// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.

package api

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

	l4g "code.google.com/p/log4go"
	"github.com/gorilla/mux"
	// "github.com/mattermost/platform/model"
	// "github.com/mattermost/platform/utils"
)

// type commandHandler func(c *Context, command *model.Command) bool

// var (
// 	cmds = map[string]string{
// 		"logoutCommand":   "/logout",
// 		"joinCommand":     "/join",
// 		"loadTestCommand": "/loadtest",
// 		"echoCommand":     "/echo",
// 		"shrugCommand":    "/shrug",
// 		"meCommand":       "/me",
// 	}
// 	commands = []commandHandler{
// 		logoutCommand,
// 		joinCommand,
// 		loadTestCommand,
// 		echoCommand,
// 		shrugCommand,
// 		meCommand,
// 	}
// 	commandNotImplementedErr = model.NewAppError("checkCommand", "Command not implemented", "")
// )
// var echoSem chan bool

func InitCommand(r *mux.Router) {
	l4g.Debug("Initializing command api routes")
	//	r.Handle("/command", ApiUserRequired(command)).Methods("POST")
}

// func command(c *Context, w http.ResponseWriter, r *http.Request) {

// 	props := model.MapFromJson(r.Body)

// 	command := &model.Command{
// 		Command:     strings.TrimSpace(props["command"]),
// 		ChannelId:   strings.TrimSpace(props["channelId"]),
// 		Suggest:     props["suggest"] == "true",
// 		Suggestions: make([]*model.SuggestCommand, 0, 128),
// 	}

// 	checkCommand(c, command)
// 	if c.Err != nil {
// 		if c.Err != commandNotImplementedErr {
// 			return
// 		} else {
// 			c.Err = nil
// 			command.Response = model.RESP_NOT_IMPLEMENTED
// 			w.Write([]byte(command.ToJson()))
// 			return
// 		}
// 	} else {
// 		w.Write([]byte(command.ToJson()))
// 	}
// }

// func checkCommand(c *Context, command *model.Command) bool {

// 	if len(command.Command) == 0 || strings.Index(command.Command, "/") != 0 {
// 		c.Err = model.NewAppError("checkCommand", "Command must start with /", "")
// 		return false
// 	}

// 	if len(command.ChannelId) > 0 {
// 		cchan := Srv.Store.Channel().CheckPermissionsTo(c.Session.TeamId, command.ChannelId, c.Session.UserId)

// 		if !c.HasPermissionsToChannel(cchan, "checkCommand") {
// 			return true
// 		}
// 	}

// 	if !command.Suggest {
// 		implemented := false
// 		for _, cmd := range cmds {
// 			bounds := len(cmd)
// 			if len(command.Command) < bounds {
// 				continue
// 			}
// 			if command.Command[:bounds] == cmd {
// 				implemented = true
// 			}
// 		}
// 		if !implemented {
// 			c.Err = commandNotImplementedErr
// 			return false
// 		}
// 	}

// 	for _, v := range commands {

// 		if v(c, command) || c.Err != nil {
// 			return true
// 		}
// 	}

// 	return false
// }

// func logoutCommand(c *Context, command *model.Command) bool {

// 	cmd := cmds["logoutCommand"]

// 	if strings.Index(command.Command, cmd) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Logout"})

// 		if !command.Suggest {
// 			command.GotoLocation = "/logout"
// 			command.Response = model.RESP_EXECUTED
// 			return true
// 		}

// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Logout"})
// 	}

// 	return false
// }

// func echoCommand(c *Context, command *model.Command) bool {
// 	cmd := cmds["echoCommand"]
// 	maxThreads := 100

// 	if !command.Suggest && strings.Index(command.Command, cmd) == 0 {
// 		parameters := strings.SplitN(command.Command, " ", 2)
// 		if len(parameters) != 2 || len(parameters[1]) == 0 {
// 			return false
// 		}
// 		message := strings.Trim(parameters[1], " ")
// 		delay := 0
// 		if endMsg := strings.LastIndex(message, "\""); string(message[0]) == "\"" && endMsg > 1 {
// 			if checkDelay, err := strconv.Atoi(strings.Trim(message[endMsg:], " \"")); err == nil {
// 				delay = checkDelay
// 			}
// 			message = message[1:endMsg]
// 		} else if strings.Index(message, " ") > -1 {
// 			delayIdx := strings.LastIndex(message, " ")
// 			delayStr := strings.Trim(message[delayIdx:], " ")

// 			if checkDelay, err := strconv.Atoi(delayStr); err == nil {
// 				delay = checkDelay
// 				message = message[:delayIdx]
// 			}
// 		}

// 		if delay > 10000 {
// 			c.Err = model.NewAppError("echoCommand", "Delays must be under 10000 seconds", "")
// 			return false
// 		}

// 		if echoSem == nil {
// 			// We want one additional thread allowed so we never reach channel lockup
// 			echoSem = make(chan bool, maxThreads+1)
// 		}

// 		if len(echoSem) >= maxThreads {
// 			c.Err = model.NewAppError("echoCommand", "High volume of echo request, cannot process request", "")
// 			return false
// 		}

// 		echoSem <- true
// 		go func() {
// 			defer func() { <-echoSem }()
// 			post := &model.Post{}
// 			post.ChannelId = command.ChannelId
// 			post.Message = message

// 			time.Sleep(time.Duration(delay) * time.Second)

// 			if _, err := CreatePost(c, post, true); err != nil {
// 				l4g.Error("Unable to create /echo post, err=%v", err)
// 			}
// 		}()

// 		command.Response = model.RESP_EXECUTED
// 		return true

// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Echo back text from your account, /echo \"message\" [delay in seconds]"})
// 	}

// 	return false
// }

// func meCommand(c *Context, command *model.Command) bool {
// 	cmd := cmds["meCommand"]

// 	if !command.Suggest && strings.Index(command.Command, cmd) == 0 {
// 		message := ""

// 		parameters := strings.SplitN(command.Command, " ", 2)
// 		if len(parameters) > 1 {
// 			message += "*" + parameters[1] + "*"
// 		}

// 		post := &model.Post{}
// 		post.Message = message
// 		post.ChannelId = command.ChannelId
// 		if _, err := CreatePost(c, post, false); err != nil {
// 			l4g.Error("Unable to create /me post post, err=%v", err)
// 			return false
// 		}
// 		command.Response = model.RESP_EXECUTED
// 		return true

// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Do an action, /me [message]"})
// 	}

// 	return false
// }

// func shrugCommand(c *Context, command *model.Command) bool {
// 	cmd := cmds["shrugCommand"]

// 	if !command.Suggest && strings.Index(command.Command, cmd) == 0 {
// 		message := `¯\\\_(ツ)_/¯`

// 		parameters := strings.SplitN(command.Command, " ", 2)
// 		if len(parameters) > 1 {
// 			message += " " + parameters[1]
// 		}

// 		post := &model.Post{}
// 		post.Message = message
// 		post.ChannelId = command.ChannelId
// 		if _, err := CreatePost(c, post, false); err != nil {
// 			l4g.Error("Unable to create /shrug post post, err=%v", err)
// 			return false
// 		}
// 		command.Response = model.RESP_EXECUTED
// 		return true

// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Adds ¯\\_(ツ)_/¯ to your message, /shrug [message]"})
// 	}

// 	return false
// }

// func joinCommand(c *Context, command *model.Command) bool {

// 	// looks for "/join channel-name"
// 	cmd := cmds["joinCommand"]

// 	if strings.Index(command.Command, cmd) == 0 {

// 		parts := strings.Split(command.Command, " ")

// 		startsWith := ""

// 		if len(parts) == 2 {
// 			startsWith = parts[1]
// 		}

// 		if result := <-Srv.Store.Channel().GetMoreChannels(c.Session.TeamId, c.Session.UserId); result.Err != nil {
// 			c.Err = result.Err
// 			return false
// 		} else {
// 			channels := result.Data.(*model.ChannelList)

// 			for _, v := range channels.Channels {

// 				if v.Name == startsWith && !command.Suggest {

// 					if v.Type == model.CHANNEL_DIRECT {
// 						return false
// 					}

// 					JoinChannel(c, v.Id, "")

// 					if c.Err != nil {
// 						return false
// 					}

// 					command.GotoLocation = c.GetTeamURL() + "/channels/" + v.Name
// 					command.Response = model.RESP_EXECUTED
// 					return true
// 				}

// 				if len(startsWith) == 0 || strings.Index(v.Name, startsWith) == 0 {
// 					command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd + " " + v.Name, Description: "Join the open channel"})
// 				}
// 			}
// 		}
// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Join an open channel"})
// 	}

// 	return false
// }

// func loadTestCommand(c *Context, command *model.Command) bool {
// 	cmd := cmds["loadTestCommand"]

// 	// This command is only available when EnableTesting is true
// 	if !utils.Cfg.ServiceSettings.EnableTesting {
// 		return false
// 	}

// 	if strings.Index(command.Command, cmd) == 0 {
// 		if loadTestSetupCommand(c, command) {
// 			return true
// 		}
// 		if loadTestUsersCommand(c, command) {
// 			return true
// 		}
// 		if loadTestChannelsCommand(c, command) {
// 			return true
// 		}
// 		if loadTestPostsCommand(c, command) {
// 			return true
// 		}
// 		if loadTestUrlCommand(c, command) {
// 			return true
// 		}
// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Debug Load Testing"})
// 	}

// 	return false
// }

// func parseRange(command string, cmd string) (utils.Range, bool) {
// 	tokens := strings.Fields(strings.TrimPrefix(command, cmd))
// 	var begin int
// 	var end int
// 	var err1 error
// 	var err2 error
// 	switch {
// 	case len(tokens) == 1:
// 		begin, err1 = strconv.Atoi(tokens[0])
// 		end = begin
// 		if err1 != nil {
// 			return utils.Range{0, 0}, false
// 		}
// 	case len(tokens) >= 2:
// 		begin, err1 = strconv.Atoi(tokens[0])
// 		end, err2 = strconv.Atoi(tokens[1])
// 		if err1 != nil || err2 != nil {
// 			return utils.Range{0, 0}, false
// 		}
// 	default:
// 		return utils.Range{0, 0}, false
// 	}
// 	return utils.Range{begin, end}, true
// }

// func contains(items []string, token string) bool {
// 	for _, elem := range items {
// 		if elem == token {
// 			return true
// 		}
// 	}
// 	return false
// }

// func loadTestSetupCommand(c *Context, command *model.Command) bool {
// 	cmd := cmds["loadTestCommand"] + " setup"

// 	if strings.Index(command.Command, cmd) == 0 && !command.Suggest {
// 		tokens := strings.Fields(strings.TrimPrefix(command.Command, cmd))
// 		doTeams := contains(tokens, "teams")
// 		doFuzz := contains(tokens, "fuzz")

// 		numArgs := 0
// 		if doTeams {
// 			numArgs++
// 		}
// 		if doFuzz {
// 			numArgs++
// 		}

// 		var numTeams int
// 		var numChannels int
// 		var numUsers int
// 		var numPosts int

// 		// Defaults
// 		numTeams = 10
// 		numChannels = 10
// 		numUsers = 10
// 		numPosts = 10

// 		if doTeams {
// 			if (len(tokens) - numArgs) >= 4 {
// 				numTeams, _ = strconv.Atoi(tokens[numArgs+0])
// 				numChannels, _ = strconv.Atoi(tokens[numArgs+1])
// 				numUsers, _ = strconv.Atoi(tokens[numArgs+2])
// 				numPosts, _ = strconv.Atoi(tokens[numArgs+3])
// 			}
// 		} else {
// 			if (len(tokens) - numArgs) >= 3 {
// 				numChannels, _ = strconv.Atoi(tokens[numArgs+0])
// 				numUsers, _ = strconv.Atoi(tokens[numArgs+1])
// 				numPosts, _ = strconv.Atoi(tokens[numArgs+2])
// 			}
// 		}
// 		client := model.NewClient(c.GetSiteURL())

// 		if doTeams {
// 			if err := CreateBasicUser(client); err != nil {
// 				l4g.Error("Failed to create testing environment")
// 				return true
// 			}
// 			client.LoginByEmail(BTEST_TEAM_NAME, BTEST_USER_EMAIL, BTEST_USER_PASSWORD)
// 			environment, err := CreateTestEnvironmentWithTeams(
// 				client,
// 				utils.Range{numTeams, numTeams},
// 				utils.Range{numChannels, numChannels},
// 				utils.Range{numUsers, numUsers},
// 				utils.Range{numPosts, numPosts},
// 				doFuzz)
// 			if err != true {
// 				l4g.Error("Failed to create testing environment")
// 				return true
// 			} else {
// 				l4g.Info("Testing environment created")
// 				for i := 0; i < len(environment.Teams); i++ {
// 					l4g.Info("Team Created: " + environment.Teams[i].Name)
// 					l4g.Info("\t User to login: " + environment.Environments[i].Users[0].Email + ", " + USER_PASSWORD)
// 				}
// 			}
// 		} else {
// 			client.MockSession(c.Session.Token)
// 			CreateTestEnvironmentInTeam(
// 				client,
// 				c.Session.TeamId,
// 				utils.Range{numChannels, numChannels},
// 				utils.Range{numUsers, numUsers},
// 				utils.Range{numPosts, numPosts},
// 				doFuzz)
// 		}
// 		return true
// 	} else if strings.Index(cmd, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{
// 			Suggestion:  cmd,
// 			Description: "Creates a testing environment in current team. [teams] [fuzz] <Num Channels> <Num Users> <NumPosts>"})
// 	}

// 	return false
// }

// func loadTestUsersCommand(c *Context, command *model.Command) bool {
// 	cmd1 := cmds["loadTestCommand"] + " users"
// 	cmd2 := cmds["loadTestCommand"] + " users fuzz"

// 	if strings.Index(command.Command, cmd1) == 0 && !command.Suggest {
// 		cmd := cmd1
// 		doFuzz := false
// 		if strings.Index(command.Command, cmd2) == 0 {
// 			doFuzz = true
// 			cmd = cmd2
// 		}
// 		usersr, err := parseRange(command.Command, cmd)
// 		if err == false {
// 			usersr = utils.Range{10, 15}
// 		}
// 		client := model.NewClient(c.GetSiteURL())
// 		userCreator := NewAutoUserCreator(client, c.Session.TeamId)
// 		userCreator.Fuzzy = doFuzz
// 		userCreator.CreateTestUsers(usersr)
// 		return true
// 	} else if strings.Index(cmd1, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd1, Description: "Add a specified number of random users to current team <Min Users> <Max Users>"})
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd2, Description: "Add a specified number of random users with fuzz text to current team <Min Users> <Max Users>"})
// 	} else if strings.Index(cmd2, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd2, Description: "Add a specified number of random users with fuzz text to current team <Min Users> <Max Users>"})
// 	}

// 	return false
// }

// func loadTestChannelsCommand(c *Context, command *model.Command) bool {
// 	cmd1 := cmds["loadTestCommand"] + " channels"
// 	cmd2 := cmds["loadTestCommand"] + " channels fuzz"

// 	if strings.Index(command.Command, cmd1) == 0 && !command.Suggest {
// 		cmd := cmd1
// 		doFuzz := false
// 		if strings.Index(command.Command, cmd2) == 0 {
// 			doFuzz = true
// 			cmd = cmd2
// 		}
// 		channelsr, err := parseRange(command.Command, cmd)
// 		if err == false {
// 			channelsr = utils.Range{20, 30}
// 		}
// 		client := model.NewClient(c.GetSiteURL())
// 		client.MockSession(c.Session.Token)
// 		channelCreator := NewAutoChannelCreator(client, c.Session.TeamId)
// 		channelCreator.Fuzzy = doFuzz
// 		channelCreator.CreateTestChannels(channelsr)
// 		return true
// 	} else if strings.Index(cmd1, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd1, Description: "Add a specified number of random channels to current team <MinChannels> <MaxChannels>"})
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd2, Description: "Add a specified number of random channels with fuzz text to current team <Min Channels> <Max Channels>"})
// 	} else if strings.Index(cmd2, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd2, Description: "Add a specified number of random channels with fuzz text to current team <Min Channels> <Max Channels>"})
// 	}

// 	return false
// }

// func loadTestPostsCommand(c *Context, command *model.Command) bool {
// 	cmd1 := cmds["loadTestCommand"] + " posts"
// 	cmd2 := cmds["loadTestCommand"] + " posts fuzz"

// 	if strings.Index(command.Command, cmd1) == 0 && !command.Suggest {
// 		cmd := cmd1
// 		doFuzz := false
// 		if strings.Index(command.Command, cmd2) == 0 {
// 			cmd = cmd2
// 			doFuzz = true
// 		}

// 		postsr, err := parseRange(command.Command, cmd)
// 		if err == false {
// 			postsr = utils.Range{20, 30}
// 		}

// 		tokens := strings.Fields(strings.TrimPrefix(command.Command, cmd))
// 		rimages := utils.Range{0, 0}
// 		if len(tokens) >= 3 {
// 			if numImages, err := strconv.Atoi(tokens[2]); err == nil {
// 				rimages = utils.Range{numImages, numImages}
// 			}
// 		}

// 		var usernames []string
// 		if result := <-Srv.Store.User().GetProfiles(c.Session.TeamId); result.Err == nil {
// 			profileUsers := result.Data.(map[string]*model.User)
// 			usernames = make([]string, len(profileUsers))
// 			i := 0
// 			for _, userprof := range profileUsers {
// 				usernames[i] = userprof.Username
// 				i++
// 			}
// 		}

// 		client := model.NewClient(c.GetSiteURL())
// 		client.MockSession(c.Session.Token)
// 		testPoster := NewAutoPostCreator(client, command.ChannelId)
// 		testPoster.Fuzzy = doFuzz
// 		testPoster.Users = usernames

// 		numImages := utils.RandIntFromRange(rimages)
// 		numPosts := utils.RandIntFromRange(postsr)
// 		for i := 0; i < numPosts; i++ {
// 			testPoster.HasImage = (i < numImages)
// 			testPoster.CreateRandomPost()
// 		}
// 		return true
// 	} else if strings.Index(cmd1, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd1, Description: "Add some random posts to current channel <Min Posts> <Max Posts> <Min Images> <Max Images>"})
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd2, Description: "Add some random posts with fuzz text to current channel <Min Posts> <Max Posts> <Min Images> <Max Images>"})
// 	} else if strings.Index(cmd2, command.Command) == 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd2, Description: "Add some random posts with fuzz text to current channel <Min Posts> <Max Posts> <Min Images> <Max Images>"})
// 	}

// 	return false
// }

// func loadTestUrlCommand(c *Context, command *model.Command) bool {
// 	cmd := cmds["loadTestCommand"] + " url"

// 	if strings.Index(command.Command, cmd) == 0 && !command.Suggest {
// 		url := ""

// 		parameters := strings.SplitN(command.Command, " ", 3)
// 		if len(parameters) != 3 {
// 			c.Err = model.NewAppError("loadTestUrlCommand", "Command must contain a url", "")
// 			return true
// 		} else {
// 			url = parameters[2]
// 		}

// 		// provide a shortcut to easily access tests stored in doc/developer/tests
// 		if !strings.HasPrefix(url, "http") {
// 			url = "https://raw.githubusercontent.com/mattermost/platform/master/doc/developer/tests/" + url

// 			if path.Ext(url) == "" {
// 				url += ".md"
// 			}
// 		}

// 		var contents io.ReadCloser
// 		if r, err := http.Get(url); err != nil {
// 			c.Err = model.NewAppError("loadTestUrlCommand", "Unable to get file", err.Error())
// 			return false
// 		} else if r.StatusCode > 400 {
// 			c.Err = model.NewAppError("loadTestUrlCommand", "Unable to get file", r.Status)
// 			return false
// 		} else {
// 			contents = r.Body
// 		}

// 		bytes := make([]byte, 4000)

// 		// break contents into 4000 byte posts
// 		for {
// 			length, err := contents.Read(bytes)
// 			if err != nil && err != io.EOF {
// 				c.Err = model.NewAppError("loadTestUrlCommand", "Encountered error reading file", err.Error())
// 				return false
// 			}

// 			if length == 0 {
// 				break
// 			}

// 			post := &model.Post{}
// 			post.Message = string(bytes[:length])
// 			post.ChannelId = command.ChannelId

// 			if _, err := CreatePost(c, post, false); err != nil {
// 				l4g.Error("Unable to create post, err=%v", err)
// 				return false
// 			}
// 		}

// 		command.Response = model.RESP_EXECUTED

// 		return true
// 	} else if strings.Index(cmd, command.Command) == 0 && strings.Index(command.Command, "/loadtest posts") != 0 {
// 		command.AddSuggestion(&model.SuggestCommand{Suggestion: cmd, Description: "Add a post containing the text from a given url to current channel <Url>"})
// 	}

// 	return false
// }