#!/usr/bin/env bash
# shellcheck shell=bash
# - - - - - - - - - - - - - - - - - - - - - - - - -
##@Version           :  202609030524-git
# @@Author           :  Jason Hempstead
# @@Contact          :  jason@casjaysdev.pro
# @@License          :  LICENSE.md
# @@ReadME           :  start-runners --help
# @@Copyright        :  Copyright: (c) 2026 Jason Hempstead, Casjays Developments
# @@Created          :  Friday, Jun 05, 2026 18:14 EDT
# @@File             :  start-runners
# @@Description      :  Start act runners
# @@Changelog        :  New script
# @@TODO             :  Better documentation
# @@Other            :
# @@Resource         :
# @@Terminal App     :  no
# @@sudo/root        :  no
# @@Template         :  shell/bash
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# shellcheck disable=SC1001,SC1003,SC2001,SC2003,SC2016,SC2031,SC2090,SC2115,SC2120,SC2155,SC2199,SC2229,SC2317,SC2329
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VERSION="202609030524-git"
set -e
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trap 'retVal=$?; emoji=$( [ -z "$NO_COLOR" ] && echo "❌ " || echo "" ); \
echo "${emoji}Fatal error occurred: Exit code $retVal at line $LINENO in command: $BASH_COMMAND"; \
kill -TERM 1' ERR
trap 'retVal=$?;if [ "$SERVICE_IS_RUNNING" != "yes" ] && [ -f "$SERVICE_PID_FILE" ]; then rm -Rf "$SERVICE_PID_FILE"; fi;exit $retVal' SIGINT SIGTERM SIGPWR
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# Function to __log messages with timestamp
__log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" >>"$RUNNERS_LOG_DIR/runners" 2>&1; }
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# Function to cleanup child processes on exit
__cleanup() {
	__log "Shutting down runners..."
	kill $(jobs -p) 2>/dev/null || true
	wait
	__log "All runners stopped"
}
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# Set up signal handling
trap __cleanup SIGTERM SIGINT
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# Validate required environment variables
if [ -n "$SERVER_ADDRESS" ]; then
	if [[ "$SERVER_ADDRESS" != *"://"* ]]; then
		SERVER_ADDRESS="http://$SERVER_ADDRESS"
	fi
else
	SERVER_ADDRESS=http://$HOSTNAME
fi
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if [ -z "$SERVER_TOKEN" ]; then
	__log "ERROR: SERVER_TOKEN environment variable is required"
	exit 1
fi
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if [ -z "$RUNNER_LABELS" ]; then
	_default_runner_labels=(
		"linux:host"
		"node14:docker://node:14"
		"node16:docker://node:16"
		"node18:docker://node:18"
		"node20:docker://node:20"
		"node22:docker://node:22"
		"node:docker://node:latest"
		"perl:docker://perl:latest"
		"ruby:docker://ruby:latest"
		"python:docker://python:latest"
		"python3:docker://python:latest"
		"php7:docker://casjaysdevdocker/php:7"
		"php8:docker://casjaysdevdocker/php:8"
		"php:docker://casjaysdevdocker/php:latest"
		"alpine:docker://casjaysdev/alpine:latest"
		"debian:docker://casjaysdev/debian:latest"
		"ubuntu:docker://casjaysdev/ubuntu:latest"
		"rhel:docker://casjaysdev/almalinux:latest"
		"redhat:docker://casjaysdev/almalinux:latest"
		"almalinux:docker://casjaysdev/almalinux:latest"
		"act_runner:docker://catthehacker/ubuntu:full-latest"
		"ubuntu-latest:docker://catthehacker/ubuntu:full-latest"
	)
	RUNNER_LABELS="$(
		IFS=,
		echo "${_default_runner_labels[*]}"
	)"
	unset _default_runner_labels
fi
# Determine number of runners to start
RUNNERS_START=${RUNNERS_START:-1}
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# Validate RUNNERS_START is a positive integer
if ! [[ "$RUNNERS_START" =~ ^[0-9]+$ ]] || [ "$RUNNERS_START" -lt 1 ]; then
	__log "WARNING: Invalid RUNNERS_START value '$RUNNERS_START', defaulting to 1"
	RUNNERS_START=1
fi
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__log "Starting $RUNNERS_START act_runner instance(s)"
__log "Server Address: $SERVER_ADDRESS"
__log "Runner Name Prefix: ${RUNNER_NAME_PREFIX:-runner}"
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# Shared cache config so runner-N instances use the same cache-server
# started by zz-act_runner.sh instead of an unshared per-process cache.
RUNNERS_CACHE_CONFIG=""
if [ -n "$RUNNER_CACHE_HOST" ] && [ -n "$RUNNER_CACHE_PORT" ] && [ -n "$RUNNER_CACHE_SECRET" ]; then
	RUNNERS_CACHE_CONFIG="/config/act_runner/runners-cache.yaml"
	cat <<EOF >"$RUNNERS_CACHE_CONFIG"
cache:
  enabled: true
  external_server: 'http://${RUNNER_CACHE_HOST}:${RUNNER_CACHE_PORT}/'
  external_secret: '${RUNNER_CACHE_SECRET}'
EOF
fi
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# Register a single runner synchronously (no daemon start)
__register_runner() {
	local runner_id=$1
	local runner_name="${RUNNER_NAME_PREFIX:-runner}-${runner_id}"
	local runner_dir="/config/act_runner/reg/${runner_name}"
	local config_args=()

	mkdir -p "$runner_dir"
	[ -d "$runner_dir" ] && cd "$runner_dir" || return 1
	[ -n "$RUNNERS_CACHE_CONFIG" ] && config_args=(--config "$RUNNERS_CACHE_CONFIG")

	if [ ! -f "$runner_dir/.runner" ]; then
		__log "Registering runner: $runner_name (ID: $runner_id)"
		act_runner register "${config_args[@]}" --instance "$SERVER_ADDRESS" --token "$SERVER_TOKEN" --name "$runner_name" --labels "$RUNNER_LABELS" --no-interactive
		if [ $? -ne 0 ]; then
			__log "ERROR: Failed to register runner $runner_name"
			return 1
		fi
	fi
	__log "Runner $runner_name registered"
}
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# Start daemon for a single runner (called in background after all are registered)
__start_runner_daemon() {
	local runner_id=$1
	local runner_name="${RUNNER_NAME_PREFIX:-runner}-${runner_id}"
	local runner_dir="/config/act_runner/reg/${runner_name}"
	local config_args=()

	[ -d "$runner_dir" ] && cd "$runner_dir" || return 1
	[ -n "$RUNNERS_CACHE_CONFIG" ] && config_args=(--config "$RUNNERS_CACHE_CONFIG")
	__log "Starting daemon for runner: $runner_name"
	exec act_runner daemon "${config_args[@]}"
}
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# Phase 1: register all runners sequentially so IDs are assigned in order
for i in $(seq 1 $RUNNERS_START); do
	__register_runner "$i" || { __log "Aborting: registration failed for runner-$i"; exit 1; }
done
unset i
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# Phase 2: start all daemons in parallel
for i in $(seq 1 $RUNNERS_START); do
	(__start_runner_daemon "$i") &
done
unset i
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RUNNERS_ID="$(jobs -p | tr '\n' ' ')"
if [ -n "$RUNNERS_ID" ]; then
	__log "All $RUNNERS_START runners started successfully"
	__log "Process IDs: $RUNNERS_ID"
	printf 'All %s runners started successfully: %s\n' "$RUNNERS_START" "$RUNNERS_ID"
else
	__log "The runners have failed to start"
	printf '%s\n' "The runners have failed to start"
fi
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# Wait for all background processes
wait