import { MODULE_ID, SETTINGS, DEFAULT_REACTION, ACTION_TYPES, TRIGGER_TYPES } from "../constants.js";
import { assignReactionToSelectedTokens, removeAssignment } from "./assignment-manager.js";

const { ApplicationV2, HandlebarsApplicationMixin } = foundry.applications.api;

export class ConfigurableReactionsConfigApp extends HandlebarsApplicationMixin(ApplicationV2) {
  static DEFAULT_OPTIONS = {
    id: "configurable-reactions-config",
    tag: "section",
    classes: ["configurable-reactions", "standard-form"],
    window: {
      title: "CONFIGURABLE_REACTIONS.App.Title",
      icon: "fa-solid fa-bolt"
    },
    position: {
      width: 900,
      height: 760
    },
    actions: {
      createReaction: ConfigurableReactionsConfigApp.#onCreateReaction,
      saveReactionJson: ConfigurableReactionsConfigApp.#onSaveReactionJson,
      deleteReaction: ConfigurableReactionsConfigApp.#onDeleteReaction,
      assignSelectedTokens: ConfigurableReactionsConfigApp.#onAssignSelectedTokens,
      removeAssignment: ConfigurableReactionsConfigApp.#onRemoveAssignment,
      addTeleportAction: ConfigurableReactionsConfigApp.#onAddTeleportAction,
      addStatusAction: ConfigurableReactionsConfigApp.#onAddStatusAction
    }
  };

  static PARTS = {
    main: {
      template: `modules/${MODULE_ID}/templates/reaction-config.hbs`
    }
  };

  async _prepareContext(options) {
    const reactions = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.REACTIONS) ?? []);
    const assignments = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.ASSIGNMENTS) ?? []);

    const selectedReactionId = this._selectedReactionId ?? reactions[0]?.id ?? null;
    const selectedReaction = reactions.find(r => r.id === selectedReactionId) ?? reactions[0] ?? null;
    this._selectedReactionId = selectedReaction?.id ?? null;

    return {
      reactions,
      assignments: assignments.map(a => ({
        ...a,
        reactionName: reactions.find(r => r.id === a.reactionId)?.name ?? a.reactionId
      })),
      selectedReaction,
      selectedReactionJson: selectedReaction ? JSON.stringify(selectedReaction, null, 2) : "",
      triggerTypes: TRIGGER_TYPES,
      actionTypes: ACTION_TYPES,
      statusEffects: CONFIG.statusEffects.map(s => ({ id: s.id, name: game.i18n.localize(s.name ?? s.id) }))
    };
  }

  _onRender(context, options) {
    super._onRender(context, options);

    this.element.querySelector("[name='selectedReactionId']")?.addEventListener("change", event => {
      this._selectedReactionId = event.currentTarget.value;
      this.render({ force: true });
    });
  }

  static async #onCreateReaction(event, target) {
    const reactions = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.REACTIONS) ?? []);
    const reaction = foundry.utils.deepClone(DEFAULT_REACTION);
    reaction.id = foundry.utils.randomID();
    reaction.name = game.i18n.localize("CONFIGURABLE_REACTIONS.Reactions.NewReaction");

    reactions.push(reaction);
    await game.settings.set(MODULE_ID, SETTINGS.REACTIONS, reactions);

    this._selectedReactionId = reaction.id;
    this.render({ force: true });
  }

  static async #onSaveReactionJson(event, target) {
    const textarea = this.element.querySelector("[name='reactionJson']");
    if (!textarea) return;

    let reaction;
    try {
      reaction = JSON.parse(textarea.value);
    } catch (error) {
      ui.notifications.error(game.i18n.localize("CONFIGURABLE_REACTIONS.Errors.InvalidJson"));
      return;
    }

    if (!reaction.id) reaction.id = foundry.utils.randomID();
    if (!reaction.name) reaction.name = game.i18n.localize("CONFIGURABLE_REACTIONS.Reactions.NewReaction");

    const reactions = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.REACTIONS) ?? []);
    const index = reactions.findIndex(r => r.id === reaction.id);
    if (index >= 0) reactions[index] = reaction;
    else reactions.push(reaction);

    await game.settings.set(MODULE_ID, SETTINGS.REACTIONS, reactions);
    this._selectedReactionId = reaction.id;
    this.render({ force: true });
  }

  static async #onDeleteReaction(event, target) {
    const reactionId = this.element.querySelector("[name='selectedReactionId']")?.value;
    if (!reactionId) return;

    const confirmed = await foundry.applications.api.DialogV2.confirm({
      window: { title: game.i18n.localize("CONFIGURABLE_REACTIONS.Reactions.Delete") },
      content: `<p>${game.i18n.localize("CONFIGURABLE_REACTIONS.Reactions.DeleteConfirm")}</p>`
    });

    if (!confirmed) return;

    const reactions = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.REACTIONS) ?? [])
      .filter(r => r.id !== reactionId);
    const assignments = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.ASSIGNMENTS) ?? [])
      .filter(a => a.reactionId !== reactionId);

    await game.settings.set(MODULE_ID, SETTINGS.REACTIONS, reactions);
    await game.settings.set(MODULE_ID, SETTINGS.ASSIGNMENTS, assignments);

    this._selectedReactionId = reactions[0]?.id ?? null;
    this.render({ force: true });
  }

  static async #onAssignSelectedTokens(event, target) {
    const reactionId = this.element.querySelector("[name='selectedReactionId']")?.value;
    await assignReactionToSelectedTokens(reactionId);
    this.render({ force: true });
  }

  static async #onRemoveAssignment(event, target) {
    const assignmentId = target.dataset.assignmentId;
    await removeAssignment(assignmentId);
    this.render({ force: true });
  }

  static async #onAddTeleportAction(event, target) {
    await this.#addAction({
      id: foundry.utils.randomID(),
      type: ACTION_TYPES.TELEPORT,
      enabled: true,
      radius: 30,
      askOwner: false,
      snapToGrid: true,
      maxAttempts: 80,
      consumeOnFailure: false
    });
  }

  static async #onAddStatusAction(event, target) {
    await this.#addAction({
      id: foundry.utils.randomID(),
      type: ACTION_TYPES.APPLY_STATUS,
      enabled: true,
      statuses: [],
      duration: {
        type: "rounds",
        value: 1
      }
    });
  }

  async #addAction(action) {
    const reactions = foundry.utils.deepClone(game.settings.get(MODULE_ID, SETTINGS.REACTIONS) ?? []);
    const reaction = reactions.find(r => r.id === this._selectedReactionId);
    if (!reaction) return;

    reaction.actions ??= [];
    reaction.actions.push(action);

    await game.settings.set(MODULE_ID, SETTINGS.REACTIONS, reactions);
    this.render({ force: true });
  }
}