import {
	type API_HA_DeskPosition,
	BaseService,
	type ComponentUpdate,
	createComponentUpdate,
	type FullInformation,
	type GristRecord_PersonalGoals,
	type HomeAssistantDeskPositionResult,
	type ServiceResult,
	StatsComponent,
	type TidalGetCurrent,
	type WsService,
} from "@dpu/shared";
import { logInfo, logWarning } from "@dpu/shared/dist/logger.js";
import { DateTime } from "luxon";
import type { WebSocket } from "ws";
import type { GristService } from "../grist/service";
import type { HomeAssistantService } from "../homeassistant/service";
import type { TidalService } from "../tidal/service";

export class HomepageService extends BaseService<null> {
	private gristService: GristService;
	private haService: HomeAssistantService;
	private tidalService: TidalService;
	private wsService: WsService;
	private lastPoll: FullInformation = {
		ha_desk_position: null,
		ha_temp: null,
		tidal_current: null,
		grist_personal_goals: null,
	};

	constructor(
		gristService: GristService,
		haService: HomeAssistantService,
		tidalService: TidalService,
		wsService: WsService,
	) {
		super(null);
		this.gristService = gristService;
		this.haService = haService;
		this.tidalService = tidalService;
		this.wsService = wsService;
	}

	scheduleMidnightGristUpdate(): void {
		const now = DateTime.now().setZone("Europe/Berlin");
		const nextMidnight = now.plus({ days: 1 }).startOf("day");

		setTimeout(async () => {
			await this.fetchAndBroadcastGrist();
			this.scheduleMidnightGristUpdate();
		}, nextMidnight.diff(now).toMillis());
	}

	private async fetchAndBroadcastGrist(): Promise<void> {
		try {
			if (this.wsService.getClientCount() > 0) {
				const updates: ComponentUpdate[] = [];
				this.updateGristPG(await this._getGristPG(), updates);

				if (updates.length > 0) {
					this.wsService.broadcast({
						type: "update",
						data: updates,
					});
				}
			}
		} catch (error) {
			logWarning("Error fetching midnight Grist update", error);
		}
	}

	async sendFullInformationToSocket(socket: WebSocket): Promise<void> {
		try {
			const [desk, temp, tidal, personal_goals] = await this._getAll();
			const updates: ComponentUpdate[] = [
				createComponentUpdate(StatsComponent.HA_DESK_POSITION, desk),
				createComponentUpdate(StatsComponent.HA_TEMP, temp),
				createComponentUpdate(StatsComponent.TIDAL_CURRENT, tidal),
				createComponentUpdate(
					StatsComponent.GRIST_PERSONAL_GOALS,
					personal_goals,
				),
			];
			socket.send(
				JSON.stringify({
					type: "update",
					data: updates,
				}),
			);
		} catch (error) {
			logWarning("error getting all information for socket update.", error);
		}
	}

	async getFullInformation(): Promise<ServiceResult<FullInformation | string>> {
		try {
			const [desk, temp, tidal, personal_goals] = await this._getAll();

			return this.getSuccessfulResult(
				this.updateFull({
					ha_desk_position: desk as API_HA_DeskPosition,
					ha_temp: temp as string,
					tidal_current: tidal as TidalGetCurrent,
					grist_personal_goals: personal_goals as GristRecord_PersonalGoals,
				}),
			);
		} catch (error) {
			return this.getErrorResult("error getting all information.", error);
		}
	}

	private async _getAll(): Promise<Iterable<unknown>> {
		return await Promise.all([
			this._getDesk(),
			this._getTemp(),
			this._getTidal(),
			this._getGristPG(),
		]);
	}

	private async _getDesk(): Promise<API_HA_DeskPosition | null> {
		const desk = await this.haService.getDeskPosition();
		return desk.successful
			? this.haService.convertPosResultToApiAnswer(
					desk.result as HomeAssistantDeskPositionResult,
				)
			: null;
	}

	private async _getTemp(): Promise<string | null> {
		const temp = await this.haService.getTemperature();
		return temp.successful ? temp.result : null;
	}

	private async _getTidal(): Promise<TidalGetCurrent | null> {
		const tidal = await this.tidalService.getSong();
		return tidal ? (tidal.result as TidalGetCurrent) : null;
	}

	private async _getGristPG(): Promise<GristRecord_PersonalGoals | null> {
		const personal_goals = await this.gristService.getToday();
		return personal_goals.successful
			? (personal_goals.result as GristRecord_PersonalGoals)
			: null;
	}

	updateFull(newPoll: FullInformation): FullInformation {
		const updates: ComponentUpdate[] = [];

		this.updateHaDesk(newPoll.ha_desk_position, updates);
		this.updateHaTemp(newPoll.ha_temp, updates);
		this.updateTidal(newPoll.tidal_current, updates);
		this.updateGristPG(newPoll.grist_personal_goals, updates);

		if (updates.length > 0) {
			logInfo("Updating clients");
			this.wsService.broadcast({
				type: "update",
				data: updates,
			});
		}

		return newPoll;
	}

	async updatePartial(
		components: ComponentUpdate[],
	): Promise<ServiceResult<string>> {
		const updates: ComponentUpdate[] = [];
		for (const component of components) {
			switch (component.component) {
				case StatsComponent.HA_DESK_POSITION: {
					this.updateHaDesk(
						(component.data as API_HA_DeskPosition) ?? (await this._getDesk()),
						updates,
					);
					break;
				}
				case StatsComponent.HA_TEMP:
					this.updateHaTemp(
						(component.data as string) ?? (await this._getTemp()),
						updates,
					);
					break;
				case StatsComponent.TIDAL_CURRENT:
					this.updateTidal(
						(component.data as TidalGetCurrent) ?? (await this._getTidal()),
						updates,
					);
					break;
				case StatsComponent.GRIST_PERSONAL_GOALS:
					this.updateGristPG(
						(component.data as GristRecord_PersonalGoals) ??
							(await this._getGristPG()),
						updates,
					);
					break;
				default:
			}
		}

		this.wsService.broadcast({
			type: "update",
			data: updates,
		});

		return this.getSuccessfulResult("update broadcasted");
	}

	updateHaDesk(
		new_ha_desk_position: API_HA_DeskPosition | null,
		updates: ComponentUpdate[],
	): void {
		if (
			this.lastPoll.ha_desk_position?.is_standing !==
			new_ha_desk_position?.is_standing
		) {
			this.lastPoll.ha_desk_position = new_ha_desk_position;
			updates.push(
				createComponentUpdate(
					StatsComponent.HA_DESK_POSITION,
					new_ha_desk_position,
				),
			);
		}
	}

	updateHaTemp(new_ha_temp: string | null, updates: ComponentUpdate[]): void {
		if (this.lastPoll.ha_temp !== new_ha_temp) {
			this.lastPoll.ha_temp = new_ha_temp;
			updates.push(createComponentUpdate(StatsComponent.HA_TEMP, new_ha_temp));
		}
	}

	updateTidal(
		new_tidal_current: TidalGetCurrent | null,
		updates: ComponentUpdate[],
	): void {
		if (
			this.lastPoll.tidal_current?.title !== new_tidal_current?.title ||
			this.lastPoll.tidal_current?.artists !== new_tidal_current?.artists ||
			this.lastPoll.tidal_current?.status !== new_tidal_current?.status ||
			this.lastPoll.tidal_current?.volume !== new_tidal_current?.volume
		) {
			this.lastPoll.tidal_current = new_tidal_current;
			updates.push(
				createComponentUpdate(StatsComponent.TIDAL_CURRENT, new_tidal_current),
			);
		}
	}

	updateGristPG(
		new_grist_personal_goals: GristRecord_PersonalGoals | null,
		updates: ComponentUpdate[],
	): void {
		if (
			this.lastPoll.grist_personal_goals?.went_outside !==
				new_grist_personal_goals?.went_outside ||
			this.lastPoll.grist_personal_goals?.standing !==
				new_grist_personal_goals?.standing ||
			this.lastPoll.grist_personal_goals?.steps !==
				new_grist_personal_goals?.steps ||
			this.lastPoll.grist_personal_goals?.pushups !==
				new_grist_personal_goals?.pushups ||
			this.lastPoll.grist_personal_goals?.squats !==
				new_grist_personal_goals?.squats ||
			this.lastPoll.grist_personal_goals?.leg_raises !==
				new_grist_personal_goals?.leg_raises ||
			this.lastPoll.grist_personal_goals?.stairs !==
				new_grist_personal_goals?.stairs
		) {
			this.lastPoll.grist_personal_goals = new_grist_personal_goals;
			updates.push(
				createComponentUpdate(
					StatsComponent.GRIST_PERSONAL_GOALS,
					new_grist_personal_goals,
				),
			);
		}
	}
}