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

package review

import (
	"git.stormux.org/storm/fenrir/internal/i18n"
	"git.stormux.org/storm/fenrir/internal/presentation"
)

func (r *Review) vertical_character(direction int) string {
	nextRow := r.y + direction
	if nextRow < 0 {
		return r.screen_boundary(false)
	}
	if nextRow >= r.screen.Rows {
		return r.screen_boundary(true)
	}
	r.y = nextRow
	// Snapshots retain terminal padding, so a short or blank row need not
	// clamp the column. Table review also retains the selected cell: an
	// absolute column outside it must not read a neighbouring cell instead.
	if r.tableMode {
		cells := r.current_table_cells()
		if r.tableColumn >= len(cells) {
			return i18n.T("no table data")
		}
		cell := cells[r.tableColumn]
		if cell.start == cell.end {
			r.result.Cue = presentation.Blank
			return i18n.T("blank")
		}
		if r.x < cell.start || r.x >= cell.end {
			return i18n.T("no table data")
		}
	}
	return r.currentCharacter()
}