package redis

import (
	"fmt"
	"log"
	"os"
	"time"

	"github.com/gomodule/redigo/redis"
	"qoobing.com/gomod/redis/logging"
	"qoobing.com/gomod/redis/sentinel"
)

type Config = sentinel.Config

func NewPool(cfg Config) *redis.Pool {
	if cfg.Master == "" {
		panic("config is invalid: Master is empty")
	} else if cfg.Master != "" && cfg.MasterName != "" {
		//panic("config is invalid: Master & MasterName must not set both")
	}
	var (
		masterAddr     = cfg.Master
		masterUsername = cfg.Username
		masterPassword = cfg.Password
	)
	if cfg.Wait == nil {
		cfg.Wait = new(bool)
		*cfg.Wait = true
	}

	if cfg.IdleTimeout == nil {
		cfg.IdleTimeout = new(int)
		*cfg.IdleTimeout = 300
	} else if *cfg.IdleTimeout <= 0 {
		*cfg.IdleTimeout = 86400 * 365 * 10
	}

	if cfg.MaxIdle == nil {
		cfg.MaxIdle = new(int)
		*cfg.MaxIdle = 100
	} else if *cfg.MaxIdle < 0 {
		*cfg.MaxIdle = 100
	}

	if cfg.MaxActive == nil {
		cfg.MaxActive = new(int)
		*cfg.MaxActive = 100
	} else if *cfg.MaxActive < 0 {
		*cfg.MaxActive = 100
	}

	var (
		logPrefix    = "redis"
		logStdPrefix = "DBUG "
		logStdWriter = os.Stdout
		logStdFlags  = log.Ldate | log.Lmicroseconds | log.Lshortfile
		logStdLogger = log.New(logStdWriter, logStdPrefix, logStdFlags)
	)
	return &redis.Pool{
		MaxIdle:     *cfg.MaxIdle,
		MaxActive:   *cfg.MaxActive,
		Wait:        *cfg.Wait,
		IdleTimeout: time.Duration(*cfg.IdleTimeout) * time.Second,
		Dial: func() (redis.Conn, error) {
			c, err := redis.Dial("tcp", masterAddr)
			if err != nil {
				return nil, err
			}

			var okstr = "OK"
			if masterPassword != "" && masterUsername != "" {
				okstr, err = redis.String(c.Do("AUTH", masterUsername, masterPassword))
			} else if masterPassword != "" {
				okstr, err = redis.String(c.Do("AUTH", masterPassword))
			}

			if err != nil {
				return nil, fmt.Errorf("redis master AUTH failed: <%s>", err.Error())
			} else if okstr != "OK" {
				return nil, fmt.Errorf("redis master AUTH failed: <%s>", okstr)
			}

			//// if !TestRole(c, "master") {
			//// 	c.Close()
			//// 	err = fmt.Errorf(
			//// 		"master(%s) got by name '%s' is not redis master",
			//// 		masterAddr, masterName)
			//// 	return nil, err
			//// }

			if cfg.Debug {
				c = logging.NewLoggingConn(c, logStdLogger, logPrefix)
			}
			return c, nil
		},
	}
}