{{ define "single_calc" }}

<div class="modal fade" data-bs-backdrop="static" data-bs-keyboard="false" id="singleCalcModal" tabindex="-1">
    <div class="modal-dialog modal-dialog-centered">
        <div class="modal-content">
            <div class="modal-header">
                <h1 class="modal-title fs-3 text-success fw-bold" id="singleCalcModalLabel">Einzel-Abfrage</h1>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <div class="form-floating">
                    <input type="text" class="form-control form-control-lg pb-1" id="singleCalcPlayerName" placeholder="Spieler-Name" required>
                    <label for="singleCalcPlayerName">Spieler-Name</label>
                </div>
                <div class="text-warning fs-5 badge mt-2" id="resultScore" style="display: none;"></div>
                <div class="error-message text-danger fs-5 badge mt-2" style="display: none;"></div>
            </div>
            <div class="modal-footer">
                <button type="submit" name="submit" class="btn btn-lg btn-primary">Berechnen</button>
                <button type="button" class="btn btn-lg btn-secondary" data-bs-dismiss="modal">Schließen</button>
            </div>
        </div>
    </div>
</div>

<script lang="javascript">
    document.addEventListener('DOMContentLoaded', function() {
        const singleCalcModal = document.getElementById('singleCalcModal');
        let submitScoreHandler = null;

        const submitButton = singleCalcModal.querySelector('button[name="submit"]');
        const playerName = singleCalcModal.querySelector('#singleCalcPlayerName');
        const errorDiv = singleCalcModal.querySelector('.error-message');
        const resultScore = singleCalcModal.querySelector('#resultScore');
        const spinner = '<span class="spinner-border spinner-border-sm me-2" role="status"></span>Lade Daten...'

        function validateInput() {
            if (playerName.value.length < 1) {
                playerName.classList.add('is-invalid');
                return false;
            }
            playerName.classList.remove('is-invalid');
            return true;
        }

        function createSubmitScoreHandler(_) {
            return function submitScoreHandler(_) {
                if (!validateInput())
                    return;

                submitButton.innerHTML = spinner;
                submitButton.disabled = true;
                resultScore.style.display = 'none';
                playerName.disabled = true;

                fetch("/score/" + playerName.value, {
                    method: "POST",
                    body: JSON.stringify({
                        name: playerName.value
                    }),
                    headers: {
                        "Content-type": "application/json; charset=UTF-8"
                    }
                })
                    .then(response => {
                        if (response.status === 404) {
                            throw new Error('Berechnung fehlgeschlagen!\nSpielername existiert nicht.');
                        } else if (response.status === 503 || response.status === 504) {
                            throw new Error('Berechnung fehlgeschlagen!\nTracker überlastet. Versuche es später erneut.');
                        } else if (!response.ok) {
                            throw new Error('Berechnung fehlgeschlagen!\nName ungültig oder Tracker nicht erreichbar.');
                        }
                        return response.text();
                    })
                    .then((response) => {
                        resultScore.innerText = 'Spieler hat ' + response + ' Punkte.';
                        resultScore.style.display = 'block';
                    }).catch((error) => {
                        errorDiv.innerText = error.message;
                        errorDiv.style.display = 'block';
                    }).finally(() => {
                        submitButton.innerHTML = 'Berechnen';
                        submitButton.disabled = false;
                        playerName.disabled = false;
                    });
            }
        }

        if (singleCalcModal) {
            singleCalcModal.addEventListener('show.bs.modal', event => {
                submitScoreHandler = createSubmitScoreHandler(event);
                submitButton.addEventListener('click', submitScoreHandler);
            });

            singleCalcModal.addEventListener('keypress', event => {
                if (event.key === 'Enter') {
                    submitButton.click();
                }
            });

            singleCalcModal.addEventListener('hidden.bs.modal', _ => {
                submitButton.removeEventListener('click', submitScoreHandler);

                playerName.value = "";
                errorDiv.innerText = "";
                errorDiv.style.display = 'none';
                resultScore.innerText = "";
                resultScore.style.display = 'none';
                playerName.classList.remove('is-invalid');
            });
        }
    });
</script>

{{ end }}