<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Http;

class PembiayaanOnlineController extends Controller
{
    public function __construct()
    {
        $this->middleware('auth');
    }

    protected function api()
    {
        return Http::withOptions(['verify' => config('app.api_verify')]);
    }

    protected function kodcaw()
    {
        return Auth::user()->cawangan;
    }

    /**
     * PC senarai queue + batch history.
     */
    public function index(Request $request)
    {
        $auth_user = Auth::user();
        $kodcaw = $this->kodcaw();
        $api_url = config('api.url');

        $cawangan_info = $this->api()
            ->get($api_url . '/api/cawangan/' . $kodcaw)
            ->json();

        $queue = $this->api()
            ->get($api_url . '/api/pembiayaan-online/' . $kodcaw . '/queue')
            ->json();

        $batches = $this->api()
            ->get($api_url . '/api/pembiayaan-online/' . $kodcaw . '/batches')
            ->json();

        $banks = $this->api()->get($api_url . '/api/bank')->json();
        if (!is_array($banks)) {
            $banks = [];
        }

        $modal = $this->api()
            ->get($api_url . '/api/modal-online/' . $kodcaw)
            ->json();

        $lines = $queue['data'] ?? [];
        $slot = $queue['slot_cadangan'] ?? null;
        if (!is_array($batches)) {
            $batches = [];
        }

        return view('pembiayaan_online.pc.senarai', compact(
            'auth_user',
            'kodcaw',
            'api_url',
            'cawangan_info',
            'lines',
            'batches',
            'banks',
            'modal',
            'slot',
            'queue'
        ));
    }

    /**
     * Update bank/docs for a queue line.
     */
    public function updateLine(Request $request, $id)
    {
        $kodcaw = $this->kodcaw();
        $api_url = config('api.url');

        $payload = [
            'kodbank' => $request->input('kodbank'),
            'noakaun' => $request->input('noakaun'),
            'nama_bank' => $request->input('nama_bank'),
            'nama_akaun' => $request->input('nama_akaun'),
            'nota' => $request->input('nota'),
            'update_customer_bank' => true,
        ];

        $res = $this->api()
            ->asForm()
            ->put($api_url . '/api/pembiayaan-online/' . $kodcaw . '/lines/' . $id, $payload);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal kemaskini rekod.';
            return redirect()->back()->with('error', $msg);
        }

        return redirect()->route('pembiayaan.online.pc')->with('message', 'Rekod dikemaskini.');
    }

    /**
     * Submit selected lines as a batch to Operasi.
     */
    public function submitBatch(Request $request)
    {
        $kodcaw = $this->kodcaw();
        $api_url = config('api.url');
        $auth_user = Auth::user();

        $ids = $request->input('ids', []);
        if (!is_array($ids)) {
            $ids = array_filter(explode(',', (string) $ids));
        }

        $res = $this->api()
            ->asForm()
            ->post($api_url . '/api/pembiayaan-online/' . $kodcaw . '/batches/submit', [
                'ids' => $ids,
                'pc_submitted_by' => $auth_user['name'],
                'slot' => $request->input('slot'),
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal hantar batch.';
            return redirect()->back()->with('error', $msg);
        }

        $batchNo = $res->json()['batch']['batch_no'] ?? '';
        return redirect()->route('pembiayaan.online.pc')
            ->with('message', 'Batch dihantar ke Operasi' . ($batchNo ? ': ' . $batchNo : '.'));
    }

    /**
     * Batch detail.
     */
    public function showBatch($batchId)
    {
        $kodcaw = $this->kodcaw();
        $api_url = config('api.url');

        $cawangan_info = $this->api()
            ->get($api_url . '/api/cawangan/' . $kodcaw)
            ->json();

        $detail = $this->api()
            ->get($api_url . '/api/pembiayaan-online/' . $kodcaw . '/batches/' . $batchId)
            ->json();

        if (!is_array($detail) || empty($detail['batch'])) {
            return redirect()->route('pembiayaan.online.pc')->with('error', 'Batch tidak dijumpai.');
        }

        return view('pembiayaan_online.pc.batch', [
            'batch' => $detail['batch'],
            'lines' => $detail['lines'] ?? [],
            'kodcaw' => $kodcaw,
            'api_url' => $api_url,
            'cawangan_info' => $cawangan_info,
        ]);
    }

    /**
     * PC: senarai PAID untuk tally + blast.
     */
    public function paidIndex(Request $request)
    {
        $auth_user = Auth::user();
        $kodcaw = $this->kodcaw();
        $api_url = config('api.url');
        $blastFilter = $request->input('blast_sent', '0');

        $cawangan_info = $this->api()
            ->get($api_url . '/api/cawangan/' . $kodcaw)
            ->json();

        $query = [];
        if ($blastFilter !== 'all' && $blastFilter !== '') {
            $query['blast_sent'] = $blastFilter;
        }

        $paid = $this->api()
            ->get($api_url . '/api/pembiayaan-online/' . $kodcaw . '/paid', $query)
            ->json();

        $lines = $paid['data'] ?? [];
        if (!is_array($lines)) {
            $lines = [];
        }

        $bilangan = $paid['bilangan'] ?? count($lines);
        $jumlah = $paid['jumlah'] ?? 0;

        return view('pembiayaan_online.pc.paid', compact(
            'auth_user',
            'kodcaw',
            'api_url',
            'cawangan_info',
            'lines',
            'bilangan',
            'jumlah',
            'blastFilter'
        ));
    }

    /**
     * PC: view/download bukti bayaran inline.
     */
    public function viewBukti($id)
    {
        $kodcaw = $this->kodcaw();
        $res = $this->api()
            ->get(config('api.url') . '/api/pembiayaan-online/' . $kodcaw . '/lines/' . $id . '/bukti');

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Bukti tidak dijumpai.';
            return redirect()->back()->with('error', $msg);
        }

        $payload = $res->json();
        $bukti = $payload['bukti'] ?? null;
        if (!$bukti || empty($bukti['data'])) {
            return redirect()->back()->with('error', 'Fail bukti kosong.');
        }

        $raw = $bukti['data'];
        if (strpos($raw, 'base64,') !== false) {
            $raw = substr($raw, strpos($raw, 'base64,') + 7);
        }
        $binary = base64_decode($raw, true);
        if ($binary === false) {
            $binary = base64_decode($bukti['data']);
        }

        $type = $bukti['type'] ?? 'application/octet-stream';
        $filename = $bukti['filename'] ?? ('bukti-' . $id);

        return response($binary, 200, [
            'Content-Type' => $type,
            'Content-Disposition' => 'inline; filename="' . $filename . '"',
        ]);
    }

    /**
     * PC: tanda rekod PAID sebagai selesai semak / blast.
     */
    public function markBlast(Request $request)
    {
        $kodcaw = $this->kodcaw();
        $ids = $request->input('ids', []);
        if (!is_array($ids)) {
            $ids = array_filter(explode(',', (string) $ids));
        }

        if (count($ids) === 0) {
            return redirect()->back()->with('error', 'Sila pilih sekurang-kurangnya satu rekod.');
        }

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/pembiayaan-online/' . $kodcaw . '/paid/blast', [
                'ids' => $ids,
                'blast_by' => Auth::user()['name'],
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal tanda selesai.';
            return redirect()->back()->with('error', $msg);
        }

        $n = $res->json()['dikemaskini'] ?? count($ids);
        return redirect()
            ->route('pembiayaan.online.pc.paid')
            ->with('message', $n . ' rekod ditanda selesai semak/blast.');
    }

    /**
     * Operasi: senarai batch semua cawangan.
     */
    public function operasiIndex(Request $request)
    {
        $auth_user = Auth::user();
        $api_url = config('api.url');
        $status = $request->input('status', 'SUBMITTED');
        $tarikh = $request->input('tarikh');

        $query = ['status' => $status];
        if ($tarikh) {
            $query['tarikh'] = $tarikh;
        }

        $res = $this->api()
            ->get($api_url . '/api/pembiayaan-online/operasi/batches', $query)
            ->json();

        $batches = $res['data'] ?? [];
        if (!is_array($batches)) {
            $batches = [];
        }

        return view('pembiayaan_online.operasi.senarai', compact(
            'auth_user',
            'api_url',
            'batches',
            'status',
            'tarikh'
        ));
    }

    /**
     * Operasi: detail batch + lines.
     */
    public function operasiShowBatch($kodcaw, $batchId)
    {
        $auth_user = Auth::user();
        $api_url = config('api.url');

        $cawangan_info = $this->api()
            ->get($api_url . '/api/cawangan/' . $kodcaw)
            ->json();

        $detail = $this->api()
            ->get($api_url . '/api/pembiayaan-online/operasi/' . $kodcaw . '/batches/' . $batchId)
            ->json();

        if (!is_array($detail) || empty($detail['batch'])) {
            return redirect()
                ->route('pembiayaan.online.operasi')
                ->with('error', 'Batch tidak dijumpai.');
        }

        return view('pembiayaan_online.operasi.batch', [
            'auth_user' => $auth_user,
            'batch' => $detail['batch'],
            'lines' => $detail['lines'] ?? [],
            'kodcaw' => $kodcaw,
            'api_url' => $api_url,
            'cawangan_info' => $cawangan_info,
        ]);
    }

    public function operasiApproveLine(Request $request, $kodcaw, $id)
    {
        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/pembiayaan-online/operasi/' . $kodcaw . '/lines/' . $id . '/approve', [
                'ops_by' => Auth::user()['name'],
            ]);

        return $this->opsRedirect($res, $kodcaw, $request->input('batch_id'), 'Rekod diluluskan.');
    }

    public function operasiRejectLine(Request $request, $kodcaw, $id)
    {
        $reason = trim((string) $request->input('reject_reason', ''));
        if ($reason === '') {
            return redirect()->back()->with('error', 'Sebab tolak diperlukan.');
        }

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/pembiayaan-online/operasi/' . $kodcaw . '/lines/' . $id . '/reject', [
                'ops_by' => Auth::user()['name'],
                'reject_reason' => $reason,
            ]);

        return $this->opsRedirect($res, $kodcaw, $request->input('batch_id'), 'Rekod ditolak. Dikembalikan ke PC.');
    }

    public function operasiApproveBatch(Request $request, $kodcaw, $batchId)
    {
        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/pembiayaan-online/operasi/' . $kodcaw . '/batches/' . $batchId . '/approve', [
                'ops_by' => Auth::user()['name'],
            ]);

        return $this->opsRedirect($res, $kodcaw, $batchId, 'Semua rekod menunggu dalam batch diluluskan.');
    }

    public function operasiMarkPaid(Request $request, $kodcaw, $id)
    {
        $payload = $this->buildPaidPayload($request);
        if (isset($payload['error'])) {
            return redirect()->back()->with('error', $payload['error']);
        }

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/pembiayaan-online/operasi/' . $kodcaw . '/lines/' . $id . '/paid', $payload);

        return $this->opsRedirect($res, $kodcaw, $request->input('batch_id'), 'Rekod ditanda PAID.');
    }

    public function operasiMarkPaidBatch(Request $request, $kodcaw, $batchId)
    {
        $payload = $this->buildPaidPayload($request);
        if (isset($payload['error'])) {
            return redirect()->back()->with('error', $payload['error']);
        }

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/pembiayaan-online/operasi/' . $kodcaw . '/batches/' . $batchId . '/paid', $payload);

        return $this->opsRedirect($res, $kodcaw, $batchId, 'Rekod APPROVED dalam batch ditanda PAID.');
    }

    /**
     * @return array
     */
    protected function buildPaidPayload(Request $request)
    {
        $noRujukan = trim((string) $request->input('no_rujukan_bayaran', ''));
        if ($noRujukan === '') {
            return ['error' => 'No. rujukan bayaran diperlukan.'];
        }

        if (!$request->hasFile('bukti')) {
            return ['error' => 'Fail bukti bayaran diperlukan.'];
        }

        $file = $request->file('bukti');
        if (!$file->isValid()) {
            return ['error' => 'Fail bukti tidak sah.'];
        }

        $raw = base64_encode(file_get_contents($file->getRealPath()));
        $mime = $file->getMimeType() ?: 'application/octet-stream';

        return [
            'ops_by' => Auth::user()['name'],
            'no_rujukan_bayaran' => $noRujukan,
            'tarikh_bayaran' => $request->input('tarikh_bayaran') ?: date('Y-m-d'),
            'bukti_data' => $raw,
            'bukti_filename' => $file->getClientOriginalName(),
            'bukti_type' => $mime,
        ];
    }

    protected function opsRedirect($res, $kodcaw, $batchId, $successMsg)
    {
        $batchId = $batchId ?: null;

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Tindakan gagal.';
            return redirect()->back()->with('error', $msg);
        }

        if ($batchId) {
            return redirect()
                ->route('pembiayaan.online.operasi.batch', ['kodcaw' => $kodcaw, 'batchId' => $batchId])
                ->with('message', $successMsg);
        }

        return redirect()->route('pembiayaan.online.operasi')->with('message', $successMsg);
    }

    /**
     * PC: modal online float + top-up request form/history.
     */
    public function topupIndex(Request $request)
    {
        $auth_user = Auth::user();
        $kodcaw = $this->kodcaw();
        $api_url = config('api.url');
        $status = $request->input('status', '');

        $cawangan_info = $this->api()
            ->get($api_url . '/api/cawangan/' . $kodcaw)
            ->json();

        $modal = $this->api()
            ->get($api_url . '/api/modal-online/' . $kodcaw)
            ->json();

        $query = [];
        if ($status !== '' && $status !== 'all') {
            $query['status'] = $status;
        }

        $reqRes = $this->api()
            ->get($api_url . '/api/modal-online/' . $kodcaw . '/topup/requests', $query)
            ->json();

        $requests = $reqRes['data'] ?? [];
        if (!is_array($requests)) {
            $requests = [];
        }

        $pendingRes = $this->api()
            ->get($api_url . '/api/modal-online/' . $kodcaw . '/topup/requests', ['status' => 'PENDING'])
            ->json();
        $pendingList = $pendingRes['data'] ?? [];
        $hasPending = is_array($pendingList) && count($pendingList) > 0;
        $isMissing = !empty($modal['missing']);
        $pendingRequest = $modal['pending_request'] ?? null;
        if (!$pendingRequest && $hasPending) {
            $pendingRequest = $pendingList[0];
        }

        return view('pembiayaan_online.pc.topup', compact(
            'auth_user',
            'kodcaw',
            'api_url',
            'cawangan_info',
            'modal',
            'requests',
            'status',
            'hasPending',
            'isMissing',
            'pendingRequest'
        ));
    }

    /**
     * PC: submit top-up request.
     */
    public function topupRequest(Request $request)
    {
        $kodcaw = $this->kodcaw();
        $amaun = (float) $request->input('amaun', 0);

        if ($amaun <= 0) {
            return redirect()->back()->with('error', 'Amaun mesti lebih daripada 0.');
        }

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/modal-online/' . $kodcaw . '/topup/request', [
                'amaun' => $amaun,
                'dimohon_oleh' => Auth::user()['name'],
                'nota' => $request->input('nota'),
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal hantar permohonan.';
            return redirect()->back()->with('error', $msg)->withInput();
        }

        return redirect()
            ->route('pembiayaan.online.pc.topup')
            ->with('message', 'Permohonan modal online dihantar. Menunggu kelulusan Operasi.');
    }

    /**
     * Operasi: senarai permohonan tambah modal online.
     */
    public function operasiTopupIndex(Request $request)
    {
        $auth_user = Auth::user();
        $api_url = config('api.url');
        $status = $request->input('status', 'PENDING');
        $tarikh = $request->input('tarikh');

        $query = [];
        if ($status === 'all') {
            $query['status'] = 'all';
        } elseif ($status !== '' && $status !== null) {
            $query['status'] = $status;
        } else {
            $query['status'] = 'PENDING';
        }
        if ($tarikh) {
            $query['tarikh'] = $tarikh;
        }

        $res = $this->api()
            ->get($api_url . '/api/modal-online/operasi/topup/requests', $query)
            ->json();

        $requests = $res['data'] ?? [];
        if (!is_array($requests)) {
            $requests = [];
        }

        return view('pembiayaan_online.operasi.topup', compact(
            'auth_user',
            'api_url',
            'requests',
            'status',
            'tarikh'
        ));
    }

    public function operasiTopupApprove(Request $request, $id)
    {
        $amaun = $request->input('amaun');
        if ($amaun !== null && $amaun !== '' && (float) $amaun <= 0) {
            return redirect()->back()->with('error', 'Amaun diluluskan mesti lebih daripada 0.');
        }

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/modal-online/operasi/topup/' . $id . '/approve', [
                'diluluskan_oleh' => Auth::user()['name'],
                'nota' => $request->input('nota'),
                'amaun' => $amaun,
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal lulus permohonan.';
            return redirect()->back()->with('error', $msg);
        }

        $amaunLulus = $res->json()['request']['amaun'] ?? $amaun;
        return redirect()
            ->route('pembiayaan.online.operasi.topup')
            ->with('message', 'Permohonan diluluskan RM ' . number_format((float) $amaunLulus, 2) . '. Modal online cawangan dikemas kini.');
    }

    public function operasiTopupReject(Request $request, $id)
    {
        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/modal-online/operasi/topup/' . $id . '/reject', [
                'diluluskan_oleh' => Auth::user()['name'],
                'nota' => $request->input('nota'),
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal tolak permohonan.';
            return redirect()->back()->with('error', $msg);
        }

        return redirect()
            ->route('pembiayaan.online.operasi.topup')
            ->with('message', 'Permohonan ditolak.');
    }

    /**
     * PC: EOD close branch modal online.
     */
    public function closeModal(Request $request)
    {
        $kodcaw = $this->kodcaw();

        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/modal-online/' . $kodcaw . '/close', [
                'ditutup_oleh' => Auth::user()['name'],
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal tutup modal online.';
            return redirect()->back()->with('error', $msg);
        }

        $dikembalikan = $res->json()['dikembalikan'] ?? 0;
        return redirect()
            ->route('pembiayaan.online.pc.topup')
            ->with('message', 'Modal online ditutup. Baki dikembalikan RM ' . number_format((float) $dikembalikan, 2) . '.');
    }

    /**
     * Operasi: EOD dashboard semua cawangan.
     */
    public function operasiEodIndex(Request $request)
    {
        $auth_user = Auth::user();
        $api_url = config('api.url');
        $tarikh = $request->input('tarikh') ?: date('Y-m-d');

        $res = $this->api()
            ->get($api_url . '/api/modal-online/operasi/eod', [
                'zone' => 'all',
                'tarikh' => $tarikh,
            ])
            ->json();

        $rows = $res['data'] ?? [];
        if (!is_array($rows)) {
            $rows = [];
        }

        $summary = [
            'open' => $res['open'] ?? 0,
            'closed' => $res['closed'] ?? 0,
            'missing' => $res['missing'] ?? 0,
            'bilangan' => $res['bilangan'] ?? count($rows),
        ];

        return view('pembiayaan_online.operasi.eod', compact(
            'auth_user',
            'api_url',
            'rows',
            'tarikh',
            'summary'
        ));
    }

    public function operasiCloseModal(Request $request, $kodcaw)
    {
        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/modal-online/' . $kodcaw . '/close', [
                'ditutup_oleh' => Auth::user()['name'],
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal tutup modal online.';
            return redirect()->back()->with('error', $msg);
        }

        return redirect()
            ->route('pembiayaan.online.operasi.eod')
            ->with('message', 'Modal online ' . $kodcaw . ' ditutup.');
    }

    public function operasiCloseAllModal(Request $request)
    {
        $res = $this->api()
            ->asForm()
            ->post(config('api.url') . '/api/modal-online/operasi/eod/close-all', [
                'ditutup_oleh' => Auth::user()['name'],
                'zone' => 'all',
            ]);

        if (!$res->successful()) {
            $body = $res->json();
            $msg = is_array($body) && isset($body['message']) ? $body['message'] : 'Gagal tutup semua modal online.';
            return redirect()->back()->with('error', $msg);
        }

        $closed = $res->json()['closed'] ?? 0;
        $skipped = $res->json()['skipped'] ?? 0;
        return redirect()
            ->route('pembiayaan.online.operasi.eod')
            ->with('message', 'EOD selesai: ' . $closed . ' ditutup, ' . $skipped . ' sudah ditutup.');
    }
}