<?php
// api/agency_actions.php - Handle CRUD for agencies
header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');

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

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    echo json_encode(['status' => 'error', 'message' => 'Invalid request method']);
    exit;
}

$input = json_decode(file_get_contents('php://input'), true);
if (!$input) {
    $input = $_POST;
}

$action = $input['action'] ?? '';

if (empty($action)) {
    echo json_encode(['status' => 'error', 'message' => 'Missing action']);
    exit;
}

try {
    $dbInfo = getDbConnection();
    $pdo = $dbInfo['pdo'];

    if ($action === 'add_agency') {
        $id = strtoupper(trim($input['id'] ?? ''));
        $name = trim($input['name'] ?? '');
        $code = strtoupper(trim($input['code'] ?? ''));
        $password = trim($input['password'] ?? '1234');
        $gdriveFolderId = trim($input['gdriveFolderId'] ?? '');

        if(empty($id) || empty($name) || empty($code)) {
            echo json_encode(['status' => 'error', 'message' => 'Missing required fields']);
            exit;
        }

        // Check if ID exists
        $checkStmt = $pdo->prepare("SELECT id FROM agencies WHERE id = ?");
        $checkStmt->execute([$id]);
        if ($checkStmt->fetch()) {
            echo json_encode(['status' => 'error', 'message' => 'รหัสหน่วยงานนี้มีอยู่ในระบบแล้ว']);
            exit;
        }

        $stmt = $pdo->prepare("INSERT INTO agencies (id, name, code, admin_password, gdrive_folder_id) VALUES (?, ?, ?, ?, ?)");
        $stmt->execute([$id, $name, $code, $password, $gdriveFolderId ?: null]);

        $actionUserId = $input['action_user_id'] ?? 'SUPER_ADMIN';
        $actionUserName = $input['action_user_name'] ?? 'ผู้ดูแลระบบ';
        logActivity($pdo, $actionUserId, $actionUserName, 'ADD_AGENCY', ['agency_id' => $id, 'name' => $name, 'code' => $code]);

        echo json_encode(['status' => 'success', 'message' => 'เพิ่มหน่วยงานเรียบร้อยแล้ว']);
    } 
    elseif ($action === 'edit_agency') {
        $id = strtoupper(trim($input['id'] ?? ''));
        $name = trim($input['name'] ?? '');
        $code = strtoupper(trim($input['code'] ?? ''));
        $password = trim($input['password'] ?? '');
        $gdriveFolderId = trim($input['gdriveFolderId'] ?? '');

        if(empty($id) || empty($name) || empty($code)) {
            echo json_encode(['status' => 'error', 'message' => 'Missing required fields']);
            exit;
        }
        
        if (empty($password)) {
            $stmt = $pdo->prepare("UPDATE agencies SET name = ?, code = ?, gdrive_folder_id = ? WHERE id = ?");
            $stmt->execute([$name, $code, $gdriveFolderId ?: null, $id]);
        } else {
            $stmt = $pdo->prepare("UPDATE agencies SET name = ?, code = ?, admin_password = ?, gdrive_folder_id = ? WHERE id = ?");
            $stmt->execute([$name, $code, $password, $gdriveFolderId ?: null, $id]);
        }

        $actionUserId = $input['action_user_id'] ?? 'SUPER_ADMIN';
        $actionUserName = $input['action_user_name'] ?? 'ผู้ดูแลระบบ';
        logActivity($pdo, $actionUserId, $actionUserName, 'EDIT_AGENCY', ['agency_id' => $id, 'name' => $name, 'code' => $code]);

        echo json_encode(['status' => 'success', 'message' => 'แก้ไขข้อมูลหน่วยงานเรียบร้อยแล้ว']);
    } 
    elseif ($action === 'delete_agency') {
        $id = strtoupper(trim($input['id'] ?? ''));
        if(empty($id)) {
            echo json_encode(['status' => 'error', 'message' => 'Missing agency ID']);
            exit;
        }
        
        $stmt = $pdo->prepare("DELETE FROM agencies WHERE id = ?");
        $stmt->execute([$id]);

        $actionUserId = $input['action_user_id'] ?? 'SUPER_ADMIN';
        $actionUserName = $input['action_user_name'] ?? 'ผู้ดูแลระบบ';
        logActivity($pdo, $actionUserId, $actionUserName, 'DELETE_AGENCY', ['agency_id' => $id]);

        echo json_encode(['status' => 'success', 'message' => 'ลบหน่วยงานเรียบร้อยแล้ว']);
    } 
    elseif ($action === 'reset_password') {
        $id = strtoupper(trim($input['id'] ?? ''));
        if(empty($id)) {
            echo json_encode(['status' => 'error', 'message' => 'Missing agency ID']);
            exit;
        }
        $stmt = $pdo->prepare("UPDATE agencies SET admin_password = '1234' WHERE id = ?");
        $stmt->execute([$id]);
        echo json_encode(['status' => 'success', 'message' => 'รีเซ็ตรหัสผ่านเป็น 1234 เรียบร้อยแล้ว']);
    }
    else {
        echo json_encode(['status' => 'error', 'message' => 'Invalid action']);
    }
} catch (\Exception $e) {
    echo json_encode(['status' => 'error', 'message' => 'Database Error: ' . $e->getMessage()]);
}
?>