package cache

import (
	"context"
	"git.libraryofcode.org/engineering/bces/config"
	"github.com/redis/go-redis/v9"
	"log"
)

// NewRedisConnection takes a Config parameter and connects to the RedisURL provided in the config. It returns an instance of Redis Client.
// This function will exit the program if it cannot parse the URL properly nor connect successfully, and therefore doesn't return an error.
func NewRedisConnection(config config.Config) *redis.Client {
	redisConnectionOptions, err := redis.ParseURL(config.RedisURL)
	if err != nil {
		log.Fatalf("Redis Connection URL is not valid or cannot parse given Connection URL: %s.\n\n%s", config.RedisURL, err)
	}
	redisClient := redis.NewClient(redisConnectionOptions)

	redisPingResponse, err := redisClient.Ping(context.Background()).Result()
	if err != nil {
		log.Fatalf("Could not ping Redis.\n\n%s", err)
	}
	log.Printf("Connected to Redis DB at <%s>: %s", config.RedisURL, redisPingResponse)

	return redisClient
}