# Perhaps this should go in the utils module.
import sys
import time


class ProgressPrinter(object):
    "Utility class for printing some simple progress output for installs/uninstalls"

    def __init__(self, msg, section=False, indent=0):
        self.start = time.time()
        if indent:
            sys.stdout.write("    " * indent)
        if section:
            sys.stdout.write(msg)
        else:
            sys.stdout.write("%s..." % msg)
        sys.stdout.flush()

    def finish(self, msg="done"):
        end = time.time()
        elapsed = max(min((end - self.start) * 20, 2), 0.5)
        finish_at = end + elapsed

        now = end
        while now < finish_at:
            sys.stdout.write(".")
            sys.stdout.flush()
            time.sleep(0.05)
            now = time.time()
        sys.stdout.write("%s\n" % msg)
        sys.stdout.flush()