/*
Copyright (c) 2023-forever Douglas Malnati. All rights reserved.

See the /faq/tos page for details.
    
(If this generated header is stamped on a file which is a 3rd party file or under a different license or copyright, then ignore this copyright statement and use that file's terms.)
*/

import * as utl from '/js/Utl.js';

import { Base } from './Base.js';
import { TabularData } from '../../../../js/TabularData.js';



export class WsprSearchUiFlightStatsController
extends Base
{
    constructor(cfg)
    {
        super();

        this.cfg = cfg;

        this.ok = this.cfg.container;

        if (this.ok)
        {
            this.ui = this.#MakeUI();
            this.cfg.container.appendChild(this.ui);
        }
    }

    SetDebug(tf)
    {
        super.SetDebug(tf);

        this.t.SetCcGlobal(tf);
    }

    OnEvent(evt)
    {
        if (this.ok)
        {
            switch (evt.type) {
                case "DATA_TABLE_RAW_READY": this.#OnDataTableRawReady(evt); break;
            }
        }
    }

    #OnDataTableRawReady(evt)
    {
        this.t.Reset();
        this.t.Event(`WsprSearchUiFlightStatsController::OnDataTableRawReady Start`);

        // clear existing child nodes
        this.cfg.container.innerHTML = "";

        // get handle to data
        let td = evt.tabularDataReadOnly;

        // calculate distance stats
        let distKm = 0;
        let distMi = 0;

        td.ForEach((row) => {
            distKm += td.Get(row, "DistKm");
            distMi += td.Get(row, "DistMi");
        });

        // calculate spot stats
        let spotCount = td.GetDataTable().length - 1;

        // calculate duration stats
        let durationStr = "";
        if (td.Length() > 1)
        {
            let dtFirst = td.Get(td.Length() - 1, "DateTimeLocal");
            let dtLast = td.Get(0, "DateTimeLocal");
            
            let msFirst = utl.ParseTimeToMs(dtFirst);
            let msLast = utl.ParseTimeToMs(dtLast);
            
            let msDiff = msLast - msFirst;
            durationStr = utl.MsToDurationStrDaysHoursMinutes(msDiff);
        }

        // calculate eastward laps around world using resolved location
        let lapCount = this.#CalculateEastwardLapCount(td);

        // create summary
        let status = 
        `
Flight duration: ${durationStr}
<br/>
<br/>
Laps around world: ${utl.Commas(lapCount)}
<br/>
<br/>
Distance Traveled Km: ${utl.Commas(Math.round(distKm))}
<br/>
Distance Traveled Mi: ${utl.Commas(Math.round(distMi))}
<br/>
<br/>
Spots: ${utl.Commas(spotCount)}
        `;

        // update UI
        this.ui.innerHTML = status;
        
        // replace with new
        this.cfg.container.appendChild(this.ui);

        this.t.Event(`WsprSearchUiFlightStatsController::OnDataTableRawReady End`);
    }

    #MakeUI()
    {
        this.ui = document.createElement('div');

        return this.ui;
    }

    #CalculateEastwardLapCount(td)
    {
        let lonList = [];

        // Table is newest-first, so iterate oldest -> newest.
        for (let idx = td.Length() - 1; idx >= 0; --idx)
        {
            let lon = td.Get(idx, "Lng");
            if (lon == undefined || lon == null || lon === "")
            {
                continue;
            }

            lon = Number(lon);
            if (Number.isFinite(lon))
            {
                lonList.push(lon);
            }
        }

        if (lonList.length < 2)
        {
            return 0;
        }

        // Unwrap longitude so east/west movement is continuous across +/-180.
        let unwrappedLonList = [lonList[0]];
        for (let i = 1; i < lonList.length; ++i)
        {
            let prevRaw = lonList[i - 1];
            let curRaw = lonList[i];

            let delta = curRaw - prevRaw;
            if (delta > 180) { delta -= 360; }
            if (delta < -180) { delta += 360; }

            let nextUnwrapped = unwrappedLonList[unwrappedLonList.length - 1] + delta;
            unwrappedLonList.push(nextUnwrapped);
        }

        let startLon = unwrappedLonList[0];
        let lapCount = 0;

        // Count only eastward full wraps past start + 360n.
        for (let i = 1; i < unwrappedLonList.length; ++i)
        {
            let prevRel = unwrappedLonList[i - 1] - startLon;
            let curRel = unwrappedLonList[i] - startLon;

            while (prevRel < (lapCount + 1) * 360 && curRel >= (lapCount + 1) * 360)
            {
                ++lapCount;
            }
        }

        return lapCount;
    }
}