<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Core\Auth;
use App\Core\DB;
use App\Core\View;

class AdminBoardFieldController
{
    private function requireAdmin(): void
    {
        if (!Auth::check()) {
            header('Location: /login');
            exit;
        }

        $user = Auth::user();

        if ((int)($user['is_admin'] ?? 0) !== 1) {
            http_response_code(403);
            echo 'Доступ запрещен';
            exit;
        }
    }

    public function index(): void
    {
        $this->requireAdmin();

        $boardId = (int)($_GET['id'] ?? 0);

        $pdo = DB::connection();

        $stmt = $pdo->prepare("SELECT id, name, code FROM boards WHERE id = ? LIMIT 1");
        $stmt->execute([$boardId]);
        $board = $stmt->fetch();

        if (!$board) {
            http_response_code(404);
            echo 'Доска не найдена';
            return;
        }

        $stmt = $pdo->prepare("
            SELECT *
            FROM board_fields
            WHERE board_id = ?
            ORDER BY sort_order ASC, id ASC
        ");
        $stmt->execute([$boardId]);
        $fields = $stmt->fetchAll();

        View::render('admin/boards/fields/index', [
            'board' => $board,
            'fields' => $fields,
            'user' => Auth::user(),
        ]);
    }

    public function create(): void
    {
        $this->requireAdmin();

        $boardId = (int)($_GET['board_id'] ?? 0);

        $pdo = DB::connection();
        $stmt = $pdo->prepare("SELECT id, name, code FROM boards WHERE id = ? LIMIT 1");
        $stmt->execute([$boardId]);
        $board = $stmt->fetch();

        if (!$board) {
            http_response_code(404);
            echo 'Доска не найдена';
            return;
        }

        View::render('admin/boards/fields/create', [
            'board' => $board,
            'user' => Auth::user(),
        ]);
    }

    public function store(): void
    {
        $this->requireAdmin();

        $boardId = (int)($_POST['board_id'] ?? 0);
        $code = trim((string)($_POST['code'] ?? ''));
        $name = trim((string)($_POST['name'] ?? ''));
        $fieldType = trim((string)($_POST['field_type'] ?? 'text'));
        $isRequired = isset($_POST['is_required']) ? 1 : 0;
        $isActive = isset($_POST['is_active']) ? 1 : 0;
        $sortOrder = (int)($_POST['sort_order'] ?? 100);

        $settings = null;
        if ($fieldType === 'select') {
            $rawOptions = trim((string)($_POST['select_options'] ?? ''));
            $options = array_values(array_filter(array_map('trim', preg_split('/\r\n|\r|\n/', $rawOptions))));
            $settings = json_encode(['options' => $options], JSON_UNESCAPED_UNICODE);
        }

        if ($boardId <= 0 || $code === '' || $name === '') {
            $_SESSION['error'] = 'Заполни обязательные поля';
            header('Location: /admin/boards/fields/create?board_id=' . $boardId);
            exit;
        }

        $pdo = DB::connection();

        $stmt = $pdo->prepare("
            INSERT INTO board_fields (
                board_id, code, name, field_type, is_required, sort_order, is_active, settings_json, created_at, updated_at
            ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, NOW(), NOW())
        ");
        $stmt->execute([
            $boardId,
            $code,
            $name,
            $fieldType,
            $isRequired,
            $sortOrder,
            $isActive,
            $settings,
        ]);

        header('Location: /admin/boards/fields?id=' . $boardId);
        exit;
    }

    public function edit(): void
    {
        $this->requireAdmin();

        $fieldId = (int)($_GET['id'] ?? 0);

        $pdo = DB::connection();
        $stmt = $pdo->prepare("
            SELECT bf.*, b.name AS board_name, b.code AS board_code
            FROM board_fields bf
            INNER JOIN boards b ON b.id = bf.board_id
            WHERE bf.id = ?
            LIMIT 1
        ");
        $stmt->execute([$fieldId]);
        $field = $stmt->fetch();

        if (!$field) {
            http_response_code(404);
            echo 'Поле не найдено';
            return;
        }

        View::render('admin/boards/fields/edit', [
            'field' => $field,
            'user' => Auth::user(),
        ]);
    }

    public function update(): void
    {
        $this->requireAdmin();

        $fieldId = (int)($_POST['id'] ?? 0);
        $code = trim((string)($_POST['code'] ?? ''));
        $name = trim((string)($_POST['name'] ?? ''));
        $fieldType = trim((string)($_POST['field_type'] ?? 'text'));
        $isRequired = isset($_POST['is_required']) ? 1 : 0;
        $isActive = isset($_POST['is_active']) ? 1 : 0;
        $sortOrder = (int)($_POST['sort_order'] ?? 100);

        $settings = null;
        if ($fieldType === 'select') {
            $rawOptions = trim((string)($_POST['select_options'] ?? ''));
            $options = array_values(array_filter(array_map('trim', preg_split('/\r\n|\r|\n/', $rawOptions))));
            $settings = json_encode(['options' => $options], JSON_UNESCAPED_UNICODE);
        }

        if ($fieldId <= 0 || $code === '' || $name === '') {
            $_SESSION['error'] = 'Заполни обязательные поля';
            header('Location: /admin');
            exit;
        }

        $pdo = DB::connection();

        $stmt = $pdo->prepare("SELECT board_id FROM board_fields WHERE id = ? LIMIT 1");
        $stmt->execute([$fieldId]);
        $boardId = (int)$stmt->fetchColumn();

        $stmt = $pdo->prepare("
            UPDATE board_fields
            SET
                code = ?,
                name = ?,
                field_type = ?,
                is_required = ?,
                sort_order = ?,
                is_active = ?,
                settings_json = ?,
                updated_at = NOW()
            WHERE id = ?
        ");
        $stmt->execute([
            $code,
            $name,
            $fieldType,
            $isRequired,
            $sortOrder,
            $isActive,
            $settings,
            $fieldId,
        ]);

        header('Location: /admin/boards/fields?id=' . $boardId);
        exit;
    }
    public function delete(): void
    {
        $this->requireAdmin();

        $fieldId = (int)($_POST['id'] ?? 0);

        if ($fieldId <= 0) {
            $_SESSION['error'] = 'Поле не найдено';
            header('Location: /admin/boards');
            exit;
        }

        $pdo = DB::connection();

        $stmt = $pdo->prepare("
        SELECT id, board_id
        FROM board_fields
        WHERE id = ?
        LIMIT 1
    ");
        $stmt->execute([$fieldId]);
        $field = $stmt->fetch();

        if (!$field) {
            $_SESSION['error'] = 'Поле не найдено';
            header('Location: /admin/boards');
            exit;
        }

        $boardId = (int)$field['board_id'];

        $stmt = $pdo->prepare("DELETE FROM board_fields WHERE id = ?");
        $stmt->execute([$fieldId]);

        $_SESSION['success'] = 'Поле удалено';
        header('Location: /admin/boards/fields?id=' . $boardId);
        exit;
    }
}