package redisx

import (
	"context"
	"fmt"
	"time"

	"github.com/redis/go-redis/v9"
)

type Client struct {
	rdb *redis.Client
}

// Options configure Open. Empty Addr skips the connection for local bring-up.
type Options struct {
	Addr     string
	Username string
	Password string
	DB       int
}

func Open(o *Options) (*Client, error) {
	if o == nil || o.Addr == "" {
		return &Client{}, nil
	}
	rdb := redis.NewClient(&redis.Options{
		Addr:         o.Addr,
		Username:     o.Username,
		Password:     o.Password,
		DB:           o.DB,
		DialTimeout:  10 * time.Second,
		ReadTimeout:  5 * time.Second,
		WriteTimeout: 5 * time.Second,
	})
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()
	if err := rdb.Ping(ctx).Err(); err != nil {
		_ = rdb.Close()
		return nil, fmt.Errorf("redis ping: %w", err)
	}
	return &Client{rdb: rdb}, nil
}

func (c *Client) RDB() *redis.Client { return c.rdb }

func (c *Client) Close() error {
	if c == nil || c.rdb == nil {
		return nil
	}
	return c.rdb.Close()
}

func (c *Client) Ready() bool { return c != nil && c.rdb != nil }

func (c *Client) Ping(ctx context.Context) error {
	if !c.Ready() {
		return nil
	}
	return c.rdb.Ping(ctx).Err()
}