<?php
require_once 'auth.php';

// Check if user is logged in
if (!is_logged_in()) {
    header('Location: login.php');
    exit;
}

require_once __DIR__ . '/db/config.php';

// Handle delete task
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['delete_task']) && hasPermission('manage_tasks')) {
    $task_id = $_POST['delete_task_id'] ?? null;

    if (!empty($task_id)) {
        try {
            $pdo = db();
            $stmt = $pdo->prepare("DELETE FROM tasks WHERE id = ?");
            $stmt->execute([$task_id]);
            header("Location: " . $_SERVER['PHP_SELF']);
            exit;
        } catch (PDOException $e) {
            error_log("Error deleting task: " . $e->getMessage());
        }
    }
}

// Handle delete candidate
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['delete_candidate']) && hasPermission('manage_candidates')) {
    $candidate_id = $_POST['delete_candidate_id'] ?? null;

    if (!empty($candidate_id)) {
        try {
            $pdo = db();
            $stmt = $pdo->prepare("DELETE FROM candidates WHERE id = ?");
            $stmt->execute([$candidate_id]);
            header("Location: " . $_SERVER['PHP_SELF']);
            exit;
        } catch (PDOException $e) {
            error_log("Error deleting candidate: " . $e->getMessage());
        }
    }
}

// Handle form submission for new candidate
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['add_candidate']) && hasPermission('manage_candidates')) {
    $name = $_POST['name'] ?? '';
    $email = $_POST['email'] ?? '';
    $phone = $_POST['phone'] ?? '';
    $status = $_POST['status'] ?? 'Applied';
    $notes = $_POST['notes'] ?? '';

    if (!empty($name) && !empty($email)) {
        try {
            $pdo = db();
            $stmt = $pdo->prepare("INSERT INTO candidates (name, email, phone, status, notes) VALUES (?, ?, ?, ?, ?)");
            $stmt->execute([$name, $email, $phone, $status, $notes]);
            require_once 'workflow_engine.php';
            trigger_workflow('candidate_created', ['candidate.id' => $pdo->lastInsertId(), 'candidate.name' => $name, 'candidate.email' => $email]);
            // Redirect to avoid form resubmission
            header("Location: " . $_SERVER['PHP_SELF']);
            exit;
        } catch (PDOException $e) {
            // Handle error, e.g., show an error message
            error_log("Error adding candidate: " . $e->getMessage());
        }
    }
}

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['complete_task']) && hasPermission('manage_tasks')) {
    $task_id = $_POST['task_id'] ?? null;

    if (!empty($task_id)) {
        try {
            $pdo = db();
            $stmt = $pdo->prepare("UPDATE tasks SET status = 'Done' WHERE id = ?");
            $stmt->execute([$task_id]);

            // Fetch task details to pass to the workflow
            $stmt = $pdo->prepare("SELECT * FROM tasks WHERE id = ?");
            $stmt->execute([$task_id]);
            $task = $stmt->fetch();

            require_once 'workflow_engine.php';
            trigger_workflow('task_completed', ['task.id' => $task['id'], 'task.name' => $task['task_name'], 'task.status' => $task['status']]);

            header("Location: " . $_SERVER['PHP_SELF']);
            exit;
        } catch (PDOException $e) {
            error_log("Error completing task: " . $e->getMessage());
        }
    }
}

// Handle form submission for new task
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['add_task']) && hasPermission('manage_tasks')) {
    $task_name = $_POST['task_name'] ?? '';
    $candidate_id = $_POST['candidate_id'] ?? null;
    $due_date = $_POST['due_date'] ?? null;
    $status = $_POST['status'] ?? 'To Do';
    $description = $_POST['description'] ?? '';

    if (!empty($task_name) && !empty($candidate_id)) {
        try {
            $pdo = db();
            $stmt = $pdo->prepare("INSERT INTO tasks (task_name, candidate_id, due_date, status, description) VALUES (?, ?, ?, ?, ?)");
            $stmt->execute([$task_name, $candidate_id, $due_date, $status, $description]);
            header("Location: " . $_SERVER['PHP_SELF']);
            exit;
        } catch (PDOException $e) {
            error_log("Error adding task: " . $e->getMessage());
        }
    }
}

// Fetch tasks from the database
try {
    $pdo = db();
    $stmt = $pdo->query("SELECT tasks.*, candidates.name as candidate_name FROM tasks JOIN candidates ON tasks.candidate_id = candidates.id ORDER BY created_at DESC");
    $tasks = $stmt->fetchAll();
} catch (PDOException $e) {
    error_log("Error fetching tasks: " . $e->getMessage());
    $tasks = []; // Ensure $tasks is an array
}

// Fetch candidates from the database
try {
    $pdo = db();
    $stmt = $pdo->query("SELECT * FROM candidates ORDER BY created_at DESC");
    $candidates = $stmt->fetchAll();
} catch (PDOException $e) {
    // Handle error, e.g., show an error message
    error_log("Error fetching candidates: " . $e->getMessage());
    $candidates = []; // Ensure $candidates is an array
}

function getStatusClass($status) {
    switch ($status) {
        case 'Applied': return 'status-new';
        case 'Interviewing': return 'status-interview';
        case 'Hired': return 'status-hired';
        case 'Rejected': return 'status-rejected';
        case 'Offered': return 'status-offered';
        case 'To Do': return 'status-todo';
        case 'In Progress': return 'status-in-progress';
        case 'Done': return 'status-done';
        default: return '';
    }
}
?>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    
    <!-- SEO & Meta Tags -->
    <title>FinMox Flow</title>
    <meta name="description" content="FinMox Flow - a multi-tenant SaaS platform for HR and Operations teams. Built with Flatlogic Generator.">
    <meta name="keywords" content="finmox, hr, operations, saas, candidate tracking, onboarding, automations, ai copilot, flatlogic">
    
    <!-- Social Media Meta Tags -->
    <meta property="og:title" content="FinMox Flow">
    <meta property="og:description" content="A multi-tenant SaaS platform for HR and Operations teams.">
    <meta property="og:image" content="<?php echo htmlspecialchars($_SERVER['PROJECT_IMAGE_URL'] ?? '', ENT_QUOTES, 'UTF-8'); ?>">
    <meta name="twitter:card" content="summary_large_image">
    <meta name="twitter:image" content="<?php echo htmlspecialchars($_SERVER['PROJECT_IMAGE_URL'] ?? '', ENT_QUOTES, 'UTF-8'); ?>">

    <!-- Stylesheets -->
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link rel="stylesheet" href="assets/css/custom.css?v=<?php echo time(); ?>">

</head>
<body>

    <header class="header d-flex justify-content-between align-items-center">
        <div class="logo">FinMox<span class="dot">.</span></div>
        <nav class="d-flex align-items-center">
            <a href="index.php" class="btn btn-outline-primary me-2">Home</a>
            <a href="chat.php" class="btn btn-outline-primary me-2">Chat</a>
            <a href="dashboard.php" class="btn btn-outline-primary me-2">Dashboard</a>
            <a href="workflows.php" class="btn btn-outline-primary me-3">Workflows</a>
            <div class="dropdown">
                <button class="btn btn-outline-secondary dropdown-toggle" type="button" id="userDropdown" data-bs-toggle="dropdown" aria-expanded="false">
                    <?php echo htmlspecialchars($_SESSION['username']); ?>
                </button>
                <ul class="dropdown-menu dropdown-menu-end" aria-labelledby="userDropdown">
                    <?php if (hasPermission('manage_roles')): ?>
                        <li><a class="dropdown-item" href="roles.php">Manage Roles</a></li>
                        <li><hr class="dropdown-divider"></li>
                    <?php endif; ?>
                    <li><a class="dropdown-item" href="logout.php">Logout</a></li>
                </ul>
            </div>
        </nav>
    </header>

    <main class="main-content">
        <div class="container-fluid">
            <?php if (hasPermission('view_candidates')): ?>
            <div class="page-header">
                <h1 class="page-title">Candidates</h1>
                <?php if (hasPermission('manage_candidates')): ?>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addCandidateModal">
                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-plus-lg me-1" viewBox="0 0 16 16">
                      <path fill-rule="evenodd" d="M8 2a.5.5 0 0 1 .5.5v5h5a.5.5 0 0 1 0 1h-5v5a.5.5 0 0 1-1 0v-5h-5a.5.5 0 0 1 0-1h5v-5A.5.5 0 0 1 8 2Z"/>
                    </svg>
                    Add Candidate
                </button>
                <?php endif; ?>
            </div>

            <div class="card">
                <div class="card-body p-0">
                    <div class="table-responsive">
                        <table class="table mb-0">
                            <thead>
                                <tr>
                                    <th class="ps-4">Name</th>
                                    <th>Phone</th>
                                    <th>Status</th>
                                    <th class="text-end pe-4">Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($candidates as $candidate): ?>
                                <tr>
                                    <td class="ps-4">
                                        <div class="d-flex align-items-center">
                                            <div>
                                                <div class="candidate-name"><?php echo htmlspecialchars($candidate['name']); ?></div>
                                                <div class="candidate-email"><?php echo htmlspecialchars($candidate['email']); ?></div>
                                            </div>
                                        </div>
                                    </td>
                                    <td><?php echo htmlspecialchars($candidate['phone'] ?? 'N/A'); ?></td>
                                    <td>
                                        <span class="status-badge <?php echo getStatusClass($candidate['status']); ?>">
                                            <?php echo htmlspecialchars($candidate['status']); ?>
                                        </span>
                                    </td>
                                    <td class="text-end pe-4">
                                        <a href="edit_candidate.php?id=<?php echo $candidate['id']; ?>" class="btn btn-sm btn-outline-primary">Edit</a>
                                        <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" style="display: inline;">
                                            <input type="hidden" name="delete_candidate_id" value="<?php echo $candidate['id']; ?>">
                                            <button type="submit" name="delete_candidate" class="btn btn-sm btn-outline-danger" onclick="return confirm('Are you sure you want to delete this candidate?');">Delete</button>
                                        </form>
                                    </td>
                                </tr>
                                <?php endforeach; ?>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
            <?php endif; ?>

            <?php if (hasPermission('view_tasks')): ?>
            <div class="page-header mt-5">
                <h1 class="page-title">Tasks</h1>
                <?php if (hasPermission('manage_tasks')): ?>
                <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addTaskModal">
                    <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="currentColor" class="bi bi-plus-lg me-1" viewBox="0 0 16 16">
                      <path fill-rule="evenodd" d="M8 2a.5.5 0 0 1 .5.5v5h5a.5.5 0 0 1 0 1h-5v5a.5.5 0 0 1-1 0v-5h-5a.5.5 0 0 1 0-1h5v-5A.5.5 0 0 1 8 2Z"/>
                    </svg>
                    Add Task
                </button>
                <?php endif; ?>
            </div>

            <div class="card">
                <div class="card-body p-0">
                    <div class="table-responsive">
                        <table class="table mb-0">
                            <thead>
                                <tr>
                                    <th class="ps-4">Task Name</th>
                                    <th>Assigned To</th>
                                    <th>Due Date</th>
                                    <th>Status</th>
                                    <th class="text-end pe-4">Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($tasks as $task): ?>
                                <tr>
                                    <td class="ps-4"><?php echo htmlspecialchars($task['task_name']); ?></td>
                                    <td><?php echo htmlspecialchars($task['candidate_name'] ?? 'N/A'); ?></td>
                                    <td><?php echo htmlspecialchars($task['due_date'] ?? 'N/A'); ?></td>
                                    <td>
                                        <span class="status-badge <?php echo getStatusClass($task['status']); ?>">
                                            <?php echo htmlspecialchars($task['status']); ?>
                                        </span>
                                    </td>
                                    <td class="text-end pe-4">
                                        <a href="edit_task.php?id=<?php echo $task['id']; ?>" class="btn btn-sm btn-outline-primary">Edit</a>
                                        <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" style="display: inline;">
                                            <input type="hidden" name="delete_task_id" value="<?php echo $task['id']; ?>">
                                            <button type="submit" name="delete_task" class="btn btn-sm btn-outline-danger" onclick="return confirm('Are you sure you want to delete this task?');">Delete</button>
                                        </form>
                                        <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>" style="display: inline;">
                                            <input type="hidden" name="task_id" value="<?php echo $task['id']; ?>">
                                            <button type="submit" name="complete_task" class="btn btn-sm btn-success">Complete</button>
                                        </form>
                                    </td>
                                </tr>
                                <?php endforeach; ?>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
            <?php endif; ?>
        </div>
    </main>

    <!-- Add Candidate Modal -->
<div class="modal fade" id="addCandidateModal" tabindex="-1" aria-labelledby="addCandidateModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="addCandidateModalLabel">Add New Candidate</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
                    <input type="hidden" name="add_candidate" value="1">
                    <div class="mb-3">
                        <label for="name" class="form-label">Name</label>
                        <input type="text" class="form-control" id="name" name="name" required>
                    </div>
                    <div class="mb-3">
                        <label for="email" class="form-label">Email</label>
                        <input type="email" class="form-control" id="email" name="email" required>
                    </div>
                    <div class="mb-3">
                        <label for="phone" class="form-label">Phone</label>
                        <input type="text" class="form-control" id="phone" name="phone">
                    </div>
                    <div class="mb-3">
                        <label for="status" class="form-label">Status</label>
                        <select class="form-select" id="status" name="status">
                            <option value="Applied" selected>Applied</option>
                            <option value="Interviewing">Interviewing</option>
                            <option value="Offered">Offered</option>
                            <option value="Hired">Hired</option>
                            <option value="Rejected">Rejected</option>
                        </select>
                    </div>
                    <div class="mb-3">
                        <label for="notes" class="form-label">Notes</label>
                        <textarea class="form-control" id="notes" name="notes" rows="3"></textarea>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
                        <button type="submit" class="btn btn-primary">Save Candidate</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>

    <!-- Add Task Modal -->
<div class="modal fade" id="addTaskModal" tabindex="-1" aria-labelledby="addTaskModalLabel" aria-hidden="true">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="addTaskModalLabel">Add New Task</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <div class="modal-body">
                <form method="POST" action="<?php echo $_SERVER['PHP_SELF']; ?>">
                    <input type="hidden" name="add_task" value="1">
                    <div class="mb-3">
                        <label for="task_name" class="form-label">Task Name</label>
                        <input type="text" class="form-control" id="task_name" name="task_name" required>
                    </div>
                    <div class="mb-3">
                        <label for="candidate_id" class="form-label">Assign to Candidate</label>
                        <select class="form-select" id="candidate_id" name="candidate_id" required>
                            <option value="" disabled selected>Select a candidate</option>
                            <?php foreach ($candidates as $candidate): ?>
                                <option value="<?php echo $candidate['id']; ?>"><?php echo htmlspecialchars($candidate['name']); ?></option>
                            <?php endforeach; ?>
                        </select>
                    </div>
                    <div class="mb-3">
                        <label for="due_date" class="form-label">Due Date</label>
                        <input type="date" class="form-control" id="due_date" name="due_date">
                    </div>
                    <div class="mb-3">
                        <label for="task_status" class="form-label">Status</label>
                        <select class="form-select" id="task_status" name="status">
                            <option value="To Do" selected>To Do</option>
                            <option value="In Progress">In Progress</option>
                            <option value="Done">Done</option>
                        </select>
                    </div>
                    <div class="mb-3">
                        <label for="task_description" class="form-label">Description</label>
                        <textarea class="form-control" id="task_description" name="description" rows="3"></textarea>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
                        <button type="submit" class="btn btn-primary">Save Task</button>
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>

    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
    <script src="assets/js/main.js?v=<?php echo time(); ?>"></script>

    <!-- AI Chat Interface -->
    <div id="chat-container" class="chat-container">
        <div id="chat-header" class="chat-header">
            <span>AI Assistant</span>
            <button id="close-chat" class="btn-close btn-sm" aria-label="Close"></button>
        </div>
        <div id="chat-body" class="chat-body">
            <!-- Chat messages will be appended here -->
        </div>
        <div id="chat-input-container" class="chat-input-container">
            <input type="text" id="chat-input" class="form-control" placeholder="Ask a question...">
            <button id="send-chat" class="btn btn-primary">Send</button>
        </div>
    </div>

    <button id="chat-toggle" class="chat-toggle-button">
        <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="currentColor" class="bi bi-chat-dots" viewBox="0 0 16 16">
            <path d="M5 8a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm4 0a1 1 0 1 1-2 0 1 1 0 0 1 2 0zm3 1a1 1 0 1 0 0-2 1 1 0 0 0 0 2z"/>
            <path d="M2.165 15.803l-1.57-1.57a1 1 0 0 1 0-1.414L2.165 10.5l1.57 1.57-1.57 1.57zm1.57-1.57l-1.57-1.57a1 1 0 0 1 0-1.414l1.57-1.57 1.57 1.57-1.57 1.57zM12.235 2.165l1.57 1.57a1 1 0 0 1 0 1.414l-1.57 1.57-1.57-1.57 1.57-1.57z"/>
            <path d="M15.657 2.343a1 1 0 0 1 0 1.414l-1.57 1.57-1.57-1.57 1.57-1.57a1 1 0 0 1 1.414 0z"/>
            <path d="M.5 1a1 1 0 0 1 1-1h12a1 1 0 0 1 1 1v7a1 1 0 0 1-1 1H2.707l-2.147 2.146a.5.5 0 0 0 .708.708L3.293 11H15a2 2 0 0 0 2-2V1a2 2 0 0 0-2-2H1.5A1.5 1.5 0 0 0 0 1.5v12.793a.5.5 0 0 0 .854.353L.5 1z"/>
        </svg>
    </button>
</body>
</html>