using Microsoft.AspNetCore.Mvc;
using MongoDB.Bson;
using MongoDB.Driver;
using QrScanner.Models;

namespace server.Controllers;

[ApiController]
[Route("")]
public class QrScannerController : ControllerBase
{
	const string db_connection_url			= @"mongodb://localhost:27017";
	const string db_name					= @"qr_scanner";
	const string col_codes					= @"scans";
	const string col_info					= @"info";
	MongoClient client;
	IMongoDatabase db;

	public QrScannerController(){
		client = new MongoClient(db_connection_url);
		db = client.GetDatabase(db_name);
	}


	[HttpGet("ping")]
	public ActionResult<string> ping(){
		string message = "Ping received from server.";
		Console.WriteLine($"Sent message: {message}");
		return Ok(message);
	}


	[HttpGet("info")]
	public IActionResult info(){

		return Ok();
	}


	[HttpGet("scan")]
	public async Task<IActionResult> scan(string code){
		return await _store_code(code);
	}

	[HttpGet("codes")]
	public async Task<ActionResult<List<QrCode>>> get_codes(){
		return await _fetch_all_codes();
	}


	public async Task<IActionResult> _store_code(string code){
		Console.WriteLine(code);
		QrCode qr_code = new();
		qr_code.id = Guid.NewGuid().ToString();
		// qr_code.timestamp = DateTime.Now;
		qr_code.data = code;
		var col = db.GetCollection<QrCode>(col_codes);
		await col.InsertOneAsync(qr_code);
		return Ok(code);
	}


	public async Task<T> _fetch_one<T>(string collection){
		Console.WriteLine($"_fetch_one(): Fetching first found data from '{db_name}.{col_codes}'");
		var col = db.GetCollection<T>(collection);
		return await col.Find(new BsonDocument{}).FirstOrDefaultAsync();
	}


	public async Task<ActionResult<QrCode>> _fetch_code<T>(string field, T value){
		Console.WriteLine($"_fetch_code(): Fetching QR code from '{db_name}.{col_codes}'");
		var col = db.GetCollection<QrCode>(col_codes);
		var filter = Builders<QrCode>.Filter.Eq(field, value);
		return Ok(await col.Find(filter).FirstOrDefaultAsync());
	}


	public async Task<ActionResult<List<QrCode>>> _fetch_all_codes(){
		var col = db.GetCollection<QrCode>(col_codes);
		return await col.Find(f => true).ToListAsync();
	}
}