package defaults

import (
	"io/ioutil"
	"strings"

	"github.com/goreleaser/releaser/context"
)

var defaultFiles = []string{"LICENCE", "LICENSE", "README", "CHANGELOG"}

// Pipe for brew deployment
type Pipe struct{}

// Name of the pipe
func (Pipe) Name() string {
	return "Defaults"
}

// Run the pipe
func (Pipe) Run(ctx *context.Context) (err error) {
	if ctx.Config.Build.Main == "" {
		ctx.Config.Build.Main = "main.go"
	}
	if len(ctx.Config.Build.Oses) == 0 {
		ctx.Config.Build.Oses = []string{"linux", "darwin"}
	}
	if len(ctx.Config.Build.Arches) == 0 {
		ctx.Config.Build.Arches = []string{"amd64", "386"}
	}
	if ctx.Config.Build.Ldflags == "" {
		ctx.Config.Build.Ldflags = "-s -w"
	}
	if ctx.Config.Archive.NameTemplate == "" {
		ctx.Config.Archive.NameTemplate = "{{.BinaryName}}_{{.Os}}_{{.Arch}}"
	}
	if ctx.Config.Archive.Format == "" {
		ctx.Config.Archive.Format = "tar.gz"
	}
	if len(ctx.Config.Archive.Replacements) == 0 {
		ctx.Config.Archive.Replacements = map[string]string{
			"darwin":  "Darwin",
			"linux":   "Linux",
			"freebsd": "FreeBSD",
			"openbsd": "OpenBSD",
			"netbsd":  "NetBSD",
			"windows": "Windows",
			"386":     "i386",
			"amd64":   "x86_64",
		}
	}
	if len(ctx.Config.Files) != 0 {
		return
	}
	files, err := findFiles(".")
	if err != nil {
		return
	}
	ctx.Config.Files = files
	return
}

func findFiles(path string) (files []string, err error) {
	all, err := ioutil.ReadDir(path)
	if err != nil {
		return
	}
	for _, file := range all {
		for _, accepted := range defaultFiles {
			if strings.Contains(file.Name(), accepted) {
				files = append(files, file.Name())
			}
		}
	}
	return
}