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<div class="banner-info">
    <div class="container">
        <div class="row">
            <div class="col-sm-12">
                <div class="row-padd mrb-10">
                    <h3>Careers With Us</h3>
                </div>
            </div>
        </div>
    </div>
</div>

<div class="career-sec">
    <div class="container">
        <div class="row">
            <div class="col-sm-12 col-md-8 left">
                <div class="inner">
                    <h3>Welcome to CostMasters “Careers”! </h3>
                    <p>We are inviting talented professionals & leaders at various levels in the field of Business
                        Development, .Net Developers, Cost Engineers, Project Management.</p>
                    <p>To apply, fill the form below.</p>

                    <div class="career-form">
                        <h4>Career Form</h4>
                        <form method="POST" id="submit_careers" action="<?= base_url('careers-with-us/save') ?>"
                            enctype="multipart/form-data">
                            <div class="row">
                                <div class="form-group col-sm-4">
                                    <label>Name<span class="c_red">*</span> :</label>
                                    <input name="c_name" type="text" class="text_field form-control" id="c_name">
                                     <span id="c_name_err" class="error"></span>
                                </div>

                                <div class="form-group col-sm-4">
                                    <label>Mobile Number<span class="c_red">*</span> : </label>
                                    <div class="input-group" style="display: flex;">
                                        <input name="c_mobile" type="tel" id="c_mobile" class="text_field form-control" placeholder="">
                                        <div class="input-group-append">
                                            <button type="button" class="btn btn-sm btn-primary c_send-otp-btn"
                                                id="c_send_otp_btn" onclick="sendOtp(this)" style="display:none;">OTP</button>
                                            <i class="fa fa-check-circle text-success" id="c_otp_verified_tick" style="display: none;"></i>
                                        </div>
                                    </div>
                                    <span id="c_mobile_err" class="error"></span>
                                </div>

                                <div class="form-group col-sm-4 c_otp-group" id="c_verify_otp" style="display: none;">
                                    <div class="input-group">
                                        <input type="text" class="otp-box" name="c_otp_digit1" id="c_otp_digit1"
                                            maxlength="1" required>
                                        <input type="text" class="otp-box" name="c_otp_digit2" id="c_otp_digit2"
                                            maxlength="1" required>
                                        <input type="text" class="otp-box" name="c_otp_digit3" id="c_otp_digit3"
                                            maxlength="1" required>
                                        <input type="text" class="otp-box" name="c_otp_digit4" id="c_otp_digit4"
                                            maxlength="1" required>
                                       <div class="d-flex align-items-center gap-2">
                                        <button type="button" class="btn btn-sm btn-primary verify c_verify-otp-btn"
                                            id="c_verify_otp_btn" onclick="verifyOtp()" style="display:none;">Verify</button>
                                        <button type="button" class="btn btn-sm btn-primary verify c_cancel-btn"
                                        data-otp-group="c_otp-group" >Cancel</button> 
                                        <button type="button" class="btn btn-link" id="c_resendOtpBtn"
                                            style="display: none;" onclick="resendOtp()">Resend OTP</button> </div>                        
                                    <span id="c_otp_verification"></span>
                                    <p id="c_otp_timer" style=" display: none;">
                                        <span id="c_otpTimer"></span>                                      
                                    </p>
                                </div>
                                </div>

                                <div class="form-group col-sm-4">
                                    <label>E-mail Address<span class="c_red">*</span> :</label>
                                    <input name="c_email" type="email" class="text_field form-control" id="c_email">
                                      <span id="email_err" class="error"></span>

                                </div>

                                <div class="form-group col-sm-4">
                                    <label>Attach Resume<span class="c_red">*</span> :</label>
                                    <input class="text_field form-control" type="file" name="c_resume" id="c_resume"
                                        accept=".pdf" onchange="validateFileType()">
                                    <span id="resume_err" class="error"></span>
                                </div>

                                <div class="form-group col-sm-8">
                                    <label>Position of Interest<span class="c_red"></span> :</label>
                                    <select name="c_position" id="c_position" class="text_field form-control">
                                        <option value="">--Choose--</option>
                                        <?php foreach ($pos_interest as $pos): ?>
                                            <option value="<?= $pos['pos_name'] ?>"><?= $pos['pos_name'] ?></option>
                                        <?php endforeach; ?>
                                    </select>
                                    <span id="position_err" class="error"></span>

                                </div>

                                <div class="form-group col-sm-12">
                                    <label>Message:</label>
                                    <textarea name="c_info" class="text_area form-control" id="c_info"></textarea>
                                </div>
                                    
                                <input type="hidden" name="contactNo" class="contactNo" value="">

                                <div class="form-group col-sm-12">
                                    <input name="submit" class="textsubmit btn" id="submitButton"  value="Submit Application" type="submit">
                                </div>

                                <div class="form-group col-sm-12">
                                    <div id="loading" style="display:none;">
                                        <img src="<?= base_url('assets/frontend/images/ajax-loader.gif'); ?>" width="120" style="display: block; margin: 0px auto;" />
                                    </div>
                                    <div id="message"></div>
                                </div>
                            </div>
                        </form>
                    </div>
                </div>
            </div>

            <div class="col-sm-12 col-md-4 right">
                <div class="info">
                    <address>
                        <div>
                            <p><span>Address:</span><?= $footerContactAddr ?></p>
                        </div>
                    </address>
                    <address>
                        <div>
                            <p><span>Email Us:</span><a
                                    href="mailto:hr@costmasters.in">hr@costmasters.in</a></p>
                        </div>
                    </address>
                    <address>
                        <div>
                            <p><span>Call Us:</span><a
                                    href="tel:<?= $footerContactPhone ?>">+91-7009077082</a></p>
                        </div>
                    </address>
                </div>
            </div>
        </div>
    </div>
</div>

<script src="<?= base_url(); ?>assets/plugins/general/jquery/dist/jquery.js" type="text/javascript"></script>
<script>
    let otpTimeout;
    let isOtpVerified = false;

    function validateFileType() {
        var fileName = document.getElementById("c_resume").value;
        var idxDot = fileName.lastIndexOf(".") + 1;
        var extFile = fileName.substr(idxDot, fileName.length).toLowerCase();
        if (extFile != "pdf") {
            toastr.error("Only .pdf format files are allowed!");
            event.returnValue = false;
            document.getElementById("c_resume").value = "";
        }
    }

    // Initialize intl-tel-input
    let contactInput = document.querySelector("#c_mobile");
    let iti = window.intlTelInput(contactInput, {
        initialCountry: "in", // Default country
        separateDialCode: true,
        nationalMode: true,
        utilsScript: "https://cdnjs.cloudflare.com/ajax/libs/intl-tel-input/17.0.8/js/utils.js"
    });
    contactInput.setAttribute("placeholder", "");

    // Define country-specific phone number lengths
    const phoneLengthByCountry = {
        "IN": 10, "US": 10, "GB": 10, "JP": 10,
        "AE": 9, "FR": 9, "AU": 9
    };

    let lastValidNumber = ""
    // Restrict input length based on selected country
    $("#c_mobile").on("input", function () {
        let inputField = document.querySelector("#c_mobile");
        if (!inputField) return console.error("Element #c_mobile not found.");

        let itiInstance = window.intlTelInputGlobals?.getInstance(inputField);
        if (!itiInstance) return console.error("intlTelInput instance not found.");

        let countryData = itiInstance.getSelectedCountryData();
        let countryCode = countryData.iso2.toUpperCase();
        let maxLength = phoneLengthByCountry[countryCode] || 10;

        let phoneNumber = $(this).val().replace(/\D/g, ''); // Remove non-numeric characters
        $(this).val(phoneNumber.substring(0, maxLength)); // Restrict to country-specific length

        let formattedNumber = itiInstance.getNumber();
        let isValid = itiInstance.isValidNumber();

        if (isValid && formattedNumber !== lastValidNumber) {
            lastValidNumber = formattedNumber;
            sendOtp(inputField); // Send OTP
            $("#book_contact_error").text("").hide();
            $("#c_send_otp_btn").prop("disabled", false);
        } else {
            $("#c_send_otp_btn").prop("disabled", true);
            $("#book_contact_error").text("Invalid mobile number for " + countryData.name).css("color", "red").show();
        }
    });

    $("#c_mobile").attr("placeholder", "");

    // Validate phone number before form submission
    function validatePhoneNumber() {
        var contact = $('#c_mobile');

        if (contact.length === 0) {
            console.error("Phone input field not found!");
            return false;
        }

        var iti = window.intlTelInputGlobals.getInstance(contact[0]);

        if (!iti || !iti.isValidNumber()) {
            toastr.warning('Please enter a valid contact number.', 'Invalid Contact Number');
            contact.addClass('is-invalid');
            return false;
        } else {
            contact.removeClass('is-invalid');
        }

        var countryCode = iti.getSelectedCountryData().iso2.toUpperCase();
        var expectedLength = phoneLengthByCountry[countryCode] || 10;
        
        // Get the national number and remove non-digits
        var nationalNumber = iti.getNumber(intlTelInputUtils.numberFormat.NATIONAL).replace(/\D/g, '');
        console.log("Raw national number:", nationalNumber, "Length:", nationalNumber.length);
        
        // Optionally remove a leading zero if it exists:
        if (nationalNumber.charAt(0) === '0') {
            nationalNumber = nationalNumber.substring(1);
            console.log("National number after removing leading zero:", nationalNumber, "Length:", nationalNumber.length);
        }

        if (nationalNumber.length !== expectedLength) {
            toastr.warning('Invalid phone number length for ' + iti.getSelectedCountryData().name + '. Expected ' + expectedLength + ' digits.', 'Invalid Contact Number');
            contact.addClass('is-invalid');
            return false;
        }
        return true;
    }

    // Function to send OTP
    function sendOtp() {
    let contactNo = $('#c_mobile').val().trim();
        $.ajax({
            type: 'POST',
            url: '<?= base_url(); ?>api/send_otp',
            data: { contactNo: contactNo },
            dataType: 'json',
            success: function (response) {
                if (response.status === 'true') {
                    toastr.success('OTP sent successfully.', 'OTP Sent');
                    clearInterval(otpTimeout);
                    $('#c_verify_otp').show();
                    $('#c_send_otp_btn').hide();
                    $('#c_mobile').attr('readonly', true).css('background-color', '#f5f5f5');
                    startOtpTimer();
                } else {
                    toastr.error('Failed to send OTP.', 'Error');
                }
            },
            error: function () {
                toastr.error('Failed to send OTP.', 'Error');
            }
        });
    }

    $(document).on('click', '.c_cancel-btn', function () {
        $('.c_otp-group').hide();
        $('#c_resendOtpBtn').hide();
        $('#c_mobile').attr('readonly', false).css('background-color', '#fff');
        $('.otp-box').val('');
        if (otpTimeout) {
            clearInterval(otpTimeout);
            otpTimeout = null; // Reset to prevent future issues
        }
        $('#c_otp_timer').hide();
    });

    // Function to start the OTP timer
    function startOtpTimer() {
        let countdown = 60; // 60 seconds
        $('#c_resendOtpBtn').hide();

        $('#c_otp_timer').show();
        $('#c_otpTimer').text(`Resend OTP in ${countdown} seconds`);
        otpTimeout = setInterval(function () {
            countdown--;
            $('#c_otpTimer').text(`Resend OTP in ${countdown} seconds`);
            if (countdown <= 0) {
                clearInterval(otpTimeout);
                $('#c_otpTimer').text('');
                $('#c_resendOtpBtn').show();
            }
        }, 1000);
    }

    // Function to resend OTP
    function resendOtp() {
        let contactNo = $('#c_mobile').val().trim();
        if (validatePhoneNumber(contactNo)) {
            $.ajax({
                type: 'POST',
                url: '<?= base_url(); ?>api/send_otp',
                data: { contactNo: contactNo },
                dataType: 'json',
                success: function (response) {
                    if (response.status === 'true') {
                        toastr.success('OTP sent successfully.', 'OTP Sent');
                        clearInterval(otpTimeout);
                        startOtpTimer(); // Restart timer
                    } else {
                        toastr.error('Failed to send OTP.', 'Error');
                    }
                },
                error: function () {
                    toastr.error('Failed to send OTP.', 'Error');
                }
            });
        } else {
            toastr.error('Invalid Mobile number.', 'Error');
        }
    }

    function getCombinedOtp() {
        return $('.otp-box').map(function() {
            return $.trim($(this).val());
        }).get().join('');
    }

    function verifyOtp() {
        // Get OTP values from input fields
        let otp = getCombinedOtp();

        // Validate OTP (4 digits, numeric)
        if (otp.length !== 4 || isNaN(otp)) {
            toastr.error('Invalid OTP. Please enter a 4-digit numeric OTP.', 'Error');
            return;
        }
        let contact_No = $('#c_mobile').val().trim();
        let selectedCountry = iti.getSelectedCountryData();
        let countryCode = selectedCountry.iso2;
        // Get contact number safely
        let contactNo = (typeof iti !== 'undefined') ? iti.getNumber() : '';
        if (!contactNo) {
            toastr.error('Invalid or missing contact number.', 'Error');
            return;
        }

        // Prevent multiple clicks
        $('#c_verifyOtpBtn').prop('disabled', true);

        $.ajax({
            type: 'POST',
            url: '<?= base_url(); ?>api/verify_otp',
            data: { countryCode: countryCode || null, contact_no: contact_No, otp: otp },
            dataType: 'json',
            success: function (response) {
                if (response.status === 'true') {
                    toastr.success('OTP verified successfully!', 'Success');
                    isOtpVerified = true; 

                    // Hide buttons and disable inputs after successful verification
                    $('#c_verifyOtpBtn, #c_resendOtpBtn').hide();
                    $('.c_otp-group').hide();
                    $('.otp-box').attr('readonly', true).css('background-color', '#f5f5f5');
                    $('#c_otp_verified_tick').show();
                } else {
                    toastr.error('Invalid OTP. Please try again.', 'Error');
                    $('#c_verifyOtpBtn').prop('disabled', false);
                }
            },
            error: function () {
                toastr.error('OTP verification failed. Please try again later.', 'Error');
                $('#c_verifyOtpBtn').prop('disabled', false);
            }
        });
    }


    // Handle OTP verification button click
    $('#c_verifyOtpBtn').on('click', function () {
        verifyOtp();
    });

    // Function to validate OTP input and trigger verification
    function validateOtp() {
        const otpValues = getCombinedOtp();
        console.log("Entered OTP:", otpValues);
        console.log("OTP Length:", otpValues.length);

        // Ensure OTP is exactly 4 digits and numeric
        if (!/^\d{4}$/.test(otpValues)) {
            toastr.error('Invalid OTP. Enter a 4-digit number.', 'Error');
            return;
        }

        let contactInput = document.querySelector("#c_mobile"); // Ensure correct ID
        let iti = window.intlTelInputGlobals.getInstance(contactInput);

        if (!iti) {
            toastr.warning('Phone input is not initialized.', 'Warning');
            return;
        }

        // Get number in NATIONAL format (without country code)
        let contactNo = iti.getNumber(intlTelInputUtils.numberFormat.NATIONAL) || contactInput.value.trim();
        // Clean up the number: Remove spaces and leading zeros
        contactNo = contactNo.replace(/\s+/g, '').replace(/^0+/, '');

        console.log("Entered Number (Raw):", contactInput.value);
        console.log("National Format Before Processing:", iti.getNumber(intlTelInputUtils.numberFormat.NATIONAL));
        console.log("Final Processed Contact Number (Without Country Code):", contactNo);

        if (iti.isValidNumber() && contactNo.length > 0) {
            // Use the verify button element to trigger verification
            let verifyButton = document.getElementById('c_verify_otp_btn');
            if (verifyButton) {
                verifyOtp(verifyButton);
            } else {
                toastr.warning('Verification button not found.', 'Warning');
            }
        } else {
            toastr.warning('Invalid or missing contact number.', 'Warning');
        }
    }

    // Add event listeners to OTP input fields
    document.querySelectorAll('.otp-box').forEach((box, index, boxes) => {
        box.addEventListener('input', function () {
            // Move to the next box if a digit is entered
            if (this.value.length === 1 && index < boxes.length - 1) {
                boxes[index + 1].focus();
            }

            // Validate OTP when the 4th digit is entered
            if (index === boxes.length - 1 && this.value.length === 1) {
                validateOtp();
            }
        });

        box.addEventListener('keydown', function (e) {
            // Move to the previous box on Backspace if the current box is empty
            if (e.key === 'Backspace' && this.value.length === 0 && index > 0) {
                boxes[index - 1].focus();
            }
        });
    });

    // Attach click event handler to submit button
    $("#submitButton").click(function(e) {
        e.preventDefault();

        // Assume the form is valid initially
        let isValid = true;

        // Clear previous Toastr notifications
        toastr.clear();

        // Clear previous error highlights
        $(".error-input").removeClass("error-input");

        // Initialize an array to store error messages
        let errorMessages = [];

        // Validate OTP
        if (!isOtpVerified) {
            isValid = false;
            errorMessages.push("Please verify your mobile number by entering the OTP.");
            $('#c_otp').addClass("error-input");
        }

        // Validate Name field
        const name = $('#c_name').val().trim();
        if (name === "" || !/^[A-Za-z\s]+$/.test(name)) {
            isValid = false;
            errorMessages.push("Name is required and must contain only letters.");
            $('#c_name').addClass("error-input");
        }

        // ✅ Validate Mobile (International Support)
        let mobile = iti.getNumber();
        $(".contactNo").val(mobile);

        let isMobileValid = iti.isValidNumber();
        if (!isMobileValid) {
            isValid = false;
            errorMessages.push("Enter a valid mobile number.");
            $('#c_mobile').addClass("error-input");
        }

        // Validate Email field
        const email = $('#c_email').val().trim();
        const emailPattern = /^[a-zA-Z0-9._-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,6}$/;
        if (!emailPattern.test(email)) {
            isValid = false;
            errorMessages.push("Enter a valid email address.");
            $('#c_email').addClass("error-input");
        }

        // Validate Position field
        const position = $('#c_position').val().trim();
        if (position === "") {
            isValid = false;
            errorMessages.push("Please select a position.");
            $('#c_position').addClass("error-input");
        }

        // Validate Resume file - required and PDF format
        const fileInput = $('#c_resume')[0];
        const file = fileInput.files[0];
        if (!file || file.type !== "application/pdf") {
            isValid = false;
            errorMessages.push("Only PDF files are allowed for resume.");
            $('#c_resume').addClass("error-input");
        }

        // Show toastr error messages if there are any validation issues
        if (!isValid) {
            toastr.error("Please correct the errors below.", "Submission Failed");
            errorMessages.forEach(function(message) {
                toastr.error(message);
            });
        }

        // Submit form if all fields are valid
        if (isValid) {
            const formData = new FormData($('#submit_careers')[0]);
            $('#loading').show();

            $.ajax({
                type: "POST",
                url: $("#submit_careers").attr('action'),
                data: formData,
                processData: false,
                contentType: false,
                dataType: 'json',
                success: function(data) {
                    $('#loading').hide();
                    console.log(data);

                    if (data.status === false) {
                        toastr.error("Please correct the errors below.", "Submission Failed");
                        $.each(data.errors, function(key, value) {
                            toastr.error(value);
                            $('#' + key).addClass("error-input"); // Highlight invalid fields from server-side validation
                        });
                    } else if (data.status === true) {
                        toastr.success(data.message, "Success");
                        $('#submit_careers')[0].reset();
                        $('#c_otp_verified_tick').hide();
                        $('#c_mobile').attr('readonly', false).css('background-color', '#fff');
                        $("html, body").animate({ scrollTop: $("#message").offset().top - 100 }, 1000);
                        sendEmailAfterSuccess(data.save_data);
                    }
                },
                error: function() {
                    $('#loading').hide();
                    toastr.error("An error occurred. Please try again later.", "Submission Error");
                }
            });
        }
    });

    // Remove error highlight on focus
    $(document).on("focus", ".error-input", function() {
        $(this).removeClass("error-input");
    });

    // CSS to highlight invalid fields
    $("<style>")
        .prop("type", "text/css")
        .html(`
            .error-input {
                border: 0.5px solid red !important;
                background-color: #ffebeb;
            }
        `)
        .appendTo("head");

    // Function to send email after success
    function sendEmailAfterSuccess(save_data) {
        $.ajax({
            type: 'POST',
            url: '<?php echo base_url(); ?>careers-with-us/send_email', // Adjust the URL for the email API
            data: { save_data: save_data}, // Send both data parameters
            dataType: 'json',
            success: function (response) {
                if (response.status) {
                    toastr.success(response.message, 'Success'); // Show success toastr message
                } else {
                    toastr.error(response.message, 'Error');
                }
            },
            error: function () {
                toastr.error('Error sending email. Please try again later.', 'Email');
            }
        });
    }
</script>