package config

import (
	"fmt"
	"gitea.com/jolheiser/beaver"
	"github.com/BurntSushi/toml"
	"github.com/mitchellh/go-homedir"
	"os"
	"path"
	"strings"
)

var (
	configPath string
	cfg        *config

	// Config items

	GPMURL   string
	Packages []Package
)

type config struct {
	GPMURL   string    `toml:"gpm-url"`
	Packages []Package `toml:"package"`
}

type Package struct {
	Name string `toml:"name"`
	URL  string `toml:"url"`
}

// Load on init so that CLI contexts are correctly populated
func init() {
	home, err := homedir.Dir()
	if err != nil {
		beaver.Fatalf("could not locate home directory: %v", err)
	}
	configPath = fmt.Sprintf("%s/.gpm/config.toml", home)

	if _, err := os.Stat(configPath); os.IsNotExist(err) {
		if err := os.MkdirAll(path.Dir(configPath), os.ModePerm); err != nil {
			beaver.Fatalf("could not create Sip home: %v", err)
		}

		if _, err := os.Create(configPath); err != nil {
			beaver.Fatalf("could not create Sip config: %v", err)
		}
	}

	if _, err := toml.DecodeFile(configPath, &cfg); err != nil {
		beaver.Fatalf("could not decode Sip config: %v", err)
	}

	dupe := make(map[string]bool)
	for _, pkg := range cfg.Packages {
		name := strings.ToLower(pkg.Name)
		if ok := dupe[name]; ok {
			beaver.Fatalf("duplicate package for %s", pkg.Name)
		}
		dupe[name] = true
	}

	GPMURL = cfg.GPMURL
	Packages = cfg.Packages
}

func Save() error {
	cfg.GPMURL = GPMURL
	cfg.Packages = Packages

	fi, err := os.Create(configPath)
	if err != nil {
		return err
	}
	defer fi.Close()

	if err := toml.NewEncoder(fi).Encode(cfg); err != nil {
		return err
	}

	return nil
}

func PackageMap() map[string]string {
	pkgs := make(map[string]string)
	for _, pkg := range Packages {
		pkgs[pkg.Name] = pkg.URL
	}
	return pkgs
}