#!/usr/bin/env bash
readonly dependency=("kdrag0n/base16-kitty")
readonly app="kitty"
#
# Kitty reads its theme from the `current-theme.conf` file
# in its .config directory.

path="$1"
package="$2"
theme="$3"
permanent="$4"

kitty_conf="$HOME/.config/kitty/kitty.conf"
include_conf="$HOME/.config/kitty/current-theme.conf"

## Main Entrypoint
#
#  Finds the right theme template file and starts theme
#  switching and, if necessary, permanent setting processes.
main() {
    dbg_msg $app "Starting Processor"
    tfile="$path/$package/colors/base16-$theme.conf"

    if ! file_exists "$tfile"; then
        dbg_msg $app "error" "Theme template $theme not found in package $package"
        exit 1
    fi

    if [ ! -f "$kitty_conf" ]; then
        dbg_msg $app "error" "Alacritty config file not found. Please make sure file exists: $kitty_conf"
    fi

    if [[ $permanent == "true" ]]; then save; fi
    theme

    dbg_msg $app "Processor Done"
}

## Theme switcher
#
#  Makes sure that if any application instance is
#  currently running, it switches to new theme.
theme() {
    :
    # currently needs to be done through ANSI theme processor.
    # May be doable with some invocation of kitty loading config files.
    # Probably needs kitty to run with remote execution enabled.
}

## Theme setter
#
#  Takes care of permanently writing the desired
#  base16 theme into application settings.
save() {
    dbg_msg $app "Saving theme"

    # replace colorscheme.yml content with new one
    cp "$tfile" "$include_conf"
    dbg_msg $app "Wrote theme file to $include_conf"

    # find import line in alacritty conf
    if ! grep -qe "^include ${include_conf##*/}" "${kitty_conf}"; then
        printf "\ninclude %s\n" "${include_conf##*/}" >>"$kitty_conf"
        dbg_msg $app "Including theme file in imports"
    fi

}

# Safe sourcing: https://stackoverflow.com/a/12694189
DIR="${BASH_SOURCE%/*}"
if [[ ! -d $DIR ]]; then DIR="$PWD"; fi
# shellcheck source=utilities.sh
. "$DIR/utilities.sh"
## Dependency Checker
#
#  Makes sure the processor is called for the correct
#  base16 package, or refuses to run if it is not.
if printf '%s\n' "${dependency[@]}" | grep -q -P "^$package$"; then
    main
else
    dbg_msg $app "error" "Processor does not work for package $package"
fi