document.addEventListener('DOMContentLoaded', async function () {
    setInterval(loadReceivedFiles, 3000); // Call loadReceivedFiles every 3000 ms (3 seconds)

    const backupButton = document.getElementById('backup-dir');
    const shareButton = document.getElementById('share-dir');
    const departmentButton = document.getElementById('department-dir');

    const changeInfoButton = document.getElementById('change-info');
    const shareFileButton = document.getElementById('share-file');

    const manageUsersButton = document.getElementById('manage-users');
    const manageDepartmentsButton = document.getElementById('manage-departments');

    const resetDatabaseButton = document.getElementById('reset-database');
    const restoreBackupButton = document.getElementById('restore-backup');

    const logoutButton = document.getElementById('logout');

    const disclaimerModal = document.getElementById('disclaimer-modal');
    const cancelDisclaimerButton = document.getElementById('disclaimer-cancel');
    const submitDisclaimerButton = document.getElementById('disclaimer-submit');

    await fetchUserInfo();
    await checkAndSetAllDirectories();

    backupButton.addEventListener('click', async function () {
        await setPath('backupDirectory');
    });

    shareButton.addEventListener('click', async function () {
        await setPath('shareDirectory');
    });

    departmentButton.addEventListener('click', async function () {
        await setPath('departmentDirectory');
    });

    changeInfoButton.addEventListener('click', function () {
        fadeOut('profile');
    });

    shareFileButton.addEventListener('click', function () {
        fadeOut('share_file');
    });

    manageUsersButton.addEventListener('click', function () {
        fadeOut('users_management');
    });

    manageDepartmentsButton.addEventListener('click', function () {
        fadeOut('departments_management' +
            '');
    });

    resetDatabaseButton.addEventListener('click', function () {
        disclaimerModal.style.display = 'block'; // Show disclaimer modal
    });

    cancelDisclaimerButton.addEventListener('click', function () {
        disclaimerModal.style.display = 'none'; // Hide modal if cancel is clicked
    });

    submitDisclaimerButton.addEventListener('click', async function () {
        disclaimerModal.style.display = 'none'; // Hide modal
        await resetDatabase(); // Perform database reset
        fadeOut('login'); // Fade out and go back to login
    });

    logoutButton.addEventListener('click', async function () {
        fadeOut('login');
    });

    restoreBackupButton.addEventListener('click', async function () {
        await restoreBackup();
    });

    async function restoreBackup() {
        const backupDirectory = await window.electronAPI.readApplicationInfo('backupDirectory');

        if (backupDirectory && backupDirectory.path) {
            await window.electronAPI.showAlert('You have already set a backup directory. You cannot restore again.');
            return;
        }

        const destinationPath = await window.electronAPI.selectDirectory();
        if (!destinationPath) return;

        await window.electronAPI.startBackupRetrieval(destinationPath);
        fadeOut('backup_retrieve');
    }

    async function checkAndSetAllDirectories() {
        await attachNotificationButton('backupDirectory', 'Set your backup directory!', 'backup_alert', 'alert');
        await attachNotificationButton('shareDirectory', 'Set your share directory!', 'share_alert', 'alert');
        await attachNotificationButton('departmentDirectory', 'Set your department directory!', 'department_alert', 'alert');
    }

    async function checkPathExistence(pathKey) {
        return await window.electronAPI.readApplicationInfo(pathKey);
    }

    async function setPath(pathKey) {
        const path = await window.electronAPI.selectDirectory();
        if (path === undefined) return;

        const id = await window.electronAPI.createMemoryEntry()
        console.log({id, path})
        await window.electronAPI.writeApplicationInfo(pathKey, {id, path});
    }

    async function attachNotificationButton(pathKey, buttonText, buttonId, buttonName) {
        const path = await checkPathExistence(pathKey);
        if (!path) {
            const notificationsDiv = document.getElementById('notifications');
            const button = document.createElement('button');
            button.id = buttonId;
            button.name = buttonName;
            button.textContent = buttonText;
            button.addEventListener('click', async function () {
                await setPath(pathKey);
                button.remove();
            });
            notificationsDiv.appendChild(button);
        }
    }

    async function fetchUserInfo() {
        const usernameField = document.getElementById('username-field');
        let userInfo = await window.electronAPI.readUserConfig('user_info');
        if (userInfo && userInfo.name) {
            usernameField.textContent = userInfo.name;
        } else {
            console.error("Username field is not available in the DOM.");
        }
    }

    async function loadReceivedFiles() {
        const shareDirectoryData = await window.electronAPI.readApplicationInfo('shareDirectory');
        if (!shareDirectoryData || !shareDirectoryData.id) {
            console.log('No received files or directory ID found.');
            return;
        }

        const directoryId = shareDirectoryData.id;
        const directoryStructure = await window.electronAPI.readMemoryEntry(directoryId);
        if (!directoryStructure || !directoryStructure.structure) {
            console.log('No received files found in the directory structure.');
            return;
        }

        const notificationsDiv = document.getElementById('notifications');
        const existingButtons = Array.from(notificationsDiv.children).map(button => button.getAttribute('data-filepath'));

        Object.keys(directoryStructure.structure).forEach(userName => {
            const userFiles = directoryStructure.structure[userName];
            Object.keys(userFiles).forEach(fileName => {
                const filePath = userFiles[fileName];
                if (!existingButtons.includes(filePath)) {
                    const button = document.createElement('button');
                    button.setAttribute('data-filepath', filePath);
                    button.name = 'notification';
                    button.textContent = `You received a file "${fileName}" from ${userName}`;
                    button.addEventListener('click', () => handleFileReceivedButtonPressed(filePath, button));
                    notificationsDiv.appendChild(button);
                }
            });
        });
    }

    async function removeReceivedFile(filePath) {
        const shareDirectoryData = await window.electronAPI.readApplicationInfo('shareDirectory');
        if (!shareDirectoryData || !shareDirectoryData.id) {
            console.log('No directory ID found to update.');
            return;
        }

        const directoryId = shareDirectoryData.id;
        let directoryStructure = await window.electronAPI.readMemoryEntry(directoryId);

        if (directoryStructure && directoryStructure.structure) {
            for (let userName in directoryStructure.structure) {
                let userFiles = directoryStructure.structure[userName];
                if (userFiles[filePath]) {
                    delete userFiles[filePath];
                    if (Object.keys(userFiles).length === 0) {
                        delete directoryStructure.structure[userName];
                    }
                    await window.electronAPI.updateMemoryEntry(directoryId, directoryStructure);
                    console.log(`File ${filePath} removed from memory.`);
                    return;
                }
            }
        } else {
            console.log('No directory structure found in memory to update.');
        }
    }

    async function handleFileReceivedButtonPressed(filePath, button) {
        await window.electronAPI.showFileInExplorer(filePath)
            .then(() => console.log('File explorer opened for: ' + filePath))
            .catch(error => console.error('Error opening file explorer:', error));

        button.remove();
        await removeReceivedFile(filePath);
    }

    async function resetDatabase() {
        const operationCodes = await window.electronAPI.getOperationsCodes();
        if (!operationCodes) {
            await window.electronAPI.showAlert('Internal error of the application. Failed to retrieve operation codes.');
            return;
        }

        const codeOk = operationCodes.OK;
        const codeResetDatabase = operationCodes.RESET_DATABASE;

        if(!await window.electronAPI.openUcSocket()){
            await window.electronAPI.showAlert('Internal application error.');
            return;
        }

        // Send the request to reset the database
        if (!await window.electronAPI.sendUcMessage(codeResetDatabase)) {
            await window.electronAPI.showAlert('Failed to send reset database request.');
            return;
        }

        // Wait for the response
        await waitForResponse();
        await window.electronAPI.changeContent('login');
    }

});