import {MongoClient} from 'mongodb'
import crypto from "crypto"
import config from '../../config/config'
const url = config.mongodb_url;
const options = {
    useNewUrlParser: true,
    useUnifiedTopology: true
};
const db_main = 'Scenery';
const client = new MongoClient(url, options);
client.connect(function(err) {
    if (err) {
        console.log(err)
    } else {
        console.log("Connected successfully to db server");
    }
});
client.db(db_main).listCollections({
    name: "not_activated_users"
}).toArray().then(function(items) {
    if (items.length === 0) {
        client.db(db_main).collection("not_activated_users").createIndex({
            "createdAt": 1
        }, {
            expireAfterSeconds: 86400
        });
    }
});

client.db(db_main).listCollections({
    name: "password_recovery"
}).toArray().then(function(items) {
    if (items.length === 0) {
        client.db(db_main).collection("password_recovery").createIndex({
            "createdAt": 1
        }, {
            expireAfterSeconds: 86400
        });
    }
});

async function findDocuments(collection_name:string, selector:Record<string,unknown>) {
    const collection = client.db(db_main).collection(collection_name);
    // collection.find(selector).project({_id:0}).explain((_err,exp)=>console.log(exp))
    const result = collection.find(selector).project({_id:0}).toArray()
    return result
}
async function removeDocument(collection_name:string, selector:Record<string,unknown>) {
    const collection = client.db(db_main).collection(collection_name);
    return collection.deleteOne(selector)

}

async function insertDocuments(collection_name:string, documents:Array<any>) {
    const collection = client.db(db_main).collection(collection_name);
    return collection.insertMany(documents)
    // const result = await collection.insertMany(documents);
    // return result
}
async function updateDocument(collection_name:string,selector:Record<string,unknown>,update:Record<string,unknown>) {
  const collection = client.db(db_main).collection(collection_name);
  collection.updateOne(selector, { $set: update })
  //const result= await collection.updateOne(selector, { $set: update })
 // console.log(result)
}
async function addToArrayInDocument(collection_name:string,selector:Record<string,unknown>,update:Record<string,unknown>) {
    const collection = client.db(db_main).collection(collection_name);
    const result = collection.updateOne(selector, { $push: update })
    return result
}

 


async function generate_id() {
    const id = new Promise((resolve, reject) => {
        crypto.randomBytes(32, async function(ex, buffer) {
            if (ex) {
                reject("error");
            }
            const id = buffer.toString("base64").replace(/\/|=|[+]/g, '')
            const users = await find_user_by_id(id) //check if id exists
            if (users.length === 0) {
                resolve(id);
            } else {
                const id_1 = await generate_id()
                resolve(id_1)
            }
        });
    });
    return id;
}
/////////////////////////////////////////////////IMAGE SEARCH OPS

async function delete_sift_feature_by_id(id:number){
    removeDocument("sift_reverse_search",{id:id})
}

async function add_sift_features_by_id(id:number,sift_features:Array<any>){
    insertDocuments("sift_reverse_search", [{
        id:id,
        sift_features:sift_features
    }])
}

async function get_sift_features_batch(skip:number,limit:number){
    const collection = client.db(db_main).collection("sift_reverse_search");
    // collection.find().skip(skip).limit(limit).project({_id:0}).explain((_err,exp)=>console.log(exp))
    const similarities = collection.find().skip(skip).limit(limit).project({_id:0}).toArray()
    return similarities
}


async function get_sift_features_by_id(id:number){
    const collection = client.db(db_main).collection("sift_reverse_search");
    const similarities = collection.find({id:id}).project({_id:0,id:0}).toArray()
    return similarities
}
async function get_number_of_images_sift_reverse_search(){
    const collection = client.db(db_main).collection("sift_reverse_search");
    const number_of_images_in_collection = collection.countDocuments()
    return number_of_images_in_collection
}


async function get_color_similarities_by_id(id:number){
const collection = client.db(db_main).collection("color_similarities");
// collection.find(selector).project({_id:0}).explain((_err,exp)=>console.log(exp))
const similarities = collection.find({id:id}).project({_id:0,id:0}).toArray()
return similarities
}

async function delete_id_from_color_similarities(id:number){
    const collection = client.db(db_main).collection("color_similarities");
    await collection.deleteOne({id:id})
    await collection.updateMany({}, { $pull: {similarities:{id:id}} })
}

async function get_image_ids_from_color_similarities(){
    const collection = client.db(db_main).collection("color_similarities");
    // collection.find(selector).project({_id:0}).explain((_err,exp)=>console.log(exp))
     const ids =  collection.find({}).project({_id:0,similarities: 0}).toArray()
   return ids
    }
async function add_color_similarity_to_other_image(id:number,similarity:Record<string,unknown>){
    addToArrayInDocument("color_similarities",{id:id},{similarities:similarity })
}
async function add_color_similarities_by_id(id:number,similarities:Array<Record<string,unknown>>){
    insertDocuments("color_similarities", [{
        id:id,
        similarities:similarities
    }])
}
 
async function get_color_hist_by_id(id:number){
    const color_hists = findDocuments("color_hist", {id:id})
    return color_hists
}
async function get_all_color_hists(){
    const color_hists = findDocuments("color_hist", {})
    return color_hists
}

async function delete_color_hist_by_id(id:number){
    removeDocument("color_hist",{id:id})
}

async function add_color_hist_by_id(id:number, color_hist:number[][]){
    insertDocuments("color_hist", [{
        id:id,
        color_hist:color_hist
    }])
}

////////////////////////////////////////////////


/////////////////////////////////////////////////IMAGES OPS


async function add_tags_to_image_by_id(id:number,tags:string[]){
    await addToArrayInDocument("images",{id:id},{tags:{ $each:tags}})
}

async function get_ids_and_phashes(){
    const collection = client.db(db_main).collection("images");
    const data = collection.aggregate([{ $project : { id : 1, phash : 1,_id : 0} }]).toArray()
    return data
}

async function update_image_data_by_id(id:number,update:Record<string,unknown>){
    updateDocument("images", {id: id},update)
}

async function get_all_images(){
    const imgs = findDocuments("images", {})
    return imgs
}

async function find_images_by_tags(query:any){
    const imgs = findDocuments("images",query)
    return imgs
}
async function find_image_by_sha512(hash:string){
    const img = findDocuments("images", {
        sha512: hash
    })
    return img
}
async function find_image_by_id(id:number){
    const img = findDocuments("images", {
        id: id
    })
    return img
}
async function find_image_by_booru_id(booru:string,id:number){
    const img = findDocuments("images", {
        booru:booru,
        booru_id: id
    })
    return img
}
async function find_image_by_phash(hash:string){
    const img = findDocuments("images", {
        phash: hash
    })
    return img
}

async function get_max_image_id(){
    const collection = client.db(db_main).collection("images");
    const result = await collection.find({}).sort({id:-1}).limit(1).toArray()
    return result[0]?.id
}
async function delete_image_by_id(id:number){
    return removeDocument("images",{id:id})
}
async function add_image_by_object(image:any){
    return insertDocuments("images", [image])
}

async function add_image(id:number,file_ext:string,width:number,height:number,author:string,
    size:string,booru_link:string, 
    booru_likes:number,booru_dislikes:number,
    booru_id:number,booru_date:Date,source_url:string,tags:Array<string>,wilson_score:number,sha512:string,phash:string,description:string,booru:string){
    insertDocuments("images", [{
        id:id,
        file_ext:file_ext,
        created_at: new Date(),
        width:width,
        height:height,
        author: author,
        description:description,
        size:size,
        phash:phash,
        sha512:sha512,
        tags:tags,
        booru:booru,
        booru_id:booru_id,
        booru_likes:booru_likes,
        booru_dislikes:booru_dislikes,
        booru_link:booru_link,
        booru_date:booru_date,
        source_url:source_url,
        wilson_score:wilson_score
    }])
}
/////////////////////////////////////////////////////////

////////////////////////////////////////PASSWORD RECOVERY
async function update_user_password_by_id(id:string,password:string):Promise<void> {
    updateDocument("users", {id: id},{password:password})
}

async function delete_password_recovery_token(token:string):Promise<void> {
    removeDocument("password_recovery", {
        token: token
    })
}

async function save_password_recovery_token(token:string, user_id:string):Promise<void> {
    insertDocuments("password_recovery", [{
        "createdAt": new Date(),
        token: token,
        user_id: user_id,
    }])
}

async function find_user_id_by_password_recovery_token(token:string) {
    const user = findDocuments("password_recovery", {
        token: token
    })
    return user
}
//////////////////////////////////////////

//////////////////////////////////////////ACTIVATED USER

async function find_user_by_email(email:string) {
    const user = findDocuments("users", {
        email: email
    })
    return user
}

async function find_user_by_oauth_id(oauth_id:string) {
    const user = findDocuments("users", {
        oauth_id: oauth_id
    })
    return user
}

 async function find_user_by_id(id:string) {
    const user = findDocuments("users", {
        id: id
    })
    return user
}

async function create_new_user_activated(email:string, pass:string) {
    const id=await generate_id()
    insertDocuments("users", [{
        email: email,
        id: id,
        password: pass,
        username:"",
        links:0,
        activated: true
    }])
}


async function create_new_user_activated_github(oauth_id:string) {
    const id=await generate_id()
    insertDocuments("users", [{
        oauth_id: oauth_id,
        id: id,
        username:"",
        links:0,
        activated: true
    }])
    return id
}

async function create_new_user_activated_google(oauth_id:string,email:string) {
    const id=await generate_id()
    insertDocuments("users", [{
        oauth_id: oauth_id,
        email_google:email,
        id: id,
        username:"",
        links:0,
        activated: true
    }])
    return id
}
/////////////////////////////////////////////////////////


//////////////////////////////////////////NOT ACTIVATED USER
async function find_not_activated_user_by_token(token:string) {
    const user = findDocuments("not_activated_users", {
        token: token
    })
    return user
}

async function delete_not_activated_user_by_token(token:string) {
    removeDocument("not_activated_users", {
        token: token
    })
}

async function create_new_user_not_activated(email:string, pass:string, token:string) {
    insertDocuments("not_activated_users", [{
        "createdAt": new Date(),
        email: email,
        token: token,
        password: pass,
        activated: false
    }])
}
/////////////////////////////////////////////////////////

export default {
    image_ops: {
        add_image,
        add_image_by_object,
        get_all_images,
        find_image_by_id,
        get_max_image_id,
        delete_image_by_id,
        find_images_by_tags,
        get_ids_and_phashes,
        find_image_by_phash,
        find_image_by_sha512,
        find_image_by_booru_id,
        update_image_data_by_id,
        add_tags_to_image_by_id
    },
    image_search:{
        delete_sift_feature_by_id,
        add_sift_features_by_id,
        get_sift_features_batch,
        get_sift_features_by_id,
        get_number_of_images_sift_reverse_search,
        get_all_color_hists,
        get_color_hist_by_id,
        add_color_hist_by_id,
        delete_color_hist_by_id,
        get_color_similarities_by_id,
        add_color_similarities_by_id,
        delete_id_from_color_similarities,
        add_color_similarity_to_other_image,
        get_image_ids_from_color_similarities,
    },
    password_recovery:{
        update_user_password_by_id,
        delete_password_recovery_token,
        save_password_recovery_token,
        find_user_id_by_password_recovery_token
    },
    activated_user:{
        find_user_by_email,
        find_user_by_oauth_id,
        find_user_by_id,
        create_new_user_activated,
        create_new_user_activated_github,
        create_new_user_activated_google,
    },
    not_activated_user:{
        find_not_activated_user_by_token,
        delete_not_activated_user_by_token,
        create_new_user_not_activated
    }
}