#!/usr/bin/python3

# This file is part of PlomRogue. PlomRogue is licensed under the GPL version 3
# or any later version. For details on its copyright, license, and warranties,
# see the file NOTICE in the root directory of the PlomRogue source package.


def replay_game():
    """Replay game from record file.

    Use opts.replay as breakpoint turn to which to replay automatically before
    switching to manual input by non-meta commands in server input file
    triggering further reads of record file. Ensure opts.replay is at least 1.
    Run try_worldstate_update() before each interactive obey()/read_command().
    """
    if opts.replay < 1:
        opts.replay = 1
    print("Replay mode. Auto-replaying up to turn " + str(opts.replay) +
          " (if so late a turn is to be found).")
    if not os.access(io_db["path_record"], os.F_OK):
        raise SystemExit("No record file found to replay.")
    io_db["file_record"] = open(io_db["path_record"], "r")
    io_db["file_record"].prefix = "record file line "
    io_db["file_record"].line_n = 1
    while world_db["TURN"] < opts.replay:
        line = io_db["file_record"].readline()
        if "" == line:
            break
        obey(line.rstrip(), io_db["file_record"].prefix
             + str(io_db["file_record"].line_n))
        io_db["file_record"].line_n = io_db["file_record"].line_n + 1
    while True:
        try_worldstate_update()
        obey(read_command(), "in file", replay=True)


def play_game():
    """Play game by server input file commands. Before, load save file found.

    If no save file is found, a new world is generated from the commands in the
    world config plus a 'MAKE WORLD [current Unix timestamp]'. Record this
    command and all that follow via the server input file. Run
    try_worldstate_update() before each interactive obey()/read_command().
    """
    import time
    from server.io import obey_lines_in_file
    if os.access(io_db["path_save"], os.F_OK):
        obey_lines_in_file(io_db["path_save"], "save")
    else:
        if not os.access(opts.worldconf, os.F_OK):
            msg = "No world config file from which to start a new world."
            raise SystemExit(msg)
        obey_lines_in_file(opts.worldconf, "world config ", do_record=True)
        obey("MAKE_WORLD " + str(int(time.time())), "in file", do_record=True)
    while True:
        try_worldstate_update()
        obey(read_command(), "in file", do_record=True)


from server.io import cleanup_server_io
try:
    from server.utils import opts
    from server.config.io import io_db
    if opts.savefile:
        io_db["path_save"] = opts.savefile
        io_db["path_record"] = "record_" + opts.savefile
    from server.io import setup_server_io
    setup_server_io()
    if opts.verbose:
        io_db["verbose"] = True
    import os
    from server.config.world_data import world_db
    from server.io import read_command, try_worldstate_update, obey
    if None != opts.replay:
        replay_game()
    else:
        play_game()
except SystemExit as exit:
    if len(exit.args) < 2 and exit.args[0] != 0:
        print("ABORTING: " + str(exit.args[0]))
except:
    print("SOMETHING WENT WRONG IN UNEXPECTED WAYS")
    raise
finally:
    cleanup_server_io()