package chglog

import (
	"bytes"
	"fmt"
	"log"
	"os"
)

func Example() {
	gen := NewGenerator(NewLogger(os.Stdout, os.Stderr, false, true),
		&Config{
			Bin:        "git",
			WorkingDir: ".",
			Template:   "CHANGELOG.tpl.md",
			Info: &Info{
				Title:         "CHANGELOG",
				RepositoryURL: "https://github.com/git-chglog/git-chglog",
			},
			Options: &Options{
				CommitFilters: map[string][]string{
					"Type": []string{
						"feat",
						"fix",
					},
				},
				CommitSortBy:      "Scope",
				CommitGroupBy:     "Type",
				CommitGroupSortBy: "Title",
				CommitGroupTitleMaps: map[string]string{
					"feat": "Features",
					"fix":  "Bug Fixes",
				},
				HeaderPattern: "^(\\w*)(?:\\(([\\w\\$\\.\\-\\*\\s]*)\\))?\\:\\s(.*)$",
				HeaderPatternMaps: []string{
					"Type",
					"Scope",
					"Subject",
				},
				IssuePrefix: []string{
					"#",
					"gh-",
				},
				RefActions:   []string{},
				MergePattern: "^Merge pull request #(\\d+) from (.*)$",
				MergePatternMaps: []string{
					"Ref",
					"Source",
				},
				RevertPattern: "^Revert \"([\\s\\S]*)\"$",
				RevertPatternMaps: []string{
					"Header",
				},
				NoteKeywords: []string{
					"BREAKING CHANGE",
				},
			},
		})

	buf := &bytes.Buffer{}
	err := gen.Generate(buf, "")

	if err != nil {
		log.Fatalln(err)
	}

	fmt.Println(buf.String())
}