<?php

include '../conf/class.server.php';
include '../conf/koneksiPDO.php';
include '../conf/function.php';

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

$conn = new createCon();
$dbh = $conn->connect();

requireRobotSecret();

$jsonData = getRequestJson();
$act = isset($jsonData['act']) ? trim((string) $jsonData['act']) : '';

if ($act === '') {
    jsonResponse([
        'status' => false,
        'msg' => 'Parameter act tidak lengkap',
    ], 422);
}

function getManageJadwalTitle($jenis, $namaMahasiswa, $nimMahasiswa)
{
    $judulSeminar = '';
    switch ($jenis) {
        case 'Outline':
            $judulSeminar = 'Seminar Outline';
            break;
        case 'SidHas':
            $judulSeminar = 'Sidang Hasil';
            break;
        case 'Sidang':
            $judulSeminar = 'Sidang Terbuka';
            break;
    }

    if ($judulSeminar === '') {
        return '';
    }

    return $judulSeminar.' '.$namaMahasiswa.' / '.$nimMahasiswa;
}

function loadMahasiswaByNim($dbh, $nim)
{
    $sql = 'SELECT * FROM tbmhs WHERE nim = :nim';
    $stmt = $dbh->prepare($sql);
    $stmt->bindParam(':nim', $nim);
    $stmt->execute();

    $mahasiswa = $stmt->fetch(PDO::FETCH_ASSOC);
    if (!$mahasiswa) {
        jsonResponse([
            'status' => false,
            'msg' => 'NIM mahasiswa tidak dikenali',
        ], 404);
    }

    return $mahasiswa;
}

function loadDosenMeta($dbh, $namaPemb1, $namaPemb2, $namaPeng1, $namaPeng2)
{
    $namaList = [$namaPemb1, $namaPemb2, $namaPeng1, $namaPeng2];
    $placeholders = [];
    $params = [];

    foreach ($namaList as $index => $nama) {
        $key = ':nama'.$index;
        $placeholders[] = $key;
        $params[$key] = $nama;
    }

    $sql = 'SELECT * FROM tbdosen WHERE nmLengkap IN ('.implode(', ', $placeholders).')';
    $stmt = $dbh->prepare($sql);
    $stmt->execute($params);

    $result = [
        'listEmail' => [],
        'idPemb1' => 0,
        'idPemb2' => 0,
        'idPeng1' => 0,
        'idPeng2' => 0,
    ];

    while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
        if (!empty($row['email'])) {
            $result['listEmail'][] = $row['email'];
        }

        if ($namaPemb1 === $row['nmLengkap']) {
            $result['idPemb1'] = (int) $row['iddosen'];
        }

        if ($namaPemb2 === $row['nmLengkap']) {
            $result['idPemb2'] = (int) $row['iddosen'];
        }

        if ($namaPeng1 === $row['nmLengkap']) {
            $result['idPeng1'] = (int) $row['iddosen'];
        }

        if ($namaPeng2 === $row['nmLengkap']) {
            $result['idPeng2'] = (int) $row['iddosen'];
        }
    }

    return $result;
}

function callCalendarApi($endpoint, $payload)
{
    $url = 'http://203.24.50.140:8086/'.$endpoint;
    $postData = json_encode($payload);
    $opts = [
        'http' => [
            'method' => 'POST',
            'ignore_errors' => true,
            'header' => 'Content-Type: application/json',
            'content' => $postData,
            'timeout' => 20,
        ],
    ];

    $context = stream_context_create($opts);
    $response = @file_get_contents($url, false, $context);
    if ($response === false || trim($response) === '') {
        return [];
    }

    $decoded = json_decode($response, true);

    return is_array($decoded) ? $decoded : [];
}

function buildCalendarPayload($jenis, $namaMahasiswa, $nimMahasiswa, $ruangan, $waktuSidang, $listEmail, $calendarId = null)
{
    $timestampStartSeminar = strtotime($waktuSidang);
    if ($timestampStartSeminar === false) {
        jsonResponse([
            'status' => false,
            'msg' => 'Format waktuSidang tidak valid',
        ], 422);
    }

    $timestampEndSeminar = strtotime('+2 hours', $timestampStartSeminar);
    $payload = [
        'judul' => getManageJadwalTitle($jenis, $namaMahasiswa, $nimMahasiswa),
        'ruangan' => $ruangan,
        'start' => date('Y-m-d\TH:i:s', $timestampStartSeminar),
        'end' => date('Y-m-d\TH:i:s', $timestampEndSeminar),
        'emailUser' => array_values(array_unique(array_filter($listEmail))),
    ];

    if ($calendarId !== null && $calendarId !== '') {
        $payload['id'] = $calendarId;
    }

    return $payload;
}

function getManageJadwalParams($jsonData, $needsId)
{
    $required = [
        'nim',
        'judul',
        'ruangan',
        'jenis',
        'waktuSidang',
        'namaPemb1',
        'namaPemb2',
        'namaPeng1',
        'namaPeng2',
    ];

    if ($needsId) {
        $required[] = 'id';
    }

    foreach ($required as $field) {
        if (!isset($jsonData[$field]) || trim((string) $jsonData[$field]) === '') {
            jsonResponse([
                'status' => false,
                'msg' => 'Parameter tidak lengkap',
            ], 422);
        }
    }

    return [
        'id' => $needsId ? (int) $jsonData['id'] : 0,
        'nim' => trim((string) $jsonData['nim']),
        'judul' => trim((string) $jsonData['judul']),
        'ruangan' => trim((string) $jsonData['ruangan']),
        'jenis' => trim((string) $jsonData['jenis']),
        'waktuSidang' => trim((string) $jsonData['waktuSidang']),
        'namaPemb1' => trim((string) $jsonData['namaPemb1']),
        'namaPemb2' => trim((string) $jsonData['namaPemb2']),
        'namaPeng1' => trim((string) $jsonData['namaPeng1']),
        'namaPeng2' => trim((string) $jsonData['namaPeng2']),
    ];
}

switch ($act) {
    case 'add':
        $params = getManageJadwalParams($jsonData, false);
        $mahasiswa = loadMahasiswaByNim($dbh, $params['nim']);
        $dosenMeta = loadDosenMeta(
            $dbh,
            $params['namaPemb1'],
            $params['namaPemb2'],
            $params['namaPeng1'],
            $params['namaPeng2']
        );

        $listEmail = $dosenMeta['listEmail'];
        if (!empty($mahasiswa['email'])) {
            $listEmail[] = $mahasiswa['email'];
        }

        $calendarPayload = buildCalendarPayload(
            $params['jenis'],
            $mahasiswa['nmLengkap'],
            $mahasiswa['nim'],
            $params['ruangan'],
            $params['waktuSidang'],
            $listEmail
        );
        $calendarResponse = callCalendarApi('insertJadwal', $calendarPayload);
        $calendarId = isset($calendarResponse['id']) ? $calendarResponse['id'] : null;
        $calendarLink = isset($calendarResponse['link']) ? $calendarResponse['link'] : null;

        $sql = "INSERT INTO tbjadwal(idMhs, judul, ruangan, jenis, start, pemb1, pemb2, peng1, peng2, end, idProdi, calendarId, calendarLink, idPemb1, idPemb2, idPeng1, idPeng2) VALUES(:idMhs, :judul, :ruangan, :jenis, :waktuSidang, :namaPemb1, :namaPemb2, :namaPeng1, :namaPeng2, '2000-01-01 00:00:00', '2', :calendarId, :calendarLink, :idPemb1, :idPemb2, :idPeng1, :idPeng2)";
        $stmt = $dbh->prepare($sql);
        $stmt->bindValue(':idMhs', $mahasiswa['idmhs']);
        $stmt->bindValue(':judul', $params['judul']);
        $stmt->bindValue(':ruangan', $params['ruangan']);
        $stmt->bindValue(':jenis', $params['jenis']);
        $stmt->bindValue(':waktuSidang', $params['waktuSidang']);
        $stmt->bindValue(':namaPemb1', $params['namaPemb1']);
        $stmt->bindValue(':namaPemb2', $params['namaPemb2']);
        $stmt->bindValue(':namaPeng1', $params['namaPeng1']);
        $stmt->bindValue(':namaPeng2', $params['namaPeng2']);
        $stmt->bindValue(':calendarId', $calendarId);
        $stmt->bindValue(':calendarLink', $calendarLink);
        $stmt->bindValue(':idPemb1', $dosenMeta['idPemb1']);
        $stmt->bindValue(':idPemb2', $dosenMeta['idPemb2']);
        $stmt->bindValue(':idPeng1', $dosenMeta['idPeng1']);
        $stmt->bindValue(':idPeng2', $dosenMeta['idPeng2']);
        $stmt->execute();

        $error = $stmt->errorInfo();
        if ($error[0] !== '00000') {
            jsonResponse([
                'status' => false,
                'msg' => 'Terjadi kesalahan teknis!!!',
                'error' => $error,
            ], 500);
        }

        jsonResponse([
            'status' => true,
            'msg' => 'Berhasil menambah data jadwal!!!',
            'id' => $dbh->lastInsertId(),
            'link' => $calendarLink,
        ]);
        break;

    case 'update':
        $params = getManageJadwalParams($jsonData, true);
        $mahasiswa = loadMahasiswaByNim($dbh, $params['nim']);
        $dosenMeta = loadDosenMeta(
            $dbh,
            $params['namaPemb1'],
            $params['namaPemb2'],
            $params['namaPeng1'],
            $params['namaPeng2']
        );

        $listEmail = $dosenMeta['listEmail'];
        if (!empty($mahasiswa['email'])) {
            $listEmail[] = $mahasiswa['email'];
        }

        $sql = 'SELECT calendarId FROM tbjadwal WHERE id = :id';
        $stmt = $dbh->prepare($sql);
        $stmt->bindValue(':id', $params['id']);
        $stmt->execute();
        $jadwal = $stmt->fetch(PDO::FETCH_ASSOC);
        $calendarId = $jadwal ? $jadwal['calendarId'] : null;

        $sql = 'UPDATE tbjadwal SET idMhs = :idMhs, judul = :judul, ruangan = :ruangan, jenis = :jenis, start = :waktuSidang, pemb1 = :namaPemb1, pemb2 = :namaPemb2, peng1 = :namaPeng1, peng2 = :namaPeng2, idPemb1 = :idPemb1, idPemb2 = :idPemb2, idPeng1 = :idPeng1, idPeng2 = :idPeng2 WHERE id = :id';
        $stmt = $dbh->prepare($sql);
        $stmt->bindValue(':id', $params['id']);
        $stmt->bindValue(':idMhs', $mahasiswa['idmhs']);
        $stmt->bindValue(':judul', $params['judul']);
        $stmt->bindValue(':ruangan', $params['ruangan']);
        $stmt->bindValue(':jenis', $params['jenis']);
        $stmt->bindValue(':waktuSidang', $params['waktuSidang']);
        $stmt->bindValue(':namaPemb1', $params['namaPemb1']);
        $stmt->bindValue(':namaPemb2', $params['namaPemb2']);
        $stmt->bindValue(':namaPeng1', $params['namaPeng1']);
        $stmt->bindValue(':namaPeng2', $params['namaPeng2']);
        $stmt->bindValue(':idPemb1', $dosenMeta['idPemb1']);
        $stmt->bindValue(':idPemb2', $dosenMeta['idPemb2']);
        $stmt->bindValue(':idPeng1', $dosenMeta['idPeng1']);
        $stmt->bindValue(':idPeng2', $dosenMeta['idPeng2']);
        $stmt->execute();

        $error = $stmt->errorInfo();
        if ($error[0] !== '00000') {
            jsonResponse([
                'status' => false,
                'msg' => 'Terjadi kesalahan teknis!!!',
                'error' => $error,
            ], 500);
        }

        if (!empty($calendarId)) {
            $calendarPayload = buildCalendarPayload(
                $params['jenis'],
                $mahasiswa['nmLengkap'],
                $mahasiswa['nim'],
                $params['ruangan'],
                $params['waktuSidang'],
                $listEmail,
                $calendarId
            );
            callCalendarApi('updateJadwal', $calendarPayload);
        }

        jsonResponse([
            'status' => true,
            'msg' => 'Berhasil mengubah data jadwal!!!',
        ]);
        break;

    case 'delete':
        if (!isset($jsonData['id'], $jsonData['nim']) || trim((string) $jsonData['id']) === '' || trim((string) $jsonData['nim']) === '') {
            jsonResponse([
                'status' => false,
                'msg' => 'Parameter tidak lengkap',
            ], 422);
        }

        $id = (int) $jsonData['id'];
        $nim = trim((string) $jsonData['nim']);
        $mahasiswa = loadMahasiswaByNim($dbh, $nim);

        $sql = 'SELECT calendarId FROM tbjadwal WHERE id = :id';
        $stmt = $dbh->prepare($sql);
        $stmt->bindValue(':id', $id);
        $stmt->execute();
        $jadwal = $stmt->fetch(PDO::FETCH_ASSOC);
        $calendarId = $jadwal ? $jadwal['calendarId'] : null;

        $sql = 'DELETE FROM tbjadwal WHERE id = :id AND idMhs = :idMhs';
        $stmt = $dbh->prepare($sql);
        $stmt->bindValue(':id', $id);
        $stmt->bindValue(':idMhs', $mahasiswa['idmhs']);
        $stmt->execute();

        $error = $stmt->errorInfo();
        if ($error[0] !== '00000') {
            jsonResponse([
                'status' => false,
                'msg' => 'Terjadi kesalahan teknis!!!',
                'error' => $error,
            ], 500);
        }

        if (!empty($calendarId)) {
            callCalendarApi('deleteJadwal', [
                'id' => $calendarId,
            ]);
        }

        jsonResponse([
            'status' => true,
            'msg' => 'Berhasil menghapus data jadwal!!!',
        ]);
        break;

    default:
        jsonResponse([
            'status' => false,
            'msg' => 'act tidak dikenali',
        ], 422);
}