package app

import (
	"os"

	"gitlab.com/revalus/grm/commands"
	"gitlab.com/revalus/grm/config"
)

const (
	APP_NAME        = "Git repository manager"
	APP_DESCRIPTION = "Manage your repository with simple app"
	VERSION         = "0.2.0"
)

type GitRepositoryManager struct {
	cliArguments  config.CliArguments
	configuration config.Configuration
	console       ConsoleOutput
}

func (g *GitRepositoryManager) Parse(args []string) {
	co := ConsoleOutput{}

	checkCriticalError := func(err error) {
		if err != nil {
			co.ErrorfMsg("%v", err.Error())
			os.Exit(2)
		}
	}

	arguments, err := config.ParseCliArguments(APP_NAME, APP_DESCRIPTION, args)
	checkCriticalError(err)

	configFileContent, err := getFileContent(arguments.ConfigurationFile)
	checkCriticalError(err)

	fileExcension, err := getFileExcension(arguments.ConfigurationFile)
	checkCriticalError(err)

	configuration, err := config.GetRepositoryConfig(configFileContent, fileExcension)
	checkCriticalError(err)
	co.Color = arguments.Color

	g.console = co
	g.cliArguments = arguments
	g.configuration = configuration
}

func (g *GitRepositoryManager) Run() {
	if g.cliArguments.Sync {
		g.console.InfoFMsg("Synchronizing repositories")
		println()
		sync := commands.NewSynchronizer(g.configuration.Workspace)
		g.runCommand(sync)
		println()
		g.console.InfoFMsg("All repositories are synced")
	}

	if g.cliArguments.Status {
		status := commands.NewStatusChecker(g.configuration.Workspace)
		g.runCommand(status)
	}

	if g.cliArguments.Version {
		g.console.InfoFMsg("Current version: %v", VERSION)
	}
}

func (g GitRepositoryManager) describeStatus(status commands.CommandStatus) {
	if status.Error {
		g.console.ErrorStatusF("Repository \"%v\": an error occurred: %v", status.Name, status.Message)
		return
	}

	if status.Changed {
		g.console.ChangedStatusF("Repository \"%v\": %v", status.Name, status.Message)
	} else {
		g.console.UnchangedStatusF("Repository \"%v\": %v", status.Name, status.Message)
	}
}

func (g *GitRepositoryManager) runCommand(cmd commands.Command) {
	statusChan := make(chan commands.CommandStatus)

	for _, repo := range g.configuration.Repositories {
		go cmd.Command(repo, statusChan)
	}

	for range g.configuration.Repositories {
		g.describeStatus(<-statusChan)
	}
}