// A container for test commmands, with added functions for common tasks.

import { FileInfo } from "@/FileSystem/FileInfo";
import { loadRemoteToFileInfo } from "@/Plugins/Core/RemoteMolLoaders/RemoteMolLoadersUtils";
import { getMoleculesFromStore } from "@/Store/StoreExternalAccess";
import {
    TestClick,
    TestCmdParent,
    TestText,
    TestUpload,
    TestWait,
    TestWaitUntilNotRegex,
    TestWaitUntilRegex,
    addTestsToCmdList,
    TestTourNote,
} from "./TestCommands";
import { pluginsApi } from "@/Api/Plugins";
import { messagesApi } from "@/Api/Messages";
import { expandAndShowAllMolsInTree } from "./SetupTests";
import { openRemoteFile } from "@/FileSystem/UrlOpen";
import * as StyleManager from "@/Core/Styling/StyleManager";
import { ISelAndStyle } from "@/Core/Styling/SelAndStyleInterfaces";
import { addFailingUrlSubstring } from "@/Core/Fetcher";
import { ITestCommand } from "./TestInterfaces";
import { visualizationApi } from "@/Api/Visualization";
import { loadedPlugins } from "@/Plugins/LoadedPlugins";
import { processMenuPath, IMenuPathInfo } from "@/UI/Navigation/Menu/Menu";
import { slugify } from "@/Core/Utils/StringUtils";

const examplesLoaded: string[] = [];

/**
 * A container for test commmands, with added functions for common tasks.
 */
export class TestCmdList {
    private tests: TestCmdParent[] = [];

    /**
     * Click a button as if the user had clicked it.
     *
     * @param {string}  selector              The CSS selector for the button.
     * @param {boolean} [shiftPressed=false]  Whether the shift key was pressed.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public click(selector: string, shiftPressed = false): TestCmdList {
        this.tests.push(new TestClick(selector, shiftPressed));
        return this;
    }

    /**
     * Wait for a specified number of seconds.
     *
     * @param {number} [durationInSecs=1]  The number of seconds to wait.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public wait(durationInSecs = 1): TestCmdList {
        this.tests.push(new TestWait(durationInSecs));
        return this;
    }

    /**
     * Type text into a text box.
     *
     * @param {string} selector  The CSS selector for the text box.
     * @param {string} text      The text to type.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public text(selector: string, text: string): TestCmdList {
        this.tests.push(new TestText(selector, text));
        return this;
    }

    /**
     * Wait until a given regex matches the text of an element.
     *
     * @param {string} selector  The CSS selector for the element.
     * @param {string} regex     The regex to match.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public waitUntilRegex(selector: string, regex: string): TestCmdList {
        this.tests.push(new TestWaitUntilRegex(selector, regex));
        return this;
    }

    /**
     * Wait until a given regex does not match the text of an element.
     *
     * @param {string} selector  The CSS selector for the element.
     * @param {string} regex     The regex to match.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public waitUntilNotRegex(selector: string, regex: string): TestCmdList {
        this.tests.push(new TestWaitUntilNotRegex(selector, regex));
        return this;
    }

    /**
     * Upload a file.
     *
     * @param {string} selector  The CSS selector for the file input.
     * @param {string} filePath  The path to the file to upload.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public upload(selector: string, filePath: string): TestCmdList {
        this.tests.push(new TestUpload(selector, filePath));
        return this;
    }

    /**
     * Adds a note to be displayed during an interactive tour. This has no effect
     * on automated tests.
     *
     * @param {string} message The message to display.
     * @param {string} selector The CSS selector for the element to associate the note with.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public tourNote(message: string, selector: string): TestCmdList {
        this.tests.push(new TestTourNote(selector, message));
        return this;
    }

    /**
     * Returns the list of test commands.
     *
     * @returns {ITestCommand[]} The list of test commands.
     */
    public get cmds(): ITestCommand[] {
        return this.tests.map((test: TestCmdParent) => test.cmd);
    }

    /**
     * Adds a custom style programmatically for test setup.
     *
     * @param {string} styleName The name of the style.
     * @param {ISelAndStyle} styleDefinition The style definition.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public addCustomStyle(
        styleName: string,
        styleDefinition: ISelAndStyle
    ): TestCmdList {
        StyleManager.addCustomStyle(styleName, styleDefinition, true); // Overwrite for test predictability
        return this;
    }

    /**
  * Opens a plugin programmatically by queuing clicks on the menu items.
  * This allows the plugin to be opened during the test execution sequence.
     *
     * @param {string} pluginId The ID of the plugin to open.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public openPlugin(pluginId: string): TestCmdList {
        // Previous implementation ran the plugin immediately during test construction.
        // pluginsApi.runPlugin(pluginId);

        // New implementation: Queue UI events to open the plugin.
        const plugin = loadedPlugins[pluginId];
        if (!plugin) {
            console.error(`TestCmdList: Plugin ${pluginId} not found.`);
            return this;
        }

        if (plugin.menuPath === null) {
            // If no menu path, we can't click to open it. 
            // Fallback to running it directly? Or log error?
            // Running directly works for logic but might bypass UI state checks.
            // For now, let's just run it directly if no menu path, but warn.
            console.warn(`TestCmdList: Plugin ${pluginId} has no menu path. Running directly.`);
            pluginsApi.runPlugin(pluginId);
            return this;
        }

        const menuData = processMenuPath(plugin.menuPath) as IMenuPathInfo[];
        if (!menuData) {
            return this;
        }

        const lastMenuData = menuData.pop();
        const lastSel =
            ".navbar #menu-plugin-" +
            plugin.pluginId +
            "-" +
            slugify(lastMenuData?.text as string);

        // If there are more than two items remaining in menuData, the second one is
        // a separator (not triggering an actual submenu that would require a
        // click). So remove that one.
        if (menuData.length > 1) {
            menuData.splice(1, 1);
        }

        const sels = menuData.map(
            (x, i) => ".navbar #menu" + (i + 1).toString() + "-" + slugify(x.text)
        );

        // Check if #hamburger-button is visible.
        const hamburgerButton = document.querySelector(
            "#hamburger-button"
        ) as HTMLDivElement;
        const hamburgerButtonVisible =
            hamburgerButton !== null &&
            hamburgerButton !== undefined &&
            getComputedStyle(hamburgerButton).display !== "none";

        if (hamburgerButtonVisible) {
            this.click("#hamburger-button");
        }

        // Queue the clicks
        for (const sel of sels) {
            this.click(sel);
        }
        this.wait(1); // Small wait for menu to open
        this.click(lastSel);
        this.wait(1); // Small wait for plugin to load

        return this;
    }

    /**
     * Opens a plugin with a specific payload. This bypasses the menu system.
  * Note: This still executes immediately during test construction, as there
  * is no standard UI mechanism to pass arbitrary payloads via clicks.
  * Use with caution in test sequences.
     *
     * @param {string} pluginId The ID of the plugin to open.
     * @param {any} payload The payload to pass to the plugin's onPluginStart method.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public openPluginWithPayload(pluginId: string, payload: any): TestCmdList {
        pluginsApi.runPlugin(pluginId, payload);
        return this;
    }

    /**
     * Simulates a failure for any URL containing the given substring.
     * This is executed immediately during test setup on the client.
     *
     * @param {string} substring The substring to match in the URL.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public failUrl(substring: string): TestCmdList {
        addFailingUrlSubstring(substring);
        return this;
    }

    /**
     * Adds a test to load a sample molecule (small protein and ligand) for
     * testing.
     *
     * @param {boolean} [expandInMoleculeTree=false]  Whether to expand the
     *                                                molecule tree to show the
     *                                                molecule.
     * @param {string}  [url="4WP4.pdb"]              The URL of the molecule to
     *                                                load.
     * @param {string}  [expectedTitle]               The expected title of the
     *                                                molecule in the navigator.
     *                                                If not provided, derived
     *                                                from the filename.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public loadExampleMolecule(
        expandInMoleculeTree = false,
        url = "4WP4.pdb",
        expectedTitle?: string
    ): TestCmdList {
        if (examplesLoaded.indexOf(url) !== -1) {
            // Already loaded
            return this;
        }
        examplesLoaded.push(url);
        // If its biotite, load it differently
        // If url ends in .molmoda
        if (url.endsWith(".molmoda")) {
            // Load the file
            void openRemoteFile(url);
        } else {
            const spinnerId = messagesApi.startWaitSpinner();
            void loadRemoteToFileInfo(url, false)
                .then((fileInfo: FileInfo) => {
                    return getMoleculesFromStore().loadFromFileInfo({
                        fileInfo,
                        tag: null,
                    });
                })
                .then(() => {
                    expandAndShowAllMolsInTree();
                    return visualizationApi.viewer;
                })
                .then((v) => {
                    v.zoomOnFocused();
                    return;
                })
                .catch((err: string) => {
                    messagesApi.popupError(err);
                    // throw err;
                    return;
                })
                .finally(() => {
                    messagesApi.stopWaitSpinner(spinnerId);
                });
        }
        const moleculeName = expectedTitle || (url.split("/").pop()?.split(".")[0] || "molecule");
        this.waitUntilRegex("#navigator", moleculeName);
        if (expandInMoleculeTree) {
            // If we expand, we should also wait for a common child to appear
            // to ensure the expansion has been rendered.
            this.waitUntilRegex("#navigator", "Protein");
        }
        return this;
    }

    /**
     * Adds a test to load a molecule from a SMILES string for testing.
     *
     * @param {string}  smilesString          The SMILES string of the molecule to load
     * @param {boolean} [expandInMoleculeTree=false]  Whether to expand the molecule tree
     *                                               to show the molecule
     * @param {string}  [name="molecule.smi"]  The name of the file to load.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public loadSMILESMolecule(
        smilesString: string,
        expandInMoleculeTree = false,
        name = "molecule"
    ): TestCmdList {
        if (examplesLoaded.indexOf(smilesString) !== -1) {
            // Already loaded
            return this;
        }
        examplesLoaded.push(smilesString);
        const fileInfo = new FileInfo({
            name: `${name}.smi`,
            contents: smilesString,
        });
        void getMoleculesFromStore()
            .loadFromFileInfo({
                fileInfo,
                tag: null,
            })
            .then(() => {
                expandAndShowAllMolsInTree();
                return visualizationApi.viewer;
            })
            .then((v) => {
                v.zoomOnFocused();
                return;
            })
            .catch((err: string) => {
                messagesApi.popupError(err);
                // throw err;
                return;
            });
        this.waitUntilRegex("#navigator", name);
        if (expandInMoleculeTree) {
            // SMILES molecules usually load as a single compound, but if they are complex and get split,
            // waiting for a common child might be useful. "Compound" is a good default.
            this.waitUntilRegex("#navigator", "Compound");
        }
        return this;
    }

    /**
     * If running a selenium test, this function will generate the commands to
     * expand the tree view so a given molecule is visible.
     *
     * @param {string[] | string} treeTitles  The title(s) of the molecule to
     *                                        make visible in the molecule tree.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public expandMoleculesTree(treeTitles: string[] | string): TestCmdList {
        // If treeTitles is undefined, expand everything. TODO: Should this be
        // the default behavior always?
        // if (treeTitles === undefined) {
        //     const tree = getMoleculesFromStore();
        //     tree.flattened.forEach((node) => {
        //         node.treeExpanded = true;
        //     });
        //     return this;
        // }

        // If treeTitles is not array, make it one.
        if (!Array.isArray(treeTitles)) {
            treeTitles = [treeTitles];
        }

        for (const treeTitle of treeTitles) {
            this.click(
                `#navigator div[data-label="${treeTitle}"] .expand-icon`
            );
            this.wait(0.5);
        }

        return this;
    }

    // public expandEntireMoleculesTree(): TestCmdList {
    //     const treeNodeList = getMoleculesFromStore();
    //     treeNodeList.flattened.forEach((node) => {
    //         node.treeExpanded = true;
    //         node.title = "moo";
    //     });
    //     setStoreVar("molecules", treeNodeList);
    //     return this;
    // }

    /**
     * If running a selenium test, this function will generate the command to
     * select a given molecule in the tree view.
     *
     * @param {string}  treeTitle             The title of the molecule to
     *                                        select in the molecule tree.
     * @param {boolean} [shiftPressed=false]  Whether the shift key should be
     *                                        pressed.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public selectMoleculeInTree(
        treeTitle: string,
        shiftPressed = false
    ): TestCmdList {
        this.click(
            `#navigator div[data-label="${treeTitle}"] .title-text`,
            shiftPressed
        );
        return this;
    }

    /**
     * If running a selenium test, this function will generate the command to
     * test a specific user argument.
     *
     * @param  {string} argName   The name of the specific user argument.
     * @param  {any}    argVal    The value of the specific user argument.
     * @param  {string} pluginId  The ID of the plugin.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public setUserArg(
        argName: string,
        argVal: any,
        pluginId: string
    ): TestCmdList {
        const selector = `#modal-${pluginId} #${argName}-${pluginId}-item`;

        if (typeof argVal === "string" && argVal.startsWith("file://")) {
            this.upload(selector, argVal.substring(7));
            return this;
        }

        // TODO: Add support for other types of user arguments. For example,
        // there doesn't seem to be a command for clicking checkbox below.

        if (typeof argVal === "boolean") {
            // Throw an error saying to use clicks instead.
            const msg =
                "Use clicks instead of setUserArg for boolean user arguments.";
            alert(msg);
            throw new Error(msg);

            // return {
            //     cmd: TestCommand.CheckBox,
            //     selector,
            //     data: argVal,
            // };
        }

        // TODO: Only works for text currently!
        this.text(selector, argVal);
        return this;
    }

    /**
     * Adds a test command to press a plugin (popup) button. Previously named
     * `testPressButton`.
     *
     * @param {string} selector  The css selector of the button.
     * @param {string} pluginId  The ID of the plugin.
     * @returns {TestCmdList} This TestCmdList (for chaining).
     */
    public pressPopupButton(selector: string, pluginId: string): TestCmdList {
        this.click(`#modal-${pluginId} ${selector}`);
        return this;
    }
}