// 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) screen_boundary(forward bool) string {
	if r.suppressScreenBoundary {
		return ""
	}
	if forward {
		r.result.Cue = presentation.Bottom
		return i18n.T("end of screen")
	}
	r.result.Cue = presentation.Top
	return i18n.T("start of screen")
}

func (r *Review) line_break() {
	if !r.suppressLineBreak {
		r.result.After.Text, r.result.After.Cue = i18n.T("line break"), presentation.LineEnd
	}
}

func (r *Review) move_character(forward bool) string {
	if forward {
		if r.x == r.screen.Cols-1 {
			if r.y == r.screen.Rows-1 {
				return r.screen_boundary(true)
			}
			r.x, r.y = 0, r.y+1
			r.line_break()
		} else {
			r.x++
		}
	} else {
		if r.x == 0 {
			if r.y == 0 {
				return r.screen_boundary(false)
			}
			r.x, r.y = r.screen.Cols-1, r.y-1
			r.line_break()
		} else {
			r.x--
		}
	}
	return r.currentCharacter()
}