#!/usr/bin/python3
import sys
import argparse
import subprocess
import os
import importlib.machinery

import generate
import util

class BuiltinActions:
    @staticmethod
    def generate(*args):
        generate.main(["--config", config_path, *args])
    
    @staticmethod
    def external(*args):
        subprocess.run(args, check=True)

def dispatch(action, args=[]):
    if package_actions and action in dir(package_actions):
        getattr(package_actions, action)(config, *args)
    elif action in dir(BuiltinActions):
        getattr(BuiltinActions, action)(*args)
    elif action in config["sequencer"]:
        for item in config["sequencer"][action]:
            ilist = item.split()
            if not ilist[0] in cliargs.skip:
                dispatch(ilist[0], ilist[1:])
    else:
        raise ValueError(f"Action {action} not found")

if __name__ == "__main__":
    commandname = sys.argv[0].split("/")[-1]
    using_alias = commandname != "sequencer.py"

    parser = argparse.ArgumentParser()
    parser.add_argument("--config", "-c", default=util.CONFIG_FILE)
    parser.add_argument("--skip", action='append')
    if not using_alias:
        parser.add_argument("action", nargs="?")
    cliargs = parser.parse_args()

    if cliargs.skip is None:
        cliargs.skip = []

    config_path = util.get_normalized_config_path(cliargs.config)
    config_path = os.path.abspath(config_path)

    original_working_dir = os.getcwd()
    normalized_working_dir = original_working_dir

    if os.path.dirname(config_path) != "":
        normalized_working_dir = os.path.dirname(config_path)
    os.chdir(normalized_working_dir)

    config = util.get_config(config_path)

    package_actions = None
    if "package_actions_file" in config:
        package_actions = importlib.machinery.SourceFileLoader("package_actions",config["package_actions_file"]).load_module()

    if using_alias:
        dispatch(commandname)
    elif cliargs.action:
        dispatch(cliargs.action)
    else:
        print("No action specified")
        sys.exit(1)