#!/usr/bin/env bash

#################################################################################
# This is the main script of os-configurer it'run purpose it to orchestrate all   #
# others scripts that configure the system. Each script is a simple bash script #
#################################################################################


#################################################################################
# Each configuration script is defined as run and its purpose is to configure a #
# part of the system e.g. git username or installing some packages (browsers,   #
# terminal-emulator, configuring tmux, etc)                                     #
#################################################################################

# helper logging functions
log() {
    if [[ $dry_run == "1" ]]; then
        echo "[DRY_RUN]: $1"
    else
        echo "$1"
    fi
}

debug() {
    if [[ $verbose_mode == "1" ]]; then
        echo "[DEBUG]: $1"
    fi
}

print_help() {
		echo "Welcome to os-configurer help menu. Valid comands:"
		echo "When creating runs, use number prefixes to ensure the correct executing order"
		echo "./run --dry  --> Runs in dry mode"
		echo "./run -v     --> Runs in verbose mode (put as first argument if you need argument debugging)"
		echo "./run -l     --> Prints the list of available runs"
		echo "./run -h     --> Print this help menu"
		echo "./run [-vlh] [module to run] --> if specified runs only a module or a set of modules that match the regex"
		exit 0
}

# if empty all runs are executed otherwise only runs that are in this filter are executed
filter=""
dry_run="0"
verbose_mode="0"

# argument parsing
while [[ $# -gt 0 ]]; do
    debug "parsing argument: \"$1\""
    if [[ "$1" == "--dry" ]]; then
        dry_run="1"
				debug "setting dry_run to $dry_run"
    elif [[ "$1" == "-v" ]]; then
        verbose_mode="1"
				debug "setting verbose_mode to $verbose_mode"
    elif [[ "$1" == "-h" ]]; then
				debug "Printing help menu"
				print_help
    elif [[ "$1" == "-l" ]]; then
				debug "Printing all scripts"
				script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
                debug $script_dir
                log "$(find $script_dir/runs -mindepth 2 -maxdepth 2 -executable | sort)"
				exit 0
    else
				filter="$1"
				debug "setting filter to $filter"
    fi
    shift
done

debug "verbose mode is active"

debug "getting path of this script (directory):"
script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
debug $script_dir

debug "getting all runs script paths"
runs_dir=`find $script_dir/runs -mindepth 2 -maxdepth 2 -executable | sort`
debug $runs_dir

log "running with current filter: \"$filter\""
for run in $runs_dir; do
    if echo "$run" | grep -vq "$filter"; then
        log "skipping: grep \"$filter\" filtered out $run"
        continue
    fi

    log "running script: $run"
    if [[ $dry_run == "0" ]]; then
			# change directory to current executing script
			cd $(dirname $run)
			# run the script
			$run $(dirname $run)
    fi
done