import os
import signal
import re
import json
import time
import copy
import traceback
import subprocess
import shlex
import threading
import hashlib

from lib.helpers import *
from lib.extension  import *

import streamlit as st

ss = st.session_state

# Load globals from the environment variables:
for x in os.environ:
    globals()[x] = os.environ[x]

hide_deploy_button()

#
#
#

ss.CONFIG_DIR = "."
ss.TOKEN_LIST = []

mkdir("user")

for p in os.scandir("user"):
    if os.path.isdir(p.path):
        ss.TOKEN_LIST.append({
            "token":        p.name,
            "create_time":  os.path.getctime(p.path)
        })

if len(ss.TOKEN_LIST) < 1:
    token       = generate_token()
    token_path  = f"user/{token}"

    mkdir(token_path)

    ss.TOKEN_LIST.append({
        "token":        token,
        "create_time":  os.path.getctime(token_path)
    })

ss.TOKEN_LIST   = sorted(ss.TOKEN_LIST, key=lambda o: sort_by_key(o, "create_time"), reverse=False)
ss.TOKEN        = ss.TOKEN_LIST[0]["token"] if len(ss.TOKEN_LIST) == 1 else None
ss.TOKEN_COOKIE = get_cookie("token")

if isinstance(ss.TOKEN_COOKIE, str):
    if len(ss.TOKEN_COOKIE) > 0:
        tokens = [i["token"] for i in ss.TOKEN_LIST]
        if ss.TOKEN_COOKIE in tokens:
            ss.TOKEN = ss.TOKEN_COOKIE

if ss.TOKEN is not None:
    for i in ss.TOKEN_LIST:
        if ss.TOKEN == i["token"]:
            ss.CONFIG_DIR = f"user/{ss.TOKEN}"
            break

ss.CHATS_DIR    = f"{ss.CONFIG_DIR}/chats"
ss.SETTINGS     = JsonFile(f"{ss.CONFIG_DIR}/settings.json", defaults={
    "fetch_reply":          True,
    "save_as":              False,
    "show_clear":           False,
    "show_undo":            True,
    "show_redo":            True,
    "show_more":            True,
    "show_fetch_button":    True,
    "show_fetch_toggle":    True
})

#
#
#

ss.PAGE_REGISTRY       = {}
ss.PAGE_REGISTRY_MAP   = {}

def register_page(category, title, fn, **kwargs):
    if category not in ss.PAGE_REGISTRY.keys():
        ss.PAGE_REGISTRY[category] = []

    if category not in ss.PAGE_REGISTRY_MAP.keys():
        ss.PAGE_REGISTRY_MAP[category] = {}

    pg = st.Page(fn, title=title, **kwargs)

    if title not in ss.PAGE_REGISTRY_MAP[category].keys():
        ss.PAGE_REGISTRY_MAP[category][title] = pg

    ss.PAGE_REGISTRY[category].append(pg)

def register_pages(category, arr, fn, **kwargs):
    for item in arr:
        kwargs_copy = copy.copy(kwargs)

        title = None
        if isinstance(item, str): title = item
        if isinstance(item, dict):
            if "title" in item.keys():
                title = item["title"]

            if "icon" in item.keys():
                kwargs_copy["icon"] = item["icon"]

        fn_name = f"{category}_{title}"
        fn_name = re.sub(r"\s+", "_", fn_name)
        fn_name = re.sub(r"[^A-Za-z0-9_]", "", fn_name)
        fn_name = fn_name.lower()

        def abc(item=item):
            fn(item)

        abc.__name__ = fn_name

        print(f"Registering {fn_name}")

        globals()[fn_name] = abc
        register_page(category, title, abc, **kwargs_copy)

#
#
#

if ss.TOKEN is None:
    st.warning("A valid API token is required to use this software.")

from views.chats_default    import *
from views.more_about       import *
from views.more_settings    import *

#
#
#

if ss.TOKEN is not None:
    mkdir(ss.CHATS_DIR)

    chats = []
    for c in os.scandir(ss.CHATS_DIR):
        if re.search(r"\.json$", c.name):
            chat_name = re.sub(r"\.json$", "", c.name)
            obj = {
                "title":        chat_name,
                "path":         c.path,
                "modify_time":  os.path.getmtime(c.path),
                "pinned":       False
            }

            with open(c.path) as f:
                chat = json.loads(f.read())

                if "pinned" in chat.keys():
                    if chat["pinned"]:
                        obj["pinned"]   = True
                        obj["icon"]     = ":material/keep:"

            chats.append(obj)

    chats = sorted(chats, key=lambda chat: sort_by_key(chat, "modify_time"), reverse=True)
    chats = sorted(chats, key=lambda chat: sort_by_key(chat, "pinned"), reverse=True)

    if len(chats) < 1:
        chats.append({
            "title":        "Untitled",
            "path":         f"{ss.CHATS_DIR}/Untitled.json",
            "modify_time":  0,
            "pinned":       False
        })

    register_pages("Chats", chats, chats_default, icon=":material/chat:")

#
#
#

register_page("More", "About", more_about, icon=":material/info:")
register_page("More", "Settings", more_settings, icon=":material/settings:")

#
#
#

st.sidebar.caption("mllm-lite by caharkness")

# Only attempt to handle redirect after all page objects exist:
handle_redirect()

pg = st.navigation(ss.PAGE_REGISTRY)
pg.run()