// Fenrir console screen reader.
// Copyright (c) 2026 Storm Dragon
// SPDX-License-Identifier: GPL-3.0-or-later
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
// more details.
//
// You should have received a copy of the GNU General Public License along with
// this program. If not, see <https://www.gnu.org/licenses/gpl-3.0.html>.

package input

import (
	"git.stormux.org/storm/fenrir/internal/interaction"
	"time"
)

// Capture changes ownership without forgetting physical keys. Keys held on
// entry cannot navigate the UI; keys held on exit cannot repeat into a terminal.
// Backends release previously forwarded keys before enabling capture.
func (r *Router) Capture(enabled bool) {
	r.lastPress = time.Time{}
	r.captured = enabled
	r.capsUsed = true
	r.passArmed, r.passing = false, false
	for _, held := range r.keys {
		for code, state := range held {
			state.forwarded, state.ui = false, false
			state.commandID = ""
			held[code] = state
		}
	}
}

func (r *Router) Captured() bool { return r.captured }

func (r *Router) ui_key(code uint16) Decision {
	key := &interaction.Key{
		Shift: r.down(KeyShift) || r.down(KeyRightShift),
		Ctrl:  r.down(KeyCtrl) || r.down(KeyRightCtrl),
		Alt:   r.down(KeyAlt), // Right Alt is text input (AltGr).
		AltGr: r.down(KeyRightAlt),
	}
	switch code {
	case KeyEsc:
		key.Name = "escape"
	case KeyTab:
		key.Name = "tab"
	case KeyEnter, KeyKPEnter:
		key.Name = "enter"
	case KeySpace:
		key.Name = "space"
		key.Text = " "
	case KeyUp:
		key.Name = "up"
	case KeyDown:
		key.Name = "down"
	case KeyLeft:
		key.Name = "left"
	case KeyRight:
		key.Name = "right"
	case KeyHome:
		key.Name = "home"
	case KeyEnd:
		key.Name = "end"
	case KeyBackspace:
		key.Name = "backspace"
	case KeyDelete:
		key.Name = "delete"
	}
	return Decision{UI: key, Interrupt: true}
}