<?php

class WarehouseProjectController extends TTCrud {
    protected string $headerTitle = 'Projekte';
    protected string $singleText = 'Projekt';
    protected bool $createText = false;

    //@formatter:off
    protected array $columns = [
        ['key' => 'id', 'text' => 'ID', 'table' => false, 'modal' => false],
        ['key' => 'projectNumber', 'text' => 'Projekt-Nr.', 'required' => false, 'modal' => ['disabled' => true, 'placeholder' => 'Wird automatisch generiert']],
        ['key' => 'title', 'text' => 'Bezeichnung', 'required' => true],
        ['key' => 'status', 'text' => 'Status', 'required' => true, 'modal' => ['type' => 'select', 'items' => [
            ['value' => 'new', 'text' => 'Neu'],
            ['value' => 'wip', 'text' => 'In Bearbeitung'],
            ['value' => 'finished', 'text' => 'Abgeschlossen'],
            ['value' => 'cancelled', 'text' => 'Storniert'],
        ]], 'table' => ['filter' => 'select']],
        ['key' => 'startDate', 'text' => 'Startdatum', 'required' => true, 'modal' => ['type' => 'date'], 'table' => ['filter' => 'date']],
        ['key' => 'endDate', 'text' => 'Enddatum', 'required' => true, 'modal' => ['type' => 'date'], 'table' => ['filter' => 'date']],
        ['key' => 'financials', 'text' => 'Gesamtsumme', 'required' => false, 'modal' => ['disabled' => true], 'table' => ['formatter' => 'formatPrice']],
        ['key' => 'storageLocation', 'text' => 'Lagerort', 'required' => false],
        ['key' => 'externalTeam', 'text' => 'Externes Team', 'required' => false, 'modal' => ['type' => 'textarea'], 'table' => false],
        ['key' => 'description', 'text' => 'Beschreibung', 'required' => false, 'modal' => ['type' => 'textarea'], 'table' => false],
        ['key' => 'create', 'text' => 'Erstellt', 'required' => false, 'modal' => false, 'table' => ['formatter' => 'formatDate']],
        ['key' => 'actions', 'text' => 'Aktionen', 'required' => false, 'modal' => false, 'table' => ['filter' => false, 'sortable' => false, 'class' => 'text-center']],
    ];
    //@formatter:on

    protected array $permissionCheck = ['WarehouseUser'];
    protected array $additionalJSVariables = ['WAREHOUSE_ADMIN' => false];

    protected function prepareCrudConfig(): void {
        if ($this->user->can('WarehouseAdmin')) {
            $this->additionalJSVariables['WAREHOUSE_ADMIN'] = true;
        }
    }

    private array $tempInternalTeam = [];

    protected function beforeCreate($postData): bool {
        $json = json_decode(file_get_contents('php://input'), true);
        if ($json) {
            $this->postData = array_merge($this->postData ?? [], $json);
        }

        if (isset($this->postData['internalTeam'])) {
            $this->tempInternalTeam = $this->postData['internalTeam'];
            unset($this->postData['internalTeam']);
        }

        $this->postData['projectNumber'] = WarehouseProjectModel::getNextProjectNumber();
        // Ensure defaults if not provided
        if (!isset($this->postData['status'])) $this->postData['status'] = 'new';
        if (!isset($this->postData['financials'])) $this->postData['financials'] = 0.00;
        
        return true;
    }

    protected function afterCreate($id, $postData): void
    {
        WarehouseProjectJournalModel::create([
            'projectId' => $id,
            'text' => 'Projekt erstellt.',
            'createBy' => $this->user->id,
            'create' => time()
        ]);

        // Handle initial Internal Team
        if (!empty($this->tempInternalTeam) && is_array($this->tempInternalTeam)) {
            foreach ($this->tempInternalTeam as $userId) {
                WarehouseProjectMemberModel::create([
                    'projectId' => $id,
                    'userId' => $userId,
                    'create' => time()
                ]);
                
                $u = UserModel::getOne($userId);
                $this->logJournal($id, "Teammitglied initial hinzugefügt: " . ($u ? $u->name : $userId));
            }
        }
    }

    protected function afterUpdate($id, $postData): void
    {
        // Simple journaling of main record update
        WarehouseProjectJournalModel::create([
            'projectId' => $id,
            'text' => 'Projektstammdaten aktualisiert.',
            'createBy' => $this->user->id,
            'create' => time()
        ]);
    }

    // --- API for Vue ---

    public function getProjectDetailsAction() {
        $id = $this->request->id;
        if (!$id) self::sendError("Projekt ID fehlt");

        $project = WarehouseProjectModel::get($id);
        if (!$project) self::sendError("Projekt nicht gefunden");

        self::returnJson(['project' => $project]);
    }

    public function getTasksAction() {
        $projectId = $this->request->id;
        if (!$projectId) self::sendError("Projekt ID fehlt");

        $tasks = WarehouseProjectTaskModel::getAll(['projectId' => $projectId], null, 0, ['key' => 'order', 'order' => 'ASC']);
        foreach ($tasks as $task) {
            if ($task->assignedUserId) {
                $user = UserModel::getOne($task->assignedUserId);
                $task->assignedUserName = $user ? $user->name : 'Unbekannt';
            } else {
                $task->assignedUserName = null;
            }
        }
        self::returnJson($tasks);
    }

    public function saveTaskAction() {
        $data = json_decode(file_get_contents('php://input'), true);
        $projectId = $data['projectId'] ?? null;
        
        if (!$projectId) self::sendError("Projekt ID fehlt");

        $taskData = [
            'projectId' => $projectId,
            'title' => $data['title'],
            'description' => $data['description'] ?? '',
            'status' => $data['status'] ?? 'todo',
            'assignedUserId' => !empty($data['assignedUserId']) ? $data['assignedUserId'] : null,
            'createBy' => $this->user->id,
            'create' => time()
        ];

        if (!empty($data['id'])) {
            $existingTask = WarehouseProjectTaskModel::get($data['id']);
            if (!$existingTask) self::sendError("Aufgabe nicht gefunden");

            // Merge existing data with new data to ensure all required fields are present
            $updatedData = array_merge((array)$existingTask, $taskData);
            $updatedData['id'] = $data['id']; // Ensure ID is in the data for update

            // update method expects an array with 'id' key for update.
            WarehouseProjectTaskModel::update($updatedData);
            $this->logJournal($projectId, "Aufgabe aktualisiert: {$data['title']}");
        } else {
            // Get max order to append
            $count = WarehouseProjectTaskModel::count(['projectId' => $projectId]);
            $taskData['order'] = $count + 1;
            
            WarehouseProjectTaskModel::create($taskData);
            $this->logJournal($projectId, "Aufgabe erstellt: {$data['title']}");
        }

        self::returnJson(['success' => true]);
    }
    
    public function updateTaskStatusAction() {
        $data = json_decode(file_get_contents('php://input'), true);
        if (empty($data['id']) || empty($data['status'])) self::sendError("Daten fehlen");
        
        $task = WarehouseProjectTaskModel::get($data['id']);
        if ($task) {
            // Retrieve existing task data to preserve projectId and other required fields
            $updatedData = (array)$task;
            $updatedData['status'] = $data['status'];
            
            // WarehouseProjectTaskModel::update expects an array with 'id' key for update.
            WarehouseProjectTaskModel::update($updatedData);
            $this->logJournal($task->projectId, "Aufgabenstatus '{$task->title}' geändert auf {$data['status']}");
        }
        self::returnJson(['success' => true]);
    }

    public function deleteTaskAction() {
        $id = $this->request->id;
        if (!$id) self::sendError("ID fehlt");
        
        $task = WarehouseProjectTaskModel::get($id);
        if ($task) {
            WarehouseProjectTaskModel::delete($id);
            $this->logJournal($task->projectId, "Aufgabe gelöscht: {$task->title}");
        }
        self::returnJson(['success' => true]);
    }
    
    public function getTeamAction() {
        $projectId = $this->request->id;
        if (!$projectId) self::sendError("ID fehlt");
        
        $members = WarehouseProjectMemberModel::getAll(['projectId' => $projectId]);
        $users = [];
        foreach($members as $m) {
            $u = UserModel::getOne($m->userId);
            if ($u) {
                $users[] = [
                    'memberId' => $m->id,
                    'userId' => $u->id,
                    'name' => $u->name,
                    'role' => $m->role
                ];
            }
        }
        self::returnJson($users);
    }
    
    public function addTeamMemberAction() {
        $data = json_decode(file_get_contents('php://input'), true);
        if (empty($data['projectId']) || empty($data['userId'])) self::sendError("Daten fehlen");
        
        $exists = WarehouseProjectMemberModel::count(['projectId' => $data['projectId'], 'userId' => $data['userId']]);
        if ($exists > 0) self::sendError("Benutzer bereits im Team");
        
        WarehouseProjectMemberModel::create([
            'projectId' => $data['projectId'],
            'userId' => $data['userId'],
            'role' => $data['role'] ?? null,
            'create' => time()
        ]);
        
        $u = UserModel::getOne($data['userId']);
        $this->logJournal($data['projectId'], "Teammitglied hinzugefügt: " . ($u ? $u->name : $data['userId']));
        
        self::returnJson(['success' => true]);
    }
    
    public function removeTeamMemberAction() {
        $id = $this->request->id;
        $member = WarehouseProjectMemberModel::get($id);
        if ($member) {
            $u = UserModel::getOne($member->userId);
            WarehouseProjectMemberModel::delete($id);
            $this->logJournal($member->projectId, "Teammitglied entfernt: " . ($u ? $u->name : $member->userId));
        }
        self::returnJson(['success' => true]);
    }

    public function getAvailableOrderRequestsAction() {
        // Return open requests (not done, not cancelled)
        // You might want to filter out ones already linked to THIS project, but maybe not strictly necessary.
        $requests = WarehouseOrderRequest::getAll([], 100, 0, ['key' => 'create', 'order' => 'DESC']);
        
        $available = [];
        foreach($requests as $r) {
            if (!$r->done && !$r->cancelled) {
                $available[] = [
                    'id' => $r->id,
                    'purpose' => $r->purpose,
                    'create' => $r->create
                ];
            }
        }
        self::returnJson($available);
    }

    public function getLinkedOrdersAction() {
        $projectId = $this->request->id;
        if (!$projectId) self::sendError("ID fehlt");
        
        $links = WarehouseProjectOrderRequestModel::getAll(['projectId' => $projectId]);
        $result = [];
        
        foreach($links as $l) {
            $req = WarehouseOrderRequest::get($l->orderRequestId);
            if ($req) {
                $positions = json_decode($req->positions, true);
                
                // Resolve actual Orders
                $orders = [];
                $ids = [];
                
                if (!empty($req->linkedOrderIds)) {
                    // Check if it is JSON array
                    $decoded = json_decode($req->linkedOrderIds, true);
                    if (is_array($decoded)) {
                        $ids = $decoded;
                    } else {
                        // Fallback to comma separated
                        $ids = explode(',', $req->linkedOrderIds);
                    }
                }

                foreach($ids as $oid) {
                    $oid = trim($oid);
                    if (empty($oid)) continue;
                    
                    $o = WarehouseOrderModel::get($oid);
                    if ($o) {
                        $orders[] = [
                            'id' => $o->id,
                            'orderNumber' => $o->orderNumber,
                            'status' => $o->status,
                            'distributorId' => $o->distributorId
                        ];
                    }
                }

                $result[] = [
                    'linkId' => $l->id,
                    'requestId' => $req->id,
                    'purpose' => $req->purpose,
                    'create' => $req->create,
                    'status' => $req->done ? 'done' : ($req->cancelled ? 'cancelled' : 'open'),
                    'positionsCount' => is_array($positions) ? count($positions) : 0,
                    'orders' => $orders
                ];
            }
        }
        self::returnJson($result);
    }
    
    public function linkOrderAction() {
        $data = json_decode(file_get_contents('php://input'), true);
        if (empty($data['projectId']) || empty($data['orderId'])) self::sendError("Daten fehlen");
        
        $order = WarehouseOrderRequest::get($data['orderId']);
        if (!$order) self::sendError("Bestellwunsch nicht gefunden");
        
        WarehouseProjectOrderRequestModel::create([
            'projectId' => $data['projectId'],
            'orderRequestId' => $data['orderId'],
            'create' => time()
        ]);
        
        $this->logJournal($data['projectId'], "Bestellwunsch #{$data['orderId']} verknüpft.");
        self::returnJson(['success' => true]);
    }
    
    public function unlinkOrderAction() {
        $id = $this->request->id;
        $link = WarehouseProjectOrderRequestModel::get($id);
        if ($link) {
            WarehouseProjectOrderRequestModel::delete($id);
            $this->logJournal($link->projectId, "Bestellwunsch #{$link->orderRequestId} Verknüpfung aufgehoben.");
        }
        self::returnJson(['success' => true]);
    }
    
    public function createJournalEntryAction() {
        $data = json_decode(file_get_contents('php://input'), true);
        if (empty($data['projectId'])) self::sendError("Projekt ID fehlt");
        
        $this->logJournal($data['projectId'], $data['message'] ?? '');
        self::returnJson(['success' => true]);
    }
    
    public function getJournalAction() {
        $projectId = $this->request->id;
         $logs = WarehouseProjectJournalModel::getAll(['projectId' => $projectId], null, 0, ['order' => 'DESC', 'key' => 'create']);
         
         foreach($logs as $log) {
             $u = UserModel::getOne($log->createBy);
             $log->userName = $u ? $u->name : 'System';
         }
         
         self::returnJson($logs);
    }

    private function logJournal($projectId, $text) {
        WarehouseProjectJournalModel::create([
            'projectId' => $projectId,
            'text' => $text,
            'createBy' => $this->user->id,
            'create' => time()
        ]);
    }
    
    // Users for Team Selection
    public function getUsersAction() {
        $users = array_map(function($u) {
            return ['id' => $u->id, 'name' => $u->name];
        }, UserModel::search(['employee' => true]));
        self::returnJson($users);
    }
}