import * as CommandProcessor from "./CommandProcessor.js";
import { UserSettings } from "./UserSettings.js";
import * as Utilities from "./Utilities.js";
import { Store } from "./Store.js";
import { ConsoleCommand } from "./Models/ConsoleCommand.js";
import { CommandLineParameter } from "./Models/CommandLineParameter.js";
import { WebCommands } from "./Commands/WebCommands.js";
import { Parameter } from "./Models/Parameter.js";
import { Main } from "./Main.js";
import * as UI from "./UI.js"

var commandCompletionDisplayTimeout;

export function DisplayCommandCompletions(commands: Array<ConsoleCommand>, relevantText:string) {
    window.clearTimeout(commandCompletionDisplayTimeout);
    commandCompletionDisplayTimeout = window.setTimeout(() => {
        commands.forEach(x => {
            var commandCompletionItem = document.createElement("div");
            commandCompletionItem.classList.add("command-completion-item");
            commandCompletionItem.innerHTML = x.Name;
            commandCompletionItem.onclick = function (e) {
                var commandText = UI.ConsoleTextArea.value;
                var insertCommandStart = commandText.lastIndexOf(relevantText);
                UI.ConsoleTextArea.value = commandText.substring(0, insertCommandStart) + commandCompletionItem.innerHTML;
                UI.CommandCompletionDiv.classList.add("hidden");
                UI.CommandInfoDiv.classList.add("hidden");
            };
            commandCompletionItem.onfocus = function (e) {
                ShowCommandInfo(x);
            }
            UI.CommandCompletionDiv.appendChild(commandCompletionItem);
        });

        if (commands.length > 0) {
            var currentText = UI.ConsoleTextArea.value.toLowerCase();
            if (commands.some(x => x.Name.toLowerCase().startsWith(currentText))) {
                Store.CommandCompletionPosition = commands.findIndex(x => x.Name.toLowerCase().startsWith(currentText));
            }
            UI.CommandCompletionDiv.classList.remove("hidden");
            HighlightCompletionWindowItem(Store.CommandCompletionPosition);
            ShowCommandInfo(commands[Store.CommandCompletionPosition]);
            PositionCommandCompletionWindow();
        }
    }, Math.min(commands.length, 1000));
}
export function DisplayParameterCompletions(command: ConsoleCommand, parameters: CommandLineParameter[], commandText: string) {
    if (parameters.length > 0 && !parameters.some(x => x.Value.length == 0) && !commandText.endsWith("-")) {
        return;
    }
    UI.CommandCompletionDiv.classList.remove("hidden");

    var remainingParams = command.Parameters.filter(x => !parameters.some(y =>
        y.Name.toLowerCase() == x.Name.toLowerCase() &&
        y.Value.length > 0))
        .filter(x => x.Name.toLowerCase()
            .startsWith(UI.ConsoleTextArea.value.substring(UI.ConsoleTextArea.value.lastIndexOf("-") + 1).toLowerCase())
        );

    remainingParams.forEach(param => {
        var commandCompletionItem = document.createElement("div");
        commandCompletionItem.classList.add("command-completion-item");
        commandCompletionItem.innerHTML = param.Name;
        commandCompletionItem.onclick = function (e: MouseEvent) {
            var preParam = UI.ConsoleTextArea.value.substring(0, UI.ConsoleTextArea.value.lastIndexOf(" "));
            UI.ConsoleTextArea.value = preParam.trim() + ` -${commandCompletionItem.innerText}`;
            UI.CommandCompletionDiv.classList.add("hidden");
            UI.CommandInfoDiv.classList.add("hidden");
        };
        commandCompletionItem.onfocus = function (e) {
            ShowParameterInfo(param);
        }
        UI.CommandCompletionDiv.appendChild(commandCompletionItem);
    });
    if (!UI.CommandCompletionDiv.classList.contains("hidden") && remainingParams.length > 0) {
        SetCommandCompletionPositionToIncompleteParam(parameters);
        HighlightCompletionWindowItem(Store.CommandCompletionPosition);
        ShowParameterInfo(remainingParams[Store.CommandCompletionPosition]);
        PositionCommandCompletionWindow();
    }
}

export function DisplayCommandShortcuts(shortcutText: string) {
    UI.CommandCompletionDiv.classList.remove("hidden");
    var matchingShortcuts = Object.keys(UserSettings.CommandModeShortcuts).filter(x => x.toLowerCase().startsWith(shortcutText.toLowerCase()));
    matchingShortcuts.forEach(x => {
        var commandCompletionItem = document.createElement("div");
        commandCompletionItem.classList.add("command-completion-item");
        commandCompletionItem.innerHTML = x;
        commandCompletionItem.onclick = function (e: MouseEvent) {
            UI.CommandModeSelect.value = x;
            UI.ConsoleTextArea.value = "";
            UI.CommandCompletionDiv.classList.add("hidden");
            UI.CommandInfoDiv.classList.add("hidden");
        };
        commandCompletionItem.onfocus = function (e) {}
        UI.CommandCompletionDiv.appendChild(commandCompletionItem);
    })
    if (!UI.CommandCompletionDiv.classList.contains("hidden") && matchingShortcuts.length > 0) {
        HighlightCompletionWindowItem(Store.CommandCompletionPosition);
        PositionCommandCompletionWindow();
    }
}

export function SetCommandCompletionPositionToIncompleteParam(parameters: CommandLineParameter[]) {
    var lastParam = parameters[parameters.length - 1];
    if (typeof lastParam != 'undefined' && lastParam.Value.length == 0) {
        for (var i = 0; i < UI.CommandCompletionDiv.children.length; i++) {
            if (UI.CommandCompletionDiv.children[i].innerHTML.startsWith(lastParam.Name)) {
                Store.CommandCompletionPosition = i;
                break;
            }
        }
    }
}
export function HighlightCompletionWindowItem(index: number) {
    UI.CommandCompletionDiv.querySelectorAll("div.selected").forEach(x => {
        x.classList.remove("selected");
    });

    if (UI.CommandCompletionDiv.children.length >= index + 1) {
        UI.CommandCompletionDiv.children[index].classList.add("selected");
        UI.CommandCompletionDiv.children[Math.max(0, index - 1)].scrollIntoView();
    }
}
export function ShowCommandInfo(command: ConsoleCommand) {
    UI.CommandInfoDiv.innerHTML = command.PartialHelp;
    UI.CommandInfoDiv.classList.remove("hidden");
}

export function ShowParameterInfo(parameter: Parameter) {
    if (parameter.Summary.length > 0) {
        var paramText = "";
        if (parameter.ParameterType) {
            paramText = ` [${parameter.ParameterType}]`;
        }
        UI.CommandInfoDiv.innerHTML = `<span class='text-primary'>${parameter.Name}${paramText}: </span>
                                ${parameter.Summary}`;
        UI.CommandInfoDiv.classList.remove("hidden");
    }
}
export function PositionCommandCompletionWindow() {
    var computedStyle = window.getComputedStyle(UI.ConsoleTextArea);
    UI.MeasurementContext.font = computedStyle.fontSize + " " + computedStyle.fontFamily;
    var width = UI.MeasurementContext.measureText(UI.ConsoleTextArea.value).width;
    UI.CommandCompletionDiv.style.marginLeft = String(width) + "px";

    var wrapper = document.querySelector("#commandCompletionWrapper") as HTMLDivElement;
    var inputRect = UI.ConsoleTextArea.getBoundingClientRect();
    wrapper.style.left = String(inputRect.left) + "px";
    if (inputRect.top / document.documentElement.clientHeight > .5) {
        UI.CommandCompletionDiv.style.verticalAlign = "bottom";
        UI.CommandInfoDiv.style.verticalAlign = "bottom";
        wrapper.style.top = String(inputRect.top - wrapper.clientHeight) + "px";
    }
    else {
        UI.CommandCompletionDiv.style.verticalAlign = "top";
        UI.CommandInfoDiv.style.verticalAlign = "top";
        wrapper.style.top = String(inputRect.bottom + 5) + "px";
    }
}