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

# The name of this project
project_name="Msc Summer Project";

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

###
# Custom Settings
###

# Put any custom settings here.


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

# 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 "    ${CACTION}server-ttn${RS}       - Execute the Node.js TTN receiver.";
	echo -e "    ${CACTION}client${RS}           - Build the client-side code.";
	echo -e "    ${CACTION}client-watch${RS}     - Auto-rebuild the client-side code on modification.";
	echo -e "    ${CACTION}server${RS}       - Start a temporary web server for the browser-based web interface.";
	echo -e "    ${CACTION}server-stop${RS}  - Stop a temporary web server.";
	echo -e "";
	echo -e "${CSECTION}Extra development actions${RS}";
	echo -e "    ${CACTION}render${RS}           - Render the report";
	echo -e "    ${CACTION}geojson-debug${RS}    - Generate some GeoJSON from the raw readings for debugging purposes (paste into geojson.io)";
	echo -e "";
	
	exit 1;
fi

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


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# Toggles commenting and uncommenting lines in a file that contain a specific 
# substring. Checks for word boundaries either side of the substring.
# From https://stackoverflow.com/a/24901636/1460422
# $1 - Filename
# $2 - Search string
comment_toggle() {
	filename="${1}";
	search_string="${2}";
	
	awk -v commentId='//' -v word="${search_string}" '
	  $0 ~ "(^|[[:punct:][:space:]])" word "($|[[:punct:][:space:]])" { 
	    if (match($0, "^[[:space:]]*" commentId))
	      $0 = substr($0, RSTART + RLENGTH)
	    else
	      $0 = commentId $0
	  } 
	  { print }' "${filename}" > tmpfile.$$ && mv tmpfile.$$ "${filename}"
}

task_setup() {
	stage_begin "Setting up";
	
	task_begin "Checking Environment";
	check_command git true;
	check_command awk true;
	check_command inotifywait true optional;
	if [[ "$?" -ne "0" ]]; then echo "${HC}inotifywait${RS} is required to auto-rebuild on when the client-side code changes."; fi
	check_command pdflatex true	optional;
	if [[ "$?" -ne "0" ]]; then echo "${HC}pdflatex${RS} is required to render the reports."; fi
	check_command bibtex true optional;
	if [[ "$?" -ne "0" ]]; then echo "${HC}bibtex${RS} is required to render the reports."; fi
	task_end $?;
	
	task_begin "Initialising submodules";
	git submodule update --init;
	task_end $?;
	
	task_begin "Preconfiguring libraries";
	config_file_directory="./iot/libraries/arduino-lmic/src/lmic/";
	config_file_name="config.h";
	cd "${config_file_directory}";
	git reset --hard;
	# Disable OTAA
	comment_toggle "${config_file_name}" "#define DISABLE_JOIN";
	# Disable class b stuff
	comment_toggle "${config_file_name}" "#define DISABLE_PING";
	comment_toggle "${config_file_name}" "#define DISABLE_BEACONS";
	# Disable other misc. stuff we're not likely to use
	comment_toggle "${config_file_name}" "#define DISABLE_MCMD_DCAP_REQ"; # Duty cycle cap - won't work anyway 'cause we're shutting down in between
	comment_toggle "${config_file_name}" "#define DISABLE_MCMD_DN2P_SET"; # Receiving stuff
	
	# echo "#define DISABLE_JOIN" >>"${config_file_name}";
	# echo "#define DISABLE_PING" >>"${config_file_name}";
	# echo "#define DISABLE_BEACONS" >>"${config_file_name}";
	cd -;
	task_end $?;
	
	task_begin "Installing server dependencies";
	npm install;
	exit_code="${?}";
	task_end ${exit_code};
	
	stage_end 0;
}


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task_server-ttn() {
	execute node --experimental-modules ./server/index.mjs ttn-app-server;
}


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task_client() {
	task_begin "Packaging Javascript";
	execute node_modules/rollup/bin/rollup --sourcemap --config rollup.main.config.js;
	execute node_modules/rollup/bin/rollup --sourcemap --config rollup.worker.config.js;
	task_end $? "Error: rollup packing failed!";
	
	task_begin "Copying html";
	execute cp client_src/index.html "app/";
	task_end $?;
}

task_client-watch() {
	set_title "Client Watcher";
	
	
	# execute node_modules/rollup/bin/rollup --watch --sourcemap --config rollup.config.js &
	
	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 common rollup.*.config.js;
		
		task_begin "Copying html";
		execute cp client_src/index.html "app/";
		task_end $?;
		
		stage_begin "Rebuilding client code";
		set +e; tasks_run client; set -e;
		stage_end $?;
	done
}


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task_server() {
	if [ ! -f "app/index.html" ]; then
		echo "No client-side code detected, running build script";
		tasks_run client;
	fi
	
	task_begin "Starting development server";
	php -S "[::1]:40382" -t "app" &
	exit_code=$?;
	[[ "${exit_code}" -eq "0" ]] && echo $! >/tmp/summer-project-dev-server.pid;
	task_end $?; # Should be 0 unless php died for some reason
	sleep 1;
}

task_server-stop() {
	task_begin "Stopping development server";
	
	if [ ! -f "/tmp/summer-project-dev-server.pid" ]; then
		echo -e "${HC}${FRED}Error: The development server doesn't appear to be running, so it can't be stopped. Have you tried running ./build dev-server?${RESET}";
		return 1;
	fi
	
	kill "$(cat /tmp/summer-project-dev-server.pid)";
	rm /tmp/summer-project-dev-server.pid;
	
	task_end $?;
}

task_geojson-debug() {
	sqlite3 lorawan.sqlite 'SELECT readings.latitude, readings.longitude, rssis.rssi FROM readings LEFT JOIN rssis ON readings.id = rssis.reading_id ORDER BY readings.latitude,readings.longitude;' | perl -pe 'chomp if eof' | jq --raw-input --slurp 'split("\n") | map(split("|") | map(if . == "" then null else tonumber end)) | map({type: "Feature", geometry: { type: "Point", "coordinates": [ .[1], .[0] ] }, properties: { "rssi": .[2], "marker-color": (if .[2] == null then "#dd0707" else "#04a104" end), "marker-symbol": "circle" }}) | { type: "FeatureCollection", features: . }'
}

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


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task_render() {
	_render-latex-pdf "Reports/Initial-Report/Initial-Report.tex";
}

# $1 - Location of top-level LaTeX file
_render-latex-pdf() {
	if [[ ! -f "$1" ]]; then
		task_end 1 "Error: Couldn't find '$1'";
	fi
	
	task_begin "Entering directory";
	latex_filename="$(basename "$1")";
	latex_directory="$(dirname "$1")";
	
	execute cd "${latex_directory}";
	execute echo "${PWD}";
	task_end $? "Failed to enter directory (does it exist?)";
	
	task_begin "Cleaning up";
	find -iname "*.aux" -delete; # Ref: https://tex.stackexchange.com/q/381057
	find -iname "*.bbl" -delete;
	find -iname "*.blg" -delete;
	find -iname "*.out" -delete;
	task_end $? "Error: Failed to clean up after last build";
	
	# task_begin "Rendering images";
	# # FUTURE: Do this in paralell?
	# for svg_filename in $(find "images/" -type f -iname "*.svg"); do
	# 	execute inkscape -e ${svg_filename%%.svg}.png ${svg_filename};
	# 	exit_code=$?;
	# 	[[ "${exit_code}" -eq 0 ]] || break;
	# done
	# task_end "${exit_code}";
	
	task_begin "Building Report";
	set -e;
	execute pdflatex --output-directory=. "${latex_filename}";
	execute bibtex "${latex_filename%.*}";
	execute pdflatex --output-directory=. "${latex_filename}";
	execute pdflatex --output-directory=. "${latex_filename}";
	execute bibtex "${latex_filename%.*}";
	execute pdflatex --output-directory=. "${latex_filename}";
	execute pdflatex --output-directory=. "${latex_filename}";
	set +e;
	task_end $? "Error: Failed to build report";
	
	task_begin "Moving report";
	execute mv *.pdf ..;
	task_end $? "Failed to move report";
	
	cd -;
}


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

tasks_run $@;