#!/usr/bin/env bash
# Make sure the current directory is the location of this script to simplify matters
cd "$(dirname $(readlink -f $0))";

if [ ! -d "${PWD}/.git" ]; then
	echo -e "\033[1m\033[31mError: The .git folder does not appear to exist. Please ensure you clone this repository with git, like this:\n\n\tgit clone https://github.com/ConnectedHumber/Air-Quality-Web.git\n\033[0m";
	exit 1;
fi
################
### Settings ###
################

# The name of this project
project_name="Air Quality Mapper";

# The path to the lantern build engine git submodule
lantern_path="./lantern-build-engine";

###
# Custom Settings
###

# Put any custom settings here.

# Client-side build output
cache_dir="./.cache";
build_output_folder="./app";

# Database settings for ssh port forwarding task
database_host="db.connectedhumber.org";
database_name="aq_db";

# Minimum major version of npm
min_npm_version_major="6";

###############################################################################

# Check out the lantern git submodule if needed
if [ ! -f "${lantern_path}/lantern.sh" ]; then git submodule update --init "${lantern_path}"; fi

source "${lantern_path}/lantern.sh";

if [[ "$#" -lt 1 ]]; then
	echo -e "${FBLE}${project_name}${RS} build script";
	echo -e "    by Starbeamrainbowlabs";
	echo -e "${LC}Powered by the lantern build engine, v${version}${RS}";
	echo -e "";
	echo -e "${CSECTION}Usage${RS}";
	echo -e "    ./build ${CTOKEN}{action}${RS} ${CTOKEN}{action}${RS} ${CTOKEN}{action}${RS} ...";
	echo -e "";
	echo -e "${CSECTION}Available actions${RS}";
	echo -e "    ${CACTION}setup${RS}            - Perform initial setup";
	echo -e "    ${CACTION}setup-dev${RS}        - Perform additional setup for development environments. Run after ${CACTION}setup${RS}.";
	echo -e "    ${CACTION}database${RS}         - Connect to the database via SSH & open MariaDB CLI connection, prompting for a password";
	echo -e "    ${CACTION}dev-server${RS}       - Start a development server";
	echo -e "    ${CACTION}dev-server-stop${RS}  - Stop the currently running development server";
	echo -e "    ${CACTION}client${RS}           - Build the client web app";
	echo -e "    ${CACTION}client-watch${RS}     - Watch for changes to the client code & rebuild automatically";
	echo -e "    ${CACTION}docs${RS}             - Render the documentation";
	echo -e "    ${CACTION}ci${RS}               - Perform CI tasks";
	echo -e "    ${LC}${CACTION}archive${RS}          - CI: Create release archive";
	echo -e "";
	
	exit 1;
fi

###############################################################################


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task_download-composer() {
	if [ -f "${cache_dir}/composer" ]; then
		return 0;
	fi
	[ ! -d "${cache_dir}" ] && mkdir "${cache_dir}";
	
	
	task_begin "Downloading composer"; 
	curl "https://getcomposer.org/composer.phar" -o "${cache_dir}/composer"; exit_code=$?;
	chmod +x "${cache_dir}/composer";
	task_end ${exit_code};
}

task_setup() {
	stage_begin "Setting up";
	
	task_begin "Checking environment";
	check_command git true;
	check_command php true;
	check_command node true;
	check_command npm true;
	
	if [ ! -w "${PWD}" ]; then
		task_end 1 "${HC}${FRED}Error: Can't write to the repository directory! This usually you have a permission error of some kind. Try using sudo to run this build command as the user that owns this cloned repository.";
	fi
	
	npm_version_major="$(npm --version | head -c 1)";
	if [[ "${npm_version_major}" -lt "${min_npm_version_major}" ]]; then
		echo "${FRED}${HC}Error: Your version of npm is too far out of date. You're running version $(npm --version), but version 6+ is required.";
	fi
	task_end $?;
	
	task_begin "Initialising submodules";
	git submodule update --init;
	task_end $?;
	
	task_begin "Installing client dependencies";
	echo -e "${HC}Not including developement dependencies. To complete setup for development, execute the ${CACTION}setup-dev${RS} ${HC}build task.${RS}";
	npm install --production;
	task_end $?;
	
	tasks_run download-composer;
	
	task_begin "Installing server dependencies";
	"${cache_dir}/composer" install --no-dev;
	task_end $?;
	
	if [ ! -d "./data" ]; then
		task_begin "Setting up initial data folder";
		mkdir "./data"; chmod 0700 "./data";
		
		echo -e "# -------[ Custom Settings File - Last updated $(date) ]-------" >"./data/settings.toml";
		echo -e '[database]\nusername = "INSERT_DATABASE_USERNAME_HERE"\npassword = "INSERT_DATABASE_PASSWORD_HERE";' >>"./data/settings.toml";
		chmod 0600 "./data/settings.toml";
		
		echo -e "${HC}Don't forget to edit './data/settings.toml' to specify the database username and password${RS}";
		echo -e "";
		
		task_end $?;
	fi
	
	stage_end $?;
}

task_setup-dev() {
	task_begin "Checking environment";
	check_command mysql true optional;
	task_end $?;
	
	task_begin "Installing client development dependencies";
	npm install;
	task_end $?;
	
	task_begin "Installing server development dependencies";
	"${cache_dir}/composer" install;
	task_end $?;
}


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task_database() {
	task_begin "Connecting to the database";
	set-title "Database";
	ssh -TN "${database_host}" -L 3306:localhost:3306 &
	ssh_pid=$!;
	sleep 1;
	mysql --host 127.0.0.1 --port 3306 --database "${database_name}" --user "${USER}" --password;
	
	kill "${ssh_pid}"; wait; sleep 0.5;
	task_end $?;
}

task_dev-server() {
	task_begin "Starting development server";
	php -S [::1]:40482 &
	exit_code=$?;
	echo $! >/tmp/micro-lantern-dev-server.pid;
	task_end $?; # Should be 0 unless php died for some reason
	sleep 1;
}

task_dev-server-stop() {
	task_begin "Stopping development server";
	
	kill "$(cat /tmp/micro-lantern-dev-server.pid)";
	rm /tmp/micro-lantern-dev-server.pid;
	
	task_end $?;
}


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task_client() {
	task_begin "Packaging Javascript";
	node_modules/rollup/bin/rollup --sourcemap --config rollup.config.js;
	task_end $? "Error: rollup packing failed!";
	
	task_begin "Copying html";
	cp client_src/index.html "${build_output_folder}";
	task_end $?;
	
	# task_begin "Copying css";
	# # FUTURE: Package this up too?
	# cp -r client_src/css/ "${build_output_folder}";
	# task_end $?;
}

task_client-watch() {
	set-title "Client Watcher";
	
	echo -e "Watching for changes.";
	while :; do # : = infinite loop
		# Wait for an update
		# inotifywait's non-0 exit code forces an exit for some reason :-/
		inotifywait -qr --event modify --format '%:e %f' client_src;
		
		# Rebuild the client code - spawn a sub-process to avoid the hard exit
		# This still doesn't work though, which is *really* annoying
		stage_begin "Rebuilding client code";
		./build client;
		stage_end $?;
	done
}


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task_docs() {
	task_begin "Rendering docs";
	node_modules/.bin/nightdocs --config nightdocs.toml;
	task_end $?;
}


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task_ci() {
	tasks_run setup setup-dev
	NODE_ENV="production" tasks_run client docs archive;
}

task_archive() {
	# We include the data directory here because we assume that this task is ONLY run in a CI environment, so it should only contain the default setup generated by an earlier task.
	tar -cafv "${ARCHIVE}/Air-Quality-Web.tar.gz" app/ __nightdocs/ lib/ logic/ vendor/ data/ *.php *.md LICENSE version settings.default.toml
}


#########################################################################

tasks_run $@;