#!/usr/bin/env node

/**
 * Daily script to send due date reminders for projects
 * Runs nightly to check for projects due in 3 days and 1 day
 */

import db from "./src/lib/db.js";
import { createNotification, NOTIFICATION_TYPES } from "./src/lib/notifications.js";
import { addDays, isBefore, parseISO, startOfDay } from "date-fns";

async function sendDueDateReminders() {
	try {
		console.log("🔍 Checking for projects with upcoming due dates...");

		const today = startOfDay(new Date());
		const threeDaysFromNow = addDays(today, 3);
		const oneDayFromNow = addDays(today, 1);

		// Get projects that are not fulfilled and have finish dates
		const projects = db.prepare(`
			SELECT
				p.project_id,
				p.project_name,
				p.finish_date,
				p.address,
				p.project_status,
				c.customer
			FROM projects p
			LEFT JOIN contracts c ON p.contract_id = c.contract_id
			WHERE
				p.finish_date IS NOT NULL
				AND p.project_status != 'fulfilled'
				AND p.project_status != 'cancelled'
		`).all();

		console.log(`📋 Found ${projects.length} active projects with due dates`);

		let remindersSent = 0;

		for (const project of projects) {
			try {
				const finishDate = parseISO(project.finish_date);
				const finishDateStart = startOfDay(finishDate);

				// Check if due in 3 days
				if (finishDateStart.getTime() === threeDaysFromNow.getTime()) {
					await sendReminder(project, 3);
					remindersSent++;
				}
				// Check if due in 1 day
				else if (finishDateStart.getTime() === oneDayFromNow.getTime()) {
					await sendReminder(project, 1);
					remindersSent++;
				}
			} catch (error) {
				console.error(`❌ Error processing project ${project.project_id}:`, error);
			}
		}

		console.log(`✅ Sent ${remindersSent} due date reminders`);

	} catch (error) {
		console.error("❌ Error in due date reminder script:", error);
	}
}

async function sendReminder(project, daysUntilDue) {
	try {
		// Get users who should receive notifications (admins and team leads)
		const recipients = db.prepare(`
			SELECT id, name, role
			FROM users
			WHERE role IN ('admin', 'team_lead') AND is_active = 1
		`).all();

		if (recipients.length === 0) {
			console.log("⚠️ No active admin or team lead users found to notify");
			return;
		}

		const dayText = daysUntilDue === 1 ? "dzień" : "dni";
		const title = `Projekt kończy się za ${daysUntilDue} ${dayText}`;
		const message = `Projekt "${project.project_name}" (${project.customer || 'Brak klienta'}) kończy się ${new Date(project.finish_date).toLocaleDateString('pl-PL')}. Adres: ${project.address || 'Brak adresu'}.`;

		for (const user of recipients) {
			await createNotification({
				userId: user.id,
				type: NOTIFICATION_TYPES.DUE_DATE_REMINDER,
				title,
				message,
				resourceType: "project",
				resourceId: project.project_id.toString(),
				actionUrl: `/projects/${project.project_id}`,
				priority: daysUntilDue === 1 ? "urgent" : "high"
			});

			console.log(`📢 Reminder sent to ${user.name} (${user.role}) for project: ${project.project_name}`);
		}

	} catch (error) {
		console.error(`❌ Failed to send reminder for project ${project.project_id}:`, error);
	}
}

// Run the script
sendDueDateReminders();