using line_gestao_api.Models;
using line_gestao_api.Services;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;

namespace line_gestao_api.Data;

public class AppDbContext : IdentityDbContext<ApplicationUser, IdentityRole<Guid>, Guid>
{
    private readonly ITenantProvider _tenantProvider;

    public AppDbContext(DbContextOptions<AppDbContext> options, ITenantProvider tenantProvider) : base(options)
    {
        _tenantProvider = tenantProvider;
    }

    public DbSet<Tenant> Tenants => Set<Tenant>();

    // ✅ tabela para espelhar a planilha (GERAL)
    public DbSet<MobileLine> MobileLines => Set<MobileLine>();

    // ✅ tabela para espelhar a aba MUREG
    public DbSet<MuregLine> MuregLines => Set<MuregLine>();

    // ✅ tabela para espelhar o FATURAMENTO (PF/PJ)
    public DbSet<BillingClient> BillingClients => Set<BillingClient>();

    // ✅ tabela DADOS DOS USUÁRIOS
    public DbSet<UserData> UserDatas => Set<UserData>();

    // ✅ tabela VIGÊNCIA
    public DbSet<VigenciaLine> VigenciaLines => Set<VigenciaLine>();

    // ✅ tabela TROCA DE NÚMERO
    public DbSet<TrocaNumeroLine> TrocaNumeroLines => Set<TrocaNumeroLine>();

    // ✅ tabela CHIPS VIRGENS
    public DbSet<ChipVirgemLine> ChipVirgemLines => Set<ChipVirgemLine>();

    // ✅ tabela CONTROLE DE RECEBIDOS
    public DbSet<ControleRecebidoLine> ControleRecebidoLines => Set<ControleRecebidoLine>();

    // ✅ tabela NOTIFICAÇÕES
    public DbSet<Notification> Notifications => Set<Notification>();

    // ✅ tabela RESUMO
    public DbSet<ResumoMacrophonyPlan> ResumoMacrophonyPlans => Set<ResumoMacrophonyPlan>();
    public DbSet<ResumoMacrophonyTotal> ResumoMacrophonyTotals => Set<ResumoMacrophonyTotal>();
    public DbSet<ResumoVivoLineResumo> ResumoVivoLineResumos => Set<ResumoVivoLineResumo>();
    public DbSet<ResumoVivoLineTotal> ResumoVivoLineTotals => Set<ResumoVivoLineTotal>();
    public DbSet<ResumoClienteEspecial> ResumoClienteEspeciais => Set<ResumoClienteEspecial>();
    public DbSet<ResumoPlanoContratoResumo> ResumoPlanoContratoResumos => Set<ResumoPlanoContratoResumo>();
    public DbSet<ResumoPlanoContratoTotal> ResumoPlanoContratoTotals => Set<ResumoPlanoContratoTotal>();
    public DbSet<ResumoLineTotais> ResumoLineTotais => Set<ResumoLineTotais>();
    public DbSet<ResumoReservaLine> ResumoReservaLines => Set<ResumoReservaLine>();
    public DbSet<ResumoReservaTotal> ResumoReservaTotals => Set<ResumoReservaTotal>();

    // ✅ tabela PARCELAMENTOS
    public DbSet<ParcelamentoLine> ParcelamentoLines => Set<ParcelamentoLine>();
    public DbSet<ParcelamentoMonthValue> ParcelamentoMonthValues => Set<ParcelamentoMonthValue>();

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        base.OnModelCreating(modelBuilder);

        // =========================
        // ✅ USER (Identity)
        // =========================
        modelBuilder.Entity<ApplicationUser>(e =>
        {
            e.Property(x => x.Name).HasMaxLength(120);
            e.HasIndex(x => new { x.TenantId, x.NormalizedEmail })
                .IsUnique();
        });

        // =========================
        // ✅ GERAL (MobileLine)
        // =========================
        modelBuilder.Entity<MobileLine>(e =>
        {
            // Mantém UNIQUE por Linha por tenant (se Linha puder ser null no banco, Postgres aceita múltiplos nulls)
            e.HasIndex(x => new { x.TenantId, x.Linha }).IsUnique();

            // performance
            e.HasIndex(x => x.Chip);
            e.HasIndex(x => x.Cliente);
            e.HasIndex(x => x.Usuario);
            e.HasIndex(x => x.Skil);
            e.HasIndex(x => x.Status);
        });

        // =========================
        // ✅ MUREG (FK para MobileLines)
        // =========================
        modelBuilder.Entity<MuregLine>(e =>
        {
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.ICCID);
            e.HasIndex(x => x.LinhaAntiga);
            e.HasIndex(x => x.LinhaNova);
            e.HasIndex(x => x.TenantId);

            // FK + index
            e.HasIndex(x => x.MobileLineId);

            e.HasOne(x => x.MobileLine)
                .WithMany(m => m.Muregs)
                .HasForeignKey(x => x.MobileLineId)
                .OnDelete(DeleteBehavior.Restrict);
        });

        // =========================
        // ✅ FATURAMENTO (BillingClient)
        // =========================
        modelBuilder.Entity<BillingClient>(e =>
        {
            // ⚠️ só mantenha se seu banco realmente usa esse nome
            e.ToTable("billing_clients");

            e.HasKey(x => x.Id);

            e.Property(x => x.Tipo).HasMaxLength(2);
            e.Property(x => x.Cliente).HasMaxLength(255);

            e.HasIndex(x => x.Tipo);
            e.HasIndex(x => x.Cliente);
            e.HasIndex(x => new { x.Tipo, x.Cliente });
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.TenantId);
        });

        // =========================
        // ✅ DADOS DOS USUÁRIOS (UserData)
        // ✅ (SEM "Nome" pq não existe no model)
        // =========================
        modelBuilder.Entity<UserData>(e =>
        {
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.Cliente);
            e.HasIndex(x => x.Linha);
            e.HasIndex(x => x.Cpf);
            e.HasIndex(x => x.Email);
            e.HasIndex(x => x.TenantId);
        });

        // =========================
        // ✅ VIGÊNCIA
        // =========================
        modelBuilder.Entity<VigenciaLine>(e =>
        {
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.Cliente);
            e.HasIndex(x => x.Linha);
            e.HasIndex(x => x.DtTerminoFidelizacao);
            e.HasIndex(x => x.TenantId);
        });

        // =========================
        // ✅ TROCA NÚMERO
        // =========================
        modelBuilder.Entity<TrocaNumeroLine>(e =>
        {
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.LinhaAntiga);
            e.HasIndex(x => x.LinhaNova);
            e.HasIndex(x => x.ICCID);
            e.HasIndex(x => x.DataTroca);
            e.HasIndex(x => x.TenantId);
        });

        // =========================
        // ✅ CHIPS VIRGENS
        // =========================
        modelBuilder.Entity<ChipVirgemLine>(e =>
        {
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.NumeroDoChip);
            e.HasIndex(x => x.TenantId);
        });

        // =========================
        // ✅ CONTROLE DE RECEBIDOS
        // =========================
        modelBuilder.Entity<ControleRecebidoLine>(e =>
        {
            e.HasIndex(x => x.Ano);
            e.HasIndex(x => x.Item);
            e.HasIndex(x => x.NotaFiscal);
            e.HasIndex(x => x.Chip);
            e.HasIndex(x => x.Serial);
            e.HasIndex(x => x.NumeroDaLinha);
            e.HasIndex(x => x.DataDaNf);
            e.HasIndex(x => x.DataDoRecebimento);
            e.HasIndex(x => x.TenantId);
        });

        // =========================
        // ✅ NOTIFICAÇÕES
        // =========================
        modelBuilder.Entity<Notification>(e =>
        {
            e.HasIndex(x => x.DedupKey).IsUnique();
            e.HasIndex(x => x.UserId);
            e.HasIndex(x => x.Cliente);
            e.HasIndex(x => x.Lida);
            e.HasIndex(x => x.Data);
            e.HasIndex(x => x.VigenciaLineId);
            e.HasIndex(x => x.TenantId);

            e.HasOne(x => x.User)
                .WithMany()
                .HasForeignKey(x => x.UserId)
                .OnDelete(DeleteBehavior.Restrict);

            e.HasOne(x => x.VigenciaLine)
                .WithMany()
                .HasForeignKey(x => x.VigenciaLineId)
                .OnDelete(DeleteBehavior.Restrict);
        });

        // =========================
        // ✅ PARCELAMENTOS
        // =========================
        modelBuilder.Entity<ParcelamentoLine>(e =>
        {
            e.Property(x => x.Linha).HasMaxLength(32);
            e.Property(x => x.Cliente).HasMaxLength(120);
            e.Property(x => x.QtParcelas).HasMaxLength(32);
            e.Property(x => x.ValorCheio).HasPrecision(18, 2);
            e.Property(x => x.Desconto).HasPrecision(18, 2);
            e.Property(x => x.ValorComDesconto).HasPrecision(18, 2);

            e.HasIndex(x => new { x.AnoRef, x.Item }).IsUnique();
            e.HasIndex(x => x.Linha);
            e.HasIndex(x => x.TenantId);
        });

        modelBuilder.Entity<ParcelamentoMonthValue>(e =>
        {
            e.Property(x => x.Valor).HasPrecision(18, 2);
            e.HasIndex(x => new { x.ParcelamentoLineId, x.Competencia }).IsUnique();
            e.HasIndex(x => x.TenantId);

            e.HasOne(x => x.ParcelamentoLine)
                .WithMany(x => x.MonthValues)
                .HasForeignKey(x => x.ParcelamentoLineId)
                .OnDelete(DeleteBehavior.Cascade);
        });

        modelBuilder.Entity<MobileLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<MuregLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<BillingClient>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<UserData>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<VigenciaLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<TrocaNumeroLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ChipVirgemLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ControleRecebidoLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<Notification>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoMacrophonyPlan>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoMacrophonyTotal>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoVivoLineResumo>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoVivoLineTotal>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoClienteEspecial>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoPlanoContratoResumo>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoPlanoContratoTotal>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoLineTotais>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoReservaLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ResumoReservaTotal>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ParcelamentoLine>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ParcelamentoMonthValue>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
        modelBuilder.Entity<ApplicationUser>().HasQueryFilter(x => _tenantProvider.TenantId != null && x.TenantId == _tenantProvider.TenantId);
    }

    public override int SaveChanges()
    {
        ApplyTenantIds();
        return base.SaveChanges();
    }

    public override Task<int> SaveChangesAsync(CancellationToken cancellationToken = default)
    {
        ApplyTenantIds();
        return base.SaveChangesAsync(cancellationToken);
    }

    private void ApplyTenantIds()
    {
        if (_tenantProvider.TenantId == null)
        {
            return;
        }

        var tenantId = _tenantProvider.TenantId.Value;
        foreach (var entry in ChangeTracker.Entries<ITenantEntity>().Where(e => e.State == EntityState.Added))
        {
            if (entry.Entity.TenantId == Guid.Empty)
            {
                entry.Entity.TenantId = tenantId;
            }
        }
    }
}