#!/usr/bin/env python

from collections import defaultdict
from datetime import datetime
from typing import Annotated, Any

import arcticdb as adb
import pandas as pd
from fastapi import APIRouter, Path
from nicegui import app, ui

from auth.login import router as login_router
from auth.logout import logout
from auth.mw import AuthMiddleware
from auth.secret import get_secret

from aggridx import aggridx
from registry import Registry


app.include_router(login_router)
app.add_middleware(AuthMiddleware)


PGroup = Annotated[str, Path(pattern=r"^p\d{5}$")]


uri = "lmdb://adb"
ac = adb.Arctic(uri)

lib = ac.get_library(
    "stand",
    create_if_missing=True,
    library_options=adb.LibraryOptions(dynamic_schema=True)
)


router = APIRouter()
grids = defaultdict(Registry)


OPTIONS = {
    ":getRowId": "(params) => params.data.index", # set row ID to index column
    "context": {"pgroup": None},
    "defaultColDef": {
        "filter": True,
        "editable": True,
        "sortable": True,
        "resizable": True
    },
    "pagination": True,
    "paginationAutoPageSize": True,
    "theme": "balham"
}


def update_adb(evt):
    if evt.args.get("source") != "edit":
        # ignore event if it was no direct edit
        return

    pgroup = evt.args["context"]["pgroup"]
    row_id = evt.args["rowId"]
    col_id = evt.args["colId"]
    new_val = evt.args["newValue"]

    index = datetime.fromisoformat(row_id) # nicegui converts datetime to str
    df = lib.read(pgroup, date_range=[index]).data
    df.at[index, col_id] = new_val
    lib.update(pgroup, df)


def update_grids(evt):
    sender = evt.sender
    pgroup = evt.args["context"]["pgroup"]
    row_index = evt.args["rowIndex"]
    row_id = evt.args["rowId"]
    col_id = evt.args["colId"]
    new_val = evt.args["newValue"]

    for grid in grids[pgroup]:
        grid.set_cell_server(row_index, col_id, new_val)
        if grid == sender:
            # the sender is already up-to-date
            continue
        grid.set_cell_client(row_id, col_id, new_val)


@ui.page("/")
def main():
    with ui.column().classes("absolute-center items-center"):
        username = app.storage.user.get("username", "unknown user")
        ui.label(f"Hello {username}!").classes("text-2xl")
        ui.button("log out", icon="logout", on_click=logout)

        pgroups = app.storage.user.get("pgroups", set())
        ui.select(
            label="pgroup",
            options=sorted(pgroups),
            with_input=True,
            on_change=lambda e: ui.navigate.to(f"/tables/{e.value}")
        )


@ui.page("/tables/{pgroup}")
def table(pgroup: PGroup):
    pgroups = app.storage.user.get("pgroups", set())
    if pgroup in pgroups:
        table_show(pgroup)
    else:
        table_deny(pgroup)


def table_show(pgroup):
#    with ui.left_drawer(value=False) as ld:
#        dark = ui.dark_mode(value=True)
#        ui.switch("dark mode").bind_value(dark)

#    with ui.page_sticky(position="left", x_offset=-12.5):
#        def cb():
#            ld.toggle()
#            btn.icon = "sym_o_left_panel_close" if ld.value else "sym_o_left_panel_open"
#        btn = ui.button(icon="sym_o_left_panel_open", on_click=cb).props("flat dense")

    try:
        df = lib.read(pgroup).data
    except adb.exceptions.NoSuchVersionException:
        df = pd.DataFrame()

    df = df.reset_index()

    options = OPTIONS.copy()
    options["context"]["pgroup"] = pgroup

    grid = aggridx.from_pandas(df, options=options)
    grid.classes("h-[calc(100vh-2rem)]") # full height minus padding
    grid.on("cellValueChanged", update_adb)
    grid.on("cellValueChanged", update_grids)
    grids[pgroup].add(grid)


def table_deny(pgroup):
    with ui.column().classes("absolute-center items-center gap-8"):
        ui.icon("sym_o_front_hand", size="xl")
        ui.label(f"access to {pgroup} denied").classes("text-2xl")


@router.post("/tables/{pgroup}/append")
def append(pgroup: PGroup, row: dict[str, Any]):
    now = datetime.now()

    df = pd.DataFrame(row, index=[now])
    lib.append(pgroup, df)

    now = str(now) # nicegui converts datetime to str
    row = {"index": now, **row} # setdefault would not force index to be the first column

    res = []
    for grid in grids[pgroup]:
        grid.append(row)
        res.append(grid.options)

    return res


app.include_router(router)

ui.run(title="stand", favicon="favicon.png", storage_secret=get_secret(), fastapi_docs=True, dark=True, show=False)