#!/bin/sh

if [ "${NGX_HTTP}" = 0 ] ; then
	unset NGX_HTTP_V2 NGX_HTTP_V3 NGX_HTTP_PROXY
else
	set -a
	NGX_HTTP_V2=$(gobool_to_int "${NGX_HTTP_V2:-0}" 0)
	NGX_HTTP_V3=$(gobool_to_int "${NGX_HTTP_V3:-0}" 0)
	NGX_HTTP_PROXY=$(gobool_to_int "${NGX_HTTP_PROXY:-1}" 1)
	set +a

	unset http_modules http_confload
	http_modules=
	http_confload="${NGX_HTTP_CONFLOAD:-}"

	## filter out builtin http modules
	unset i
	for i in ${NGX_HTTP_MODULES:-} ; do
		[ -n "$i" ] || continue

		case "$i" in
		*/* | *\** | *\?* )
			log_always "module '$i' is not legal, skipping"
			continue
		;;
		esac

		if is_builtin_module http "$i" ; then
			log "$i is builtin module, moving to NGX_HTTP_CONFLOAD"
			http_confload=$(append_list "${http_confload}" "$i")
			continue
		fi

		## naive deduplication
		if list_have_item "${http_modules}" "$i" ; then
			log "$i is already specified"
			continue
		fi

		http_modules=$(append_list "${http_modules}" "$i")
	done ; unset i

	## grpc depends on http/2
	if list_have_item "${http_confload}" grpc ; then
		http_confload="${http_confload} v2"
	fi

	## fixes
	if list_have_item "${http_confload}" v2 ; then
		export NGX_HTTP_V2=1
	fi
	if list_have_item "${http_confload}" v3 ; then
		export NGX_HTTP_V3=1
	fi
	if list_have_item "${http_confload}" proxy ; then
		export NGX_HTTP_PROXY=1
	fi

	## adjustments
	[ "${NGX_HTTP_V2}" = 0 ]    || http_confload="${http_confload} v2"
	[ "${NGX_HTTP_V3}" = 0 ]    || http_confload="${http_confload} v3"
	[ "${NGX_HTTP_PROXY}" = 0 ] || http_confload="${http_confload} proxy"

	if [ -n "${http_modules:-}" ] ; then
		## angie-module-lua: depends on angie-module-ndk
		## angie-module-set-misc: depends on angie-module-ndk
		unset want_ndk ; want_ndk=0
		if list_have_item "${http_modules}" lua ; then
			want_ndk=1
		elif list_have_item "${http_modules}" set-misc ; then
			want_ndk=1
		fi
		if [ ${want_ndk} = 1 ] ; then
			## forcefully move 'ndk' to beginning of list
			http_modules=$(printf '%s' " ${http_modules} " | sed -zE 's/ ndk / /;s/^/ndk/;s/ $//')
		fi
		unset want_ndk

		## angie-module-wasm: http module requires core module to be loaded too
		while : ; do
			list_have_item "${http_modules}" wasm || break
			if list_have_item "${NGX_CORE_MODULES}" wasm ; then break ; fi

			log_always "adjusting NGX_CORE_MODULES to include 'wasm'"
			NGX_CORE_MODULES=$(append_list "${NGX_CORE_MODULES}" wasm)
			export NGX_CORE_MODULES
		break ; done
	fi

	set -a
	NGX_HTTP_MODULES="${http_modules}"
	NGX_HTTP_CONFLOAD=$(sort_dedup_list "${http_confload}")
	set +a

	unset http_modules http_confload

	## adjust caches
	unset m
	for m in fastcgi proxy scgi uwsgi ; do
		list_have_item "${NGX_HTTP_CONFLOAD}" $m || continue
		NGX_HTTP_CACHES="${NGX_HTTP_CACHES} temp_${m}"
	done ; unset m
	NGX_HTTP_CACHES=$(sort_dedup_list "${NGX_HTTP_CACHES}")
fi