//PDF generation API authored by Hassan Raza -- DGS/ETS/ESaaS 

function triggerFlow(recordid, data, flowUrl, fileName) {
    return new Promise((resolve, reject) => {
        if (typeof $ === "undefined") {
            console.error("jQuery not loaded");
            reject("jQuery not loaded");
            return;
        }

        console.log("Record ID:", recordid);
        console.log("Flow URL:", flowUrl);
        console.log("File Name:", fileName);

        let fileOpened = false;
        if (fileOpened) return;
        fileOpened = true;

        var payload = { eventData: JSON.stringify(data) };
        console.log("Payload:", payload);

        shell.ajaxSafePost({
            type: "POST",
            contentType: "application/json",
            url: flowUrl,
            data: JSON.stringify(payload),
            processData: false,
            global: false
        }).done(function(response) {
            console.log("Response received");
            const result = JSON.parse(response);
            console.log("Parsed Result:", result);

            if (result.document_content) {
                console.log("Processing document content");
                const byteCharacters = atob(result.document_content);
                const byteNumbers = Array.from(byteCharacters, char => char.charCodeAt(0));
                const byteArray = new Uint8Array(byteNumbers);
                const blob = new Blob([byteArray], { type: 'application/pdf' });
                const blobUrl = URL.createObjectURL(blob);

                var link = document.createElement("a");
                link.href = blobUrl;
                link.download = fileName;
                link.style.display = "none";

                document.body.appendChild(link);
                link.click();
                document.body.removeChild(link);

                console.log("PDF download initiated");
                resolve(true);  
            } else {
                console.error("PDF data not found");
                resolve(false);
            }
        }).fail(function(error) {
            console.error("Error occurred:", error);
            alert("An error occurred.");
            reject(error);
        });
    });
}