package main

import (
	"strings"

	"github.com/gdamore/tcell/v2"
	"github.com/rivo/tview"
)

// 1,000 most common English words.
const wordList = "a/cl,c."

func main() {
	words := strings.Split(wordList, ",")
	app := tview.NewApplication()
	inputField := tview.NewInputField().
		SetLabel("Enter a word: ").
		SetFieldWidth(30).
		SetDoneFunc(func(key tcell.Key) {
			app.Stop()
		})
	inputField.SetAutocompleteFunc(func(currentText string) (entries []string) {
		if len(currentText) == 0 {
			return
		}
		for _, word := range words {
			for _, part := range strings.Split(word, "/") {
				if strings.HasPrefix(strings.ToLower(part), strings.ToLower(currentText)) {
					entries = append(entries, word)
					break
				}
			}
		}
		if len(entries) == 0 {
			entries = nil
		}
		return
	})
	inputField.SetAutocompletedFunc(func(text string, index, source int) bool {
		if source != tview.AutocompletedNavigate {
			inputField.SetText(text)
		}
		return source == tview.AutocompletedEnter || source == tview.AutocompletedClick
	})
	if err := app.EnableMouse(true).SetRoot(inputField, true).Run(); err != nil {
		panic(err)
	}
}