package helpers

import (
	"path/filepath"
)

type IFilesHelper interface {
	EditFile(filename string) error
	EditFileAtLine(filename string, lineNumber int) error
	OpenFile(filename string) error
}

type FilesHelper struct {
	c *HelperCommon
}

func NewFilesHelper(c *HelperCommon) *FilesHelper {
	return &FilesHelper{
		c: c,
	}
}

var _ IFilesHelper = &FilesHelper{}

func (self *FilesHelper) EditFile(filename string) error {
	absPath, err := filepath.Abs(filename)
	if err != nil {
		return err
	}
	cmdStr, suspend := self.c.Git().File.GetEditCmdStr(absPath)
	return self.callEditor(cmdStr, suspend)
}

func (self *FilesHelper) EditFileAtLine(filename string, lineNumber int) error {
	absPath, err := filepath.Abs(filename)
	if err != nil {
		return err
	}
	cmdStr, suspend := self.c.Git().File.GetEditAtLineCmdStr(absPath, lineNumber)
	return self.callEditor(cmdStr, suspend)
}

func (self *FilesHelper) EditFileAtLineAndWait(filename string, lineNumber int) error {
	absPath, err := filepath.Abs(filename)
	if err != nil {
		return err
	}
	cmdStr := self.c.Git().File.GetEditAtLineAndWaitCmdStr(absPath, lineNumber)

	// Always suspend, regardless of the value of the suspend config,
	// since we want to prevent interacting with the UI until the editor
	// returns, even if the editor doesn't use the terminal
	return self.callEditor(cmdStr, true)
}

func (self *FilesHelper) OpenDirInEditor(path string) error {
	absPath, err := filepath.Abs(path)
	if err != nil {
		return err
	}
	cmdStr, suspend := self.c.Git().File.GetOpenDirInEditorCmdStr(absPath)

	return self.callEditor(cmdStr, suspend)
}

func (self *FilesHelper) callEditor(cmdStr string, suspend bool) error {
	if suspend {
		return self.c.RunSubprocessAndRefresh(
			self.c.OS().Cmd.NewShell(cmdStr),
		)
	}

	return self.c.OS().Cmd.NewShell(cmdStr).Run()
}

func (self *FilesHelper) OpenFile(filename string) error {
	absPath, err := filepath.Abs(filename)
	if err != nil {
		return err
	}
	self.c.LogAction(self.c.Tr.Actions.OpenFile)
	if err := self.c.OS().OpenFile(absPath); err != nil {
		return self.c.Error(err)
	}
	return nil
}