package config

import (
	"fmt"
	"github.com/ilyakaznacheev/cleanenv"
	"github.com/joho/godotenv"
	"log"
	"os"
	"path"
	"path/filepath"
	"runtime"
	"strings"
	"time"
)

type Config struct {
	Database struct {
		Driver   string `yaml:"driver" env:"DB_DRIVER"`
		Port     string `yaml:"port" env:"DB_PORT" env-default:"3306"`
		Host     string `yaml:"host" env:"DB_HOST"`
		Name     string `yaml:"name" env:"DB_DATABASE"`
		User     string `yaml:"user" env:"DB_USERNAME"`
		Password string `yaml:"password" env:"DB_PASSWORD"`
		Charset  string `yaml:"charset" env:"DB_CHARSET"`
		Prefix   string `yaml:"prefix" env:"DB_PREFIX"`
	} `yaml:"database"`

	Redis struct {
		Host     string `yaml:"host" env:"REDIS_HOST"`
		Password string `yaml:"password" env:"REDIS_PASSWORD"`
		Prefix   string `yaml:"prefix" env:"REDIS_PREFIX"`
	} `yaml:"redis"`

	Log struct {
		Filename   string `yaml:"filename"`
		MaxSize    int    `yaml:"max_size"`
		MaxBackups int    `yaml:"max_backups"`
		MaxAge     int    `yaml:"max_age"`
		Compress   bool   `yaml:"compress"`
	} `yaml:"log"`

	Server struct {
		PidFile      string        `yaml:"pid_file"`
		RunMode      string        `yaml:"run_mode" env:"RUN_MODE"`
		HttpPort     int           `yaml:"http_port"`
		ReadTimeout  time.Duration `yaml:"read_timeout"`
		WriteTimeout time.Duration `yaml:"write_timeout"`
	} `yaml:"server"`

	App struct {
		ProductionUrl string `yaml:"production_url"`
		TokenExpire   int    `yaml:"token_expire" env:"TOKEN_EXPIRE"`
		PageLimitMin  int    `yaml:"page_limit_min"`
		PageLimitMax  int    `yaml:"page_limit_max"`
		ImgHost       string `yaml:"img_host"`
		ServiceTel    string `yaml:"service_tel"`
		DataPath      string `yaml:"data_path"`
		ExportPath    string `yaml:"export_path"`
		WeixinPath    string `yaml:"weixin_path"`
	} `yaml:"app"`

	Sms struct {
		AppID        string `yaml:"app_id"`
		AccessKey    string `yaml:"access_key"`
		AccessSecret string `yaml:"access_secret"`
	} `yaml:"sms"`

	Qiniu struct {
		Bucket    string `yaml:"bucket"`
		AccessKey string `yaml:"access_key"`
		SecretKey string `yaml:"secret_key"`
	} `yaml:"qiniu"`
}

var Cfg Config

// setup with option
type Option struct {
	file string
	env  string
}

type OptionFunc func(opt *Option)

func WithFile(file string) OptionFunc {
	return func(opt *Option) {
		opt.file = file
	}
}

func WithEnv(env string) OptionFunc {
	return func(opt *Option) {
		opt.env = env
	}
}

func GetRootPath() string {
	dir := getCurrentAbPathByExecutable()
	if strings.Contains(dir, "tmp") {
		return getCurrentAbPathByCaller()
	}
	return dir
}

func getCurrentAbPathByExecutable() string {
	exePath, err := os.Executable()
	if err != nil {
		log.Fatal(err)
	}
	res, _ := filepath.EvalSymlinks(filepath.Dir(exePath))
	return res + "/"
}

func getCurrentAbPathByCaller() string {
	var abPath string
	_, filename, _, ok := runtime.Caller(0)
	if ok {
		abPath = filepath.Join(path.Dir(filename), "../..") + "/"
	}
	return abPath
}

func Setup(options ...OptionFunc) {
	rootPath := GetRootPath()
	fmt.Println(rootPath)
	opt := Option{
		file: rootPath + "config/config.yml",
		env:  rootPath + ".env",
		//file: "config/config.yml",
		//env:  ".env",
	}
	for _, fun := range options {
		fun(&opt)
	}

	err := godotenv.Load(opt.env)
	if err != nil {
		log.Fatal("Error loading .env file")
	}
	var config Config
	err = cleanenv.ReadConfig(opt.file, &config)
	if err != nil {
		panic(err)
	}

	config.Server.ReadTimeout = config.Server.ReadTimeout * time.Second
	config.Server.WriteTimeout = config.Server.ReadTimeout * time.Second
	Cfg = config
}