'use server'
import { clerkClient, auth } from '@clerk/nextjs/server'
import { google } from 'googleapis'
import { env } from '~/env'

export async function scheduleMeeting({
	title,
	description,
	dateTime,
	durationMinutes,
	attendeeEmail,
	attendeeName,
}: {
	title: string
	description: string
	dateTime: string
	durationMinutes: number
	attendeeEmail?: string
	attendeeName?: string
}) {
	try {
		const clerk = await clerkClient()
		const userAuth = await auth()
		const user = await clerk.users.getUser(userAuth.userId?userAuth.userId:"")
		// Get admin's Google OAuth token to create the event on Gregor's calendar
		const adminTokenResponse = await clerk.users.getUserOauthAccessToken(
			env.ADMIN_USER_CLERK_ID,
			'oauth_google',
		)
		const adminToken = adminTokenResponse.data[0]

		if (!adminToken?.token) {
			return { success: false, error: 'Admin Google Calendar not connected. Ensure the admin account is linked with Google and has calendar scope enabled.' }
		}

		// Try to resolve visitor's Google email for the invite
		let visitorEmail: string | undefined = attendeeEmail
		if (!visitorEmail) {
			visitorEmail = user?.emailAddresses.at(0)?.emailAddress ?? undefined
		}

		const oAuth2Client = new google.auth.OAuth2()
		oAuth2Client.setCredentials({ access_token: adminToken.token })
		const calendar = google.calendar({ version: 'v3', auth: oAuth2Client })

		const startTime = new Date(dateTime)
		const endTime = new Date(startTime.getTime() + durationMinutes * 60 * 1000)

		const attendees: { email: string; displayName?: string }[] = []
		if (visitorEmail) {
			attendees.push({ email: visitorEmail, displayName: attendeeName })
		}

		const event = await calendar.events.insert({
			calendarId: 'primary',
			sendUpdates: 'all',
			requestBody: {
				summary: title,
				description,
				start: { dateTime: startTime.toISOString(), timeZone: 'UTC' },
				end: { dateTime: endTime.toISOString(), timeZone: 'UTC' },
				attendees,
			},
			sendNotifications: true
		})

		return {
			success: true,
			eventId: event.data.id,
			htmlLink: event.data.htmlLink,
			message: `Meeting "${title}" scheduled for ${startTime.toLocaleString()}${visitorEmail ? `. Invite sent to ${visitorEmail}.` : '.'}`,
		}
	} catch (error) {
		console.error('Failed to schedule meeting:', error)
		return { success: false, error: 'Failed to schedule meeting. Please try again.' }
	}
}