// SPDX-FileCopyrightText: 2021 Johannes Loher
// SPDX-FileCopyrightText: 2021 Oliver Rümpelein
// SPDX-FileCopyrightText: 2021 Gesina Schwalbe
// SPDX-FileCopyrightText: 2021 Siegfried Krug
//
// SPDX-License-Identifier: MIT

import { DS4ActiveEffect } from "../../active-effect";
import { ModifiableDataBaseTotal } from "../../common/common-data";
import { DS4 } from "../../config";
import { getCanvas, getGame } from "../../helpers";
import { DS4Settings, getDS4Settings } from "../../settings";
import notifications from "../../ui/notifications";
import { enforce } from "../../utils";
import { isCheck } from "../actor-data-properties";

/**
 * The base sheet class for all {@link DS4Actor}s.
 */
export class DS4ActorSheet extends ActorSheet<ActorSheet.Options, DS4ActorSheetData> {
    /** @override */
    static get defaultOptions(): ActorSheet.Options {
        return foundry.utils.mergeObject(super.defaultOptions, {
            classes: ["ds4", "sheet", "actor"],
            height: 620,
            scrollY: [".values", ".inventory", ".spells", ".abilities", ".effects", ".biography", ".description"],
            tabs: [{ navSelector: ".sheet-tabs", contentSelector: ".sheet-body", initial: "values" }],
            dragDrop: [
                { dragSelector: ".item-list .item", dropSelector: null },
                { dragSelector: ".ds4-check", dropSelector: null },
            ],
            width: 650,
        });
    }

    /** @override */
    get template(): string {
        const basePath = "systems/ds4/templates/sheets/actor";
        return `${basePath}/${this.actor.data.type}-sheet.hbs`;
    }

    /** @override */
    async getData(): Promise<DS4ActorSheetData> {
        const itemsByType = Object.fromEntries(
            Object.entries(this.actor.itemTypes).map(([itemType, items]) => {
                return [itemType, items.map((item) => item.data).sort((a, b) => (a.sort || 0) - (b.sort || 0))];
            }),
        );

        const enrichedEffectPromises = this.actor.effects.map(async (effect) => {
            return {
                ...effect.toObject(),
                icon: effect.data.icon ?? DS4ActiveEffect.FALLBACK_ICON,
                sourceName: await effect.getCurrentSourceName(),
            };
        });
        const enrichedEffects = await Promise.all(enrichedEffectPromises);

        const data = {
            ...this.addTooltipsToData(await super.getData()),
            config: DS4,
            itemsByType,
            enrichedEffects,
            settings: getDS4Settings(),
        };
        return data;
    }

    /**
     * Adds tooltips to the attributes, traits, and combatValues of the actor data of the given {@link ActorSheet.Data}.
     */
    protected addTooltipsToData(data: ActorSheet.Data): ActorSheet.Data {
        const valueGroups = [data.data.data.attributes, data.data.data.traits, data.data.data.combatValues];

        valueGroups.forEach((valueGroup) => {
            Object.values(valueGroup).forEach((attribute: ModifiableDataBaseTotal<number> & { tooltip?: string }) => {
                attribute.tooltip = this.getTooltipForValue(attribute);
            });
        });
        return data;
    }

    /**
     * Generates a tooltip for a given attribute, trait, or combatValue.
     */
    protected getTooltipForValue(value: ModifiableDataBaseTotal<number>): string {
        return `${value.base} (${getGame().i18n.localize("DS4.TooltipBaseValue")}) + ${
            value.mod
        } (${getGame().i18n.localize("DS4.TooltipModifier")}) ➞ ${getGame().i18n.localize("DS4.TooltipEffects")} ➞ ${
            value.total
        }`;
    }

    /** @override */
    activateListeners(html: JQuery): void {
        super.activateListeners(html);

        if (!this.options.editable) return;

        html.find(".control-item").on("click", this.onControlItem.bind(this));
        html.find(".change-item").on("change", this.onChangeItem.bind(this));

        html.find(".control-effect").on("click", this.onControlEffect.bind(this));
        html.find(".change-effect").on("change", this.onChangeEffect.bind(this));

        html.find(".rollable-item").on("click", this.onRollItem.bind(this));
        html.find(".rollable-check").on("click", this.onRollCheck.bind(this));
    }

    /**
     * Handles a click on an element of this sheet to control an embedded item of the actor corresponding to this sheet.
     *
     * @param event - The originating click event
     */
    protected onControlItem(event: JQuery.ClickEvent): void {
        event.preventDefault();
        const a = event.currentTarget;
        switch (a.dataset["action"]) {
            case "create":
                return this.onCreateItem(event);
            case "edit":
                return this.onEditItem(event);
            case "delete":
                return this.onDeleteItem(event);
        }
    }

    /**
     * Creates a new embedded item using the initial data defined in the HTML dataset of the clicked element.
     *
     * @param event - The originating click event
     */
    protected onCreateItem(event: JQuery.ClickEvent): void {
        const { type, ...data } = foundry.utils.deepClone(event.currentTarget.dataset);
        const name = getGame().i18n.localize(`DS4.New${type.capitalize()}Name`);
        const itemData = {
            name: name,
            type: type,
            data: data,
        };
        Item.create(itemData, { parent: this.actor });
    }

    /**
     * Opens the sheet of the embedded item corresponding to the clicked element.
     *
     * @param event - The originating click event
     */
    protected onEditItem(event: JQuery.ClickEvent): void {
        const id = $(event.currentTarget).parents(".item").data("id");
        const item = this.actor.items.get(id);
        enforce(item, getGame().i18n.format("DS4.ErrorActorDoesNotHaveItem", { id, actor: this.actor.name }));
        enforce(item.sheet);
        item.sheet.render(true);
    }

    /**
     * Deletes the embedded item corresponding to the clicked element.
     *
     * @param event - The originating click event
     */
    protected onDeleteItem(event: JQuery.ClickEvent): void {
        const li = $(event.currentTarget).parents(".item");
        this.actor.deleteEmbeddedDocuments("Item", [li.data("id")]);
        li.slideUp(200, () => this.render(false));
    }

    /**
     * Applies a change to a property of an embedded item depending on the `data-property` attribute of the
     * {@link HTMLInputElement} that has been changed and its new value.
     *
     * @param event - The originating change event
     */
    protected onChangeItem(event: JQuery.ChangeEvent): void {
        return this.onChangeEmbeddedDocument(event, ".item", "Item");
    }

    /**
     * Handles a click on an element of this sheet to control an embedded effect of the actor corresponding to this
     * sheet.
     *
     * @param event - The originating click event
     */
    protected onControlEffect(event: JQuery.ClickEvent): void {
        event.preventDefault();
        const a = event.currentTarget;
        switch (a.dataset["action"]) {
            case "create":
                return this.onCreateEffect();
            case "edit":
                return this.onEditEffect(event);
            case "delete":
                return this.onDeleteEffect(event);
        }
    }

    /**
     * Creates a new embedded effect.
     *
     * @param event - The originating click event
     */
    protected onCreateEffect(): void {
        const effectData = {
            label: getGame().i18n.localize(`DS4.NewEffectLabel`),
            icon: "icons/svg/aura.svg",
            origin: this.actor.uuid,
        };
        ActiveEffect.create(effectData, { parent: this.actor });
    }

    /**
     * Opens the sheet of the embedded effect corresponding to the clicked element.
     *
     * @param event - The originating click event
     */
    protected onEditEffect(event: JQuery.ClickEvent): void {
        const id = $(event.currentTarget).parents(".effect").data("id");
        const effect = this.actor.effects.get(id);
        enforce(effect, getGame().i18n.format("DS4.ErrorActorDoesNotHaveEffect", { id, actor: this.actor.name }));
        effect.sheet.render(true);
    }

    /**
     * Deletes the embedded item corresponding to the clicked element.
     *
     * @param event - The originating click event
     */
    protected onDeleteEffect(event: JQuery.ClickEvent): void {
        const li = $(event.currentTarget).parents(".effect");
        const id = li.data("id");
        this.actor.deleteEmbeddedDocuments("ActiveEffect", [id]);
        li.slideUp(200, () => this.render(false));
    }

    /**
     * Applies a change to a property of an embedded effect depending on the `data-property` attribute of the
     * {@link HTMLInputElement} that has been changed and its new value.
     *
     * @param event - The originating change event
     */
    protected onChangeEffect(event: JQuery.ChangeEvent): void {
        return this.onChangeEmbeddedDocument(event, ".effect", "ActiveEffect");
    }

    /**
     * Applies a change to a property of an embedded document of the actor belonging to this sheet. The change depends
     * on the `data-property` attribute of the {@link HTMLInputElement} that has been changed and its new value.
     *
     * @param event - The originating change event
     * @param documentSelector - The selector for the closest parent of the changed {@link HTMLInputElement}, which
     *                           contains the `data-id` attribute providing  the `id` of the embedded document to be
     *                           changed.
     * @param documentName - The name of the embedded document to be changed.
     */
    protected onChangeEmbeddedDocument(
        event: JQuery.ChangeEvent,
        documentSelector: string,
        documentName: "Item" | "ActiveEffect",
    ): void {
        event.preventDefault();
        const element = $(event.currentTarget).get(0);
        enforce(element instanceof HTMLInputElement);
        if (element.disabled) return;

        const effectElement = element.closest(documentSelector);
        enforce(effectElement instanceof HTMLElement);
        const id = effectElement.dataset["id"];
        const property = element.dataset["property"];
        const inverted = Boolean(element.dataset["inverted"]);
        enforce(property !== undefined, TypeError("HTML element does not provide 'data-property' attribute"));

        const newValue = this.parseValue(element, inverted);
        this.actor.updateEmbeddedDocuments(documentName, [{ _id: id, [property]: newValue }]);
    }

    /**
     * Parses the value of the given {@link HTMLInputElement} depending on the element's type
     * The value is parsed to:
     * - checkbox: `boolean`
     * - text input: `string`
     * - number: `number`
     *
     * @param element - The input element to parse the value from
     * @param inverted - Whether or not the value should be inverted
     */
    protected parseValue(element: HTMLInputElement, inverted = false): boolean | string | number {
        switch (element.type) {
            case "checkbox": {
                const value: boolean = element.checked;
                return inverted ? !value : value;
            }
            case "text": {
                const value: string = element.value;
                return value;
            }
            case "number": {
                const value = Number(element.value.trim());
                return value;
            }
            default: {
                throw new TypeError(
                    "Binding of item property to this type of HTML element not supported; given: " + element,
                );
            }
        }
    }

    /**
     * Handle clickable item rolls.
     * @param event - The originating click event
     */
    protected onRollItem(event: JQuery.ClickEvent): void {
        event.preventDefault();
        const id = $(event.currentTarget).parents(".item").data("id");
        const item = this.actor.items.get(id);
        enforce(item, getGame().i18n.format("DS4.ErrorActorDoesNotHaveItem", { id, actor: this.actor.name }));
        item.roll().catch((e) => notifications.error(e, { log: true }));
    }

    /**
     * Handle clickable check rolls.
     * @param event - The originating click event
     */
    protected onRollCheck(event: JQuery.ClickEvent): void {
        event.preventDefault();
        const check = event.currentTarget.dataset["check"];
        this.actor.rollCheck(check).catch((e) => notifications.error(e, { log: true }));
    }

    /** @override */
    _onDragStart(event: DragEvent): void {
        const target = event.currentTarget as HTMLElement;
        if (!(target instanceof HTMLElement)) return super._onDragStart(event);

        const check = target.dataset.check;
        if (!check) return super._onDragStart(event);

        enforce(isCheck(check), getGame().i18n.format("DS4.ErrorCannotDragMissingCheck", { check }));

        const dragData = {
            actorId: this.actor.id,
            sceneId: this.actor.isToken ? getCanvas().scene?.id : null,
            tokenId: this.actor.isToken ? this.actor.token?.id : null,
            type: "Check",
            data: check,
        };

        event.dataTransfer?.setData("text/plain", JSON.stringify(dragData));
    }

    /** @override */
    protected async _onDropItem(event: DragEvent, data: ActorSheet.DropData.Item): Promise<unknown> {
        const item = await Item.fromDropData(data);
        if (item && !this.actor.canOwnItemType(item.data.type)) {
            notifications.warn(
                getGame().i18n.format("DS4.WarningActorCannotOwnItem", {
                    actorName: this.actor.name,
                    actorType: this.actor.data.type,
                    itemName: item.name,
                    itemType: item.data.type,
                }),
            );
            return false;
        }
        return super._onDropItem(event, data);
    }
}

interface DS4ActorSheetData extends ActorSheet.Data<ActorSheet.Options> {
    config: typeof DS4;
    itemsByType: Record<string, foundry.data.ItemData[]>;
    enrichedEffects: EnrichedActiveEffectDataSource[];
    settings: DS4Settings;
}

type ActiveEffectDataSource = foundry.data.ActiveEffectData["_source"];

interface EnrichedActiveEffectDataSource extends ActiveEffectDataSource {
    icon: string;
    sourceName: string;
}