#!/usr/bin/env bash

function downloadClouds() { #Download latest clouds image from matteason.co.uk if newer than the local copy exists
	echo downloading latest cloud image if newer...
	local sourceImage="${1:?Error output file not provided (arg 1)}"
	local httpStatus curlStatus
	local etagFile="${sourceImage}.etag"

	if [ ! -d "${sourceImage%/*}" ]; then # If the source directory does not exist, return an error code
		echo Could not find source image directory for clouds image
		return 1
	fi
	# TODO return sample image if the source image does not exist, or if the download fails
	# if [ ! -e "$sourceImage" ]; then # If the image path does not exist, return an error code
	# 	echo Cloud source image path does not exist
	# 	return 1
	# fi

	# Download the image saving the http status code and curl status code for error checking
	httpStatus=$(curl -s --show-error -R \
		--write-out "%{http_code}" \
		--etag-compare "$etagFile" \
		--etag-save "$etagFile" \
		-o "$sourceImage" \
		"https://clouds.matteason.co.uk/images/8192x4096/clouds.jpg" )
	curlStatus="$?"
 
	if (( curlStatus != 0 )); then # return an error code if curl failed to download the image
		echo "Cloud image request failed, curl exit status: $curlStatus" >&2
		return "$curlStatus"
	fi

	case "$httpStatus" in # Report the status of the download based on the HTTP status code returned by curl
		200) echo "Cloud image successfully downloaded"; return 0 ;;
		304) echo "Cloud image already up to date"; return 0 ;;
		"") echo "Cloud image successfully downloaded or already up to date"; return 0 ;;
		*) echo "Error: failed to download clouds image, HTTP status: $httpStatus" >&2; return 1 ;;
	esac
}

function downloadStations() { # Download latest stations data from celestrak.org and format it to only include the names of the stations
	echo downloading latest stations data...
	curl -s --show-error -L -o "$STATIONS_TLE" "https://celestrak.org/NORAD/elements/gp.php?GROUP=stations&FORMAT=tle" && echo stations data downloaded successfully || echo Error: failed to download stations data
	sed -i 's/\r//' "$STATIONS_TLE"  #Strip carriage returns from file if they exist
	# sed -n '1~3p' "$STATIONS_TLE" > "$STATIONS_FINAL" && echo stations data formatted successfully || echo Error: failed to format stations data
	# sed -n '1~3p' stations.tle | sed 's/[[:space:]]*$//' > stations
	sed -n '1~3p' stations.tle > stations

}

function connectedMonitors() { # returns list of connected monitors
	monitors=$(hyprctl monitors -j | jq ".[].name")
	echo "${monitors//$'\n'/ }"
}


function cacheImages() { # Validate that the images exist, cache them if they do, return a path to the temp image
	# TODO make functional
	local monitor="${1:?Error monitor name not provided (arg 1)}"
	local imageDir="${2:?Error image directory not provided (arg 2)}"
	local imagePath="$imageDir/$monitor-render.png"
	if [ -e "$imagePath" ]; then # If the Image exists, move it to a temp file and set it as the wallpaper
		echo image exists for "$monitor", caching old walpaper...
		mv "$imagePath" "$imagePath.tmp"
		noctalia msg wallpaper-set "$monitor" "$imagePath.tmp" 1>/dev/null && echo "$monitor walpaper cached" || echo "Warning: not connected to monitor $monitor, wallpaper will not be set."
		# TODO return here
	elif [ -e "$imagePath.tmp" ]; then # If temp exists but not the original, move temp back to original
		# TODO report work
		mv "$imagePath.tmp" "$monitor"
		noctalia msg wallpaper-set "$monitor" "$imagePath.tmp" 1>/dev/null && echo "$monitor walpaper cached" || echo "Warning: not connected to monitor $monitor, wallpaper will not be set."
		# TODO return here
	else
		echo Error: no previous image exists, using sample image instead
		noctalia msg wallpaper-set eDP-1 "$imagePath/sample-render.png" 1>/dev/null || return 1
		# TODO return 1 instead of exiting, and handle the error in the calling function
	fi
	# TODO handle this case
}

function old_cacheImages() { # Validate that the images exist and cache them if they do, otherwise use a sample image
	# Noctalia must see an image path update in order to change the active wallpaper
	# So set a tmp file with the current image, upodate to that tmp file, and then switch back once the image is rendered.
	# TODO: only render monitors that currectly exist.
	if [ -e "$OUTPUT_IMG_ULTRAWIDE" ]; then # Check for ultrawide image
		echo ultrawide image exists, caching old walpaper...
		mv "$OUTPUT_IMG_ULTRAWIDE" "$OUTPUT_IMG_ULTRAWIDE.tmp"
		noctalia msg wallpaper-set DP-2 "$OUTPUT_IMG_ULTRAWIDE.tmp" 1>/dev/null && echo ultrawide walpaper cached || echo Warning: not connected to monitor DP-2, wallpaper will not be set.
	elif [ -e "$OUTPUT_IMG_ULTRAWIDE.tmp" ]; then # If temp exists but not the original, move temp back to original
		mv "$OUTPUT_IMG_ULTRAWIDE.tmp" "$OUTPUT_IMG_ULTRAWIDE"
	else
		echo Error: no builtin image exists, using sample image instead
		noctalia msg wallpaper-set eDP-1 "test.png" 1>/dev/null || exit 1
	fi
	
	if [ -e "$OUTPUT_IMG_EDP" ]; then # Check for builtin image
		echo builtin image exists, caching old walpaper...
		mv "$OUTPUT_IMG_EDP" "$OUTPUT_IMG_EDP.tmp"
		noctalia msg wallpaper-set eDP-1 "$OUTPUT_IMG_EDP.tmp" 1>/dev/null || exit 1
	elif [ -e "$OUTPUT_IMG_EDP.tmp" ]; then # If temp exists but not the original, move temp back to original
		mv "$OUTPUT_IMG_EDP.tmp" "$OUTPUT_IMG_EDP"
	else # Use a smample image if no original or temp exists
		echo Error: no builtin image exists, using sample image instead
		noctalia msg wallpaper-set eDP-1 "test.png" 1>/dev/null || exit 1
	fi
}

function renderWallpaper() {
	NATIVE_RES="$1"
	MONITOR_NAME="$2"
	XPLANET_ARGS=$3
	OUTPUT_RES="$"


}

function cleanup() { # Cleanup temp files if no errors occurred
	rm "$OUTPUT_IMG_ULTRAWIDE.tmp"
	rm "$OUTPUT_IMG_EDP.tmp"
}