#!/bin/sh
set -f

. /image-entry.d/00-common.envsh

[ "${NGX_STRICT_LOAD}" = 0 ] || set -e

load_error() {
	[ "${load_error_seen:-}" = 1 ] || log_always 'tree combine has failed'
	load_error_seen=1
	if [ "${NGX_STRICT_LOAD}" = 1 ] ; then
		t=10
		log_always "injecting delay for $t seconds"
		sleep $t
		exit 1
	fi
}

smart_ln() {
	if [ -h "$1" ] ; then
		ln_s "$(readlink -e "$1")" "$2"
	else
		cp "$1" "$2"
	fi
}

dirs='conf modules njs site'
[ "${NGX_PROCESS_STATIC}" = 0 ] || dirs="${dirs} static"
while read -r old_path ; do
	[ -n "${old_path}" ] || continue

	new_path=$(combine_remap_path "${old_path}")
	[ -n "${new_path}" ]

	new_dir="${new_path%/*}"
	[ -d "${new_dir}" ] || mkdir -p "${new_dir}"

	smart_ln "${old_path}" "${new_path}"
done <<-EOF
$(
	for n in ${dirs} ; do
		[ -d "${merged_root}/$n" ] || continue
		find "${merged_root}/$n/" ! -type d
	done | sort -V
)
EOF

if [ "${NGX_PROCESS_STATIC}" = 0 ] ; then
	for d in /angie/static /etc/angie/static /etc/angie/static.dist ; do
		[ -d "$d" ] || continue
		ln_s "$d" /run/angie/static
		break
	done
fi

dirs='cache lib log'
for n in ${dirs} ; do
	s="/angie/$n"
	d="/run/angie/$n"

	if [ -d "$s" ] ; then
		ln_s "$s" "$d"
	else
		[ -d "$d" ] || install_userdir "$d"
	fi
done

## provide same symlinks as upstream (both Angie and nginx) docker images do
d=/run/angie/log
[ -e "$d/access.log" ] || ln_s /dev/stdout "$d/access.log"
[ -e "$d/error.log" ]  || ln_s /dev/stderr "$d/error.log"

## Angie modules are loaded in [strict] order!
combine_modules() {
	[ -n "$1" ] || return 1
	n="$1" ; shift

	i=0
	for m ; do
		[ -n "$m" ] || continue

		old_name="mod/$n-$m.conf"

		old_path="${merged_root}/${old_name}"
		if ! [ -f "${old_path}" ] ; then
			log_always "file ${old_name} is not found"
			load_error
			log "file ${old_name} is skipped"
			continue
		fi

		new_path=$(printf "/run/angie/mod/$n-%02d-%s.conf" "$i" "$m")
		new_dir="${new_path%/*}"
		[ -d "${new_dir}" ] || mkdir -p "${new_dir}"

		smart_ln "${old_path}" "${new_path}"

		i=$((i+1))
	done
}

combine_modules core   ${NGX_CORE_MODULES:-}
combine_modules http   ${NGX_HTTP_MODULES:-}
combine_modules mail   ${NGX_MAIL_MODULES:-}
combine_modules stream ${NGX_STREAM_MODULES:-}

combine_snippets() {
	[ -n "$1" ] || return 1
	n="$1" ; shift

	for s ; do
		[ -n "$s" ] || continue

		old_name="snip/$n-$s.conf"

		old_path="${merged_root}/${old_name}"
		if ! [ -f "${old_path}" ] ; then
			log_always "file ${old_name} is not found"
			load_error
			log "file ${old_name} is skipped"
			continue
		fi

		new_path="/run/angie/${old_name}"
		new_dir="${new_path%/*}"
		[ -d "${new_dir}" ] || mkdir -p "${new_dir}"

		smart_ln "${old_path}" "${new_path}"
	done
}

combine_snippets core    ${NGX_CORE_SNIPPETS:-}
combine_snippets core_ev ${NGX_CORE_EVENTS_SNIPPETS:-}
combine_snippets http    ${NGX_HTTP_SNIPPETS:-}
combine_snippets mail    ${NGX_MAIL_SNIPPETS:-}
combine_snippets stream  ${NGX_STREAM_SNIPPETS:-}

combine_module_snippets() {
	[ -n "$1" ] || return 1
	n="$1" ; shift

	for s ; do
		[ -n "$s" ] || continue

		old_name="snip/$n-$s.conf"

		old_path="${merged_root}/${old_name}"
		if ! [ -f "${old_path}" ] ; then
			log "file ${old_name} is not found, skipping"
			continue
		fi

		new_path="/run/angie/${old_name}"
		new_dir="${new_path%/*}"
		[ -d "${new_dir}" ] || mkdir -p "${new_dir}"

		smart_ln "${old_path}" "${new_path}"
	done
}

combine_module_snippets core   ${NGX_CORE_MODULES:-}
combine_module_snippets http   ${NGX_HTTP_MODULES:-}
combine_module_snippets mail   ${NGX_MAIL_MODULES:-}
combine_module_snippets stream ${NGX_STREAM_MODULES:-}

## merge remaining snippets
while read -r old_path ; do
	[ -n "${old_path}" ] || continue

	new_path=$(combine_remap_path "${old_path}")
	[ -n "${new_path}" ] || exit 1

	new_dir="${new_path%/*}"
	[ -d "${new_dir}" ] || mkdir -p "${new_dir}"

	smart_ln "${old_path}" "${new_path}"
done <<-EOF
$(
	find "${merged_root}/snip/" ! -type d \
	| grep -Ev -e "^${merged_root}/snip/(core|core_ev|http|mail|stream)-[^/]*\.conf\$" \
	| sort -V
)
EOF

exit 0