var requestsDiv = document.getElementById("requests");
var cronJobs = ['processBans'];
var currentPage = 1;
var totalPages = 1;

function getRequests(count,offset,allRequests) {
	if (allRequests) var reqUrl = "/api/getAllRequests";
	else var reqUrl = "/api/getRequests";
	reqUrl += `?count=${count}&offset=${offset}`;
	fetch(reqUrl)
		.then(response => response.json())
		.then(requests => {
			buildTable(requests);
		});
}

function buildTable(requests) {
	totalPages = Math.ceil(requests.total/document.getElementById("count").value);
	document.getElementById("totalPages").innerText = totalPages;
	if (currentPage <= 1) {
		currentPage = 1;
		document.getElementById("pageBtnFirst").disabled = true;
		document.getElementById("pageBtnPrev").disabled = true;
	} else {
		document.getElementById("pageBtnFirst").disabled = false;
		document.getElementById("pageBtnPrev").disabled = false;
	}
	if (currentPage >= totalPages) {
		currentPage = totalPages;
		document.getElementById("pageBtnLast").disabled = true;
		document.getElementById("pageBtnNext").disabled = true;
	} else {
		document.getElementById("pageBtnLast").disabled = false;
		document.getElementById("pageBtnNext").disabled = false;
	}
	document.getElementById("page").innerHTML = "";
	for (i = 1; i <= totalPages; i++) {
		document.getElementById("page").innerHTML += `<option value=${i}>${i}</option>`;
	}
	document.getElementById("page").value = currentPage;
	var requestsDivHTML = '<table><tr><th class="request-link">Song</th><th class="request-requester">Requester</th><th class="request-score">Score</th>';
	requestsDivHTML += '<th class="request-state">State</td>';
	if (window.loggedIn) requestsDivHTML += '<th class="request-vote">Vote</td>';
	if (window.isStreamer) requestsDivHTML += '<th class="request-update">Update</th>'
	requestsDivHTML += "</tr>";
	for (request of requests.requests) {
		requestsDivHTML += `<tr><td class="request-link"><a href="${request.url}" target="_blank">${request.title}</a></td>\
			<td class="request-requester">${request.imageurl ? `<img src="${request.imageurl}" class="table-userpic"/>` : ''}${request.requester}</td>\
			<td class="request-score">${request.score}</td>`;
		requestsDivHTML += `<td class="request-state">${request.state}</td>`;
		if (window.loggedIn) {
			if (request.voted) {
				requestsDivHTML += `<td class="request-vote"><button onclick="deleteVote('${request.url}')">Unvote</button></td>`;
			} else {
				requestsDivHTML += `<td class="request-vote"><button onclick="addVote('${request.url}')">Vote</button></td>`;
			}
			if (window.isStreamer) {
				requestsDivHTML += '<td class="request-update"><button onclick="openUpdateRequestModal(this.parentElement.parentElement)">Update</button></td>'
			}
		}
		requestsDivHTML += "</tr>";
	}
	requestsDivHTML += "</table>";
	requestsDiv.innerHTML = requestsDivHTML;
}

function updateTable() {
	var count = document.getElementById("count").value;
	var offset = (currentPage - 1) * count;
	var allRequests = document.getElementById("allRequests").checked;
	getRequests(count,offset,allRequests);
}

function applyUrlTransforms(url) {
	console.log("Begin applyUrlTransforms:" + url);
	if (url.match(/^https?:\/\/(www\.)?youtu(\.be|be\.com)\//)) { // Youtube
		console.log("Youtube");
		var videoid = "";
		// youtu.be share url - Do not anchor to $ due to parameters such as ?t=
		if (url.match(/^https?:\/\/youtu.be\/[A-Za-z0-9_-]{11}/)) {
			videoid = url.match(/(?<=^https:\/\/youtu.be\/)[A-Za-z0-9_-]{11}/)[0];
		} else if (url.match(/^https?:\/\/(www\.)?youtube\.com\//)) {
			videoid = url.match(/(?<=^https?:\/\/(www\.)?youtube\.com\/watch.*[?&]v=)[A-Za-z0-9_-]{11}/)[0];
		}
		var result = 'https://www.youtube.com/watch?v=' + videoid;
		console.log("Result: " + result);
		return result;
	}
}

function goToPage(page) {
	currentPage = parseInt(page,10);
	updateTable();
}

function getColorObject() {
	return {
		bg: {
			primary: document.getElementById('color-bg-primary').value,
			table: document.getElementById('color-bg-table').value,
			navbar: document.getElementById('color-bg-navbar').value,
			error: document.getElementById('color-bg-error').value,
		},
		fg: {
			primary: document.getElementById('color-fg-primary').value,
			ahover: document.getElementById('color-fg-ahover').value,
			title: document.getElementById('color-fg-title').value,
		}
	}
}

function addRequestErr(msg) {
	document.getElementById('addRequestError').style.display = "inline-block";
	document.getElementById('addRequestError').innerText = msg;
}

function addRequestErrReset() {
	document.getElementById('addRequestError').style.display = "none";
	document.getElementById('addRequestError').innerText = "";
}

function updateRequestErr(msg) {
	document.getElementById('updateRequestError').style.display = "inline-block";
	document.getElementById('updateRequestError').innerText = msg;
}

function updateRequestErrReset() {
	document.getElementById('updateRequestError').style.display = "none";
	document.getElementById('updateRequestError').innerText = "";
}

function streamerSettingsErr(msg) {
	document.getElementById('streamerSettingsError').style.display = "inline-block";
	document.getElementById('streamerSettingsError').innerText = msg;
}

function streamerSettingsErrReset() {
	document.getElementById('streamerSettingsError').style.display = "none";
	document.getElementById('streamerSettingsError').innerText = "";
}

// Hides all modals in preparation to show a one or to close out of
// all modals and return to the page. Does NOT hide modalBackground.
function hideModals() {
	document.getElementById("messageModal").style.display = "none";
	document.getElementById("addRequestModal").style.display = "none";
	document.getElementById("updateRequestModal").style.display = "none";
	document.getElementById("deleteRequestModal").style.display = "none";
	document.getElementById("streamerSettingsModal").style.display = "none";
}

function closeAllModals() {
	hideModals();
	document.getElementById("modalBackground").style.display = "none";
}

function showMessage(msg) {
	hideModals();
	document.getElementById("messageModalText").innerText = msg;
	document.getElementById("modalBackground").style.display = "flex";
	document.getElementById("messageModal").style.display = "block";
}

function openAddRequestModal() {
	hideModals();
	document.getElementById("modalBackground").style.display = "flex";
	document.getElementById("addRequestModal").style.display = "block";
}

function openUpdateRequestModal(tr) {
	hideModals();
	var url = tr.getElementsByClassName('request-link')[0].firstChild.href;
	var score = tr.getElementsByClassName('request-score')[0].innerText;
	var state = tr.getElementsByClassName('request-state')[0].innerText;
	document.getElementById("updateRequestUrl").href = url;
	document.getElementById("updateRequestUrl").innerText = url;
	document.getElementById("updateRequestModalCurrentScore").innerText = score;
	document.querySelector(`#updateRequestStateSelect [value="${state}"]`).selected = true;
	document.getElementById("scoreModifierInput").value = 0;
	document.getElementById("modalBackground").style.display = "flex";
	document.getElementById("updateRequestModal").style.display = "block";
}

function openDeleteRequestModal(url) {
	hideModals();
	document.getElementById("updateRequestUrl").href = url;
	document.getElementById("updateRequestUrl").innerText = url;
	document.getElementById("messageModal").style.display = "none";
	document.getElementById("addRequestModal").style.display = "none";
	document.getElementById("updateRequestModal").style.display = "none";
	document.getElementById("modalBackground").style.display = "flex";
	document.getElementById("deleteRequestModal").style.display = "block";
}

// Returns to update request modal
function closeDeleteRequestModal() {
	hideModals();
	document.getElementById("deleteRequestModal").style.display = "none";
	document.getElementById("updateRequestModal").style.display = "block";
}

function openStreamerSettingsModal() {
	hideModals();
	document.getElementById("modalBackground").style.display = "flex";
	document.getElementById("streamerSettingsModal").style.display = "block";
}

function cronRequest(job) {
	if (!cronJobs.includes(job)) throw new Error("Request for invalid job");
}

const validUrlRegexes = [
    /^https:\/\/www\.youtube\.com\/watch\?v=[a-zA-Z0-9_-]{11}$/
];
function validateAndSubmitRequest() {
	addRequestErrReset();
	var url = applyUrlTransforms(document.getElementById("addRequestUrl").value);
	var validUrl = false;
    for (var regex of validUrlRegexes) {
        if (regex.test(url)) {
            validUrl = true;
            break;
        }
    }
    if (!validUrl) {
		addRequestErr("Invalid URL");
		return;
	}
	fetch("/api/addRequest", { method: 'POST', body: new URLSearchParams({
		url: url
	})})
		.then(response => {
			updateTable();
			document.getElementById("addRequestUrl").value = "";
			response.text().then((message) => {
				closeAddRequestModal();
				showMessage(message);
			});
		});
}

function addVote(url) {
	fetch("/api/addVote", { method: 'POST', body: new URLSearchParams({
		url: url
	})})
		.then(response => {
			if (!response.ok) {
				response.text().then(showMessage);
				return;
			}
			updateTable();
			response.text().then(showMessage);
		});
}

function deleteVote(url) {
	fetch("/api/deleteVote", { method: 'POST', body: new URLSearchParams({
		url: url
	})})
		.then(response => {
			if (!response.ok) {
				response.text().then(addRequestErr);
				return;
			}
			updateTable();
			response.text().then(showMessage);
		});
}

function updateRequestState(url,state) {
	updateRequestErrReset();
	fetch("/api/updateRequestState", { method: 'POST', body: new URLSearchParams({
		url: url,
		state: state
	})})
		.then(response => {
			if (!response.ok) {
				response.text().then(updateRequestErr);
				return;
			}
			updateTable();
			response.text().then(showMessage);
		});
}

function updateRequestScoreModifier(url,scoreDiff) {
	updateRequestErrReset();
	fetch("/api/updateRequestScoreModifier", { method: 'POST', body: new URLSearchParams({
		url: url,
		scoreDiff: scoreDiff
	})})
		.then(response => {
			if (!response.ok) {
				response.text().then(updateRequestErr);
				return;
			}
			updateTable();
			response.text().then(showMessage);
		});
}

function updateRequestMetadata(url) {
	fetch("/api/updateRequestMetadata?url=" + url)
		.then(response => {
			updateTable();
			response.text().then(showMessage);
		});
}

function deleteRequest(url) {
	fetch("/api/deleteRequest", { method: 'POST', body: new URLSearchParams({
		url: url
	})})
		.then(response => {
			updateTable();
			response.text().then(showMessage);
		});
}

function updatePageTitle(pageTitle) {
	streamerSettingsErrReset();
	fetch("/api/updatePageTitle", { method: 'POST', body: new URLSearchParams({
		pageTitle: pageTitle
	})})
		.then(response => {
			if (response.ok) {
				location.reload();
			} else {
				response.text().then(streamerSettingsErr);
			}
		});
}

function updateColors(colors) {
	streamerSettingsErrReset();
	fetch("/api/updateColors", { method: 'POST', headers: {
		'Content-Type': 'application/json'
	}, body: JSON.stringify(colors)})
		.then(response => {
			if (response.ok) {
				location.reload();
			} else {
				response.text().then(streamerSettingsErr);
			}
		});
}

function updateVotePoints(user,follower,subscriber) {
	streamerSettingsErrReset();
	fetch("/api/updateVotePoints", { method: 'POST', body: new URLSearchParams({
		user: user,
		follower: follower,
		subscriber: subscriber
	})})
		.then(response => {
			if (response.ok) {
				location.reload();
			} else {
				response.text().then(streamerSettingsErr);
			}
		});
}

updateTable();

document.addEventListener("keydown", function onEvent(event) {
    if (event.key === "Escape") {
        closeAllModals();
    }
});
document.getElementById("modalBackground").addEventListener("click", (e) => { if (e.target === e.currentTarget) closeAllModals();});

var updateRequestStateSelect = document.getElementById("updateRequestStateSelect");
for(state of validStates) {
	var opt = document.createElement("option");
	opt.text = state;
	opt.value = state;
	updateRequestStateSelect.add(opt)
}