#!/usr/bin/env bash
# AUR upgrade detection and application

# List foreign packages (AUR candidates): name version
foreign_packages() {
	pacman -Qm
}

# Compare installed foreign pkgs with AUR; print upgradable: name local -> remote
aur_outdated() {
	local -a names=()
	local -A localver=()
	local name ver
	while read -r name ver; do
		[[ -z $name ]] && continue
		names+=("$name")
		localver[$name]=$ver
	done < <(foreign_packages)

	[[ ${#names[@]} -eq 0 ]] && return 0

	# Batch in chunks of 100
	local i chunk=100
	local -a batch=()
	for ((i = 0; i < ${#names[@]}; i++)); do
		batch+=("${names[$i]}")
		if ((${#batch[@]} == chunk || i == ${#names[@]} - 1)); then
			local json
			json=$(aur_multiinfo_json "${batch[@]}") || {
				warn "Failed to query AUR updates"
				batch=()
				continue
			}
			local line rname rver
			while IFS= read -r line; do
				rname=${line%%|*}
				rver=${line#*|}
				[[ -z $rname ]] && continue
				local lv=${localver[$rname]:-}
				[[ -z $lv ]] && continue
				if [[ $(vercmp_safe "$rver" "$lv") -gt 0 ]]; then
					printf '%s %s -> %s\n' "$rname" "$lv" "$rver"
				fi
			done < <(jq -r '.[] | "\(.Name)|\(.Version)"' <<<"$json")
			batch=()
		fi
	done
}

# Print outdated like pacman -Qu
cmd_query_aur_upgrades() {
	local name old _arrow new
	while read -r name old _arrow new; do
		[[ -z $name ]] && continue
		printf '%s %s -> %s\n' "$name" "$old" "$new"
	done < <(aur_outdated)
	return 0
}

# Upgrade all outdated AUR packages
cmd_upgrade_aur() {
	local -a pkgs=()
	local name old _arrow new
	while read -r name old _arrow new; do
		[[ -z $name ]] && continue
		pkgs+=("$name")
		msg2 "$name ${old} -> ${new}"
	done < <(aur_outdated)

	if [[ ${#pkgs[@]} -eq 0 ]]; then
		msg "No AUR package upgrades are available"
		return 0
	fi
	msg "Upgrading ${#pkgs[@]} AUR package(s)"
	install_aur_packages "${pkgs[@]}"
}

# Full -Syu: refresh + repo upgrade + AUR upgrade
cmd_upgrade_all() {
	local refresh=${1:-0}
	sudoloop_start
	local -a conf=()
	mapfile -t conf < <(pac_noconfirm_args)

	msg "Synchronizing databases and upgrading repository packages..."
	if [[ $refresh -eq 1 ]]; then
		as_root ${MIAUR_PACMAN} -Syu "${conf[@]}" || die "repository upgrade failed"
	else
		as_root ${MIAUR_PACMAN} -Su "${conf[@]}" || die "repository upgrade failed"
	fi

	msg "Checking for AUR updates..."
	cmd_upgrade_aur
	sudoloop_stop
}