package commands

import (
	"encoding/gob"
	"fmt"
	"net/url"
	"os"
	"time"

	"flag"
	"path/filepath"
	"strings"

	"github.com/astaxie/beego"
	"github.com/astaxie/beego/logs"
	"github.com/astaxie/beego/orm"
	"github.com/lifei6671/gocaptcha"
	"github.com/lifei6671/godoc/commands/migrate"
	"github.com/lifei6671/godoc/conf"
	"github.com/lifei6671/godoc/models"
	"github.com/lifei6671/godoc/utils"
	"log"
)

var (
	ConfigurationFile = "./conf/app.conf"
	WorkingDirectory  = "./"
	LogFile           = "./logs"
)

// RegisterDataBase 注册数据库
func RegisterDataBase() {
	adapter := beego.AppConfig.String("db_adapter")

	if adapter == "mysql" {
		host := beego.AppConfig.String("db_host")
		database := beego.AppConfig.String("db_database")
		username := beego.AppConfig.String("db_username")
		password := beego.AppConfig.String("db_password")
		timezone := beego.AppConfig.String("timezone")

		port := beego.AppConfig.String("db_port")

		dataSource := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=true&loc=%s", username, password, host, port, database, url.QueryEscape(timezone))

		orm.RegisterDataBase("default", "mysql", dataSource)

		location, err := time.LoadLocation(timezone)
		if err == nil {
			orm.DefaultTimeLoc = location
		} else {
			log.Fatalln(err)
		}
	} else if adapter == "sqlite3" {
		database := beego.AppConfig.String("db_database")
		dbPath := filepath.Dir(database)
		os.MkdirAll(dbPath, 0777)

		orm.RegisterDataBase("default", "sqlite3", database)
	}
}

// RegisterModel 注册Model
func RegisterModel() {
	orm.RegisterModelWithPrefix(conf.GetDatabasePrefix(),
		new(models.Member),
		new(models.Book),
		new(models.Relationship),
		new(models.Option),
		new(models.Document),
		new(models.Attachment),
		new(models.Logger),
		new(models.MemberToken),
		new(models.DocumentHistory),
		new(models.Migration),
	)
	migrate.RegisterMigration()
}

// RegisterLogger 注册日志
func RegisterLogger(log string) {

	logs.SetLogFuncCall(true)
	logs.SetLogger("console")
	logs.EnableFuncCallDepth(true)
	logs.Async()

	logPath := filepath.Join(log, "log.log")

	if _, err := os.Stat(logPath); os.IsNotExist(err) {

		os.MkdirAll(log, 0777)

		if f, err := os.Create(logPath); err == nil {
			f.Close()
			beego.SetLogger("file", fmt.Sprintf(`{"filename":"%s"}`, logPath))
		}
	}

	beego.SetLogFuncCall(true)
	beego.BeeLogger.Async()
}

// RunCommand 注册orm命令行工具
func RegisterCommand() {

	if len(os.Args) >= 2 && os.Args[1] == "install" {
		ResolveCommand(os.Args[2:])
		Install()
	} else if len(os.Args) >= 2 && os.Args[1] == "version" {
		ResolveCommand(os.Args[2:])
		CheckUpdate()
	} else if len(os.Args) >= 2 && os.Args[1] == "migrate" {
		ResolveCommand(os.Args[2:])
		migrate.RunMigration()
	}
}

func RegisterFunction() {
	beego.AddFuncMap("config", models.GetOptionValue)

	beego.AddFuncMap("cdn", func(p string) string {
		cdn := beego.AppConfig.DefaultString("cdn", "")
		if strings.HasPrefix(p, "/") && strings.HasSuffix(cdn, "/") {
			return cdn + string(p[1:])
		}
		if !strings.HasPrefix(p, "/") && !strings.HasSuffix(cdn, "/") {
			return cdn + "/" + p
		}
		return cdn + p
	})

	beego.AddFuncMap("cdnjs", func(p string) string {
		cdn := beego.AppConfig.DefaultString("cdnjs", "")
		if strings.HasPrefix(p, "/") && strings.HasSuffix(cdn, "/") {
			return cdn + string(p[1:])
		}
		if !strings.HasPrefix(p, "/") && !strings.HasSuffix(cdn, "/") {
			return cdn + "/" + p
		}
		return cdn + p
	})
	beego.AddFuncMap("cdncss", func(p string) string {
		cdn := beego.AppConfig.DefaultString("cdncss", "")
		if strings.HasPrefix(p, "/") && strings.HasSuffix(cdn, "/") {
			return cdn + string(p[1:])
		}
		if !strings.HasPrefix(p, "/") && !strings.HasSuffix(cdn, "/") {
			return cdn + "/" + p
		}
		return cdn + p
	})
	beego.AddFuncMap("cdnimg", func(p string) string {
		cdn := beego.AppConfig.DefaultString("cdnimg", "")
		if strings.HasPrefix(p, "/") && strings.HasSuffix(cdn, "/") {
			return cdn + string(p[1:])
		}
		if !strings.HasPrefix(p, "/") && !strings.HasSuffix(cdn, "/") {
			return cdn + "/" + p
		}
		return cdn + p
	})
}

func ResolveCommand(args []string) {
	flagSet := flag.NewFlagSet("MinDoc command: ", flag.ExitOnError)
	flagSet.StringVar(&ConfigurationFile, "config", "", "MinDoc configuration file.")
	flagSet.StringVar(&WorkingDirectory, "dir", "", "MinDoc working directory.")
	flagSet.StringVar(&LogFile, "log", "", "MinDoc log file path.")

	flagSet.Parse(args)


	if WorkingDirectory == "" {
		if p, err := filepath.Abs(os.Args[0]); err == nil {
			WorkingDirectory = filepath.Dir(p)
		}
	}
	if LogFile == "" {
		LogFile = filepath.Join(WorkingDirectory,"logs")
	}
	if ConfigurationFile == "" {
		ConfigurationFile = filepath.Join(WorkingDirectory,"conf","app.conf")
		config :=  filepath.Join(WorkingDirectory,"conf","app.conf.example")
		if !utils.FileExists(ConfigurationFile) && utils.FileExists(config){
			utils.CopyFile(ConfigurationFile,config)
		}
	}

	err := beego.LoadAppConfig("ini", ConfigurationFile)

	if err != nil {
		log.Println("An error occurred:", err)
		os.Exit(1)
	}
	uploads := filepath.Join(WorkingDirectory, "uploads")

	os.MkdirAll(uploads,0666)

	beego.BConfig.WebConfig.StaticDir["/static"] = filepath.Join(WorkingDirectory, "static")
	beego.BConfig.WebConfig.StaticDir["/uploads"] = uploads
	beego.BConfig.WebConfig.ViewsPath = filepath.Join(WorkingDirectory, "views")

	fonts := filepath.Join(WorkingDirectory, "static", "fonts")

	if !utils.FileExists(fonts) {
		log.Fatal("Font path not exist.")
	}
	gocaptcha.ReadFonts(filepath.Join(WorkingDirectory, "static", "fonts"), ".ttf")

	RegisterDataBase()
	RegisterModel()
	RegisterLogger(LogFile)
}

func init() {

	gocaptcha.ReadFonts("./static/fonts", ".ttf")
	gob.Register(models.Member{})

	if p,err := filepath.Abs(os.Args[0]);err == nil{
		WorkingDirectory = filepath.Dir(p)
	}
}