package beego

import (
	"fmt"
	"github.com/astaxie/beego/session"
	"html/template"
	"net"
	"net/http"
	"net/http/fcgi"
	"os"
	"path"
	"runtime"
	"time"
)

const VERSION = "0.7.2"

var (
	BeeApp        *App
	AppName       string
	AppPath       string
	AppConfigPath 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
	GlobalSessions       *session.Manager //GlobalSessions
	SessionOn            bool             // wheather auto start session,default is false
	SessionProvider      string           // default session provider  memory mysql redis
	SessionName          string           // sessionName cookie's name
	SessionGCMaxLifetime int64            // session's gc maxlifetime
	SessionSavePath      string           // session savepath if use mysql/redis/file this set to the connectinfo
	UseFcgi              bool
	MaxMemory            int64
	EnableGzip           bool // enable gzip
	DirectoryIndex       bool //ebable DirectoryIndex default is false
	EnbaleHotUpdate      bool //enable HotUpdate default is false
	HttpServerTimeOut    int64
	ErrorsShow           bool
	XSRFKEY              string
)

func init() {
	os.Chdir(path.Dir(os.Args[0]))
	BeeApp = NewApp()
	AppPath, _ = os.Getwd()
	StaticDir = make(map[string]string)
	TemplateCache = make(map[string]*template.Template)
	HttpAddr = ""
	HttpPort = 8080
	AppName = "beego"
	RunMode = "dev" //default runmod
	AutoRender = true
	RecoverPanic = true
	PprofOn = false
	ViewsPath = "views"
	SessionOn = false
	SessionProvider = "memory"
	SessionName = "beegosessionID"
	SessionGCMaxLifetime = 3600
	SessionSavePath = ""
	UseFcgi = false
	MaxMemory = 1 << 26 //64MB
	EnableGzip = false
	StaticDir["/static"] = "static"
	AppConfigPath = path.Join(AppPath, "conf", "app.conf")
	HttpServerTimeOut = 0
	ErrorsShow = true
	XSRFKEY = "beegoxsrf"
	ParseConfig()
}

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
		l   net.Listener
	)
	if UseFcgi {
		l, err = net.Listen("tcp", addr)
		if err != nil {
			BeeLogger.Fatal("Listen: ", err)
		}
		err = fcgi.Serve(l, app.Handlers)
	} else {
		if EnbaleHotUpdate {
			server := &http.Server{
				Handler:      app.Handlers,
				ReadTimeout:  time.Duration(HttpServerTimeOut) * time.Second,
				WriteTimeout: time.Duration(HttpServerTimeOut) * time.Second,
			}
			laddr, err := net.ResolveTCPAddr("tcp", addr)
			if nil != err {
				BeeLogger.Fatal("ResolveTCPAddr:", err)
			}
			l, err = GetInitListner(laddr)
			theStoppable = newStoppable(l)
			err = server.Serve(theStoppable)
			theStoppable.wg.Wait()
			CloseSelf()
		} else {
			s := &http.Server{
				Addr:         addr,
				Handler:      app.Handlers,
				ReadTimeout:  time.Duration(HttpServerTimeOut) * time.Second,
				WriteTimeout: time.Duration(HttpServerTimeOut) * time.Second,
			}
			err = s.ListenAndServe()
		}

	}
	if err != nil {
		BeeLogger.Fatal("ListenAndServe: ", err)
	}
}

func (app *App) Router(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) DelStaticPath(url string) *App {
	delete(StaticDir, url)
	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.Router(path, c)
	return BeeApp
}

func Router(rootpath string, c ControllerInterface) *App {
	BeeApp.Router(rootpath, c)
	return BeeApp
}

func RESTRouter(rootpath string, c ControllerInterface) *App {
	Router(rootpath, c)
	Router(path.Join(rootpath, ":objectId"), c)
	return BeeApp
}

func RouterHandler(path string, c http.Handler) *App {
	BeeApp.Handlers.AddHandler(path, c)
	return BeeApp
}

func Errorhandler(err string, h http.HandlerFunc) *App {
	ErrorMaps[err] = h
	return BeeApp
}

func SetViewsPath(path string) *App {
	BeeApp.SetViewsPath(path)
	return BeeApp
}

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

func DelStaticPath(url string) *App {
	delete(StaticDir, url)
	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 AppConfigPath != path.Join(AppPath, "conf", "app.conf") {
		err := ParseConfig()
		if err != nil {
			if RunMode == "dev" {
				Warn(err)
			}
		}
	}
	if PprofOn {
		BeeApp.Router(`/debug/pprof`, &ProfController{})
		BeeApp.Router(`/debug/pprof/:pp([\w]+)`, &ProfController{})
	}
	if SessionOn {
		GlobalSessions, _ = session.NewManager(SessionProvider, SessionName, SessionGCMaxLifetime, SessionSavePath)
		go GlobalSessions.GC()
	}
	err := BuildTemplate(ViewsPath)
	if err != nil {
		if RunMode == "dev" {
			Warn(err)
		}
	}
	runtime.GOMAXPROCS(runtime.NumCPU())
	registerErrorHander()
	BeeApp.Run()
}