#!/usr/bin/env bash
# This script creates colored folder icons
#
# Colors of the folder icon:
#
#   @ - primary color
#	. - secondary color
#	" - color of symbol
#	* - color of paper
#
#    ..................
#    ..................
#    ........................................
#    ..************************************..
#    ..************************************..
#    ..************************************..
#    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@""""@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@""""@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@""""@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@""""@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@""""""""""""@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@""""""""""@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@""""""@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@@""@@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@""""""""""""@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
#    @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

set -eo pipefail

SCRIPT_DIR="$(dirname "$0")"
TARGET_DIR="$SCRIPT_DIR/../Papirus"

DEFAULT_COLOR="blue"
SIZES_REGEX="(16x16|22x22|24x24|32x32|48x48|64x64)"
COLOR_SIZES_REGEX="(22x22|24x24|32x32|48x48|64x64)"
FILES_REGEX="(folder|user)-"

declare -A COLORS

COLORS=(
	# [0] - primary color
	# [1] - secondary color
	# [2] - color of symbol
	# [3] - color of paper
	#
	# | name   | [0]   | [1]   | [2]   | [3]   |
	# |--------|-------|-------|-------|-------|
	[blue]="    #5294e2 #4877b1 #1d344f #e4e4e4"
	[black]="   #4f4f4f #3f3f3f #c2c2c2 #dcdcdc"
	[bluegrey]="#607d8b #4d646f #222c31 #e4e4e4"
	[brown]="   #ae8e6c #957552 #3d3226 #e4e4e4"
	[cyan]="    #00bcd4 #0096aa #00424A #e4e4e4"
	[green]="   #87b158 #60924b #2f3e1f #e4e4e4"
	[grey]="    #8e8e8e #727272 #323232 #e4e4e4"
	[magenta]=" #ca71df #b259b8 #47274e #e4e4e4"
	[orange]="  #ee923a #dd772f #533314 #e4e4e4"
	[red]="     #e25252 #bf4b4b #4f1d1d #e4e4e4"
	[teal]="    #16a085 #12806a #08382e #e4e4e4"
	[violet]="  #a674de #8b58c5 #3a284d #e4e4e4"
	[yellow]="  #e2b322 #b58f1b #4f3e0c #e4e4e4"
	[custom]="  #value_light #value_dark #323232 #e4e4e4"
)


msg() {
	printf "%b => %b%s\n" "\e[1;32m" "\e[0m" "$*" >&2
	# printf '%*s\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' -
}

warn() {
	printf "%b [+] %b%s\n" "\e[1;33m" "\e[0m" "$*" >&2
}

recolor() {
	# args: <old colors> <new colors> <path to file>
	declare -a old_colors=( $1 )
	declare -a new_colors=( $2 )
	local filepath="$3"

	[ -f "$filepath" ] || exit 1

	for (( i = 0; i < "${#old_colors[@]}"; i++ )); do
		sed -i "s/${old_colors[$i]}/${new_colors[$i]}/gI" "$filepath"
	done
}


msg "PHASE 1: Delete color suffix from monochrome icons ..."
# -----------------------------------------------------------------------------
find "$TARGET_DIR" -regextype posix-extended \
	-regex ".*/16x16/places/${FILES_REGEX}${DEFAULT_COLOR}-.*" \
	-print0 | while read -r -d $'\0' file; do

	new_file="${file/-$DEFAULT_COLOR-/-}"

	warn "'$file' is renamed to '$new_file'"
	mv -f "$file" "$new_file"
done


msg "PHASE 2: Create missing symlinks ..."
# -----------------------------------------------------------------------------
find "$TARGET_DIR" -type f -regextype posix-extended \
	-regex ".*/${COLOR_SIZES_REGEX}/places/${FILES_REGEX}${DEFAULT_COLOR}[-\.].*" \
	-print0 | while read -r -d $'\0' file; do

	target="$(basename "$file")"
	symlink="${file/-$DEFAULT_COLOR/}"

	[ -e "$symlink" ] && continue

	warn "Creating missing symlink '$symlink' ..."
	ln -sf "$target" "$symlink"
done


msg "PHASE 3: Generate color folders ..."
# -----------------------------------------------------------------------------
find "$TARGET_DIR" -type f -regextype posix-extended \
	-regex ".*/${SIZES_REGEX}/places/${FILES_REGEX}${DEFAULT_COLOR}[-\.].*" \
	-print0 | while read -r -d $'\0' file; do

	for color in "${!COLORS[@]}"; do
		[[ "$color" != "$DEFAULT_COLOR" ]] || continue

		new_file="${file/-$DEFAULT_COLOR/-$color}"

		cp -P --remove-destination "$file" "$new_file"
		recolor "${COLORS[$DEFAULT_COLOR]}" "${COLORS[$color]}" "$new_file"
	done
done


msg "PHASE 4: Create symlinks for Folder Color v0.0.80 and newer ..."
# -----------------------------------------------------------------------------
# Icons mapping
FOLDER_COLOR_MAP=(
	# Folder Color icon         | Papirus icon
	# --------------------------|---------------------------
	"folder-COLOR-desktop.svg    user-COLOR-desktop.svg"
	"folder-COLOR-downloads.svg  folder-COLOR-download.svg"
	"folder-COLOR-public.svg     folder-COLOR-image-people.svg"
	"folder-COLOR-videos.svg     folder-COLOR-video.svg"
)

for mask in "${FOLDER_COLOR_MAP[@]}"; do
	for color in "${!COLORS[@]}"; do
		icon_mask=( $mask )
		folder_color_icon="${icon_mask[0]/COLOR/$color}"
		icon="${icon_mask[1]/COLOR/$color}"

		find "$TARGET_DIR" -regextype posix-extended \
			-regex ".*/${SIZES_REGEX}/places/${icon}" \
			-print0 | while read -r -d $'\0' file; do

			base_name="$(basename "$file")"
			dir_name="$(dirname "$file")"

			ln -sf "$base_name" "$dir_name/$folder_color_icon"
		done
	done
done


msg "PHASE 5: Copy color folder icons to derivative themes ..."
# -----------------------------------------------------------------------------
COLOR_NAMES="${!COLORS[*]}"  # get a string of colors
COLOR_REGEX="(${COLOR_NAMES// /|})"  # convert the list of colors to regex
DERIVATIVES=(
	ePapirus
	Papirus-Adapta
	Papirus-Adapta-Nokto
	Papirus-Dark
	Papirus-Light
)  # array of derivative icon themes with 16x16 places

find "$TARGET_DIR" -regextype posix-extended \
	-regex ".*/16x16/places/folder-${COLOR_REGEX}.*" \
	-print0 | while read -r -d $'\0' file; do

	for d in "${DERIVATIVES[@]}"; do
		cp -P --remove-destination "$file" "${file/Papirus/$d}"
	done
done


msg "PHASE 6: Copy places icons to Pairus-Adapta ..."
# -----------------------------------------------------------------------------
for size in 22x22 24x24 32x32 48x48 64x64; do
	rsync -a --delete "$TARGET_DIR/$size/places" \
		"$TARGET_DIR/../Papirus-Adapta/$size/"
done


msg "PHASE 7: Remap symlinks for Papirus-Adapta ..."
# -----------------------------------------------------------------------------
ADAPTA_COLOR="cyan"

find "$TARGET_DIR/../Papirus-Adapta" -type f -regextype posix-extended \
	-regex ".*/${COLOR_SIZES_REGEX}/places/${FILES_REGEX}${ADAPTA_COLOR}[-\.].*" \
	-print0 | while read -r -d $'\0' file; do

	target="$(basename "$file")"
	symlink="${file/-$ADAPTA_COLOR/}"

	# warn "Creating missing symlink '$symlink' ..."
	ln -sf "$target" "$symlink"
done