import { defineMessages } from '../composables/i18n'
import type { KeyBindingDevice } from './keybinding'

/** Structurally identical to the i18n `MessageDescriptor`, without the dependency. */
export interface CatalogMessage {
	id: string
	defaultMessage: string
}

export interface KeybindingCatalogItem {
	device: KeyBindingDevice
	code: string
	/** Set for inputs whose name has to be translated; key caps read the same everywhere. */
	label?: CatalogMessage
}

export interface KeybindingCatalogGroup {
	id: string
	label: CatalogMessage
	items: KeybindingCatalogItem[]
}

export interface KeybindingCatalogDevice {
	id: KeyBindingDevice
	label: CatalogMessage
	groups: KeybindingCatalogGroup[]
}

const messages = defineMessages({
	mouseLeft: { id: 'ui.keybinding-modal.mouse-left', defaultMessage: 'Left click' },
	mouseMiddle: { id: 'ui.keybinding-modal.mouse-middle', defaultMessage: 'Middle click' },
	mouseRight: { id: 'ui.keybinding-modal.mouse-right', defaultMessage: 'Right click' },
	mouseBack: { id: 'ui.keybinding-modal.mouse-back', defaultMessage: 'Back button' },
	mouseForward: { id: 'ui.keybinding-modal.mouse-forward', defaultMessage: 'Forward button' },
	wheelUp: { id: 'ui.keybinding-modal.wheel-up', defaultMessage: 'Wheel up' },
	wheelDown: { id: 'ui.keybinding-modal.wheel-down', defaultMessage: 'Wheel down' },
	deviceKeyboard: { id: 'ui.keybinding-modal.device-keyboard', defaultMessage: 'Keyboard' },
	deviceMouse: { id: 'ui.keybinding-modal.device-mouse', defaultMessage: 'Mouse' },
	groupLetters: { id: 'ui.keybinding-modal.group-letters', defaultMessage: 'Letters' },
	groupDigits: { id: 'ui.keybinding-modal.group-digits', defaultMessage: 'Digits' },
	groupFunction: { id: 'ui.keybinding-modal.group-function', defaultMessage: 'Function keys' },
	groupNavigation: {
		id: 'ui.keybinding-modal.group-navigation',
		defaultMessage: 'Navigation keys',
	},
	groupPunctuation: {
		id: 'ui.keybinding-modal.group-punctuation',
		defaultMessage: 'Punctuation',
	},
	groupMouseButtons: {
		id: 'ui.keybinding-modal.group-mouse-buttons',
		defaultMessage: 'Buttons',
	},
	groupWheel: { id: 'ui.keybinding-modal.group-wheel', defaultMessage: 'Wheel' },
})

/**
 * Names for the pointer inputs. Shared by the picker tree and by the chips that
 * render a saved combination, so both read the same way.
 */
export const MOUSE_CODE_MESSAGES: Record<string, CatalogMessage> = {
	Mouse0: messages.mouseLeft,
	Mouse1: messages.mouseMiddle,
	Mouse2: messages.mouseRight,
	Mouse3: messages.mouseBack,
	Mouse4: messages.mouseForward,
	WheelUp: messages.wheelUp,
	WheelDown: messages.wheelDown,
}

const LETTER_CODES: KeybindingCatalogItem[] = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
	.split('')
	.map((letter) => ({ device: 'keyboard', code: `Key${letter}` }))

const DIGIT_CODES: KeybindingCatalogItem[] = '0123456789'
	.split('')
	.map((digit) => ({ device: 'keyboard', code: `Digit${digit}` }))

const FUNCTION_CODES: KeybindingCatalogItem[] = Array.from({ length: 12 }, (_, index) => ({
	device: 'keyboard',
	code: `F${index + 1}`,
}))

const NAVIGATION_CODES: KeybindingCatalogItem[] = [
	'Home',
	'End',
	'PageUp',
	'PageDown',
	'Insert',
	'Delete',
	'ArrowUp',
	'ArrowDown',
	'ArrowLeft',
	'ArrowRight',
].map((code) => ({ device: 'keyboard', code }))

const PUNCTUATION_CODES: KeybindingCatalogItem[] = [
	'Comma',
	'Period',
	'Slash',
	'Semicolon',
	'Quote',
	'BracketLeft',
	'BracketRight',
	'Backslash',
	'Minus',
	'Equal',
	'Backquote',
	'Space',
].map((code) => ({ device: 'keyboard', code }))

const MOUSE_ITEMS: KeybindingCatalogItem[] = Object.entries(MOUSE_CODE_MESSAGES).map(
	([code, label]) => ({ device: 'mouse', code, label }),
)

/**
 * Everything a shortcut can be attached to, grouped for the picker. Inputs that
 * cannot be reproduced by pressing them - mouse buttons, the wheel, and any
 * combination of those with the keyboard - are only reachable from here.
 */
export const KEYBINDING_CATALOG: KeybindingCatalogDevice[] = [
	{
		id: 'keyboard',
		label: messages.deviceKeyboard,
		groups: [
			{ id: 'letters', label: messages.groupLetters, items: LETTER_CODES },
			{ id: 'digits', label: messages.groupDigits, items: DIGIT_CODES },
			{ id: 'function', label: messages.groupFunction, items: FUNCTION_CODES },
			{ id: 'navigation', label: messages.groupNavigation, items: NAVIGATION_CODES },
			{ id: 'punctuation', label: messages.groupPunctuation, items: PUNCTUATION_CODES },
		],
	},
	{
		id: 'mouse',
		label: messages.deviceMouse,
		groups: [
			{
				id: 'buttons',
				label: messages.groupMouseButtons,
				items: MOUSE_ITEMS.filter((item) => item.code.startsWith('Mouse')),
			},
			{
				id: 'wheel',
				label: messages.groupWheel,
				items: MOUSE_ITEMS.filter((item) => item.code.startsWith('Wheel')),
			},
		],
	},
]