using OI.Metrology.Server.Models;
using OI.Metrology.Shared.DataModels;
using OI.Metrology.Shared.Models.Stateless;
using System.Globalization;
using System.Text.Json;

namespace OI.Metrology.Server.Repository;

public class ExportRepository : IExportRepository
{

    private readonly string _MockRoot;
    private readonly Serilog.ILogger _Log;
    private readonly string _RepositoryName;
    private readonly AppSettings _AppSettings;
    private readonly Dictionary<string, Dictionary<long, HeaderCommon>> _RdsToHeaderCommonCollection;

    public ExportRepository(AppSettings appSettings)
    {
        _AppSettings = appSettings;
        _MockRoot = appSettings.MockRoot;
        _RdsToHeaderCommonCollection = new();
        _RepositoryName = nameof(ExportRepository)[..^10];
        _Log = Serilog.Log.ForContext<ExportRepository>();
    }

    private static string[] Get()
    {
        DateTime dateTime = DateTime.Now;
        DateTime lastWeekDateTime = dateTime.AddDays(-7);
        Calendar calendar = new CultureInfo("en-US").Calendar;
        string weekOfYear = $"{dateTime:yyyy}_Week_{calendar.GetWeekOfYear(dateTime, CalendarWeekRule.FirstDay, DayOfWeek.Sunday):00}";
        string lastWeekOfYear = $"{lastWeekDateTime:yyyy}_Week_{calendar.GetWeekOfYear(lastWeekDateTime, CalendarWeekRule.FirstDay, DayOfWeek.Sunday):00}";
        return new string[] { weekOfYear, lastWeekOfYear };
    }

    private List<string> GetFiles(HeaderCommon headerCommon, string searchPattern)
    {
        List<string> results = new();
        string directory;
        string[] weeks = Get();
        foreach (string weekYear in weeks)
        {
            directory = Path.Combine(_AppSettings.ApiExportPath, weekYear, $"-{headerCommon.PSN}", $"-{headerCommon.Reactor}", $"-{headerCommon.RDS}", $"-{headerCommon.ID}");
            if (!Directory.Exists(directory))
                continue;
            results.AddRange(Directory.GetFiles(directory, searchPattern, SearchOption.TopDirectoryOnly));
        }
        return results;
    }

    string IExportRepository.GetExport(HeaderCommon headerCommon)
    {
        string result;
        if (!string.IsNullOrEmpty(_MockRoot))
            result = File.ReadAllText(Path.Combine(string.Concat(AppContext.BaseDirectory, _MockRoot), $"{_RepositoryName}-{nameof(IExportRepository.GetExport)}.txt"));
        else
        {
            List<string> files = GetFiles(headerCommon, "*.txt");
            if (files.Count != 1)
                result = string.Empty;
            else
                result = File.ReadAllText(files.First());
        }
        return result;
    }

    Result<HeaderCommon[]> IExportRepository.GetHeaders(HeaderCommon headerCommon)
    {
        Result<HeaderCommon[]>? result;
        if (!string.IsNullOrEmpty(_MockRoot))
        {
            string json = File.ReadAllText(Path.Combine(string.Concat(AppContext.BaseDirectory, _MockRoot), $"{_RepositoryName}-{nameof(IExportRepository.GetHeaders)}.json"));
            result = JsonSerializer.Deserialize<Result<HeaderCommon[]>>(json);
            if (result is null)
                throw new NullReferenceException(nameof(result));
        }
        else
        {
            List<HeaderCommon> results = new();
            string json;
            HeaderCommon? hc;
            List<string> files = GetFiles(headerCommon, "*.json");
            foreach (string file in files)
            {
                json = File.ReadAllText(file);
                hc = JsonSerializer.Deserialize<HeaderCommon>(json);
                if (hc is null)
                    continue;
                results.Add(hc);
            }
            result = new()
            {
                Results = results.ToArray(),
                TotalRows = results.Count,
            };
        }
        return result;

    }

    Result<HeaderCommon[]> IExportRepository.GetLogistics(HeaderCommon headerCommon)
    {
        Result<HeaderCommon[]>? result;
        if (!string.IsNullOrEmpty(_MockRoot))
        {
            string json = File.ReadAllText(Path.Combine(string.Concat(AppContext.BaseDirectory, _MockRoot), $"{_RepositoryName}-{nameof(IExportRepository.GetLogistics)}.json"));
            result = JsonSerializer.Deserialize<Result<HeaderCommon[]>>(json);
            if (result is null)
                throw new NullReferenceException(nameof(result));
        }
        else
        {
            List<HeaderCommon> results = new();
            string json;
            HeaderCommon? hc;
            List<string> files = GetFiles(headerCommon, "*.json");
            foreach (string file in files)
            {
                json = File.ReadAllText(file);
                hc = JsonSerializer.Deserialize<HeaderCommon>(json);
                if (hc is null)
                    continue;
                results.Add(hc);
            }
            result = new()
            {
                Results = results.ToArray(),
                TotalRows = results.Count,
            };
        }
        return result;
    }

    string IExportRepository.GetProcessDataStandardFormat(HeaderCommon headerCommon)
    {
        string result;
        if (!string.IsNullOrEmpty(_MockRoot))
            result = File.ReadAllText(Path.Combine(string.Concat(AppContext.BaseDirectory, _MockRoot), $"{_RepositoryName}-{nameof(IExportRepository.GetProcessDataStandardFormat)}.pdsf"));
        else
        {
            List<string> files = GetFiles(headerCommon, "*.pdsf");
            if (files.Count != 1)
                result = string.Empty;
            else
                result = File.ReadAllText(files.First());
        }
        return result;
    }

}