using ClosedXML.Excel;
using line_gestao_api.Data;
using line_gestao_api.Dtos;
using line_gestao_api.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace line_gestao_api.Controllers;

[ApiController]
[Route("api/notifications")]
[Authorize]
public class NotificationsController : ControllerBase
{
    private readonly AppDbContext _db;

    public NotificationsController(AppDbContext db)
    {
        _db = db;
    }

    [HttpGet]
    [HttpGet("/notifications")]
    public async Task<ActionResult<List<NotificationDto>>> GetNotifications()
    {
        var query = _db.Notifications.AsNoTracking();

        var items = await query
            .OrderByDescending(n => n.Data)
            .Select(n => new NotificationDto
            {
                Id = n.Id,
                Tipo = n.Tipo,
                Titulo = n.Titulo,
                Mensagem = n.Mensagem,
                Data = n.Data,
                ReferenciaData = n.ReferenciaData,
                DiasParaVencer = n.DiasParaVencer,
                Lida = n.Lida,
                LidaEm = n.LidaEm,
                VigenciaLineId = n.VigenciaLineId,
                Cliente = n.Cliente,
                Linha = n.Linha
            })
            .ToListAsync();

        return Ok(items);
    }

    [HttpPatch("{id:guid}/read")]
    [HttpPatch("/notifications/{id:guid}/read")]
    public async Task<IActionResult> MarkAsRead(Guid id)
    {
        var notification = await _db.Notifications
            .FirstOrDefaultAsync(n => n.Id == id);

        if (notification is null)
        {
            return NotFound();
        }

        if (!notification.Lida)
        {
            notification.Lida = true;
            notification.LidaEm = DateTime.UtcNow;
            await _db.SaveChangesAsync();
        }

        return NoContent();
    }

    [HttpPatch("read-all")]
    [HttpPatch("/notifications/read-all")]
    public async Task<IActionResult> MarkAllAsRead([FromQuery] string? filter)
    {
        var utcNow = DateTime.UtcNow;
        var query = ApplyFilter(_db.Notifications, filter)
            .Where(n => !n.Lida);

        await query.ExecuteUpdateAsync(updates => updates
            .SetProperty(n => n.Lida, true)
            .SetProperty(n => n.LidaEm, utcNow));

        return NoContent();
    }

    [HttpGet("export")]
    [HttpGet("/notifications/export")]
    public async Task<IActionResult> ExportNotifications([FromQuery] string? filter)
    {
        var query = ApplyFilter(_db.Notifications.AsNoTracking(), filter);

        var rows = await (
            from notification in query
            join vigencia in _db.VigenciaLines.AsNoTracking()
                on notification.VigenciaLineId equals vigencia.Id into vigencias
            from vigencia in vigencias.DefaultIfEmpty()
            orderby notification.ReferenciaData descending, notification.Data descending
            select new NotificationExportRow(
                vigencia == null ? null : vigencia.Item,
                vigencia == null ? null : vigencia.Conta,
                vigencia == null ? null : vigencia.Linha,
                vigencia == null ? null : vigencia.Cliente,
                vigencia == null ? null : vigencia.Usuario,
                vigencia == null ? null : vigencia.PlanoContrato,
                vigencia == null ? null : vigencia.DtEfetivacaoServico,
                vigencia == null ? null : vigencia.DtTerminoFidelizacao,
                vigencia == null ? null : vigencia.Total,
                notification.Tipo))
            .ToListAsync();

        using var workbook = new XLWorkbook();
        var worksheet = workbook.Worksheets.Add("Notificacoes");

        var headers = new[]
        {
            "Item (ID)",
            "Conta",
            "Linha",
            "Cliente",
            "Usuário",
            "Plano Contrato",
            "DT. DE EFETIVAÇÃO DO SERVIÇO",
            "DT. DE TÉRMINO DA FIDELIZAÇÃO",
            "TOTAL",
            "Status"
        };

        for (var i = 0; i < headers.Length; i++)
        {
            worksheet.Cell(1, i + 1).Value = headers[i];
        }

        var headerRange = worksheet.Range(1, 1, 1, headers.Length);
        headerRange.Style.Font.Bold = true;
        headerRange.Style.Fill.BackgroundColor = XLColor.LightGray;
        headerRange.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;

        for (var i = 0; i < rows.Count; i++)
        {
            var row = rows[i];
            var rowIndex = i + 2;
            worksheet.Cell(rowIndex, 1).Value = row.Item;
            worksheet.Cell(rowIndex, 2).Value = row.Conta ?? string.Empty;
            worksheet.Cell(rowIndex, 3).Value = row.Linha ?? string.Empty;
            worksheet.Cell(rowIndex, 4).Value = row.Cliente ?? string.Empty;
            worksheet.Cell(rowIndex, 5).Value = row.Usuario ?? string.Empty;
            worksheet.Cell(rowIndex, 6).Value = row.PlanoContrato ?? string.Empty;
            worksheet.Cell(rowIndex, 7).Value = row.DtEfetivacaoServico;
            worksheet.Cell(rowIndex, 8).Value = row.DtTerminoFidelizacao;
            worksheet.Cell(rowIndex, 9).Value = row.Total;
            worksheet.Cell(rowIndex, 10).Value = row.Tipo;
        }

        worksheet.Column(1).Width = 12;
        worksheet.Column(2).Width = 18;
        worksheet.Column(3).Width = 18;
        worksheet.Column(4).Width = 22;
        worksheet.Column(5).Width = 22;
        worksheet.Column(6).Width = 20;
        worksheet.Column(7).Width = 22;
        worksheet.Column(8).Width = 24;
        worksheet.Column(9).Width = 14;
        worksheet.Column(10).Width = 14;

        worksheet.Column(7).Style.DateFormat.Format = "dd/MM/yyyy";
        worksheet.Column(8).Style.DateFormat.Format = "dd/MM/yyyy";
        worksheet.Column(9).Style.NumberFormat.Format = "#,##0.00";

        worksheet.Columns().AdjustToContents();

        using var stream = new MemoryStream();
        workbook.SaveAs(stream);
        stream.Position = 0;

        var fileName = $"notificacoes-{DateTime.UtcNow:yyyyMMddHHmmss}.xlsx";
        return File(
            stream.ToArray(),
            "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
            fileName);
    }

    private static IQueryable<Notification> ApplyFilter(IQueryable<Notification> query, string? filter)
    {
        var normalized = filter?.Trim().ToLowerInvariant();
        return normalized switch
        {
            "a-vencer" or "avencer" => query.Where(n => n.Tipo == "AVencer"),
            "vencidas" or "vencido" => query.Where(n => n.Tipo == "Vencido"),
            _ => query
        };
    }

    private sealed record NotificationExportRow(
        int? Item,
        string? Conta,
        string? Linha,
        string? Cliente,
        string? Usuario,
        string? PlanoContrato,
        DateTime? DtEfetivacaoServico,
        DateTime? DtTerminoFidelizacao,
        decimal? Total,
        string Tipo);

}