import { error } from '@sveltejs/kit'
import type { PageServerLoad } from './$types'
import { fetchAPI } from '$utils/api'

export const load: PageServerLoad = async ({ params }) => {
    try {
        // Get the first photo ID
        const firstPhoto = await fetchAPI(`
            query {
                photo (search: "${params.photo}") {
                    id
                }
            }
        `)
        const firstPhotoId = firstPhoto?.data?.photo[0]?.id

        // TODO: use same request for both queries (photo.id)
        const photosBeforeFirst = await fetchAPI(`
            query {
                count: photo_aggregated (
                    filter: {
                        id: { _gt: ${firstPhotoId} },
                        location: { slug: { _eq: "${params.location}" }},
                        status: { _eq: "published" },
                    },
                    sort: "-id",
                ) {
                    count {
                        id
                    }
                }
            }
        `)

        // Define offset from the current count
        const offset = Math.max(photosBeforeFirst?.data?.count[0]?.count.id - 5, 0)
        const limit = 10

        const res = await fetchAPI(`
            query {
                photos: photo (
                    filter: {
                        location: { slug: { _eq: "${params.location}" }}
                        status: { _eq: "published" },
                    },
                    sort: "-date_created",
                    limit: ${limit},
                    offset: ${offset},
                ) {
                    id
                    title
                    slug
                    date_taken
                    image {
                        id
                        title
                        width, height
                    }
                    city
                }

                location (filter: { slug: { _eq: "${params.location}" }}) {
                    id
                    name
                    slug
                    country {
                        name
                        slug
                    }
                }

                total_published: photo_aggregated (filter: { location: { slug: { _eq: "${params.location}" }}}) {
                    count { location }
                }
            }
        `)

        const { data } = res

        if (data) {
            const currentIndex = data.photos.findIndex((photo: any) => photo.slug === params.photo)

            return {
                photos: data.photos,
                location: data.location[0],
                currentIndex,
                countPhotos: data.total_published[0].count.location,
                limit,
                offset,
            }
        }
    } catch (err) {
        throw error(500, err)
    }
}