import { formatCompact, type BlitzkitStats } from "@blitzkit/core";
import { Table } from "@radix-ui/themes";
import { times } from "lodash-es";
import {
  Fragment,
  Suspense,
  useCallback,
  useEffect,
  useMemo,
  useState,
} from "react";
import usePromise from "react-promise-suspense";
import { awaitableAverageDefinitions } from "../../core/awaitables/averageDefinitions";
import { awaitableTankDefinitions } from "../../core/awaitables/tankDefinitions";
import { filterTanks } from "../../core/blitzkit/filterTanks";
import { useAveragesExclusionRatio } from "../../hooks/useAveragesExclusionRatio";
import { useLocale } from "../../hooks/useLocale";
import { Performance } from "../../stores/performance";
import { TankFilters } from "../../stores/tankFilters";
import { TankPerformanceSort } from "../../stores/tankPerformanceSort";
import type { MaybeSkeletonComponentProps } from "../../types/maybeSkeletonComponentProps";
import { StickyRowHeaderCell } from "../StickyRowHeaderCell";
import { RowLoader } from "./RowLoader";
import { TankRow } from "./TankRow";

const PREVIEW_COUNT = 10;
const DEFAULT_LOADED_ROWS = 25;

const [tankDefinitions, averageDefinitions] = await Promise.all([
  awaitableTankDefinitions,
  awaitableAverageDefinitions,
]);

const tankList = Object.values(tankDefinitions.tanks);

export function Tanks({ skeleton }: MaybeSkeletonComponentProps) {
  if (skeleton) {
    return (
      <Table.Body>
        {times(16, (index) => (
          <RowLoader key={index} />
        ))}
      </Table.Body>
    );
  }

  const sort = TankPerformanceSort.use();
  const filters = TankFilters.use();
  const filteredTanks = usePromise(
    () =>
      filterTanks(filters, tankList).then((tanks) =>
        tanks.filter(({ id }) => id in averageDefinitions.averages)
      ),
    // react-promise-suspense has awful type annotations
    [filters] as any
  );
  const tanksMapped = useMemo(
    () =>
      filteredTanks.map(({ id }) => ({
        id,
        ...averageDefinitions.averages[id],
      })),
    [filters]
  );
  const tanksSorted = useMemo(() => {
    const { playerCountPeriod } = Performance.state;

    switch (sort.type) {
      case "accuracy":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction * (a.mu.hits / a.mu.shots - b.mu.hits / b.mu.shots)
        );
      case "capture_points":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.capture_points / a.mu.battles -
              b.mu.capture_points / b.mu.battles)
        );
      case "damage":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.damage_dealt / a.mu.battles -
              b.mu.damage_dealt / b.mu.battles)
        );
      case "damage_ratio":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.damage_dealt / a.mu.damage_received -
              b.mu.damage_dealt / b.mu.damage_received)
        );
      case "damage_taken":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.damage_received / a.mu.battles -
              b.mu.damage_received / b.mu.battles)
        );
      case "hits":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.hits / a.mu.battles - b.mu.hits / b.mu.battles)
        );
      case "kills":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.frags / a.mu.battles - b.mu.frags / b.mu.battles)
        );
      case "shots":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.shots / a.mu.battles - b.mu.shots / b.mu.battles)
        );
      case "players":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.samples[playerCountPeriod] - b.samples[playerCountPeriod])
        );
      case "spots":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.spotted / a.mu.battles - b.mu.spotted / b.mu.battles)
        );
      case "survival":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.survived_battles / a.mu.battles -
              b.mu.survived_battles / b.mu.battles)
        );
      case "winrate":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction *
            (a.mu.wins / a.mu.battles - b.mu.wins / b.mu.battles)
        );
      case "xp":
        return tanksMapped.sort(
          (a, b) =>
            sort.direction * (a.mu.xp / a.mu.battles - b.mu.xp / b.mu.battles)
        );
    }
  }, [filters, sort]);
  const [loadedRows, setLoadedRows] = useState(DEFAULT_LOADED_ROWS);

  useEffect(() => {
    setLoadedRows(DEFAULT_LOADED_ROWS);
  }, [filters, sort]);

  const playerCountPeriod = Performance.use((state) => state.playerCountPeriod);
  const { strings, locale } = useLocale();
  const ratio = useAveragesExclusionRatio();
  const sum = useCallback(
    (slice: (tank: BlitzkitStats) => number) => {
      return tanksSorted.reduce(
        (acc, tank) => acc + tank.samples[playerCountPeriod] * slice(tank.mu),
        0
      );
    },
    [tanksSorted]
  );

  const battles = sum(({ battles }) => battles);
  const winrate = sum(({ wins }) => wins) / battles;
  const damage = sum(({ damage_dealt }) => damage_dealt) / battles;
  const survival = sum(({ survived_battles }) => survived_battles) / battles;
  const xp = sum(({ xp }) => xp) / battles;
  const kills = sum(({ frags }) => frags) / battles;
  const spots = sum(({ spotted }) => spotted) / battles;
  const hits = sum(({ hits }) => hits) / battles;
  const shots = sum(({ shots }) => shots) / battles;
  const accuracy = hits / shots;
  const damageReceived =
    sum(({ damage_received }) => damage_received) / battles;
  const damageRatio = damage / damageReceived;
  const capturePoints = sum(({ capture_points }) => capture_points) / battles;

  const average = {
    battles,
    winrate,
    damage,
    survival,
    xp,
    kills,
    spots,
    hits,
    shots,
    accuracy,
    damageReceived,
    damageRatio,
    capturePoints,
  };

  return (
    <Table.Body>
      <Table.Row>
        <StickyRowHeaderCell style={{ overflow: "hidden", display: "flex" }}>
          {strings.website.tools.performance.table.tanks.total}
        </StickyRowHeaderCell>
        <Table.Cell align="center">{(winrate * 100).toFixed(1)}%</Table.Cell>
        <Table.Cell align="center">
          {formatCompact(
            locale,
            ratio * averageDefinitions.samples[playerCountPeriod]
          )}
        </Table.Cell>
        <Table.Cell align="center">
          {Math.round(damage).toLocaleString(locale)}
        </Table.Cell>
        <Table.Cell align="center">
          {Math.round(survival * 100).toFixed(1)}%
        </Table.Cell>
        <Table.Cell align="center">
          {Math.round(xp).toLocaleString(locale)}
        </Table.Cell>
        <Table.Cell align="center">{kills.toFixed(2)}</Table.Cell>
        <Table.Cell align="center">{spots.toFixed(2)}</Table.Cell>
        <Table.Cell align="center">{(accuracy * 100).toFixed(0)}%</Table.Cell>
        <Table.Cell align="center">{shots.toFixed(1)}</Table.Cell>
        <Table.Cell align="center">{hits.toFixed(1)}</Table.Cell>
        <Table.Cell align="center">{damageRatio.toFixed(2)}</Table.Cell>
        <Table.Cell align="center">
          {Math.round(damageReceived).toLocaleString(locale)}
        </Table.Cell>
        <Table.Cell align="center">{capturePoints.toFixed(2)}</Table.Cell>
      </Table.Row>

      {tanksSorted.slice(0, loadedRows).map((averages) => {
        const tank = tankDefinitions.tanks[averages.id];

        if (tank === undefined) return null;

        return (
          <Fragment key={tank.id}>
            <Suspense fallback={<RowLoader />}>
              <TankRow average={average} tank={tank} />
            </Suspense>
          </Fragment>
        );
      })}

      {times(
        Math.min(PREVIEW_COUNT, tanksSorted.length - loadedRows),
        (index) => {
          return (
            <RowLoader
              key={index}
              onIntersection={() => {
                setLoadedRows((state) =>
                  Math.min(state + 2, tanksSorted.length)
                );
              }}
            />
          );
        }
      )}
    </Table.Body>
  );
}