package archetype

import (
	"errors"
	"io/ioutil"
	"os"
	"path/filepath"
	"strings"
)

type EurekaAdapter struct {
	Root   string
	Config map[string]interface{}
}

func (self *EurekaAdapter) Init(cfg *Config) {
	fileInfo, err := os.Stat(cfg.Root)
	if os.IsNotExist(err) {
		panic("SSG content root does not exist! Ensure your configs are correct or create it!")
	} else if !fileInfo.IsDir() {
		panic("SSG content root is not a directory!")
	}

	self.Root = cfg.Root

	// TODO: read config.h and build self.Config
}

func (self *EurekaAdapter) Name() string {
	return "eureka"
}

func (self *EurekaAdapter) EditableSlugs() bool {
	return false
}

func (self *EurekaAdapter) BuildOptions() []string {
	return []string{"twtxt"}
}

func (self *EurekaAdapter) GetConfig(key string) (interface{}, error) {
	return nil, nil
}

func (self *EurekaAdapter) SetConfig(key string, value interface{}) error {
	return nil
}

func (self *EurekaAdapter) ListPages() map[string]string {
	files, err := ioutil.ReadDir(
		filepath.Join(self.Root, "inc"))

	if err != nil {
		panic(err.Error())
	}

	pages := map[string]string{}
	for _, file := range files {
		filename := file.Name()
		if strings.HasSuffix(filename, ".htm") {
			pages[filename] = strings.Replace(
				strings.TrimSuffix(filename, ".htm"), "_", " ", -1)
		}
	}
	return pages
}

func (self *EurekaAdapter) GetPage(filename string) (Page, error) {
	fullPath := filepath.Join(self.Root, "inc", filename)
	f, err := os.ReadFile(fullPath)

	if err != nil {
		return Page{}, err
	}

	if !strings.HasSuffix(filename, ".htm") {
		return Page{}, errors.New("Page file extension is not '.htm'")
	}

	title := strings.Replace(
		strings.TrimSuffix(filename, ".htm"), "_", " ", -1)
	fileInfo, _ := os.Stat(fullPath)
	content := string(f[:])

	return Page{
		Title:   title,
		Slug:    filename,
		Content: content,
		Edited:  fileInfo.ModTime(),
	}, nil
}

func (self *EurekaAdapter) FormatPage(raw string) string {
	// TODO: implement Eureka formatter to show preview
	return raw
}

func (self *EurekaAdapter) FormattingHelp() string {
	// TODO: show Eureka formatting guide
	return "help!"
}

func (self *EurekaAdapter) CreatePage(slug, title, content string) error {
	// eureka makes titles from slugs, so we don't use title here
	f, err := os.Create(filepath.Join(self.Root, "inc", newSlug))
	if err != nil {
		return err
	}
	defer f.Close()
	f.WriteString(content)
	return nil
}

func (self *EurekaAdapter) SavePage(oldSlug, newSlug, title, content string) error {
	// eureka makes titles from slugs, so we don't use title here
	f, err := os.Create(filepath.Join(self.Root, "inc", newSlug))
	if err != nil {
		return err
	}
	defer f.Close()

	if oldSlug != newSlug {
		// TODO: delete old html as well
		os.Remove(filepath.Join(self.Root, "inc", oldSlug))
	}

	f.WriteString(content)
	return nil
}

func (self *EurekaAdapter) DeletePage(slug string) error {
	// TODO: delete old html as well
	return os.Remove(filepath.Join(self.Root, "inc", slug))
}

func (self *EurekaAdapter) Build(buildOptions map[string]string) (bool, string) {
	// TODO: shell out to build.sh with buildOptions, record exit status and output
	return true, "Build successful"
}