// ==UserScript==
// @name         GrepoTweaks-SentinelButton
// @namespace    sentinelbutton
// @author       Sau1707
// @description  Add a button in the Context Menu for easly send a sentinel
// @version      1.1.1
// @match        http://*.grepolis.com/game/*
// @match        https://*.grepolis.com/game/*
// @match        https://sau1707.github.io/Grepolis/
// @require      https://github.com/Sau1707/Grepolis/raw/main/update.js
// ==/UserScript==

(function () {
	'use strict';
	const uw = unsafeWindow ? unsafeWindow : window;

	/* return true if polis has own troops inside else otherwise or if  it's player polis */
	function hasSentinel(id) {
		const towns = Object.keys(uw.ITowns.towns);
		for (let town of towns) {
			if (town == id) return true;
			const models = uw.ITowns.all_supporting_units.fragments[town].models;
			for (let model of models) if (model.attributes.current_town_id == id) return true;
		}
		return false;
	}

	/* Retrun true if polis is in current active polis island */
	function isTownInIsland(x, y) {
		const currentTown = uw.ITowns.getCurrentTown();
		const cx = currentTown.getIslandCoordinateX();
		const cy = currentTown.getIslandCoordinateY();
		if (cx == x && cy == y) return true;
		return false;
	}

	/* Make ajax request */
	function sendSentinel(unit, target_id) {
		let data = { id: target_id, type: 'support' };
		data[unit] = 3;
		uw.gpAjax.ajaxPost('town_info', 'send_units', data);
	}

	/* Return what unit of current polis can be used */
	function selectUnit() {
		let units = uw.ITowns.getCurrentTown().getLandUnits();
		if (units.sword > 3) return 'sword';
		if (units.archer > 3) return 'archer';
		if (units.hoplite > 3) return 'hoplite';
		return null;
	}

	/* Return true if the polis already have a support incoming */
	function hasIncomingSupport(target_id) {
		let movments = uw.MM.getModels().MovementsUnits;
		for (let m in movments) if (movments[m].attributes.target_town_id == target_id) return true;
		return false;
	}

	/* Handle the clic of the sentinel button in context menu*/
	function handleButtonClick(target) {
		let unit = selectUnit();
		if (!unit) {
			uw.HumanMessage.error('No troops available');
			return;
		}
		sendSentinel(unit, target.id);
	}

	/* When user click the polis set current polis */
	uw.$.Observer(uw.GameEvents.map.town.click).subscribe((e, data) => {
		if (!isTownInIsland(data.x, data.y)) return;
		if (hasSentinel(data.id)) return;
		if (hasIncomingSupport(data.id)) return;
		let menu = uw.$('#context_menu');
		if (!menu) return;
		let div = document.createElement('div');
		div.id = 'sentinel_button';
		div.style.width = '50px';
		div.style.height = '50px';
		div.style.position = 'absolute';
		div.style.background = `url(https://i.ibb.co/9wwBNfD/sentinel.png)`;
		div.style.zIndex = 'auto';
		div.style.cursor = 'pointer';
		div.innerHTML = `
        <div id="sentinel_description" style="position: absolute;overflow: hidden;width: 118px;display: none;margin-left: -59px;left: 50%;top: 40px;z-index: 5;" >
        <div style="position: absolute; top: 0; left: 0; right: 0; background: url(https://gpit.innogamescdn.com/images/game/autogenerated/layout/layout_095495a.png) no-repeat -488px -406px; width: 118px; height: 18px;"></div>
        <div style="position: absolute; top: 18px; left: 0; right: 0; bottom: 11px; background: url(https://gpit.innogamescdn.com/images/game/layout/context_menu_middle.png) repeat-y 0 0;"></div>
        <div style="position: absolute; bottom: 0; left: 0; right: 0; background: url(https://gpit.innogamescdn.com/images/game/autogenerated/layout/layout_095495a.png) no-repeat -326px -240px; width: 118px; height: 11px;"></div>
        <div style="color: #fc6; font-weight: 700; text-align: center; word-wrap: break-word; line-height: 19px; z-index: 1; position: relative; padding: 4px;">Sentinel</div>
        </div>`;
		menu.append(div);
		uw.$('#sentinel_button').animate({ top: '-100px' }, 120);
		uw.$('#sentinel_button').hover(
			() => {
				uw.$('#sentinel_description').css('display', 'block');
			},
			() => {
				uw.$('#sentinel_description').css('display', 'none');
			},
		);
		uw.$('#sentinel_button').click(() => {
			handleButtonClick(data);
			menu.remove();
		});
	});

	console.log('[GrepoTweaks-SentinelButton] Loaded');
})();