ds4/src/module/rolls/check-factory.ts

// TODO: Rename to something sane.

import { DS4 } from "../config";

/**
 * Provides default values for all arguments the `CheckFactory` expects.
 */
class DefaultCheckOptions implements DS4CheckFactoryOptions {
    maxCritSuccess = 1;
    minCritFailure = 20;
    useSlayingDice = false;
    rollMode: DS4RollMode = "roll";

    mergeWith(other: Partial<DS4CheckFactoryOptions>): DS4CheckFactoryOptions {
        return { ...this, ...other } as DS4CheckFactoryOptions;
    }
}

const defaultCheckOptions = new DefaultCheckOptions();

/**
 * Most basic class responsible for generating the chat formula and passing it to the chat as roll.
 */
class CheckFactory {
    constructor(
        private checkTargetValue: number,
        private gmModifier: number,
        passedOptions: Partial<DS4CheckFactoryOptions> = {},
    ) {
        this.checkOptions = new DefaultCheckOptions().mergeWith(passedOptions);
    }

    private checkOptions: DS4CheckFactoryOptions;

    async execute(): Promise<void> {
        const rollCls: typeof Roll = CONFIG.Dice.rolls[0];

        const formula = [
            "ds",
            this.createTargetValueTerm(),
            this.createCritTerm(),
            this.createSlayingDiceTerm(),
        ].filterJoin("");
        const roll = new rollCls(formula);

        const rollModeTemplate = this.checkOptions.rollMode;
        console.log(rollModeTemplate);
        return roll.toMessage({}, { rollMode: rollModeTemplate, create: true });
    }

    // Term generators
    createTargetValueTerm(): string {
        if (this.checkTargetValue != null) {
            return "v" + (this.checkTargetValue + this.gmModifier);
        } else {
            return null;
        }
    }

    createCritTerm(): string {
        const minCritRequired = this.checkOptions.minCritFailure !== defaultCheckOptions.minCritFailure;
        const maxCritRequired = this.checkOptions.maxCritSuccess !== defaultCheckOptions.maxCritSuccess;

        if (minCritRequired || maxCritRequired) {
            return "c" + (this.checkOptions.maxCritSuccess ?? "") + "," + (this.checkOptions.minCritFailure ?? "");
        } else {
            return null;
        }
    }

    createSlayingDiceTerm(): string {
        return this.checkOptions.useSlayingDice ? "x" : null;
    }
}

// TODO: Figure out return of roll (void should be Ok, tough?)
/**
 * Asks the user for all unknown/necessary information and passes them on to perform a roll.
 * @param targetValue {number} The Check Target Number ("CTN")
 * @param options {Partial<DS4CheckFactoryOptions>} Options changing the behaviour of the roll and message.
 */
export async function createCheckRoll(targetValue: number, options: Partial<DS4CheckFactoryOptions>): Promise<void> {
    // Ask for additional required data;
    const gmModifierData = await askGmModifier(targetValue, options);

    const newOptions: Partial<DS4CheckFactoryOptions> = {
        maxCritSuccess: gmModifierData.maxCritSuccess ?? options.maxCritSuccess ?? undefined,
        minCritFailure: gmModifierData.minCritFailure ?? options.minCritFailure ?? undefined,
        useSlayingDice: gmModifierData.useSlayingDice ?? options.useSlayingDice ?? undefined,
        rollMode: gmModifierData.rollMode ?? options.rollMode ?? undefined,
    };

    // Create Factory
    const cf = new CheckFactory(gmModifierData.checkTargetValue, gmModifierData.gmModifier, newOptions);

    // Possibly additional processing

    // Execute roll
    await cf.execute();
}

/**
 * Responsible for rendering the modal interface asking for the modifier specified by GM.
 *
 * @notes
 * At the moment, this asks for more data than it will do after some iterations.
 *
 * @returns {Promise<number>} The number by the user.
 */
async function askGmModifier(
    targetValue: number,
    options: Partial<DS4CheckFactoryOptions>,
    { template, title }: { template?: string; title?: string } = {},
): Promise<GmModifierData> {
    // Render model interface and return value
    const usedTemplate = template ?? "systems/ds4/templates/roll/roll-options.hbs";
    const usedTitle = title ?? game.i18n.localize("DS4.RollDialogDefaultTitle");
    const templateData = {
        cssClass: "roll-option",
        title: usedTitle,
        checkTargetValue: targetValue,
        maxCritSuccess: options.maxCritSuccess ?? defaultCheckOptions.maxCritSuccess,
        minCritFailure: options.minCritFailure ?? defaultCheckOptions.minCritFailure,
        rollModes: rollModes,
        config: DS4,
    };
    const renderedHtml = await renderTemplate(usedTemplate, templateData);

    // TODO: Localize
    const dialogPromise = new Promise<HTMLFormElement>((resolve) => {
        new Dialog(
            {
                title: usedTitle,
                close: () => {
                    // Don't do anything
                },
                content: renderedHtml,
                buttons: {
                    ok: {
                        label: game.i18n.localize("DS4.RollDialogOkButton"),
                        callback: (html: HTMLElement | JQuery) => {
                            if (!("jquery" in html)) {
                                throw new Error(
                                    game.i18n.format("DS4.HtmlTypeError", {
                                        exType: "JQuery",
                                        realType: "HTMLElement",
                                    }),
                                );
                            } else {
                                const innerForm = html[0].querySelector("form");
                                resolve(innerForm);
                            }
                        },
                    },
                    cancel: {
                        label: game.i18n.localize("DS4.RollDialogCancelButton"),
                        callback: () => {
                            // Don't do anything
                        },
                    },
                },
                default: "ok",
            },
            {},
        ).render(true);
    });
    const dialogForm = await dialogPromise;
    return parseDialogFormData(dialogForm, targetValue);
}

function parseDialogFormData(formData: HTMLFormElement, targetValue: number): GmModifierData {
    return {
        checkTargetValue: parseInt(formData["ctv"]?.value) ?? targetValue,
        gmModifier: parseInt(formData["gmmod"]?.value) ?? 0,
        maxCritSuccess: parseInt(formData["maxcoup"]?.value) ?? defaultCheckOptions.maxCritSuccess,
        minCritFailure: parseInt(formData["minfumble"]?.value) ?? defaultCheckOptions.minCritFailure,
        useSlayingDice: false,
        rollMode: formData["visibility"]?.value ?? defaultCheckOptions.rollMode,
    };
}

// TODO: Remove unnecessary data step by step
interface GmModifierData {
    checkTargetValue: number;
    gmModifier: number;
    maxCritSuccess: number;
    minCritFailure: number;
    // TODO: In final version from system settings
    useSlayingDice: boolean;
    rollMode: DS4RollMode;
}

export interface DS4CheckFactoryOptions {
    maxCritSuccess: number;
    minCritFailure: number;
    useSlayingDice: boolean;
    rollMode: DS4RollMode;
}

const rollModes = ["roll", "gmroll", "blindroll", "selfroll"] as const;
type DS4RollModeTuple = typeof rollModes;
export type DS4RollMode = DS4RollModeTuple[number];