import Resolver from "../resolver.js";
import default_resolver from "./default.js";
import { create_object, get_max_len } from "../common.js";
// import xor from "./xor.js";
// import or from "./or.js";
// import not from "./not.js";

Resolver.prototype.and = function () {
    if (this.result.length) {

        const self = this;
        let args = arguments,
            first_argument = args[0];


        if (first_argument instanceof Promise) {
            return first_argument.then(function () {
                return self.and.apply(self, args);
            });
        }

        if (first_argument[0]) {
            // fix false passed parameter style
            if (first_argument[0].index) {
                return this.and.apply(this, first_argument);
            }
        }

        // for(let i = 0; i < args.length; i++){
        //     if(args[i].result instanceof Promise){
        //         return;
        //     }
        // }

        // if(args.length < 2){
        //     if(first_argument.index){
        //         first_argument.resolve = false;
        //         return first_argument.index.search(first_argument);
        //     }
        // }

        let final = [],
            promises = [],
            limit = 0,
            offset = 0,
            enrich,
            resolve;


        for (let i = 0, query; i < args.length; i++) {
            if (query = args[i]) {

                let result;
                if (query instanceof Resolver) {
                    result = query.result;
                } else if (query.constructor === Array) {
                    result = query;
                } else if (query.index) {
                    query.resolve = /* suggest */ /* append: */ /* enrich */!1;
                    result = query.index.search(query).result;
                } else if (query.or) {
                    result = this.or(query.or);
                } else if (query.xor) {
                    result = this.xor(query.xor);
                } else if (query.not) {
                    result = this.not(query.not);
                } else {
                    limit = query.limit || 0;
                    offset = query.offset || 0;
                    enrich = query.enrich;
                    resolve = query.resolve;
                    continue;
                }

                final[i] = result;

                if (result instanceof Promise) {
                    promises.push(result); //{ query, result };
                }
            }
        }

        if (promises.length) {
            return Promise.all(promises).then(function () {
                final = [self.result].concat(final);
                self.result = intersect(final, limit, offset, enrich, resolve, self.boostval);
                return resolve ? self.result : self;
            });
        }

        final = [this.result].concat(final);
        this.result = intersect(final, limit, offset, enrich, resolve, self.boostval);
        return resolve ? this.result : this;
    }
    return this;
};

/**
 * Aggregate the intersection of N raw results
 * @param result
 * @param limit
 * @param offset
 * @param enrich
 * @param resolve
 * @param boost
 * @return {Array}
 */

function intersect(result, limit, offset, enrich, resolve, boost) {

    // if(!result.length){
    //     // todo remove
    //     console.log("Empty Result")
    //     return result;
    // }

    if (2 > result.length) {
        // todo remove
        //console.log("Single Result")
        return [];
        // if(resolve){
        //     return default_resolver(result[0], limit, offset, enrich);
        // }
        // else{
        //     return result[0];
        // }
    }

    let final = [],
        count = 0,
        contain = create_object(),
        maxres = get_max_len(result);

    // fast path single slot
    // if(result.length < 2){
    //     if(limit || offset){
    //         let res = result[0];
    //         for(let j = 0, ids; j < res.length; j++){
    //             ids = res[j];
    //             if(!ids) continue;
    //             for(let k = 0, id; k < ids.length; k++){
    //                 id = ids[k];
    //                 if(offset){
    //                     offset--;
    //                     continue;
    //                 }
    //                 if(resolve){
    //                     final.push(id);
    //                 }
    //                 else{
    //                     final[j + this.boost] || (final[j + this.boost] = []);
    //                     final[j + this.boost].push(id);
    //                 }
    //                 if(limit && ++count === limit){
    //                     this.boost = 0;
    //                     return final;
    //                 }
    //             }
    //         }
    //     }
    //     this.boost = 0;
    //     return result[0];
    // }

    if (!maxres) return final;

    // for(let j = 0, ids, res = result[0]; j < res.length; j++){
    //     ids = res[j];
    //     for(let k = 0; k < ids.length; k++){
    //         contain[ids[k]] = 1;
    //     }
    // }

    for (let i = 0, res; i < result.length; i++) {
        res = result[i];
        if (!res || !res.length) return [];
        let contain_new = create_object(),
            match = 0,
            last_round = i === result.length - 1;


        for (let j = 0, ids; j < maxres; j++) {
            ids = res[j];
            if (!ids) continue;

            for (let k = 0, id, min; k < ids.length; k++) {
                id = ids[k];
                // fill in first round
                if (!i) {
                    // shift resolution +1
                    // shift resolution by boost (inverse)
                    contain_new[id] = j + 1 + (i ? boost : 0);
                    match = 1;
                }
                // result in last round
                else if (last_round) {
                        if (min = contain[id]) {
                            match = 1;
                            //if(!contain_new[id]){
                            if (offset) {
                                offset--;
                                continue;
                            }
                            if (resolve) {
                                final.push(id);
                            } else {
                                // reduce resolution -1
                                min--;
                                if (j < min) min = j;
                                final[min] || (final[min] = []);
                                final[min].push(id);
                            }
                            if (limit && ++count === limit) {
                                //this.boost = 0;
                                return final;
                            }
                            // shift resolution +1
                            //contain_new[id] = min + 1;
                            //}
                        }
                    }
                    // check for intersection
                    else if (min = contain[id]) {
                            // shift resolution +1
                            if (j + 1 < min) min = j + 1;
                            contain_new[id] = min;
                            match = 1;
                        }
            }
        }

        if (!match) {
            //this.boost = 0;
            return [];
        }

        contain = contain_new;
    }

    //this.boost = 0;
    return final;
}