import { syncMilestones, syncDice } from "../../config.mjs";

/** @this {Actor} */
async function useRestDie() {
	let addToSync = await (new Roll(syncDice)).evaluate();
	await addToSync.toMessage({
		speaker: ChatMessage.getSpeaker({ actor: this.actor }),
		flavor: `Sync Restoration`,
	});
	this.update({
		"system.rest_dice": this.system.rest_dice - 1,
		"system.value": this.system.value + addToSync.total,
	});
};

/** @this {Actor} */
async function _preUpdate(data, options) {
	if (options.diff) {
		if (data.system?.value != null) {
			let currentSync = this.system.value;
			let newSync = data.system.value;

			let minSync = Math.min(currentSync, newSync);
			let maxSync = Math.max(currentSync, newSync);
			let milestones = syncMilestones.filter(
				m => minSync < m.value && m.value <= maxSync
			);

			if (milestones.length > 0) data.system.rest_dice ??= this.system.rest_dice;

			for (const milestone of milestones) {
				// Damage
				if (newSync < currentSync) {
					if (!this.system.milestones_hit.has(milestone.value)) {
						data.system.rest_dice += 1;
						this.system.milestones_hit.add(milestone.value);
					};
				}

				// Healing
				else if (newSync > currentSync) {
					if (
						this.system.milestones_hit.has(milestone.value)
						&& milestone.andReturn
						&& milestone.value <= newSync
					) {
						this.system.milestones_hit.delete(milestone.value);
					};
				};
			};

			data.system.milestones_hit = [ ...this.system.milestones_hit ];
		};
	};
};

export default {
	_preUpdate,
	useRestDie,
};