#!/usr/bin/env bash
# Shared presentation helpers. No Proxmox operations belong in this file.

TAPM_UI_INIT() {
	TAPM_UI_RESET='' TAPM_UI_BOLD='' TAPM_UI_MUTED='' TAPM_UI_ACCENT=''
	TAPM_UI_SUCCESS='' TAPM_UI_WARNING='' TAPM_UI_ERROR='' TAPM_UI_SELECTED=''
	if [[ -t 1 && "${TERM:-dumb}" != dumb && -z "${NO_COLOR+x}" ]]; then
		TAPM_UI_RESET=$'\e[0m' TAPM_UI_BOLD=$'\e[1m' TAPM_UI_MUTED=$'\e[90m'
		TAPM_UI_ACCENT=$'\e[96m' TAPM_UI_SUCCESS=$'\e[32m'
		TAPM_UI_WARNING=$'\e[33m' TAPM_UI_ERROR=$'\e[31m'
		TAPM_UI_SELECTED=$'\e[1;36m'
	fi
	TAPM_UI_WIDTH="${COLUMNS:-80}"
	if [[ -t 1 && "${TERM:-dumb}" != dumb ]]; then
		TAPM_UI_WIDTH="$(tput cols 2>/dev/null)" || TAPM_UI_WIDTH="${COLUMNS:-80}"
	fi
	[[ "$TAPM_UI_WIDTH" =~ ^[0-9]+$ ]] || TAPM_UI_WIDTH=80
	(( TAPM_UI_WIDTH > 75 )) && TAPM_UI_WIDTH=75
	(( TAPM_UI_WIDTH < 20 )) && TAPM_UI_WIDTH=20
	return 0
}

TAPM_UI_PLAIN() {
	# Existing menus embed ANSI colors in a few labels; styling is centralized here.
	printf '%s' "$1" | sed -E $'s/\033\\[[0-9;]*[[:alpha:]]//g'
}

TAPM_UI_TEXT() {
	local style="$1" text="$2" line
	while IFS= read -r line; do
		printf ' %s%s%s\n' "$style" "$line" "$TAPM_UI_RESET"
	done < <(printf '%s\n' "$text" | fold -s -w "$((TAPM_UI_WIDTH - 2))")
}

TAPM_UI_RULE() {
	local rule
	printf -v rule '%*s' "$((TAPM_UI_WIDTH - 2))" ''
	TAPM_UI_TEXT "$TAPM_UI_MUTED" "${rule// /-}"
}

TAPM_UI_SHORTCUTS() {
	local key description length used=0 gap=''
	printf ' '
	while (( $# >= 2 )); do
		key="$1" description="$2"
		shift 2
		length=$((${#key} + 1 + ${#description}))
		if (( used > 0 && used + 3 + length > TAPM_UI_WIDTH - 2 )); then
			printf '\n '
			used=0 gap=''
		fi
		printf '%s%s%s%s %s' "$gap" "$TAPM_UI_ACCENT" "$key" "$TAPM_UI_RESET" "$description"
		used=$((used + ${#gap} + length))
		gap='   '
	done
	printf '\n'
}

TAPM_UI_TASK() {
	TAPM_UI_TEXT "$TAPM_UI_ACCENT" "Starting: $(TAPM_UI_PLAIN "$1")"
	TAPM_UI_RULE
	printf '\n'
}

TAPM_UI_MENU_META() {
	local title="$1" value="$2"
	TAPM_UI_KIND=task
	TAPM_UI_HINT=''
	case "$title:$value" in
		'Main Menu:'*|'Host Configuration & Recovery:post_install'|'Storage, ISOs & Backups:virtio'|\
		'Host Configuration & Recovery:services'|'TAPM Management:branches'|\
		'TAPM Host Profile:customize'|'Storage, ISOs & Backups:vzdump'|\
		'TAPM Host Profile:restore'|'Proxmox Backup Settings:restore'|\
		'Monitoring & Agents:notifications'|'Proxmox Notifications:policy')
			TAPM_UI_KIND=submenu ;;
		'Select ISO Storage:'*|'Restore TAPM Host Configuration Backup:'*|\
		'Switch TAPM Git Branch:'*|'Proxmox Backup Settings:'*|\
		'Update Notification Policy:'*)
			TAPM_UI_KIND=choice ;;
		'Customize TAPM Host Profile:'*)
			[[ "$value" == apply ]] || TAPM_UI_KIND=choice ;;
		'TAPM Management:install_update')
			# The update banner is printed after the user confirms installation.
			TAPM_UI_KIND=choice ;;
	esac
	case "$value" in back|quit) TAPM_UI_KIND=navigation ;; esac
	case "$title:$value" in
		'Cluster & High Availability:maintenance')
			TAPM_UI_HINT='This host: eligible guests migrate; local-storage guests shut down gracefully.' ;;
		'Cluster & High Availability:keepalived')
			TAPM_UI_HINT='Deploy or reconfigure Keepalived across cluster hosts.' ;;
		'Storage, ISOs & Backups:iso_nfs')
			TAPM_UI_HINT='Create an LXC NFS server and register shared ISO storage.' ;;
		'Storage, ISOs & Backups:orphan_disks')
			TAPM_UI_HINT='Read-only cluster scan with optional CSV export.' ;;
		'Cluster & High Availability:cpu')
			TAPM_UI_HINT='Analyze migration compatibility; review before applying a CPU model.' ;;
		'Host Configuration & Recovery:services')
			TAPM_UI_HINT='Restart Proxmox management services on this host.' ;;
		'Storage, ISOs & Backups:vzdump')
			TAPM_UI_HINT='Set backup bandwidth and I/O priority on this host.' ;;
		'Proxmox Notifications:policy')
			TAPM_UI_HINT='Choose all updates, Proxmox VE version updates only, or no update alerts.' ;;
		'TAPM Management:install_update')
			TAPM_UI_HINT='Update TAPM on online cluster nodes, or on this standalone host.' ;;
	esac
}

TAPM_UI_MENU_ROW() {
	local number="$1" label="$2" active="$3" marker=' ' style='' suffix=''
	label="$(TAPM_UI_PLAIN "$label")"
	[[ "$TAPM_UI_KIND" == submenu ]] && suffix='  >'
	if (( active )); then
		marker='>' style="$TAPM_UI_SELECTED"
	fi
	TAPM_UI_TEXT "$style" "$marker $number  $label$suffix"
}