// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later

package reader

import (
	"fmt"
	"git.stormux.org/storm/fenrir/internal/screen"
	"git.stormux.org/storm/fenrir/internal/spellcheck"
)

// Spellcheck_word observes the active cursor without moving it or entering review.
func (r *Reader) Spellcheck_word() string { return r.review.Spellcheck_word() }

// Completed_words contains only screen-confirmed typing from the latest Update.
// Raw keys, cursor navigation, deletion and passive output never supply words.
func (r *Reader) Completed_words() []string { return r.completedWords }

func (r *Reader) completed_word(index int, snapshot screen.Snapshot) {
	char := snapshot.Cells[index]
	if !spellcheck.Separator(char) {
		return
	}
	end := index
	for end > 0 && spellcheck.Separator(snapshot.Cells[end-1]) {
		end--
	}
	start := end
	for start > 0 && !spellcheck.Separator(snapshot.Cells[start-1]) {
		start--
	}
	if start == end {
		return
	}
	value := string(snapshot.Cells[start:end])
	word := spellcheck.Word(value)
	if word == "" {
		return
	}
	key := fmt.Sprintf("%d:%d:%s", start, snapshot.Cols, word)
	if key == r.lastCompletedWord {
		return
	}
	r.lastCompletedWord = key
	if len(r.completedWords) < 32 {
		r.completedWords = append(r.completedWords, word)
	}
}