using System.Data.SqlClient;
using Dapper;
using Microsoft.Extensions.Logging;
using Newtonsoft.Json;
using Npgsql;
using ProjectGSM.Entities;
using ProjectGSM.Query;
using JsonSerializer = System.Text.Json.JsonSerializer;

namespace ProjectGSM.Repositories.Implementations;

public class CaseRepository : ICaseRepository
{
    private readonly IConnectionString _connectionString;
    private readonly ILogger<CaseRepository> _logger;

    public CaseRepository(IConnectionString connectionString,
        ILogger<CaseRepository> logger)
    {
        _connectionString = connectionString;
        _logger = logger;
    }

    public IEnumerable<Case> ReadCases(DateTime? dateTo = null)
    {
        _logger.LogInformation("Получение всех объектов");
        try
        {
            var builder = new QueryBuilder();
            if (dateTo.HasValue)
            {
                builder.AddCondition("cases.CreatedAt <= @dateTo");
            }

            using var connection = new
                NpgsqlConnection(_connectionString.ConnectionString);
            
            var querySelect =
                "SELECT cases.*, courts.name as CourtName, clients.name as ClientName, ca.caseid as CaseId, a.name as AdvocateName " +
                "FROM cases " +
                "LEFT JOIN courts on courts.Id = cases.courtid " +
                "LEFT JOIN clients on clients.Id = cases.clientid " +
                "INNER JOIN case_advocates ca ON ca.caseid = cases.Id LEFT JOIN advocates a on a.Id = ca.advocateid " +
                $"{builder.Build()}";
            // $"{builder.Build()}";
            var casesDict = new Dictionary<int, List<CaseAdvocate>>();
            ;
            var cases = connection.Query<Case, CaseAdvocate, Case>(querySelect,
                (caseEntity, caseAdvocate) =>
                {
                    if (!casesDict.TryGetValue(caseEntity.Id, out var ca))
                    {
                        ca = new List<CaseAdvocate>();
                        casesDict.Add(caseEntity.Id, ca);
                    }

                    ca.Add(caseAdvocate);
                    return caseEntity;
                }, splitOn: "CaseId", param: new { dateTo, });

            _logger.LogDebug("Полученные объекты: {json}",
                JsonConvert.SerializeObject(cases));
            return casesDict.Select(x =>
            {
                var caseEntity = cases.First(y => y.Id == x.Key);
                caseEntity.SetAdvocates(x.Value);
                return caseEntity;
            }).ToArray();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при чтении объектов");
            throw;
        }
    }

    public Case ReadCaseById(int id)
    {
        _logger.LogInformation("Получение объекта по идентификатору");
        _logger.LogDebug("Объект: {id}", id);
        try
        {
            using var connection = new
                NpgsqlConnection(_connectionString.ConnectionString);
            var querySelect = @"SELECT * FROM cases WHERE Id=@id";
            var caseE = connection.QueryFirst<Case>(querySelect, new { id });
            _logger.LogDebug("Найденный объект: {json}",
                JsonSerializer.Serialize(caseE));
            return caseE;
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при поиске объекта");
            throw;
        }
    }

    public void CreateCase(Case caseEntity)
    {
        _logger.LogInformation("Добавление объекта");
        _logger.LogDebug("Объект: {json}",
            JsonSerializer.Serialize(caseEntity));
        try
        {
            using var connection = new NpgsqlConnection(_connectionString.ConnectionString);
            connection.Open();
            using var transaction = connection.BeginTransaction();
            var queryInsert =
                @"INSERT INTO Cases (typeappeal, Payment, Price, victoryprice, Verdict, courtid, clientid, Description, createdat)
                VALUES (@TypeAppeal, @Payment, @Price, @VictoryPrice, @Verdict, @CourtId, @ClientId, @Description, @CreatedAt);
SELECT MAX(Id) FROM cases;";
            var caseId =
                connection.QueryFirst<int>(queryInsert, caseEntity, transaction);
            var querySubInsert = @"
                INSERT INTO case_advocates (caseid, advocateid, post, createdat)
                VALUES (@CaseId, @AdvocateId, @Post, @CreatedAt)";
            foreach (var elem in caseEntity.Advocates)
            {
                connection.Execute(querySubInsert, new
                {
                    caseId, elem.AdvocateId, elem.Post, elem.CreatedAt
                }, transaction);
            }

            transaction.Commit();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при добавлении объекта");
            throw;
        }
    }

    public void DeleteCase(int id)
    {
        _logger.LogInformation("Удаление объекта");
        _logger.LogDebug("Объект: {id}", id);
        try
        {
            using var connection = new
                NpgsqlConnection(_connectionString.ConnectionString);
            var queryDelete = @"DELETE FROM cases WHERE id = @Id;";
            connection.Execute(queryDelete, new { Id = id });
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Ошибка при удалении объекта");
            throw;
        }
    }
}