import importlib
import logging
import os
import pkgutil
import sys
from functools import total_ordering

import ee.tools


def eprint(*args, **kwargs):
    print(*args, file=sys.stderr, **kwargs)


@total_ordering
class Tool(object):
    def __init__(self, module_name, name):
        self.module_name = module_name
        self.name = name

    def __eq__(self, other):
        return self.name == other.name

    def __lt__(self, other):
        return self.name < other.name


def find_tools():
    prefix = ee.tools.__name__ + '.'
    ps = pkgutil.walk_packages(ee.tools.__path__, prefix)
    tools = []
    for (module_loader, module_name, ispkg) in ps:
        name = module_name.replace(prefix, '').replace('_', '-')
        tools.append(Tool(module_name, name))
    return sorted(tools)


def main():
    logging.basicConfig()  # you need to initialize logging, otherwise you will not see anything from requests
    logging.getLogger().setLevel(logging.DEBUG)

    tools = find_tools()

    if len(sys.argv) <= 1:
        eprint("Available tools:")
        for t in tools:
            print("  {}".format(t.name))
        exit(1)
    name = sys.argv[1]
    del sys.argv[1]

    if os.path.isdir("py"):
        sys.path.append("py")

    for t in tools:
        if t.name != name:
            continue
        sys.argv[0] = t.name
        try:
            importlib.import_module(t.module_name)
            exit(0)
        except ee.StopToolException as e:
            if e.args:
                print("{}: {}".format(t.name, " ".join(e.args)))
            exit(1)

    eprint("No such tool: {}".format(name))
    exit(1)


if __name__ == "__main__":
    main()