package web

import (
	"fmt"
	"io"
	"net/http"
	"path"
	"strings"
	"time"

	ice "shylinux.com/x/icebergs"
	"shylinux.com/x/icebergs/base/ctx"
	"shylinux.com/x/icebergs/base/log"
	"shylinux.com/x/icebergs/base/mdb"
	"shylinux.com/x/icebergs/base/nfs"
	"shylinux.com/x/icebergs/base/tcp"
	kit "shylinux.com/x/toolkits"
)

const (
	COOKIE = "cookie"
	STATUS = "status"
)

func Render(m *ice.Message, cmd string, args ...ice.Any) bool {
	if cmd == ice.RENDER_VOID {
		return true
	}
	arg := kit.Simple(args...)
	kit.If(len(arg) == 0, func() { args = nil })
	if cmd != "" {
		if cmd != ice.RENDER_DOWNLOAD || !kit.HasPrefix(arg[0], ice.USR_VOLCANOS, ice.USR_INTSHELL) {
			defer func() { m.Logs("Render", cmd, args) }()
		}
	}
	switch cmd {
	case COOKIE: // value [name [path [expire]]]
		RenderCookie(m, arg[0], arg[1:]...)
	case STATUS, ice.RENDER_STATUS: // [code [text]]
		RenderStatus(m.W, kit.Int(kit.Select("200", arg, 0)), strings.Join(kit.Slice(arg, 1), " "))
	case ice.RENDER_REDIRECT: // url [arg...]
		http.Redirect(m.W, m.R, kit.MergeURL(arg[0], arg[1:]), http.StatusTemporaryRedirect)
	case ice.RENDER_DOWNLOAD: // file [type [name]]
		if strings.HasPrefix(arg[0], HTTP) {
			RenderRedirect(m, arg[0])
			break
		}
		RenderType(m.W, arg[0], kit.Select("", arg, 1))
		RenderHeader(m.W, "Content-Disposition", fmt.Sprintf("filename=%s", kit.Select(path.Base(kit.Select(arg[0], m.Option("filename"))), arg, 2)))
		if _, e := nfs.DiskFile.StatFile(arg[0]); e == nil {
			http.ServeFile(m.W, m.R, kit.Path(arg[0]))
		} else if f, e := nfs.PackFile.OpenFile(arg[0]); e == nil {
			defer f.Close()
			io.Copy(m.W, f)
		}
	case ice.RENDER_RESULT:
		if len(arg) > 0 { // [str [arg...]]
			m.W.Write([]byte(kit.Format(arg[0], args[1:]...)))
		} else {
			if m.Result() == "" && m.Length() > 0 {
				m.TableEcho()
			}
			m.W.Write([]byte(m.Result()))
		}
	case ice.RENDER_JSON:
		RenderType(m.W, nfs.JSON, "")
		m.W.Write([]byte(arg[0]))
	default:
		if cmd != "" && cmd != ice.RENDER_RAW {
			m.Echo(kit.Format(cmd, args...))
		}
		RenderType(m.W, nfs.JSON, "")
		m.FormatsMeta(m.W)
	}
	m.Render(ice.RENDER_VOID)
	return true
}

func CookieName(url string) string { return ice.MSG_SESSID + "_" + kit.ParseURLMap(url)[tcp.PORT] }
func RenderCookie(m *ice.Message, value string, arg ...string) { // name path expire
	http.SetCookie(m.W, &http.Cookie{Value: value, Name: kit.Select(CookieName(m.Option(ice.MSG_USERWEB)), arg, 0),
		Path: kit.Select(nfs.PS, arg, 1), Expires: time.Now().Add(kit.Duration(kit.Select(mdb.MONTH, arg, 2)))})
}
func RenderType(w http.ResponseWriter, name, mime string) {
	if mime == "" {
		switch kit.Ext(name) {
		case "", nfs.HTML:
			mime = "text/html"
		case nfs.CSS:
			mime = "text/css; charset=utf-8"
		default:
			mime = "application/" + kit.Ext(name)
		}
	}
	RenderHeader(w, ContentType, mime)
}
func RenderOrigin(w http.ResponseWriter, origin string) {
	RenderHeader(w, "Access-Control-Allow-Origin", origin)
}
func RenderHeader(w http.ResponseWriter, key, value string) {
	w.Header().Set(key, value)
}
func RenderStatus(w http.ResponseWriter, code int, text string) {
	w.WriteHeader(code)
	w.Write([]byte(text))
}
func RenderRedirect(m *ice.Message, arg ...ice.Any) {
	Render(m, ice.RENDER_REDIRECT, arg...)
}
func RenderDownload(m *ice.Message, arg ...ice.Any) {
	Render(m, ice.RENDER_DOWNLOAD, arg...)
}
func RenderResult(m *ice.Message, arg ...ice.Any) {
	Render(m, ice.RENDER_RESULT, arg...)
}
func RenderTemplate(m *ice.Message, file string, arg ...ice.Any) *ice.Message {
	return m.RenderResult(kit.Renders(kit.Format(m.Cmdx(nfs.CAT, path.Join(ice.SRC_TEMPLATE, WEB, file)), arg...), m))
}
func RenderRefresh(m *ice.Message, arg ...string) { // url text delay
	RenderTemplate(m, "refresh.html", kit.Select("3", arg, 2), kit.Select(m.Option(ice.MSG_USERWEB), arg, 0), kit.Select("loading...", arg, 1))
}
func RenderMain(m *ice.Message) *ice.Message {
	if m.IsCliUA() {
		return m.RenderDownload(path.Join(ice.USR_INTSHELL, ice.INDEX_SH))
	}
	m.OptionDefault(nfs.VERSION, RenderVersion(m))
	return RenderTemplate(m, "main.html")
}
func RenderCmds(m *ice.Message, list ...ice.Any) {
	m.OptionDefault(nfs.VERSION, RenderVersion(m))
	RenderTemplate(m.Options(mdb.LIST, kit.Format(list)), "cmds.html")
}
func RenderPodCmd(m *ice.Message, pod, cmd string, arg ...ice.Any) {
	msg := m.Cmd(Space(m, pod), ctx.COMMAND, kit.Select(m.PrefixKey(), cmd))
	RenderCmds(m, kit.Dict(msg.AppendSimple(mdb.NAME, mdb.HELP),
		ctx.INDEX, msg.Append(ctx.INDEX), ctx.ARGS, kit.Simple(arg), ctx.DISPLAY, m.Option(ice.MSG_DISPLAY),
		mdb.LIST, kit.UnMarshal(msg.Append(mdb.LIST)), mdb.META, kit.UnMarshal(msg.Append(mdb.META)),
	))
}
func RenderCmd(m *ice.Message, cmd string, arg ...ice.Any) { RenderPodCmd(m, "", cmd, arg...) }

func RenderVersion(m *ice.Message) string {
	if ice.Info.Make.Hash == "" {
		return ""
	}
	ls := []string{ice.Info.Make.Version, ice.Info.Make.Forword, ice.Info.Make.Hash[:6]}
	if m.Option(log.DEBUG) == ice.TRUE || m.R != nil && strings.Contains(m.R.URL.RawQuery, "debug=true") {
		ls = append(ls, kit.Format("%d", time.Now().Unix()-kit.Time(ice.Info.Make.When)/int64(time.Second)))
	}
	return "?_v=" + strings.Join(ls, "-")
}

const (
	DARK    = "dark"
	LIGHT   = "light"
	BLACK   = "black"
	DISPLAY = "display"
	RESIZE  = "resize"
	LAYOUT  = "layout"
	OUTPUT  = "output"
	INPUT   = "input"
	VIEW    = "view"
	CHAT    = "chat"

	CHAT_POD = "/chat/pod/"
	CHAT_CMD = "/chat/cmd/"

	CODE_GIT_SERVICE = "web.code.git.service"
	CODE_GIT_STATUS  = "web.code.git.status"
	CODE_GIT_REPOS   = "web.code.git.repos"
	CODE_COMPILE     = "web.code.compile"
	CODE_UPGRADE     = "web.code.upgrade"
	CODE_VIMER       = "web.code.vimer"
	CODE_INNER       = "web.code.inner"
	CODE_XTERM       = "web.code.xterm"
	WIKI_WORD        = "web.wiki.word"
	WIKI_DRAW        = "web.wiki.draw"
	WIKI_FEEL        = "web.wiki.feel"
	CHAT_IFRAME      = "web.chat.iframe"
	CHAT_FAVOR       = "web.chat.favor"
	CHAT_FLOWS       = "web.chat.flows"
	TEAM_PLAN        = "web.team.plan"
)