import streamlit as st
import datetime
import streamlit_extras as ste
import utils


def is_valid_new_poll(poll_name):
    if len(poll_name) < 3:
        st.error("Poll name must be at least 3 characters")
        return False
    poll = utils.find_poll(poll_name)
    if poll:
        if poll["expiry"] < datetime.datetime.now():
            utils.load_polls().remove(poll)
        else:
            st.error(f"Poll {poll_name} already exists")
            return False
    return True


def is_valid_join_poll(poll_name):
    poll = utils.find_poll(poll_name)
    if poll:
        if poll["expiry"] < datetime.datetime.now():
            utils.load_polls().remove(poll)
            return False
        else:
            return True
    return False


def is_valid_admin_password(poll_name, admin_password):
    poll = utils.find_poll(poll_name)
    if poll:
        if poll["admin_password"] == admin_password:
            return True
    return False


def join_poll(poll_name, admin_password=""):
    if not is_valid_join_poll(poll_name):
        st.error(f"Invalid poll name {poll_name}")
        return
    if admin_password != "":
        if is_valid_admin_password(poll_name, admin_password):
            st.session_state["selected_poll_admin_password"] = admin_password
        elif "selected_poll_admin_password" in st.session_state:
            del st.session_state["selected_poll_admin_password"]
    st.session_state["selected_poll_name"] = poll_name
    if "poll" not in st.query_params:
        st.query_params.from_dict({"poll": poll_name})


def new_poll(poll_name, admin_password):
    if not is_valid_new_poll(poll_name):
        return
    if len(admin_password) < 8:
        st.error("Admin password must be at least 8 characters")
        return
    poll = {
        "name": poll_name,
        "admin_password": admin_password,
        "expiry": datetime.datetime.now() + datetime.timedelta(hours=3),
        "votes": {},
    }

    utils.load_polls().append(poll)
    join_poll(poll_name, admin_password)


def show_polls():
    st.write("---")
    with st.container(border=True):
        st.header("Poll list:")
        st.button("Reload Polls", use_container_width=True)

        polls = utils.load_polls()
        if len(polls) == 0:
            st.write("No polls found. You can have a better name!")
            return

        table = st.columns(3)
        with table[0]:
            st.subheader("Name")
        with table[1]:
            st.subheader("Expire in")
        with table[2]:
            st.subheader("Join Button")

        for poll in polls:
            if not is_valid_join_poll(poll["name"]):
                continue
            table = st.columns(3)
            with table[0]:
                st.write(poll["name"])
            with table[1]:
                expire_in = poll["expiry"] - datetime.datetime.now()
                formatted_time = '{:02}:{:02}'.format(expire_in.seconds // 3600, (expire_in.seconds // 60) % 60)
                st.text(formatted_time)
            with table[2]:
                st.button(
                    f"Join {poll['name']}",
                    on_click=join_poll,
                    args=(poll["name"],),
                    use_container_width=True,
                )


def show_join_poll(column):
    with column:
        with st.container(border=True):
            poll_name = st.text_input("Join Poll")
            poll_admin_password = ""
            if st.checkbox("Login as Admin", value=False):
                poll_admin_password = st.text_input(
                    "Admin Password", type="password", key="join_admin_password"
                )
            st.button(
                "Join Poll",
                type="primary",
                key="btn_join",
                use_container_width=True,
                on_click=join_poll,
                args=(poll_name, poll_admin_password),
            )


def show_new_poll(column):
    with column:
        with st.container(border=True):
            poll_name = st.text_input("Poll Name")
            poll_admin_password = st.text_input("Admin Password", type="password")
            st.button(
                "New Poll",
                type="secondary",
                key="btn_new",
                use_container_width=True,
                on_click=new_poll,
                args=(poll_name, poll_admin_password),
            )


def load():
    st.title("Audience Engagement Poll")
    st.write("Best way to measure how your audience is doing.")
    columns = st.columns(2, gap="large")
    show_new_poll(columns[0])
    show_join_poll(columns[1])
    show_polls()