import {
    TextRun,
    patchDocument,
    PatchType,
  } from "https://esm.sh/docx@9.5.1";

  
function log(message)
{
    const output_text = document.getElementById("output_text");
    output_text.value = output_text.value + "\n" + message;
}

function progressStart()
{
    const progressbar = document.getElementById("progressbar");
    progressbar.classList.remove("hidden");
}

function progressDone()
{
    const progressbar = document.getElementById("progressbar");
    progressbar.classList.add("hidden");
}

function downloadBlob(blob, filename) {
    const url = URL.createObjectURL(blob);

    const tmpLink = document.createElement("a");
    tmpLink.style.display = "none";
    tmpLink.href = url;
    tmpLink.download = filename;
    document.body.appendChild(tmpLink);
    tmpLink.click();
    document.body.removeChild(tmpLink);
    URL.revokeObjectURL(url);
}

function sanitizeRecord(record)
{
    const noData="нет данных";
    for (var i = 0; i < record.length; ++i)
    {
        if ((""+record[i]).trim().toLowerCase() == noData)
        {
            record[i] = "";
        }
        else if(!record[i])
        {
            record[i] = "";
        }
    }
    return record;
}

// Помещение (квартира)  № {{APT_NUM}}
// СНИЛС  {{SNILS}}
// Ф.И.О. собственника помещения {{FIO}}
// Документ, подтверждающий право собственности: {{DOCUMENT_NUM}}
// Дата документа: {{DOCUMENT_DATE}}
// Общая площадь квартиры: {{APT_AREA}}
// Размер доли в праве собственности: {{SHARE}} 
async function populateBallot(template, record){
    try {
        record = sanitizeRecord(record);
        const ballot = await patchDocument({
            data: template,
            outputType: "arraybuffer",
            patches: {
                APT_NUM: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(""+record[2])],
                },
                FIO: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(""+record[3])],
                },
                APT_AREA: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(""+record[5])],
                },
                SHARE: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(""+record[6])],
                },
                DOCUMENT_NUM: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(""+record[8])],
                },
                DOCUMENT_DATE: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(record[9] != "" ? ("от "+record[9]) : "")],
                },
                SNILS: {
                    type: PatchType.PARAGRAPH,
                    children: [ new TextRun(""+record[10])],
                }
            },
        });
        
        return ballot;

    } catch (error) {
        console.error(`Error: ${error}`);
    }
};


async function generate()
{
    progressStart();
    let registry_file = document.getElementById("registry_file").files[0];
    let template_file = await document.getElementById("template_file").files[0].arrayBuffer();

    var dataset = await CSV.fetch({
        file: registry_file,
        delimiter: ";"
      }
    );
    log("Реестр загружен.");
    console.log(dataset);

    var zip = new JSZip();
    var ballots = {};
    
    for (const r of dataset.records)
    {
        const name = "ballot_"+ r[2];
        let filename = name + ".docx";
        let discriminator = 1;
        while(ballots[filename])
        {
            discriminator++;
            filename = name + "_" + discriminator + ".docx";
        }

        ballots[filename] = (async () => 
        {
            var file = await populateBallot(template_file, r);
            zip.file(filename, file);

        })();
    }
    
    for (const b in ballots) await ballots[b];

    var blob = await zip.generateAsync({type:"blob"});
    downloadBlob(blob, "ballots.zip");
    log("Готово!");

    progressDone();
}

async function asyncMain() {
    console.debug("in main");
    let generateButton = document.getElementById("create_ballots_btn");
    generateButton.onclick = generate;
}

if (document.readyState != "loading")
{
    asyncMain();
}
else
{
    window.onload = asyncMain;
}