<?php

namespace App\Services;

class GoogleSheetsService
{
    private string $spreadsheetId;
    private string $apiKey; // or Service Account JSON path

    public function __construct(string $spreadsheetId)
    {
        $this->spreadsheetId = $spreadsheetId;
        // In a real scenario, API Key or OAuth JSON should be loaded from env or DB
        $this->apiKey = 'DUMMY_API_KEY';
    }

    /**
     * Fetch data from a specific range using Google Sheets API v4
     */
    public function fetchData(string $range): array
    {
        // Mock implementation
        // The real implementation would use file_get_contents or cURL:
        // $url = "https://sheets.googleapis.com/v4/spreadsheets/{$this->spreadsheetId}/values/{$range}?key={$this->apiKey}";
        
        return [
            ['DOC001', 'ประชุมวิชาการประจำปี', 'เพื่อพัฒนาศักยภาพ', 'กรุงเทพมหานคร', '2023-11-01', '2023-11-05', '5000'],
            ['DOC002', 'อบรมหลักสูตร AI', 'เรียนรู้เทคโนโลยีใหม่', 'เชียงใหม่', '2023-12-10', '2023-12-12', '8000'],
        ];
    }

    /**
     * Parse raw data and map it to DB structure based on column mapping
     */
    public function parseData(array $rawData, array $mapping): array
    {
        $parsed = [];
        foreach ($rawData as $row) {
            $entry = [];
            foreach ($mapping as $index => $field) {
                $entry[$field] = $row[$index] ?? null;
            }
            $parsed[] = $entry;
        }
        return $parsed;
    }
}