import React, { useCallback, useEffect, useMemo, useState } from "react";
import { useRouter } from "next/router";
import { useSnapshot } from "valtio";
import { getCookie } from "cookies-next";
import clonedeep from "lodash.clonedeep";

import PartySegmentedControl from "~components/PartySegmentedControl";
import PartyDetails from "~components/PartyDetails";
import WeaponGrid from "~components/WeaponGrid";
import SummonGrid from "~components/SummonGrid";
import CharacterGrid from "~components/CharacterGrid";

import api from "~utils/api";
import { appState, initialAppState } from "~utils/appState";
import { GridType, TeamElement } from "~utils/enums";

import "./index.scss";

// Props
interface Props {
  new?: boolean;
  team?: Party;
  raids: Raid[][];
  pushHistory?: (path: string) => void;
}

const Party = (props: Props) => {
  // Cookies
  const cookie = getCookie("account");
  const accountData: AccountCookie = cookie
    ? JSON.parse(cookie as string)
    : null;

  const headers = useMemo(() => {
    return accountData
      ? { headers: { Authorization: `Bearer ${accountData.token}` } }
      : {};
  }, [accountData]);

  // Set up router
  const router = useRouter();

  // Set up states
  const { party } = useSnapshot(appState);
  const [currentTab, setCurrentTab] = useState<GridType>(GridType.Weapon);

  // Reset state on first load
  useEffect(() => {
    const resetState = clonedeep(initialAppState);
    appState.grid = resetState.grid;
    if (props.team) storeParty(props.team);
  }, []);

  // Methods: Creating a new party
  async function createParty(extra: boolean = false) {
    let body = {
      party: {
        ...(accountData && { user_id: accountData.userId }),
        extra: extra,
      },
    };

    return await api.endpoints.parties.create(body, headers);
  }

  // Methods: Updating the party's details
  function checkboxChanged(event: React.ChangeEvent<HTMLInputElement>) {
    appState.party.extra = event.target.checked;

    if (party.id) {
      api.endpoints.parties.update(
        party.id,
        {
          party: { extra: event.target.checked },
        },
        headers
      );
    }
  }

  function updateDetails(name?: string, description?: string, raid?: Raid) {
    if (
      appState.party.name !== name ||
      appState.party.description !== description ||
      appState.party.raid?.id !== raid?.id
    ) {
      if (appState.party.id)
        api.endpoints.parties
          .update(
            appState.party.id,
            {
              party: {
                name: name,
                description: description,
                raid_id: raid?.id,
              },
            },
            headers
          )
          .then(() => {
            appState.party.name = name;
            appState.party.description = description;
            appState.party.raid = raid;
            appState.party.updated_at = party.updated_at;
          });
    }
  }

  // Deleting the party
  function deleteTeam(event: React.MouseEvent<HTMLButtonElement, MouseEvent>) {
    if (appState.party.editable && appState.party.id) {
      api.endpoints.parties
        .destroy({ id: appState.party.id, params: headers })
        .then(() => {
          // Push to route
          router.push("/");

          // Clean state
          const resetState = clonedeep(initialAppState);
          Object.keys(resetState).forEach((key) => {
            appState[key] = resetState[key];
          });

          // Set party to be editable
          appState.party.editable = true;
        })
        .catch((error) => {
          console.error(error);
        });
    }
  }

  // Methods: Storing party data
  const storeParty = function (party: Party) {
    // Store the important party and state-keeping values
    appState.party.name = party.name;
    appState.party.description = party.description;
    appState.party.raid = party.raid;
    appState.party.updated_at = party.updated_at;
    appState.party.job = party.job;
    appState.party.jobSkills = party.job_skills;

    appState.party.id = party.id;
    appState.party.extra = party.extra;
    appState.party.user = party.user;
    appState.party.favorited = party.favorited;
    appState.party.created_at = party.created_at;
    appState.party.updated_at = party.updated_at;

    // Populate state
    storeCharacters(party.characters);
    storeWeapons(party.weapons);
    storeSummons(party.summons);
  };

  const storeCharacters = (list: Array<GridCharacter>) => {
    list.forEach((object: GridCharacter) => {
      if (object.position != null)
        appState.grid.characters[object.position] = object;
    });
  };

  const storeWeapons = (list: Array<GridWeapon>) => {
    list.forEach((gridObject: GridWeapon) => {
      if (gridObject.mainhand) {
        appState.grid.weapons.mainWeapon = gridObject;
        appState.party.element = gridObject.object.element;
      } else if (!gridObject.mainhand && gridObject.position != null) {
        appState.grid.weapons.allWeapons[gridObject.position] = gridObject;
      }
    });
  };

  const storeSummons = (list: Array<GridSummon>) => {
    list.forEach((gridObject: GridSummon) => {
      if (gridObject.main) appState.grid.summons.mainSummon = gridObject;
      else if (gridObject.friend)
        appState.grid.summons.friendSummon = gridObject;
      else if (
        !gridObject.main &&
        !gridObject.friend &&
        gridObject.position != null
      )
        appState.grid.summons.allSummons[gridObject.position] = gridObject;
    });
  };

  // Methods: Navigating with segmented control
  function segmentClicked(event: React.ChangeEvent<HTMLInputElement>) {
    switch (event.target.value) {
      case "class":
        setCurrentTab(GridType.Class);
        break;
      case "characters":
        setCurrentTab(GridType.Character);
        break;
      case "weapons":
        setCurrentTab(GridType.Weapon);
        break;
      case "summons":
        setCurrentTab(GridType.Summon);
        break;
      default:
        break;
    }
  }

  // Render: JSX components
  const navigation = (
    <PartySegmentedControl
      selectedTab={currentTab}
      onClick={segmentClicked}
      onCheckboxChange={checkboxChanged}
    />
  );

  const weaponGrid = (
    <WeaponGrid
      new={props.new || false}
      weapons={props.team?.weapons}
      createParty={createParty}
      pushHistory={props.pushHistory}
    />
  );

  const summonGrid = (
    <SummonGrid
      new={props.new || false}
      summons={props.team?.summons}
      createParty={createParty}
      pushHistory={props.pushHistory}
    />
  );

  const characterGrid = (
    <CharacterGrid
      new={props.new || false}
      characters={props.team?.characters}
      createParty={createParty}
      pushHistory={props.pushHistory}
    />
  );

  const currentGrid = () => {
    switch (currentTab) {
      case GridType.Character:
        return characterGrid;
      case GridType.Weapon:
        return weaponGrid;
      case GridType.Summon:
        return summonGrid;
    }
  };

  return (
    <div>
      {navigation}
      <section id="Party">{currentGrid()}</section>
      {
        <PartyDetails
          editable={party.editable}
          updateCallback={updateDetails}
          deleteCallback={deleteTeam}
        />
      }
    </div>
  );
};

export default Party;