// Statup
// Copyright (C) 2018.  Hunter Long and the project contributors
// Written by Hunter Long <info@socialeck.com> and the project contributors
//
// https://github.com/hunterlong/statup
//
// The licenses for most software and other practical works are designed
// to take away your freedom to share and change the works.  By contrast,
// the GNU General Public License is intended to guarantee your freedom to
// share and change all versions of a program--to make sure it remains free
// software for all its users.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"encoding/json"
	"errors"
	"fmt"
	"github.com/hunterlong/statup/core"
	"github.com/hunterlong/statup/handlers"
	"github.com/hunterlong/statup/plugin"
	"github.com/hunterlong/statup/source"
	"github.com/hunterlong/statup/utils"
	"github.com/joho/godotenv"
	"io/ioutil"
	"net/http"
	"time"
)

// catchCLI will run functions based on the commands sent to Statup
func catchCLI(args []string) error {
	dir := utils.Directory
	utils.InitLogs()
	source.Assets()
	loadDotEnvs()

	switch args[0] {
	case "app":
		handlers.DesktopInit(ipAddress, port)
	case "version":
		if COMMIT != "" {
			fmt.Printf("Statup v%v (%v)\n", VERSION, COMMIT)
		} else {
			fmt.Printf("Statup v%v\n", VERSION)
		}
		return errors.New("end")
	case "assets":
		err := source.CreateAllAssets(dir)
		if err != nil {
			return err
		} else {
			return errors.New("end")
		}
	case "sass":
		err := source.CompileSASS(dir)
		if err == nil {
			return errors.New("end")
		}
		return err
	case "update":
		gitCurrent, err := checkGithubUpdates()
		if err != nil {
			return nil
		}
		fmt.Printf("Statup Version: v%v\nLatest Version: %v\n", VERSION, gitCurrent.TagName)
		if VERSION != gitCurrent.TagName[1:] {
			fmt.Printf("You don't have the latest version v%v!\nDownload the latest release at: https://github.com/hunterlong/statup\n", gitCurrent.TagName[1:])
		} else {
			fmt.Printf("You have the latest version of Statup!\n")
		}
		if err == nil {
			return errors.New("end")
		}
		return nil
	case "test":
		cmd := args[1]
		switch cmd {
		case "plugins":
			plugin.LoadPlugins()
		}
		return errors.New("end")
	case "export":
		var err error
		fmt.Printf("Statup v%v Exporting Static 'index.html' page...\n", VERSION)
		core.Configs, err = core.LoadConfigFile(dir)
		if err != nil {
			utils.Log(4, "config.yml file not found")
			return err
		}
		indexSource := core.ExportIndexHTML()
		err = utils.SaveFile("./index.html", []byte(indexSource))
		if err != nil {
			utils.Log(4, err)
			return err
		}
		utils.Log(1, "Exported Statup index page: 'index.html'")
	case "help":
		HelpEcho()
		return errors.New("end")
	case "run":
		utils.Log(1, "Running 1 time and saving to database...")
		RunOnce()
		fmt.Println("Check is complete.")
		return errors.New("end")
	case "env":
		fmt.Println("Statup Environment Variable")
		envs, err := godotenv.Read(".env")
		if err != nil {
			utils.Log(4, "No .env file found in current directory.")
			return err
		}
		for k, e := range envs {
			fmt.Printf("%v=%v\n", k, e)
		}
	default:
		return nil
	}
	return errors.New("end")
}

// RunOnce will initialize the Statup application and check each service 1 time, will not run HTTP server
func RunOnce() {
	var err error
	core.Configs, err = core.LoadConfigFile(utils.Directory)
	if err != nil {
		utils.Log(4, "config.yml file not found")
	}
	err = core.Configs.Connect(false, utils.Directory)
	if err != nil {
		utils.Log(4, err)
	}
	core.CoreApp, err = core.SelectCore()
	if err != nil {
		fmt.Println("Core database was not found, Statup is not setup yet.")
	}
	_, err = core.CoreApp.SelectAllServices(true)
	if err != nil {
		utils.Log(4, err)
	}
	for _, out := range core.CoreApp.Services {
		service := out.Select()
		out.Check(true)
		fmt.Printf("    Service %v | URL: %v | Latency: %0.0fms | Online: %v\n", service.Name, service.Domain, (service.Latency * 1000), service.Online)
	}
}

// HelpEcho prints out available commands and flags for Statup
func HelpEcho() {
	fmt.Printf("Statup v%v - Statup.io\n", VERSION)
	fmt.Printf("A simple Application Status Monitor that is opensource and lightweight.\n")
	fmt.Printf("Commands:\n")
	fmt.Println("     statup                    - Main command to run Statup server")
	fmt.Println("     statup version            - Returns the current version of Statup")
	fmt.Println("     statup run                - Check all services 1 time and then quit")
	fmt.Println("     statup test plugins       - Test all plugins for required information")
	fmt.Println("     statup assets             - Dump all assets used locally to be edited.")
	fmt.Println("     statup sass               - Compile .scss files into the css directory")
	fmt.Println("     statup env                - Show all environment variables being used for Statup")
	fmt.Println("     statup export             - Exports the index page as a static HTML for pushing")
	fmt.Println("     statup update             - Attempts to update to the latest version")
	fmt.Println("     statup help               - Shows the user basic information about Statup")
	fmt.Printf("Flags:\n")
	fmt.Println("     -ip 127.0.0.1             - Run HTTP server on specific IP address (default: localhost)")
	fmt.Println("     -port 8080                - Run HTTP server on Port (default: 8080)")
	fmt.Println("Give Statup a Star at https://github.com/hunterlong/statup")
}

func checkGithubUpdates() (githubResponse, error) {
	var gitResp githubResponse
	response, err := http.Get("https://api.github.com/repos/hunterlong/statup/releases/latest")
	if err != nil {
		return githubResponse{}, err
	}
	defer response.Body.Close()
	contents, err := ioutil.ReadAll(response.Body)
	if err != nil {
		return githubResponse{}, err
	}
	err = json.Unmarshal(contents, &gitResp)
	return gitResp, err
}

type githubResponse struct {
	URL             string      `json:"url"`
	AssetsURL       string      `json:"assets_url"`
	UploadURL       string      `json:"upload_url"`
	HTMLURL         string      `json:"html_url"`
	ID              int         `json:"id"`
	NodeID          string      `json:"node_id"`
	TagName         string      `json:"tag_name"`
	TargetCommitish string      `json:"target_commitish"`
	Name            string      `json:"name"`
	Draft           bool        `json:"draft"`
	Author          gitAuthor   `json:"author"`
	Prerelease      bool        `json:"prerelease"`
	CreatedAt       time.Time   `json:"created_at"`
	PublishedAt     time.Time   `json:"published_at"`
	Assets          []gitAssets `json:"assets"`
	TarballURL      string      `json:"tarball_url"`
	ZipballURL      string      `json:"zipball_url"`
	Body            string      `json:"body"`
}

type gitAuthor struct {
	Login             string `json:"login"`
	ID                int    `json:"id"`
	NodeID            string `json:"node_id"`
	AvatarURL         string `json:"avatar_url"`
	GravatarID        string `json:"gravatar_id"`
	URL               string `json:"url"`
	HTMLURL           string `json:"html_url"`
	FollowersURL      string `json:"followers_url"`
	FollowingURL      string `json:"following_url"`
	GistsURL          string `json:"gists_url"`
	StarredURL        string `json:"starred_url"`
	SubscriptionsURL  string `json:"subscriptions_url"`
	OrganizationsURL  string `json:"organizations_url"`
	ReposURL          string `json:"repos_url"`
	EventsURL         string `json:"events_url"`
	ReceivedEventsURL string `json:"received_events_url"`
	Type              string `json:"type"`
	SiteAdmin         bool   `json:"site_admin"`
}

type gitAssets struct {
	URL                string      `json:"url"`
	ID                 int         `json:"id"`
	NodeID             string      `json:"node_id"`
	Name               string      `json:"name"`
	Label              string      `json:"label"`
	Uploader           gitUploader `json:"uploader"`
	ContentType        string      `json:"content_type"`
	State              string      `json:"state"`
	Size               int         `json:"size"`
	DownloadCount      int         `json:"download_count"`
	CreatedAt          time.Time   `json:"created_at"`
	UpdatedAt          time.Time   `json:"updated_at"`
	BrowserDownloadURL string      `json:"browser_download_url"`
}

type gitUploader struct {
	Login             string `json:"login"`
	ID                int    `json:"id"`
	NodeID            string `json:"node_id"`
	AvatarURL         string `json:"avatar_url"`
	GravatarID        string `json:"gravatar_id"`
	URL               string `json:"url"`
	HTMLURL           string `json:"html_url"`
	FollowersURL      string `json:"followers_url"`
	FollowingURL      string `json:"following_url"`
	GistsURL          string `json:"gists_url"`
	StarredURL        string `json:"starred_url"`
	SubscriptionsURL  string `json:"subscriptions_url"`
	OrganizationsURL  string `json:"organizations_url"`
	ReposURL          string `json:"repos_url"`
	EventsURL         string `json:"events_url"`
	ReceivedEventsURL string `json:"received_events_url"`
	Type              string `json:"type"`
	SiteAdmin         bool   `json:"site_admin"`
}