS_PORT..."
echo "Max memory: $REDIS_MAXMEMORY"
echo "Eviction policy: $REDIS_MAXMEMORY_POLICY"
echo "Persistence: AOF=$REDIS_APPENDONLY"

exec redis-server "${args[@]}"