// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for details.

import { Editors } from "./editors";
import { Code } from "./code";
import { QuickInput } from "./quickinput";

export class QuickAccess {

    constructor(private code: Code, private editors: Editors, private quickInput: QuickInput) { }

    public async openQuickAccess(value: string): Promise<void> {
        let retries = 0;

        // other parts of code might steal focus away from quickinput :(
        while (retries < 5) {
            if (process.platform === "darwin") {
                await this.code.dispatchKeybinding("cmd+p");
            } else {
                await this.code.dispatchKeybinding("ctrl+p");
            }

            try {
                await this.quickInput.waitForQuickInputOpened();
                break;
            } catch (err) {
                if (++retries > 5) {
                    throw err;
                }

                await this.code.dispatchKeybinding("escape");
            }
        }

        if (value) {
            await this.code.waitForSetValue(QuickInput.QUICK_INPUT_INPUT, value);
        }
    }

    public async openFile(fileName: string): Promise<void> {
        await this.openQuickAccess(fileName);

        await this.quickInput.waitForQuickInputElements(names => names[0] === fileName);
        await this.code.dispatchKeybinding("enter");
        await this.editors.waitForActiveTab(fileName);
        await this.editors.waitForEditorFocus(fileName);
    }

    public async runCommand(commandId: string): Promise<void> {
        await this.openQuickAccess(`>${commandId}`);

        // wait for best choice to be focused
        await this.code.waitForTextContent(QuickInput.QUICK_INPUT_FOCUSED_ELEMENT);

        // wait and click on best choice
        await this.quickInput.selectQuickInputElement(0);
    }

    public async openQuickOutline(): Promise<void> {
        let retries = 0;

        while (++retries < 10) {
            if (process.platform === "darwin") {
                await this.code.dispatchKeybinding("cmd+shift+o");
            } else {
                await this.code.dispatchKeybinding("ctrl+shift+o");
            }

            const text = await this.code.waitForTextContent(QuickInput.QUICK_INPUT_ENTRY_LABEL_SPAN);

            if (text !== "No symbol information for the file") {
                return;
            }

            await this.quickInput.closeQuickInput();
            await new Promise(c => setTimeout(c, 250));
        }
    }

    public async runDebugScenario(scenario: string, index?: number): Promise<void> {
        await this.openQuickAccess(`debug ${scenario}`);

        if (index) {
            for (let from = 0; from < index; from++) {
                await this.code.dispatchKeybinding("down");
            }
        }

        // wait for the best choice to be focused
        await this.code.waitForTextContent(QuickInput.QUICK_INPUT_FOCUSED_ELEMENT, scenario);

        // wait and click on the best choice
        await this.code.waitAndClick(QuickInput.QUICK_INPUT_FOCUSED_ELEMENT);
    }
}
