package beego

import (
	"fmt"
	"github.com/astaxie/session"
	_ "github.com/astaxie/session/providers/memory"
	"html/template"
	"net"
	"net/http"
	"net/http/fcgi"
	"os"
	"path"
	"strconv"
)

const VERSION = "0.4.0"

var (
	BeeApp        *App
	AppName       string
	AppPath       string
	StaticDir     map[string]string
	TemplateCache map[string]*template.Template
	HttpAddr      string
	HttpPort      int
	RecoverPanic  bool
	AutoRender    bool
	PprofOn       bool
	ViewsPath     string
	RunMode       string //"dev" or "prod"
	AppConfig     *Config
	//related to session 
	SessionOn            bool   // wheather auto start session,default is false
	SessionProvider      string // default session provider  memory
	SessionName          string // sessionName cookie's name
	SessionGCMaxLifetime int64  // session's gc maxlifetime
	UseFcgi              bool

	GlobalSessions *session.Manager //GlobalSessions
)

func init() {
	BeeApp = NewApp()
	AppPath, _ = os.Getwd()
	StaticDir = make(map[string]string)
	TemplateCache = make(map[string]*template.Template)
	var err error
	AppConfig, err = LoadConfig(path.Join(AppPath, "conf", "app.conf"))
	if err != nil {
		//Trace("open Config err:", err)
		HttpAddr = ""
		HttpPort = 8080
		AppName = "beego"
		RunMode = "prod" //default runmod
		AutoRender = true
		RecoverPanic = true
		PprofOn = false
		ViewsPath = "views"
		SessionOn = false
		SessionProvider = "memory"
		SessionName = "beegosessionID"
		SessionGCMaxLifetime = 3600
		UseFcgi = false
	} else {
		HttpAddr = AppConfig.String("httpaddr")
		if v, err := AppConfig.Int("httpport"); err != nil {
			HttpPort = 8080
		} else {
			HttpPort = v
		}
		AppName = AppConfig.String("appname")
		if runmode := AppConfig.String("runmode"); runmode != "" {
			RunMode = runmode
		} else {
			RunMode = "prod"
		}
		if ar, err := AppConfig.Bool("autorender"); err != nil {
			AutoRender = true
		} else {
			AutoRender = ar
		}
		if ar, err := AppConfig.Bool("autorecover"); err != nil {
			RecoverPanic = true
		} else {
			RecoverPanic = ar
		}
		if ar, err := AppConfig.Bool("pprofon"); err != nil {
			PprofOn = false
		} else {
			PprofOn = ar
		}
		if views := AppConfig.String("viewspath"); views == "" {
			ViewsPath = "views"
		} else {
			ViewsPath = views
		}
		if ar, err := AppConfig.Bool("sessionon"); err != nil {
			SessionOn = false
		} else {
			SessionOn = ar
		}
		if ar := AppConfig.String("sessionprovider"); ar == "" {
			SessionProvider = "memory"
		} else {
			SessionProvider = ar
		}
		if ar := AppConfig.String("sessionname"); ar == "" {
			SessionName = "beegosessionID"
		} else {
			SessionName = ar
		}
		if ar, err := AppConfig.Int("sessiongcmaxlifetime"); err != nil && ar != 0 {
			int64val, _ := strconv.ParseInt(strconv.Itoa(ar), 10, 64)
			SessionGCMaxLifetime = int64val
		} else {
			SessionGCMaxLifetime = 3600
		}
		if ar, err := AppConfig.Bool("usefcgi"); err != nil {
			UseFcgi = false
		} else {
			UseFcgi = ar
		}
	}
	StaticDir["/static"] = "static"

}

type App struct {
	Handlers *ControllerRegistor
}

// New returns a new PatternServeMux.
func NewApp() *App {
	cr := NewControllerRegistor()
	app := &App{Handlers: cr}
	return app
}

func (app *App) Run() {
	addr := fmt.Sprintf("%s:%d", HttpAddr, HttpPort)
	var err error
	if UseFcgi {
		l, e := net.Listen("tcp", addr)
		if e != nil {
			BeeLogger.Fatal("Listen: ", e)
		}
		err = fcgi.Serve(l, app.Handlers)
	} else {
		err = http.ListenAndServe(addr, app.Handlers)
	}
	if err != nil {
		BeeLogger.Fatal("ListenAndServe: ", err)
	}
}

func (app *App) RegisterController(path string, c ControllerInterface) *App {
	app.Handlers.Add(path, c)
	return app
}

func (app *App) Filter(filter http.HandlerFunc) *App {
	app.Handlers.Filter(filter)
	return app
}

func (app *App) FilterParam(param string, filter http.HandlerFunc) *App {
	app.Handlers.FilterParam(param, filter)
	return app
}

func (app *App) FilterPrefixPath(path string, filter http.HandlerFunc) *App {
	app.Handlers.FilterPrefixPath(path, filter)
	return app
}

func (app *App) SetViewsPath(path string) *App {
	ViewsPath = path
	return app
}

func (app *App) SetStaticPath(url string, path string) *App {
	StaticDir[url] = path
	return app
}

func (app *App) ErrorLog(ctx *Context) {
	BeeLogger.Printf("[ERR] host: '%s', request: '%s %s', proto: '%s', ua: '%s', remote: '%s'\n", ctx.Request.Host, ctx.Request.Method, ctx.Request.URL.Path, ctx.Request.Proto, ctx.Request.UserAgent(), ctx.Request.RemoteAddr)
}

func (app *App) AccessLog(ctx *Context) {
	BeeLogger.Printf("[ACC] host: '%s', request: '%s %s', proto: '%s', ua: %s'', remote: '%s'\n", ctx.Request.Host, ctx.Request.Method, ctx.Request.URL.Path, ctx.Request.Proto, ctx.Request.UserAgent(), ctx.Request.RemoteAddr)
}

func RegisterController(path string, c ControllerInterface) *App {
	BeeApp.RegisterController(path, c)
	return BeeApp
}

func Filter(filter http.HandlerFunc) *App {
	BeeApp.Filter(filter)
	return BeeApp
}

func FilterParam(param string, filter http.HandlerFunc) *App {
	BeeApp.FilterParam(param, filter)
	return BeeApp
}

func FilterPrefixPath(path string, filter http.HandlerFunc) *App {
	BeeApp.FilterPrefixPath(path, filter)
	return BeeApp
}

func Run() {
	if PprofOn {
		BeeApp.RegisterController(`/debug/pprof`, &ProfController{})
		BeeApp.RegisterController(`/debug/pprof/:pp([\w]+)`, &ProfController{})
	}
	if SessionOn {
		GlobalSessions, _ = session.NewManager(SessionProvider, SessionName, SessionGCMaxLifetime)
		go GlobalSessions.GC()
	}
	err := BuildTemplate(ViewsPath)
	if err != nil {
		Warn(err)
	}
	BeeApp.Run()
}