using System.Data;
using System.Globalization;
using System.Xml.Serialization;
using Google.Apis.Sheets.v4;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Data.SqlClient;
using Microsoft.EntityFrameworkCore;
using WebAPI.dataParsers;
using WebAPI.Exports;
using WebAPI.Models;
using static Google.Apis.Drive.v3.FilesResource;

namespace WebAPI.Controllers
{
    [ApiController]
    [Route("api/[controller]")]

    public class AdminController : Controller
    {
        private readonly AppDbContext db;
        private GoogleDriveHelper googleDriveHelper;
        private GoogleSheetsHelper googleSheetsHelper;
        private readonly IConfiguration configuration;
        private readonly LogsController logsController;

        public AdminController(
            AppDbContext _db,
            GoogleSheetsHelper _googleSheetsHelper,
            GoogleDriveHelper _googleDriveHelper,
            IConfiguration _configuration)
        {
            db = _db;
            googleSheetsHelper = _googleSheetsHelper;
            googleDriveHelper = _googleDriveHelper;
            configuration = _configuration;
            logsController = new LogsController(googleSheetsHelper, googleDriveHelper, configuration);
        }

        [HttpGet]
        [Route("BackupDatabase/{apiKey}")]
        [AllowAnonymous]
        public IActionResult BackupDatabase(string apiKey)
        {
            if (Request.Host.Value != configuration["apiLocalUrl"] || apiKey != configuration["apiKey"])
            {
                return Unauthorized();
            }
            try
            {
                string databaseName = "diunabi-morska";
                string localDatabasePath = $"{configuration["dbBackupFile"]}-{DateTime.UtcNow.Day}.bak";
                var formatMediaName = $"DatabaseToolkitBackup_{databaseName}";
                var formatName = $"Full Backup of {databaseName}";

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

                var 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();

                Google.Apis.Drive.v3.Data.File body = new Google.Apis.Drive.v3.Data.File();
                body.Name = Path.GetFileName(localDatabasePath);
                body.Parents = new List<string?> { configuration["GDriveBackupDirectory"] };
                body.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");
                }
                CreateMediaUpload request = googleDriveHelper.Service.Files.Create(body, fsSource, body.MimeType);
                request.Fields = "id";

                var response = 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());
            }
        }
    }
}