<?php

declare(strict_types=1);

namespace App\Controllers;

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

class AdminBoardSourceController
{
    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;
        }
    }

    private function extractSpreadsheetId(string $url): string
    {
        if (preg_match('~/spreadsheets/d/([a-zA-Z0-9-_]+)~', $url, $matches)) {
            return $matches[1];
        }

        return trim($url);
    }

    public function edit(): 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_sources
            WHERE board_id = ?
              AND source_type = 'google_sheet'
            LIMIT 1
        ");
        $stmt->execute([$boardId]);
        $source = $stmt->fetch();

        $stmt = $pdo->prepare("
            SELECT id, code, name
            FROM board_fields
            WHERE board_id = ?
              AND is_active = 1
            ORDER BY sort_order ASC, id ASC
        ");
        $stmt->execute([$boardId]);
        $customFields = $stmt->fetchAll();

        $mappings = [];
        if ($source) {
            $stmt = $pdo->prepare("
                SELECT target_type, target_key, source_column_name
                FROM board_source_mappings
                WHERE board_source_id = ?
                  AND is_active = 1
            ");
            $stmt->execute([$source['id']]);
            foreach ($stmt->fetchAll() as $row) {
                $mappings[$row['target_type'] . ':' . $row['target_key']] = $row['source_column_name'];
            }
        }

        $baseFields = [
            ['key' => 'creator_name', 'name' => 'Постановщик'],
            ['key' => 'assignee_name', 'name' => 'Ответственный'],
            ['key' => 'name', 'name' => 'Наименование'],
            ['key' => 'description', 'name' => 'Описание задачи'],
            ['key' => 'status', 'name' => 'Статус'],
            ['key' => 'priority', 'name' => 'Приоритет'],
            ['key' => 'crm_id', 'name' => 'CRM ID'],
            ['key' => 'completed_flag', 'name' => 'Выполнено'],
            ['key' => 'task_created_at', 'name' => 'Дата постановки'],
            ['key' => 'planned_at', 'name' => 'Дата план'],
            ['key' => 'completed_at', 'name' => 'Дата факт'],
        ];

        View::render('admin/boards/source/edit', [
            'board' => $board,
            'source' => $source,
            'baseFields' => $baseFields,
            'customFields' => $customFields,
            'mappings' => $mappings,
            'user' => Auth::user(),
        ]);
    }

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

        $boardId = (int)($_POST['board_id'] ?? 0);
        $spreadsheetUrl = trim((string)($_POST['spreadsheet_url'] ?? ''));
        $sheetName = trim((string)($_POST['sheet_name'] ?? ''));
        $syncMode = trim((string)($_POST['sync_mode'] ?? 'import_export'));
        $isActive = isset($_POST['is_active']) ? 1 : 0;

        if ($boardId <= 0 || $spreadsheetUrl === '' || $sheetName === '') {
            $_SESSION['error'] = 'Заполни ссылку и имя вкладки';
            header('Location: /admin/boards/source?id=' . $boardId);
            exit;
        }

        $spreadsheetId = $this->extractSpreadsheetId($spreadsheetUrl);

        if ($spreadsheetId === '') {
            $_SESSION['error'] = 'Не удалось определить Spreadsheet ID';
            header('Location: /admin/boards/source?id=' . $boardId);
            exit;
        }

        $pdo = DB::connection();
        $pdo->beginTransaction();

        try {
            $stmt = $pdo->prepare("
                SELECT id
                FROM board_sources
                WHERE board_id = ?
                  AND source_type = 'google_sheet'
                LIMIT 1
            ");
            $stmt->execute([$boardId]);
            $sourceId = (int)$stmt->fetchColumn();

            if ($sourceId > 0) {
                $stmt = $pdo->prepare("
                    UPDATE board_sources
                    SET
                        spreadsheet_url = ?,
                        source_key = ?,
                        sheet_name = ?,
                        sync_mode = ?,
                        is_active = ?,
                        updated_at = NOW()
                    WHERE id = ?
                ");
                $stmt->execute([
                    $spreadsheetUrl,
                    $spreadsheetId,
                    $sheetName,
                    $syncMode,
                    $isActive,
                    $sourceId,
                ]);
            } else {
                $stmt = $pdo->prepare("
                    INSERT INTO board_sources (
                        board_id,
                        source_type,
                        spreadsheet_url,
                        source_key,
                        sheet_name,
                        sync_mode,
                        is_active,
                        created_at,
                        updated_at
                    ) VALUES (?, 'google_sheet', ?, ?, ?, ?, ?, NOW(), NOW())
                ");
                $stmt->execute([
                    $boardId,
                    $spreadsheetUrl,
                    $spreadsheetId,
                    $sheetName,
                    $syncMode,
                    $isActive,
                ]);

                $sourceId = (int)$pdo->lastInsertId();
            }

            $stmt = $pdo->prepare("DELETE FROM board_source_mappings WHERE board_source_id = ?");
            $stmt->execute([$sourceId]);

            $baseMappings = $_POST['mapping_base'] ?? [];
            if (is_array($baseMappings)) {
                $stmt = $pdo->prepare("
                    INSERT INTO board_source_mappings (
                        board_source_id,
                        target_type,
                        target_key,
                        source_column_name,
                        is_active,
                        created_at,
                        updated_at
                    ) VALUES (?, 'base', ?, ?, 1, NOW(), NOW())
                ");

                foreach ($baseMappings as $key => $columnName) {
                    $columnName = trim((string)$columnName);
                    if ($columnName === '') {
                        continue;
                    }

                    $stmt->execute([$sourceId, $key, $columnName]);
                }
            }

            $customMappings = $_POST['mapping_custom'] ?? [];
            if (is_array($customMappings)) {
                $stmt = $pdo->prepare("
                    INSERT INTO board_source_mappings (
                        board_source_id,
                        target_type,
                        target_key,
                        source_column_name,
                        is_active,
                        created_at,
                        updated_at
                    ) VALUES (?, 'custom', ?, ?, 1, NOW(), NOW())
                ");

                foreach ($customMappings as $key => $columnName) {
                    $columnName = trim((string)$columnName);
                    if ($columnName === '') {
                        continue;
                    }

                    $stmt->execute([$sourceId, $key, $columnName]);
                }
            }

            $pdo->commit();
            $_SESSION['success'] = 'Интеграция Google Sheets сохранена';
        } catch (\Throwable $e) {
            $pdo->rollBack();
            $_SESSION['error'] = 'Ошибка сохранения интеграции: ' . $e->getMessage();
        }

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