"use strict";

const { getModel } = require( '../../../lib/Models' );
const { getPagination } = require( '../../../lib/Misc' );
const { GenericHandler } = require( '../../../lib/Handlers/Generic.handler' );
const { onPostEvent, onPatchEvent } = require('../../../lib/Handlers/Proposals.handler');
const Model = getModel('proposals');

const populate_list = [
    { path:'load' , populate : { path : 'categories' } },
    { path:'load' , populate : { path : 'company' } },
    'shipper',
    'carrier',
    'vehicle',
    { path:'vehicle' , populate : { path : 'driver' , select : { password : 0 , session_token : 0 , session_token_exp : 0 } } },
    { path:'bidder', select : { password : 0 , session_token : 0 , session_token_exp : 0 } },
    { path:'accepted_by', select : { password : 0 , session_token : 0 , session_token_exp : 0 } }
];
const generic = new GenericHandler( Model, null, populate_list );

function getAndFilterList( query ){
    const filter_list = [];
    const {
        shipper,
        carrier,
        load,
        categories,
        branch_name,
        phone,
        city,
        state,
        truck_type,
        is_accepted,
        is_withdrawn,
        is_completed,
    } = query;

    if( is_completed ) { filter_list.push({ is_completed }); }
    if( is_withdrawn ) { filter_list.push({ is_withdrawn }); }
    if( is_accepted ) { filter_list.push({ is_accepted }); }
    if( shipper ) { filter_list.push({ shipper }); }
    if( carrier ) { filter_list.push({ carrier }); }
    if( load ) { filter_list.push({ load }); }
    if( categories ) { filter_list.push({ categories }); }
    if( branch_name ) { filter_list.push({ branch_name }); }
    if( phone ) { filter_list.push({ phone }); }
    if( city ) { filter_list.push({ city }); }
    if( state ) { filter_list.push({ state }); }
    if( truck_type ) { filter_list.push({ truck_type }); }

    if( filter_list.length == 0 ){
        return null;
    }
    return filter_list;
}

async function findElements( query ){
    const { page, elements } = getPagination( query );
    const andFilterList = getAndFilterList( query );
    let filter;
    if( andFilterList ){
        filter = { $and : andFilterList };
    }else{
        filter = null;
    }
    const { total , limit, skip, data  } = await generic.getList( page , elements, filter );
    return {
        total,
        limit,
        skip,
        data:data
    };
}

async function findElementById( elementId , companyId ){
    const filter = {
        $and : [
            { _id : elementId },
            { $or :[
                { shipper : companyId },
                { carrier : companyId }
            ]}
        ]
    };
    let retVal = await Model.findOne( filter ).populate( populate_list ) || {};
    return retVal;
}

const findList = async(req, res) => {
    try{
        const query  = req.query || {};
        const retVal = await findElements( query );
        res.send( retVal );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const getById = async(req, res) => {
    try{
        const companyId = req.context.companyId;
        const elementId = req.params.id;
        res.send( await findElementById( elementId , companyId ) );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const patchProposal = async(req, res) => {
    try{
        const elementId = req.params.id;
        const proposal = await Model.findById( elementId );
        const data = req.body;
        if( !proposal ){
            throw "You can't modify this proposal";
        }
        if( !data ){
            throw "proposal data not sent";
        }
        await Model.findByIdAndUpdate( elementId , data );
        await onPatchEvent( req.context.userId, elementId, data );
        return res.send( await Model.findById( elementId ) );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const postProposal = async(req, res) => {
    try{
        const data = req.body;
        if( !data ){
            throw "proposal data not sent";
        }
        const proposal = new Model( data );
        await proposal.save();

        await onPostEvent( req.context.userId, proposal.id, data);
        return res.send( proposal );
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

const deleteProposal = async(req, res) => {
    try{
        const elementId = req.params.id;
        const proposal = await Model.findById( elementId );
        if(!proposal){
            throw "You can't delete this proposal";
        }
        await Model.findByIdAndDelete( elementId );
        return res.send(proposal);
    }catch(error){
        console.error( error );
        return res.status( 500 ).send({ error });
    }
};

module.exports = { findList, getById, patchProposal, postProposal, deleteProposal };