package growsync

import (
	"context"
	"flag"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"time"

	"golang.org/x/xerrors"
)

type editCmd struct{}

const layout string = "2006/01/02"

func (pc *editCmd) name() string {
	return "edit"
}

func (pc *editCmd) description() string {
	return "edit from growi web app"
}

func (pc *editCmd) run(ctx context.Context, argv []string, config *growiConfig, stdWriter io.Writer, errorWriter io.Writer) error {
	fs := flag.NewFlagSet("growsync edit", flag.ContinueOnError)
	fs.SetOutput(errorWriter)

	if err := fs.Parse(argv); err != nil {
		return xerrors.Errorf("[error] failed parse argv %+w", err)
	}

	var growiPATH string

	if fs.NArg() < 1 {
		growiPATH = createNewDailyMarkdownPATH(config.DailyPATH)
	} else {
		growiPATH = convertGrowiSystemPath(fs.Arg(0))
	}

	localFilePATH := filepath.Join(config.LocalRoot, growiPATH+".md")

	var beforeTime time.Time

	alreadyExistsFile := existsFile(localFilePATH)

	if alreadyExistsFile {
		info, err := os.Stat(localFilePATH)
		if err != nil {
			return xerrors.Errorf("[error] failed file stat %s %+w", localFilePATH, err)
		}
		beforeTime = info.ModTime()
	}

	client, err := NewGrowiClient(config.URL, config.TOKEN)
	if err != nil {
		return xerrors.Errorf("[error] failed growi client %+w", err)
	}

	err = doEdit(localFilePATH)
	if err != nil {
		return xerrors.Errorf("failed edit mardkwodn file %+w", err)
	}

	if alreadyExistsFile {
		info, err := os.Stat(localFilePATH)
		if err != nil {
			return xerrors.Errorf("[error] failed file stat %s %+w", localFilePATH, err)
		}

		if info.ModTime() == beforeTime {
			fmt.Printf("[info] %s not update\n", growiPATH)
			return nil
		}
	}

	return client.UpdatePage(growiPATH, localFilePATH)
}

func createNewDailyMarkdownPATH(dailyPATH string) string {
	now := time.Now()
	return filepath.Join(dailyPATH, now.Format(layout))
}