package cmd

import (
	"fmt"
	"log"
	"path/filepath"

	"github.com/spf13/afero"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

func init() {
	RootCmd.AddCommand(linkCommand)
}

var linkCommand = &cobra.Command{
	Use:   "link",
	Run:   runLinkCommand,
	Short: "generate symlinks according to config",
	Long:  "runs through all configs in the dotctl config file and links them to configured symlinks", // TODO add longer description here
}

func runLinkCommand(cmd *cobra.Command, args []string) {
	fs := FileSystem
	fmt.Println("Symlinking dotfiles...")
	dotfileRoot := viper.Get("dotfile-path").(string)

	links := viper.GetStringMapString("links")

	for configName, configPath := range links {
		if configName == ".git" || configName == "dotctl" {
			continue
		}
		dotPath := filepath.Join(dotfileRoot, configName)

		if configPath == "" {
			fmt.Fprintf(cmd.OutOrStdout(), "Warning: could not find config for %s\n", configName)
		}

		// destination needs to be removed before symlink
		if DryRun {
			log.Printf("Existing directory %s will be removed\n", configPath)

		} else {
			fs.RemoveAll(configPath)
		}

		testing := viper.Get("testing")

		if DryRun {
			log.Printf("Will link %s -> %s\n", configPath, dotPath)
		} else {
			if testing == true {
				fmt.Fprintf(cmd.OutOrStdout(), "%s,%s", configPath, dotPath)
			} else {
				linkPaths(dotPath, configPath)
			}
		}
	}
}

func linkPaths(dotPath, configPath string) {
	err := afero.OsFs.SymlinkIfPossible(afero.OsFs{}, dotPath, configPath)
	if err != nil {
		log.Fatalf("Cannot symlink %s: %s\n", configPath, err.Error())
	} else {
		fmt.Printf("%s linked to %s\n", configPath, dotPath)
	}
}