# create an array out of a list

proc add_to_env {my_array} {
	foreach {key value} [array get my_array] {
		set $::env($key) $value
	}
}

# helper function for argument parsing
proc is_keyword_arg { arg } {
  if { [string length $arg] >= 2 \
	 && [string index $arg 0] == "-" \
	 && [string is alpha [string index $arg 1]] } {
    return 1
  } else {
    return 0
  }
}

# parse arguments
proc parse_key_args { cmd arg_var key_var options {flag_var ""} {flags {}}} {
	upvar 1 $arg_var args
	upvar 1 $key_var key_value
	upvar 1 $flag_var flag_present
	set keys {}
	foreach option $options {
		set option_name [lindex $option 0]
		if { [lsearch -exact $option required ] >= 0} {
			set key_index [lsearch -exact $args [lindex $option 0]]
			if {$key_index < 0} {
				puts "Error: $cmd missing required $option_name "
				exit 
				}
		}
		lappend keys $option_name
	}

	set args_rtn {}
	while { $args != "" } {
		set arg [lindex $args 0]
		if { [is_keyword_arg $arg] } {
			set key_index [lsearch -exact $keys $arg]
			if { $key_index >= 0 } {
				set key $arg
				if { [llength $args] == 1 } {
					puts "Error: $cmd $key missing value."
					exit
				}
				set key_value($key) [lindex $args 1]
				set args [lrange $args 1 end]
			} else {
				set flag_index [lsearch -exact $flags $arg]
				if { $flag_index >= 0 } {
					  set flag_present($arg) 1
				}
			}
		} else {
			lappend args_rtn $arg
#			if { [info exists key] } {
#				lappend key_value($key) $arg
#			}
		}
		set args [lrange $args 1 end]
	}
	set args $args_rtn
}


# puts a variable in a log file
proc set_log {var val filepath log_flag} {
        set cmd "set ${var} ${val}"
        uplevel #0 ${cmd}
        set global_cfg_file [open $filepath a+]
		if { $log_flag } {
			puts $global_cfg_file $cmd
		}
        close $global_cfg_file
}

# a minimal try catch block
proc try_catch {args} {
        if { [catch {eval exec $args} error_msg] } { 
		set tool [string range $args 0 [string first " " $args]]
                set print_error_msg "\[ERROR\]: during executing: \"$args\"\nERROR message:\n$error_msg"
		puts stderr $print_error_msg
		puts stderr "\[WARN\]: Please check ${tool}log file"
		exit 1
        }
}

proc make_array {pesudo_dict prefix} {
	foreach element $pesudo_dict {
		set key [lindex $element 0]
		set value [lindex $element 1]
		set returned_array($key) ${prefix}${value}
	}
	return [array get returned_array]
}


namespace eval TIMER {
	variable timer_start
	variable timer_end
	
	proc timer_start {} {
		variable timer_start
		set timer_start [clock milliseconds]
	} 
	proc timer_stop {} {
		variable timer_end
		set timer_end [clock milliseconds]
	}

	proc get_runtime {} {
		variable timer_start
		variable timer_end
		set total_ms [expr {$timer_end - $timer_start }]
		set runtime_ms   [expr { int($total_ms) % 1000 }]
		set runtime_s [expr { int(floor($total_ms) / 1000) % 60 }]
		set runtime_m [expr { int(floor($total_ms / (1000*60))) % 60 }]
		set runtime_h  [expr { int(floor($total_ms / (1000*3600))) % 24 }]
		set runtime "${runtime_h}h${runtime_m}m${runtime_s}s${runtime_ms}ms"
		return $runtime
	}
}