import { useApi } from '@/composables/useApi'
import type { LinkableUser } from '@/lib/directoryTypes'

export type UserListItem =
	| {
			kind: 'user'
			id: number
			username: string
			display_name: string
			email: string
			role: 'owner' | 'admin'
			status: 'accepted'
			created_at: string
	  }
	| {
			kind: 'invite'
			id: number
			email: string
			display_name?: string
			status: 'pending' | 'expired'
			created_at: string
	  }

export const USER_SKELETON_ROWS = 5

export function userRowKey(kind: UserListItem['kind'], id: number) {
	return `${kind}-${id}`
}

export function userDisplayName(item: UserListItem) {
	return item.display_name ?? ''
}

export function userRole(item: UserListItem): 'owner' | 'admin' {
	return item.kind === 'user' ? item.role : 'admin'
}

export interface CreatedInvite {
	id: number
	kind: 'invite'
	email: string
	status: 'pending'
	created_at: string
	expires_at: string
}

export function useUsers() {
	const { request } = useApi()

	function listUsers(): Promise<UserListItem[]> {
		return request<UserListItem[]>('/v1/user/')
	}

	async function listLinkableUsers(
		takenUserIds: ReadonlySet<number | null>,
	): Promise<LinkableUser[]> {
		const users = await listUsers()
		return users.flatMap((user) =>
			user.kind === 'user' && !takenUserIds.has(user.id)
				? [
						{
							id: user.id,
							label: user.display_name || user.username,
							email: user.email,
						},
					]
				: [],
		)
	}

	function inviteUser(email: string): Promise<CreatedInvite> {
		return request<CreatedInvite>('/v1/user/invite', {
			method: 'POST',
			headers: { 'Content-Type': 'application/json' },
			body: JSON.stringify({ email }),
		})
	}

	function cancelInvite(id: number): Promise<void> {
		return request<void>(`/v1/user/invite/${id}`, { method: 'DELETE' })
	}

	function renewInvite(id: number): Promise<CreatedInvite> {
		return request<CreatedInvite>(`/v1/user/invite/${id}/renew`, {
			method: 'POST',
		})
	}

	return {
		listUsers,
		listLinkableUsers,
		inviteUser,
		cancelInvite,
		renewInvite,
	}
}