import type { Attachment, Ticket } from "@/database";
import { text } from "@/utils/discord/components";
import { getPublicUrl } from "@/utils/s3";
import { generateTranscript } from "@/utils/tickets/transcripts";
import {
	ActionRowBuilder,
	AttachmentBuilder,
	ButtonBuilder,
	ButtonStyle,
	CheckboxBuilder,
	ContainerBuilder,
	LabelBuilder,
	ModalBuilder,
	SeparatorBuilder,
	TextDisplayBuilder,
	TextInputBuilder,
	TextInputStyle,
} from "discord.js";

// -- constants ------------------------------------------------------------------------------------
export const PAGINATION_SIZE = 10;

export const MODAL_IDS = {
	message: "ticket:message",
	reason: "ticket:reason",
} as const;

export const INPUT_IDS = {
	REASON: "ticket:reason_input",
	PRIVATE_REASON: "ticket:private_reason_input",
} as const;

// -- modals ---------------------------------------------------------------------------------------
export function getTicketReasonModal(staff = false) {
	const modal = new ModalBuilder()
		.setCustomId(MODAL_IDS.reason)
		.setTitle("Close Ticket");

	const pubReason = new LabelBuilder()
		.setLabel("Public Reason")
		.setDescription(
			staff
				? "Provide a reason for closing the ticket - this will be visible to the user"
				: "Provide a reason for closing the ticket",
		)
		.setTextInputComponent(
			new TextInputBuilder()
				.setCustomId(INPUT_IDS.REASON)
				.setPlaceholder("The issue was resolved.")
				.setStyle(TextInputStyle.Paragraph)
				.setMaxLength(2000)
				.setRequired(false),
		);

	const privateReason = new LabelBuilder()
		.setLabel("Private Reason")
		.setDescription(
			"Provide a reason for closing the ticket - this will only be visible to staff",
		)
		.setTextInputComponent(
			new TextInputBuilder()
				.setCustomId(INPUT_IDS.PRIVATE_REASON)
				.setPlaceholder("The issue was resolved.")
				.setStyle(TextInputStyle.Paragraph)
				.setMaxLength(2000)
				.setRequired(false),
		);

	const deleteGroup = new LabelBuilder()
		.setLabel("Immediately delete channel")
		.setCheckboxComponent(
			new CheckboxBuilder()
				.setCustomId("ticket:delete_checkbox")
				.setDefault(false),
		);

	modal.addLabelComponents(pubReason);
	if (staff) modal.addLabelComponents(privateReason, deleteGroup);
	return modal;
}

// -- container builders ---------------------------------------------------------------------------

export function constructTicketContainer(
	ticket: Ticket,
	attachmentsString: string,
	_context: "closed" | "view" = "closed",
	isPublic = true,
) {
	const closedByReporter = ticket.closedBy === "reporter";
	const closedByString = ticket.closedAt
		? closedByReporter
			? "reporter"
			: `<@${ticket.closedBy}> (staff)`
		: "N/A";

	const reasons = {
		publicReason: ticket.closeReason ?? undefined,
		privateReason: ticket.privateReason ?? undefined,
	};

	const reasonContructor = (title: string, reason?: string) =>
		reason
			? `### ${title} Reason\n${reason}`
			: `### ${title} Reason\n-# No ${title.toLowerCase()} reason provided.`;

	const buttons = new ActionRowBuilder<ButtonBuilder>().addComponents(
		new ButtonBuilder()
			.setLabel("View Transcript")
			.setStyle(ButtonStyle.Link)
			.setURL(`https://tickets.vt3e.cat/tickets/${ticket.id}`),
	);

	if (isPublic) {
		buttons.addComponents(
			new ButtonBuilder()
				.setCustomId(`ticket:thank:${ticket.id}`)
				.setLabel("Thank your moderator")
				.setEmoji("💖")
				.setStyle(ButtonStyle.Primary),
		);
	}

	const wasBehalfTicket = ticket.openedBy !== ticket.authorId;
	const reasonText = ticket.topic
		? `for reason: ${ticket.topic}`
		: "without a provided reason";
	const behalfText = wasBehalfTicket
		? `**Opened By**: <@${ticket.openedBy}> ${reasonText}`
		: null;

	const container = new ContainerBuilder()
		.addTextDisplayComponents(
			text(
				[
					`## Ticket #${ticket.id} (${ticket.anonymousId}) - ${ticket.status}`,
					`**Closed By**: ${closedByString}`,
					behalfText,
				].join("\n"),
			),
		)
		.addSeparatorComponents(new SeparatorBuilder().setDivider(false))
		.addTextDisplayComponents(
			text(
				[
					reasonContructor("Public", reasons?.publicReason),
					isPublic ? null : reasonContructor("Private", reasons?.privateReason),
				]
					.filter(Boolean)
					.join("\n"),
			),
		)
		.addSeparatorComponents(
			new SeparatorBuilder().setDivider(false).setSpacing(2),
		)
		.addTextDisplayComponents(
			text(
				[
					attachmentsString.length > 0
						? `-# **Attachments:** ${attachmentsString}`
						: "-# **Attachments:** no attachments",
				]
					.filter(Boolean)
					.join("\n"),
			),
		)
		.addActionRowComponents(buttons);

	return container;
}

export async function getTicketContainer(
	ticket: Ticket,
	context: "closed" | "view" = "closed",
	isPublic = true,
) {
	const [transcriptText, attachments] = await generateTranscript(ticket);
	const file = new AttachmentBuilder(Buffer.from(transcriptText, "utf-8"), {
		name: `transcript-${ticket.id}.txt`,
	});

	const attachmentsString = attachments
		.map(
			(att: Attachment, idx: number) =>
				`[Attachment #${idx + 1} (${att.fileName.split(".").slice(-1)[0].toUpperCase()})](<${getPublicUrl(att.key)}>)`,
		)
		.join(", ");

	return {
		container: constructTicketContainer(
			ticket,
			attachmentsString,
			context,
			isPublic,
		),
		transcriptText,
		attachments,
		files: [file],
	};
}