using System.Data;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Data.SqlClient;
using WebAPI.Models;

namespace WebAPI.Controllers;

[ApiController]
[Route("api/[controller]")]
public class AdminController : Controller
{
    private readonly GoogleDriveHelper _googleDriveHelper;
    private readonly IConfiguration _configuration;
    private readonly LogsController _logsController;

    public AdminController(
        GoogleDriveHelper googleDriveHelper,
        GoogleSheetsHelper googleSheetsHelper,
        IConfiguration configuration)
    {
        _googleDriveHelper = googleDriveHelper;
        _configuration = configuration;
        _logsController = new LogsController(googleSheetsHelper, _configuration);
    }

    [HttpGet]
    [Route("BackupDatabase/{apiKey}")]
    [AllowAnonymous]
    public IActionResult BackupDatabase(string apiKey)
    {
        if (Request.Host.Value != _configuration["apiLocalUrl"] || apiKey != _configuration["apiKey"])
        {
            return Unauthorized();
        }

        try
        {
            const string databaseName = "diunabi-morska";
            var localDatabasePath = $"{_configuration["dbBackupFile"]}-{DateTime.UtcNow.Day}.bak";
            const string formatMediaName = $"DatabaseToolkitBackup_{databaseName}";
            const string formatName = $"Full Backup of {databaseName}";

            
            var connection = new SqlConnection(_configuration.GetConnectionString("SQLDatabase"));

            const string sql = """
                               BACKUP DATABASE @databaseName
                                                   TO DISK = @localDatabasePath
                                                   WITH FORMAT,
                                                     MEDIANAME = @formatMediaName,
                                                       NAME = @formatName
                               """;

            connection.Open();
            var command = new SqlCommand(sql, connection);

            command.CommandType = CommandType.Text;
            command.CommandTimeout = 7200;
            command.Parameters.AddWithValue("@databaseName", databaseName);
            command.Parameters.AddWithValue("@localDatabasePath", localDatabasePath);
            command.Parameters.AddWithValue("@formatMediaName", formatMediaName);
            command.Parameters.AddWithValue("@formatName", formatName);

            command.ExecuteNonQuery();

            var body = new Google.Apis.Drive.v3.Data.File
            {
                Name = Path.GetFileName(localDatabasePath),
                Parents = new List<string?> { "1ANm0pokPFgBw7vIaxLgDWXqznl3UjVvJ" },
                MimeType = "application/octet-stream"
            };

            var fsSource = new FileStream(localDatabasePath, FileMode.Open, FileAccess.Read);

            if (_googleDriveHelper.Service is null)
            {
                throw new Exception("Google Drive API not initialized");
            }

            var request = _googleDriveHelper.Service.Files.Create(body, fsSource, body.MimeType);
            request.Fields = "id";
            
            request.Upload();
                
            _logsController.AddEntry(new LogEntry
            {
                Title = "Backup success",
                Type = LogEntryType.Info,
                LogType = LogType.Backup,
                CreatedAt = DateTime.UtcNow
            });
            return Ok();
        }
        catch (Exception e)
        {
            _logsController.AddEntry(new LogEntry
            {
                Title = "Backup error",
                Type = LogEntryType.Error,
                LogType = LogType.Backup,
                Message = e.ToString(),
                CreatedAt = DateTime.UtcNow
            });
            return BadRequest(e.ToString());
        }
    }

    [HttpGet]
    [Route("Version")]
    public IActionResult GetVersion() {
        return Ok(new { version = _configuration["app-version"] });
    }
}