<?php
include 'functions/init.php';

error_log('RECEIVED: ' . pretty_dump($_POST));
if (isset($_POST['ajaxId'])) {
    switch ($_POST['ajaxId']) {
        case 'login':
            handle_login();
            break;
        case 'loginHTML':
            handleLoginHTML();
            break;
        case 'signupHTML':
            handleSignupHTML();
            break;
        case 'usernameCheck':
            handleUsernameCheck();
            break;
        case 'logout':
            User::logout();
            break;
        case 'newPostHTML':
            handleNewPostHTML();
            break;
        case 'newSpaceHTML':
            handleNewSpaceHTML();
            break;
        case 'deletePost':
            handleDeletePost();
            break;
        case 'deleteSpace':
            handleDeleteSpace();
            break;
    }
} else if (isset($_POST['formID'])) {
    switch ($_POST['formID']) {
        case 'spaceNew':
            break;
        case 'signup':
            handleSignup();
            break;
        case 'newPost':
            handleNewPost();
            break;
        case 'newSpace':
            handleNewSpace();
            break;
    }

    if (!isset($_POST['redirect']))
        header('Location: .');
    else
        header('Location: ' . $_POST['redirect']);
}

function handleDeleteSpace()
{
    if (!isset($_POST['id'])) {
        echo json_encode(['error' => 'Missing required Space ID.']);
        return;
    }

    $stmt = 'DELETE FROM spaceMembers where space = ?';
    exec_stmt($stmt, 'i', $_POST['id']);

    $stmt = 'DELETE FROM space WHERE id = ?';
    exec_stmt($stmt, 'i', $_POST['id']);
}

function handleNewSpace()
{
    if (!isset($_POST['name']) || !isset($_POST['description']) || !isset($_POST['visibility'])) {
        error_log('ruh roh');
        return;
    }

    $id = randomId(2) * -1;
    /* $name = htmlspecialchars($_POST['name'], ENT_QUOTES, 'UTF-8'); */
    /* $description = htmlspecialchars($_POST['description'], ENT_QUOTES, 'UTF-8'); */
    $space = new Space($id, $_POST['name'], $_POST['description'], $_POST['visibility'], null, null, isset($_POST['space']) ? Space::retrieveFromDB($_POST['space']) : null, true);
    error_log(pretty_dump($space));
    Space::addUserToSpace(unserialize($_SESSION['user'])->getId(), $id * -1, 1, true);
}

function handleNewPost()
{
    if (!isset($_POST['postType']) || !isset($_POST['space']))
        return;

    switch ($_POST['postType']) {
        case 'Thought':
            if (!isset($_POST['thought']))
                return;
            $id = randomId(1) * -1;
            new Thought(Space::retrieveFromDB($_POST['space']), $id, unserialize($_SESSION['user']), 3, 2, urldecode($_POST['thought']));
            break;
        case 'Moment':
            break;
        case 'Essay':
            new Essay(Space::retrieveFromDB($_POST['space']), null, unserialize($_SESSION['user']), 3, 2, $_POST['title'], $_POST['markdown'], $_POST['excerpt']);
            break;
    }
}

function handleSignup()
{
    if (!isset($_POST['username']) || !isset($_POST['password']) || !isset($_POST['vPassword']))
        return;

    if ($_POST['password'] != $_POST['vPassword'])
        return;

    $_SESSION['user'] = serialize(new User(randomId(0) * -1, null, $_POST['username'], null, null, null, 3, password_hash($_POST['password'], PASSWORD_DEFAULT)));
    header('Location: .');
}

function handleUsernameCheck()
{
    if (!isset($_POST['username']))
        return;

    echo json_encode(['exists' => User::exists($_POST['username'])]);
}

function handleSignupHTML()
{
    if (isset($_SESSION['user']))
        header('Location: .');

    echo json_encode(['html' => User::getSignupHTML()]);
}

function handleLoginHTML()
{
    if (isset($_SESSION['user']))
        header('Location: .');

    echo json_encode(['html' => User::getLoginHTML()]);
}

function handleDeletePost()
{
    if (!isset($_POST['id'])) {
        echo json_encode(['error' => 'Missing required Post ID.']);
        return;
    }

    $stmt = 'DELETE FROM post WHERE id = ?';
    exec_stmt($stmt, 'i', $_POST['id']);
}

function handleNewSpaceHTML()
{
    $user = unserialize($_SESSION['user']);

    $html = '
        <div class="med_width std_border center padding modalContent">
            <h3>New Space</h3>
            <form method="post" action="director.php">
                <input type="hidden" name="formID" value="newSpace">
                <input type="hidden" name="redirect" value="" id="redirect">
                <input name="name" placeholder="Name" required autofocus>
                <input name="description" placeholder="Description" required>
                <select name="visibility">
                    <option value="1">Open</option>
                    <option value="2">Public</option>
                    <option value="3">Request</option>
                    <option value="4">Invite</option>
                    <option value="5">Private</option>
                </select>
        ';

    $spaces = $user->getAllSpaces();
    foreach ($spaces as $s) {
        $html .= '
            <label class="form_checkbox_container">' . $s->getName() . ' <i class="nf ' . getSpaceIcon($s) . ' left_margin"></i>
                <input type="radio" name="space" value="' . $s->getId() . '" id="space-' . $s->getId() . '">
                <span class="checkmark"></span>
            </label>
        ';
    }

    $html .= '
                <input class="button" type="submit" value="Create" id="create">
            </form>
        </div>
    ';

    echo json_encode(['html' => $html]);
}

function getSpaceIcon($space)
{
    switch ($space->getVisibility()) {
        case 1:
            return 'nf-cod-globe';
        case 2:
            return 'nf-fa-group';
        case 3:
        case 4:
            return 'nf-fa-user_group';
        case 5:
            return 'nf-fa-lock';
    }
}

function handleNewPostHTML()
{
    $user = unserialize($_SESSION['user']);

    // TODO: Need to plumb this into the DB via AJAX.
    // TODO: Need to store the current space in SESSION and use that to auto-select a Space
    // TODO: List the user's spaces or let them search for a space or quick select a favorited space
    $html = '
        <div class="med_width std_border center padding modalContent">
            <h3 id="newPostLabel">New Thought</h3>
            <form method="post" action="director.php">
                <input type="hidden" name="formID" value="newPost">
                <input type="hidden" name="redirect" value="" id="redirect">
                <input type="hidden" name="postType" value="Thought" id="postType">
                <input type="hidden" name="space" value="' . $_GET['id'] . '">

                <div id="newThought" class="column">
                    <input type="text" name="thought" placeholder="Jot a Thought." autofocus id="thought">
                </div>
                
                <div id="newMoment" class="column" style="display: none;">
                    <input type="text" name="caption" placeholder="Caption goes here." autofocus id="caption">
                </div>

                <div id="newEssay" class="column" style="display: none;">
                    <input type="text" name="title" placeholder="Title" autofocus id="title">
                    <textarea name="markdown" placeholder="#Heading" id="markdown"></textarea>
                    <input type="text" name="excerpt" placeholder="A 2-3 sentence summary." id="excerpt">
                </div>

                <div class="column" id="postSpaces">
        ';

    $spaces = $user->getAllSpaces();
    foreach ($spaces as $s) {
        $html .= '
            <label class="form_checkbox_container">' . $s->getName() . ' <i class="nf ' . getSpaceIcon($s) . ' left_margin"></i>
                <input type="radio" name="space" value="' . $s->getId() . '" id="space-' . $s->getId() . '">
                <span class="checkmark"></span>
            </label>
        ';
    }

    $html .= '
                </div>

                <input class="button" type="submit" value="Share" id="share">
            </form>
            <div class="line std_border"></div>
            <div id="newModalNav" class="row space_between">
                <span id="newNavThought" class="link">Thought</span>
                <span id="newNavMoment" class="link">Moment</span>
                <span id="newNavEssay" class="link">Essay</span>
            </div>
        </div>
    ';

    echo json_encode(['html' => $html]);
}

function handle_login()
{
    header('Content-Type: application/json');

    $response = [];

    if (isset($_POST['username']) && isset($_POST['password'])) {  // Corrected check
        // Ensure LoginCredentials and User classes are loaded
        // e.g., require_once 'path/to/LoginCredentials.php';
        //       require_once 'path/to/User.php';

        try {
            $creds = new LoginCredentials($_POST['username'], $_POST['password']);
            $user = User::login($creds);  // Assuming User::login() can return null or throw an exception

            if ($user != null) {
                $response['status'] = 'success';  // Use a clear status field
                $response['message'] = 'Login Successful.';  // Renamed 'log' to 'message' for clarity
                $response['redirect'] = 'spaces.php?view=list';

                // Serialize the user object and store it in the session
                $_SESSION['user'] = serialize($user);
                $spaces = $user->getSpaces();
                foreach ($spaces as $s)
                    $_SESSION['spaces'][] = serialize($s);
            } else {
                $response['status'] = 'error';
                $response['message'] = 'Incorrect username and/or password.';
            }
        } catch (Exception $e) {
            error_log('Login Error: ' . $e->getMessage() . ' in ' . $e->getFile() . ' on line ' . $e->getLine());

            $response['status'] = 'error';
            $response['message'] = 'An internal error occurred. Please try again later.';
        }
    } else {
        $response['status'] = 'error';
        $response['message'] = 'Invalid Request: Username and/or password not provided.';
    }

    echo json_encode($response);
    exit;
}