const Belonging = require('./belongingModel')
const AppError = require('../../globalErrorHandler/AppError')
const { client } = require('../../setup/typesense')
const TsApiFeatures = require("../../utils/TsApiFeatures");

const getAllBelongings = async () => {
    return Belonging.find({}, null, null).populate('category')
}

const createBelonging = async (data) => {
    console.log(data)
    return Belonging.create(data, null)
}

const getBelonging = async (belongingId) => {
    let belonging = await Belonging.findById(belongingId, null, null)

    if (!belonging) {
        throw new AppError('NoBelongingFound', 404, {})
    }

    const documentUrls = await belonging.getDocumentsSignedUrls()
    const imageUrls = await belonging.getImagesSignedUrls()
    const mainImageUrls = await belonging.getMainImagedSignedUrl()

    belonging = JSON.parse(JSON.stringify(belonging))

    belonging.signedDocumentUrls = documentUrls
    belonging.signedImageUrls = imageUrls
    belonging.signedMainImageUrls = mainImageUrls


    return belonging
}

const updateBelonging = async (belongingId, data) => {
    const belonging = await Belonging.findOneAndUpdate({ _id: belongingId }, data, { new: true })

    if (!belonging) {
        throw new AppError('NoBelongingFound', 404, {})
    }

    return belonging
}

const deleteBelonging = async (belongingId) => {
    const belonging = await Belonging.findByIdAndUpdate(belongingId, { isActive: false }, { new: true })

    if (!belonging) {
        throw new AppError('NoBelongingFound', 404, {})
    }

    return null
}

const ensureCollectionExists = async () => {
    const collections = await client.collections().retrieve()
    const collectionExists = collections.some((collection) => collection.name === 'belongings')

    if (collectionExists) {
        await client.collections('belongings').delete()
    }

    const schema = getTypeSenseSchema()

    await client.collections().create(schema)
    console.log('Collection "belongings" created successfully')
}

const searchBelongings = async (inputQuery) => {
    const tsFeatures = new TsApiFeatures(client, 'belongings', inputQuery).filter().facet().sort().limitFields().paginate().search()

    let {facets, items, totalCount, pagesCount} = await tsFeatures.execute()

    return {facets, belongings: items, totalCount, pagesCount}
}
const indexAllBelongings = async () => {
    const batchSize = 20
    const count = await Belonging.countDocuments({}, null)
    const rounds = Math.ceil(count / batchSize)

    await ensureCollectionExists()

    for (let i = 1; i <= rounds; i++) {
        console.log(`Indexing ${batchSize} belongings, Round ${i}`)

        const belongings = await Belonging.find({}, null, null)
            .populate('category')
            .skip((i - 1) * batchSize)
            .limit(batchSize)

        let documents = []

        for (const belonging of belongings) {

            const data = {
                _id: belonging._id,
                isActive: belonging.isActive,
                belongingCode: belonging.belongingCode,
                category: belonging.category.map( x=> x.englishName),
                nativeCategory: belonging.category.map( x=> x.nativeName),
                documents: belonging.documents,
                description: belonging.description,
                coordinates: belonging.location.coordinates
            }

            documents.push(data)
        }

        await client.collections('belonging').documents().import(documents, {action: 'emplace'})
    }

    return {totalCount: count}
}


const getTypeSenseSchema = () => {
    return {
        name: 'belongings',
        enable_nested_fields: true,
        fields: [
            { name: '_id', type: 'string', facet: false, infix: false },
            { name: 'isActive', type: 'bool', facet: false, infix: true },
            { name: 'belongingCode', type: 'string', facet: true },
            { name: 'category', type: 'string[]', facet: true },
            { name: 'nativeCategory', type: 'string[]', facet: false },
            { name: 'documents', type: 'string[]', facet: false },
            { name: 'description', type: 'string', facet: false },
            { name: 'coordinates', type: 'geopoint' },
        ],
        default_sorting_field: 'createdAt',
    }
}

module.exports = {updateBelonging, indexAllBelongings, getBelonging, getAllBelongings, createBelonging, deleteBelonging, searchBelongings}