#!/usr/bin/env python3

# runs minetestserver using the paths defined by minetestinfo

import os
from mtanalyze.minetestinfo import *
import subprocess, signal
game_id = "ENLIVEN"
#screen -S MinetestServer $mts --gameid ENLIVEN --worldname FCAGameAWorld
print()
print()
print()

if not minetestinfo.contains("minetestserver_path"):
    print("[ mtsenliven.py ] ERROR: minetestserver_path"
          " was not found in your version of minetestinfo.py")
    exit(1)

mts = minetestinfo.get_var("minetestserver_path")
if not minetestinfo.contains("primary_world_path"):
    print("[ mtsenliven.py ] ERROR: primary_world_path"
          "was selected by minetestinfo.py")
    exit(2)
wp = minetestinfo.get_var("primary_world_path")
wn = os.path.basename(wp)
print("Using minetestserver: " + mts)
print("Using primary_world_path: " + wp)
print("Using world_name: " + wn)
print()
process = subprocess.Popen(
    [mts, '--gameid', game_id, '--worldname', wn],
    stdout=subprocess.PIPE
)
msg_flags = ["WARNING[Server]: ", "ACTION[Server]: "]
msg_lists = {}  # where flag is key
for flag in msg_flags:
    msg_lists[flag] = []
# see https://www.endpoint.com/blog/2015/01/28/getting-realtime-output-
# using-python
while True:
    try:
        output_original = process.stdout.readline()
        if output_original == '' and process.poll() is not None:
            break
        if output_original:
            output = output_original.decode("utf-8")
                    # works on python2 or 3
            output_strip = output.strip()
            # (output_original is bytes)
            show_enable = True
            found_flag = None
            f_i = None
            for flag in msg_flags:
            # such as '2018-02-06 21:08:06: WARNING[Server]: Deprecated call to get_look_yaw, use get_look_horizontal instead'
            # or 2018-02-06 21:08:05: ACTION[Server]: [playereffects] Wrote playereffects data into /home/owner/.minetest/worlds/FCAGameAWorld/playereffects.mt.
                f_i = output.find(flag)
                if f_i >= 0:
                    found_flag = flag
                    break
            if found_flag:
                sub_msg = output[f_i+len(flag):].strip()
                if sub_msg in msg_lists[found_flag]
                    show_enable = False
                else:
                    msg_lists[found_flag].append(sub_msg)
            if show_enable:
                print(output_strip)
                if found_flag is not None:
                    print("[ mtsenliven.py ] INFO: this is the last"
                          " time the message above will be shown")
        rc = process.poll()
    except KeyboardInterrupt:
        break