#!/usr/bin/env bash

set -e
set -o nounset
set -o pipefail

declare file
declare -a yayflags

THIS_FILE=${BASH_SOURCE[0]}
LOG_LABEL=${LOG_LABEL:-$(basename $THIS_FILE)}
LOG_FILE=${LOG_FILE:-"$LOG_LABEL.log"}
DEV_ENV=${DEV_ENV:-""}

MODE=${RUN_MODE:-"install"}
DRY_RUN=${LOG_ENABLE_DRY_RUN:-"0"}
GREP_STR=${RUN_GREP_STR:-""}

log() {
	logging log --source "$THIS_FILE" --echo "$@"
}

run_before_or_after() {
	local dir file run
	dir=${1:-""}
	run=${2:-""}

	file=$(find "$dir" -mindepth 1 -maxdepth 1 -executable -name "$(basename "$run")" | head -1)
	if [[ -n "$file" ]]; then
		log "	running $(basename "$dir") script: '$file'"
		[[ $DRY_RUN == "0" ]] && source "$file" "$mode"
	fi
}

main() {
	local line pkg

	log "RUN: file: $file"

	if [[ -z $GREP_STR ]] || [[ $file =~ $GREP_STR ]]; then

		log "${MODE}ing packages from: $file"

		run_before_or_after "$DEV_ENV/runs/before" "$file"

		# Loop over lines in the file and install the packages.
		while IFS= read -r line; do
			# Skip lines that begin with '#' (comments)
			if [[ ! $line =~ ^# ]]; then
				# Remove any inline comments.
				pkg=${line%% \#*}
				if [[ -n $pkg ]]; then
					log "	pkg: '$pkg'"
					[[ $DRY_RUN == "0" ]] && yay "${yayflags[@]}" "$pkg"
				fi
			fi
		done <"$file"

		run_before_or_after "$DEV_ENV/runs/after" "$file"
	else
		log "Grep filtered out: '$file'"
	fi
}

############################## MAIN ##############################

# Setup logging file and label.
source "$SCRIPTS/hypr/logging"
setup-logging "$LOG_FILE" "$LOG_LABEL"

file=${1:-""}
yayflags=("-S" "--noconfirm" "--needed")

[[ -z "$DEV_ENV" ]] &&
	log --error "env var DEV_ENV needs to be present" && exit 1
[[ ! -r $file ]] &&
	log --error "File not readable." && exit 1

# Change yay flags if mode is 'uninstall'
[[ $MODE == "uninstall" ]] && yayflags=("-Rns")

# Ensure yay is installed before proceeding.
[[ $DRY_RUN == "0" ]] && . "$DEV_ENV/runs/before/yay"

main