/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
Please see LICENSE files in the repository root for full details.
*/

import { type Locator, type Page, expect } from "@playwright/test";
import { readFile } from "node:fs/promises";
import { basename } from "node:path";
import { rejectToast, rejectToastIfExists } from "@element-hq/element-web-playwright-common";

import { Settings } from "./settings";
import { Client } from "./client";
import { Timeline } from "./timeline";
import { Spotlight } from "./Spotlight";

/**
 * A set of utility methods for interacting with the Element-Web UI.
 */
export class ElementAppPage {
    public constructor(public readonly page: Page) {}

    // We create these lazily on first access to avoid calling setup code which might cause conflicts,
    // e.g. the network routing code in the client subfixture.
    private _settings?: Settings;
    public get settings(): Settings {
        if (!this._settings) this._settings = new Settings(this.page);
        return this._settings;
    }
    private _client?: Client;
    public get client(): Client {
        if (!this._client) this._client = new Client(this.page);
        return this._client;
    }
    private _timeline?: Timeline;
    public get timeline(): Timeline {
        if (!this._timeline) this._timeline = new Timeline(this.page);
        return this._timeline;
    }

    public async cleanup() {
        await this._client?.cleanup();
    }

    /**
     * Open the top left user menu, returning a Locator to the resulting context menu.
     */
    public async openUserMenu(): Promise<Locator> {
        return this.settings.openUserMenu();
    }

    /**
     * Open room creation dialog.
     */

    public async openCreateRoomDialog(roomKindname: "New room" | "New video room" = "New room"): Promise<Locator> {
        await this.page
            .getByRole("navigation", { name: "Room list" })
            .getByRole("button", { name: "New conversation" })
            .click();
        await this.page.getByRole("menuitem", { name: roomKindname }).click();
        return this.page.locator(".mx_CreateRoomDialog");
    }

    /**
     * Close dialog currently open dialog
     */
    public async closeDialog(): Promise<void> {
        return this.settings.closeDialog();
    }

    public async getClipboard(): Promise<string> {
        return await this.page.evaluate(() => navigator.clipboard.readText());
    }

    /**
     * Get the room ID from the current URL.
     *
     * @returns The room ID.
     * @throws if the current URL does not contain a room ID.
     */
    public async getCurrentRoomIdFromUrl(): Promise<string> {
        const urlHash = await this.page.evaluate(() => window.location.hash);
        if (!urlHash.startsWith("#/room/")) {
            throw new Error("URL hash suggests we are not in a room");
        }
        return urlHash.replace("#/room/", "");
    }

    /**
     * Opens the given room by name. The room must be visible in the
     * room list and the room may contain unread messages.
     *
     * @param name The exact room name to find and click on/open.
     */
    public async viewRoomByName(name: string): Promise<void> {
        // Make sure the room list is actually present before we try closing toasts,
        // otherwise we may race with page loading
        await this.page.getByTestId("room-list").waitFor();

        const dismissToasts = async (): Promise<void> => {
            await rejectToastIfExists(this.page, "Verify this device", { timeout: 50 });
            const keyStorageToastRejected = await rejectToastIfExists(this.page, "Turn on key storage", {
                timeout: 50,
            });
            if (keyStorageToastRejected) {
                await this.page.getByRole("button", { name: "Yes, dismiss" }).click();
            }
            await rejectToastIfExists(this.page, "Notifications", { timeout: 50 });
        };

        await dismissToasts();

        // We get the room list by test-id which is a listbox and matching title=name.
        // Retry, closing toasts each time, as otherwise it can race and the toast can appear after we try to close them
        const roomTile = this.page.getByTestId("room-list").locator(`[title="${name}"]`).first();
        for (let attemptsLeft = 10; attemptsLeft > 0; attemptsLeft--) {
            try {
                await roomTile.click({ timeout: 500 });
                return;
            } catch (e) {
                if (attemptsLeft === 1) throw e;
                await dismissToasts();
            }
        }
    }

    /**
     * Opens the given room on the old room list by name. The room must be visible in the
     * room list, but the room list may be folded horizontally, and the
     * room may contain unread messages.
     *
     * @param name The exact room name to find and click on/open.
     */
    public async viewRoomByNameOnOldRoomList(name: string): Promise<void> {
        // We look for the room inside the room list, which is a tree called Rooms.
        //
        // There are 3 cases:
        // - the room list is folded:
        //     then the aria-label on the room tile is the name (with nothing extra)
        // - the room list is unfolder and the room has messages:
        //     then the aria-label contains the unread count, but the title of the
        //     div inside the titleContainer equals the room name
        // - the room list is unfolded and the room has no messages:
        //     then the aria-label is the name and so is the title of a div
        //
        // So by matching EITHER title=name OR aria-label=name we find this exact
        // room in all three cases.
        return this.page
            .getByRole("tree", { name: "Rooms" })
            .locator(`[title="${name}"],[aria-label="${name}"]`)
            .first()
            .click();
    }

    public async viewRoomById(roomId: string): Promise<void> {
        await this.page.goto(`/#/room/${roomId}`);
    }

    /**
     * Get the composer element
     * @param isRightPanel whether to select the right panel composer, otherwise the main timeline composer
     */
    public getComposer(isRightPanel?: boolean): Locator {
        const panelClass = isRightPanel ? ".mx_RightPanel" : ".mx_RoomView_body";
        return this.page.locator(`${panelClass} .mx_MessageComposer`);
    }

    /**
     * Get the composer input field
     * @param isRightPanel whether to select the right panel composer, otherwise the main timeline composer
     */
    public getComposerField(isRightPanel?: boolean): Locator {
        return this.getComposer(isRightPanel).locator("div[contenteditable]");
    }

    /**
     * Open the message composer kebab menu
     * @param isRightPanel whether to select the right panel composer, otherwise the main timeline composer
     */
    public async openMessageComposerOptions(isRightPanel?: boolean): Promise<Locator> {
        const composer = this.getComposer(isRightPanel);
        await composer.getByRole("button", { name: "More options", exact: true }).click();
        return this.page.getByRole("menu");
    }

    /**
     * Sets the files on the composers file input, causing it to open the file
     * upload dialog.
     * @param location Should the main room input or the thread view input be used.
     */
    public setComposerInputFiles(
        location: "room" | "thread",
        ...params: Parameters<Locator["setInputFiles"]>
    ): ReturnType<Locator["setInputFiles"]> {
        const input = this.page
            .locator(location === "room" ? ".mx_RoomView_body" : ".mx_RightPanel")
            .getByTestId("room-upload-context-input");
        return input.setInputFiles(...params);
    }

    /**
     * Sets the files on the composers file input, causing it to open the file
     * upload dialog, and then automaticlly submits the dialog that pops up which
     * causes the file to be uploaded.
     * @param location Should the main room input or the thread view input be used.
     */
    public async composerUploadFiles(
        location: "room" | "thread",
        ...params: Parameters<Locator["setInputFiles"]>
    ): Promise<void> {
        await this.setComposerInputFiles(location, ...params);
        await this.page.locator(".mx_Dialog").getByRole("button", { name: "Upload" }).click();
    }

    /**
     * Drags a "file" into the specified composer and automatically uploads it.
     * @param location Should the drop target the main room or the thread.
     * @param path The path to the sample file so it can be read.
     * @param type The mimetype of the file.
     */
    public async composerDragAndUploadFiles(location: "room" | "thread", path: string, type: string): Promise<void> {
        // Based on https://github.com/microsoft/playwright/issues/10667#issuecomment-2742123424
        // This read a file, encodes it into base64 and then sends it along to the page to be treated
        // as a DataTransfer (the mechanism for drag and dropped files).
        const buffer = await readFile(path);
        const name = basename(path);

        const dataTransfer = await this.page.evaluateHandle(
            async ([buffer, name, type]) => {
                const dt = new DataTransfer();
                const file = new File([Uint8Array.fromBase64(buffer)], name, {
                    type,
                });
                dt.items.add(file);
                return dt;
            },
            [buffer.toString("base64"), name, type],
        );
        await this.page.dispatchEvent(location === "room" ? ".mx_RoomView_body" : ".mx_ThreadPanel", "drop", {
            dataTransfer,
        });
        await this.page.locator(".mx_Dialog").getByRole("button", { name: "Upload" }).click();
    }

    /**
     * Paste a "file" into the specified locator and automatically uploads it.
     * @param location Should the drop target the main room or the thread.
     * @param path The path to the sample file so it can be read.
     * @param type The mimetype of the file.
     */
    public async composerDragAndPasteFile(location: "room" | "thread", path: string, type: string): Promise<void> {
        // Based on https://github.com/microsoft/playwright/issues/10667#issuecomment-2742123424
        // This read a file, encodes it into base64 and then sends it along to the page to be treated
        // as a DataTransfer (the mechanism for drag and dropped files).
        const buffer = await readFile(path);
        const name = basename(path);
        const composer = this.getComposerField(location === "thread");

        await composer.evaluate(
            async (element, [buffer, name, type]) => {
                const clipboardData = new DataTransfer();
                const file = new File([Uint8Array.fromBase64(buffer)], name, {
                    type,
                });
                clipboardData.items.add(file);
                element.dispatchEvent(
                    new ClipboardEvent("paste", {
                        clipboardData,
                        bubbles: true,
                        cancelable: true,
                    }),
                );
            },
            [buffer.toString("base64"), name, type],
        );
        await this.page.locator(".mx_Dialog").getByRole("button", { name: "Upload" }).click();
    }

    /**
     * Returns the space panel space button based on a name. The space
     * must be visible in the space panel
     * @param name The space name to find
     */
    public async getSpacePanelButton(name: string): Promise<Locator> {
        const button = this.page.getByRole("button", { name: name });
        await expect(button).toHaveClass(/mx_SpaceButton/);
        return button;
    }

    /**
     * Opens the given space home by name. The space must be visible in
     * the space list.
     * @param name The space name to find and click on/open.
     */
    public async viewSpaceHomeByName(name: string): Promise<void> {
        const button = await this.getSpacePanelButton(name);
        return button.dblclick();
    }

    /**
     * Opens the given space by name. The space must be visible in the
     * space list.
     * @param name The space name to find and click on/open.
     */
    public async viewSpaceByName(name: string): Promise<void> {
        const button = await this.getSpacePanelButton(name);
        return button.click();
    }

    public async openSpotlight(): Promise<Spotlight> {
        const spotlight = new Spotlight(this.page);
        await spotlight.open();
        return spotlight;
    }

    /**
     * Opens/closes the room info panel
     * @returns locator to the right panel
     */
    public async toggleRoomInfoPanel(): Promise<Locator> {
        await this.page.getByRole("button", { name: "Room info" }).first().click();
        return this.page.locator(".mx_RightPanel");
    }

    /**
     * Opens the room info panel if it is not already open.
     *
     * TODO: fix this so that it works correctly if, say, the member list was open instead of the room info panel.
     *
     * @returns locator to the right panel
     */
    public async openRoomInfoPanel(): Promise<Locator> {
        const locator = this.page.getByTestId("right-panel");
        if (!(await locator.isVisible())) {
            await this.page.getByRole("button", { name: "Room info" }).first().click();
        }
        return locator;
    }

    /**
     * Opens/closes the memberlist panel
     * @returns locator to the memberlist panel
     */
    public async toggleMemberlistPanel(): Promise<Locator> {
        const locator = this.page.locator(".mx_FacePile");
        await locator.click();
        const memberlist = this.page.locator(".mx_MemberListView");
        await memberlist.waitFor();
        return memberlist;
    }

    /**
     * Open the room info panel, and use it to send an invite to the given user.
     *
     * @param userId - The user to invite to the room.
     * @param options - Options object
     */
    public async inviteUserToCurrentRoom(
        userId: string,
        options?: {
            /** If true, expect and acknowledge "Confirm inviting new users" page */
            confirmUnknownUser?: boolean;
        },
    ): Promise<void> {
        const rightPanel = await this.openRoomInfoPanel();
        await rightPanel.getByRole("menuitem", { name: "Invite" }).click();

        const dialogLocator = this.page.getByRole("dialog");
        const input = dialogLocator.getByTestId("invite-dialog-input");
        await input.fill(userId);
        await input.press("Enter");
        await dialogLocator.getByRole("button", { name: "Invite" }).click();

        if (options?.confirmUnknownUser) {
            await expect(
                dialogLocator.getByRole("heading", { name: "Invite new contacts to this room?" }),
            ).toBeVisible();
            await dialogLocator.getByRole("button", { name: "Invite" }).click();
        }
    }

    /**
     * Dismiss the "Turn on key storage" toast and dismiss the confirmation
     * dialog.
     *
     * Note: to dismiss normal toasts, use the {@link rejectToast} function
     * directly.
     */
    public async closeKeyStorageToast() {
        await rejectToast(this.page, "Turn on key storage");
        await this.page.getByRole("button", { name: "Yes, dismiss" }).click();
    }

    /**
     * Scroll an infinite list to the bottom.
     * @param list The element to scroll
     */
    public async scrollListToBottom(list: Locator): Promise<void> {
        // First hover the mouse over the element that we want to scroll
        await list.hover();

        const needsScroll = async () => {
            // From https://developer.mozilla.org/en-US/docs/Web/API/Element/scrollHeight#determine_if_an_element_has_been_totally_scrolled
            const fullyScrolled = await list.evaluate(
                (e) => Math.abs(e.scrollHeight - e.clientHeight - e.scrollTop) <= 1,
            );
            return !fullyScrolled;
        };

        // Scroll the element until we detect that it is fully scrolled
        do {
            await this.page.mouse.wheel(0, 1000);
        } while (await needsScroll());
    }
}