<?php

namespace ServerManager\UI;

use PHPNative\Framework\Settings;
use PHPNative\Ui\Widget\Button;
use PHPNative\Ui\Widget\Container;
use PHPNative\Ui\Widget\Label;
use PHPNative\Ui\Widget\TextInput;

class KanbanTab
{
    private Container $tab;
    private Settings $settings;
    private Container $boardsContainer;
    private TextInput $newBoardInput;

    public function __construct(Settings $settings)
    {
        $this->settings = $settings;

        $this->ensureDefaultBoards();

        $this->tab = new Container('flex flex-col p-4 gap-4 bg-gray-50');
        $headerRow = new Container('flex flex-row items-center gap-2');

        $headerRow->addComponent(new Label('Kanban Tasks', 'text-xl font-bold text-black flex-1'));

        $this->newBoardInput = new TextInput(
            'Neues Board...',
            'w-60 border border-gray-300 rounded px-3 py-2 bg-white text-black text-sm',
        );
        $addBoardButton = new Button(
            'Board hinzufügen',
            'px-3 py-2 bg-blue-600 rounded hover:bg-blue-700',
            null,
            'text-white text-sm',
        );

        $headerRow->addComponent($this->newBoardInput);
        $headerRow->addComponent($addBoardButton);

        $this->tab->addComponent($headerRow);

        $this->boardsContainer = new Container(
            'flex flex-row gap-4 flex-1 overflow-auto bg-gray-100 rounded border border-gray-300 p-3',
        );
        $this->tab->addComponent($this->boardsContainer);

        $kanbanTab = $this;
        $addBoardButton->setOnClick(function () use ($kanbanTab) {
            $name = trim($kanbanTab->newBoardInput->getValue());
            if ($name === '') {
                return;
            }

            $boards = $kanbanTab->settings->get('kanban.boards', []);
            if (!is_array($boards)) {
                $boards = [];
            }

            if (!in_array($name, $boards, true)) {
                $boards[] = $name;
                $kanbanTab->settings->set('kanban.boards', $boards);
                $kanbanTab->settings->save();
            }

            $kanbanTab->newBoardInput->setValue('');
            $kanbanTab->renderBoards();
        });

        $this->renderBoards();
    }

    public function getContainer(): Container
    {
        return $this->tab;
    }

    public function refresh(): void
    {
        $this->renderBoards();
    }

    private function ensureDefaultBoards(): void
    {
        $boards = $this->settings->get('kanban.boards', null);
        if (!is_array($boards) || empty($boards)) {
            $boards = ['neu', 'in arbeit', 'fertig'];
            $this->settings->set('kanban.boards', $boards);
            $this->settings->save();
        }
    }

    private function renderBoards(): void
    {
        $this->boardsContainer->clearChildren();

        $boards = $this->settings->get('kanban.boards', []);
        if (!is_array($boards)) {
            $boards = [];
        }

        $tasks = $this->settings->get('kanban.tasks', []);
        if (!is_array($tasks)) {
            $tasks = [];
        }

        foreach ($boards as $boardName) {
            $column = new Container('flex flex-col bg-white rounded shadow-md w-64 max-h-full');

            $columnHeader = new Container('px-3 py-2 border-b border-gray-300 bg-gray-100');
            $columnHeader->addComponent(new Label($boardName, 'text-sm font-semibold text-gray-800'));
            $column->addComponent($columnHeader);

            $columnBody = new Container('flex flex-col gap-2 p-2 overflow-auto');

            $boardTasks = array_values(array_filter(
                $tasks,
                static fn($task) => ($task['board'] ?? 'neu') === $boardName,
            ));

            if (empty($boardTasks)) {
                $columnBody->addComponent(new Label('Keine Tasks', 'text-xs text-gray-400 italic'));
            } else {
                foreach ($boardTasks as $task) {
                    $title = (string) ($task['title'] ?? '');
                    $serverId = $task['server_id'] ?? null;
                    $serverLabel = $serverId !== null ? ('Server #' . $serverId) : 'Kein Server';

                    $card = new Container(
                        'flex flex-col gap-1 px-3 py-2 bg-white border border-gray-200 rounded shadow-sm',
                    );
                    $card->addComponent(new Label($title, 'text-xs text-gray-900'));
                    $card->addComponent(new Label($serverLabel, 'text-[10px] text-gray-500'));

                    $columnBody->addComponent($card);
                }
            }

            $column->addComponent($columnBody);
            $this->boardsContainer->addComponent($column);
        }
    }
}