import type { PageServerLoad } from './$types';
import { db } from '$lib/server/db/index.js';
import { devices, components, componentInstances, installationLog } from '$lib/server/db/schema.js';
import { count, eq, or, and, desc, sql } from 'drizzle-orm';

export const load: PageServerLoad = async () => {
	const active = eq(devices.disabled, false);

	// Total counts
	const [totalDevices] = await db.select({ value: count() }).from(devices).where(active);
	const [computers] = await db
		.select({ value: count() })
		.from(devices)
		.where(and(active, eq(devices.category, 'Computer')));
	const [audio] = await db
		.select({ value: count() })
		.from(devices)
		.where(and(active, eq(devices.category, 'Audio Equipment')));
	const [totalComponents] = await db.select({ value: count() }).from(componentInstances);

	// Condition breakdown
	const conditionBreakdown = await db
		.select({
			condition: devices.condition,
			count: count()
		})
		.from(devices)
		.where(active)
		.groupBy(devices.condition);

	// Recent installation activity
	const recentActivity = await db
		.select({
			action: installationLog.action,
			performedAt: installationLog.performedAt,
			instanceId: installationLog.instanceId,
			instanceNumber: componentInstances.instanceNumber,
			deviceId: installationLog.deviceId,
			componentTitle: components.title,
			deviceTitle: devices.title
		})
		.from(installationLog)
		.innerJoin(componentInstances, eq(installationLog.instanceId, componentInstances.id))
		.innerJoin(components, eq(componentInstances.componentId, components.id))
		.innerJoin(devices, eq(installationLog.deviceId, devices.id))
		.orderBy(desc(installationLog.performedAt))
		.limit(10);

	// Devices needing repair
	const needsRepair = await db
		.select({
			id: devices.id,
			title: devices.title,
			category: devices.category,
			condition: devices.condition,
			faultDescription: devices.faultDescription
		})
		.from(devices)
		.where(and(active, or(eq(devices.condition, 'In Repair'), eq(devices.condition, 'Waiting for Repair'))))
		.limit(10);

	return {
		stats: {
			totalDevices: totalDevices?.value ?? 0,
			computers: computers?.value ?? 0,
			audio: audio?.value ?? 0,
			totalComponents: totalComponents?.value ?? 0
		},
		conditionBreakdown,
		recentActivity,
		needsRepair
	};
};