using FluentValidation;
using GreenHome.AI.DeepSeek;
using GreenHome.Application;
using GreenHome.Infrastructure;
using GreenHome.Infrastructure.Data;
using GreenHome.Sms.Ippanel;
using GreenHome.VoiceCall.Avanak;
using Microsoft.AspNetCore.StaticFiles;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.FileProviders;
using Scalar.AspNetCore;

var builder = WebApplication.CreateBuilder(args);

// ============================================================
// 1. Service Registration
// ============================================================

ConfigureCoreServices(builder);
ConfigureCors(builder);
ConfigureExternalServices(builder);

var app = builder.Build();

// ============================================================
// 2. Pipeline Configuration
// ============================================================

ApplyMigrations(app);
ConfigureMiddleware(app);
ConfigureStaticFiles(app);
app.MapControllers();

// SPA fallback: serve index.html for non-API routes (client-side routing)
app.MapFallbackToFile("index.html");

app.Run();

// ============================================================
// Service Registration Methods
// ============================================================

void ConfigureCoreServices(WebApplicationBuilder builder)
{
    builder.Services.AddControllers();
    builder.Services.AddEndpointsApiExplorer();
    builder.Services.AddOpenApi();

    // Caching & HTTP client factory (used by WeatherController proxy with tiered caching)
    builder.Services.AddMemoryCache();
    builder.Services.AddHttpClient();

    builder.Services.AddAutoMapper(typeof(GreenHome.Application.MappingProfile));
    builder.Services.AddValidatorsFromAssemblyContaining<GreenHome.Application.DeviceDtoValidator>();

    builder.Services.AddInfrastructure(builder.Configuration);
}

void ConfigureCors(WebApplicationBuilder builder)
{
    const string CorsPolicy = "DefaultCors";

    builder.Services.AddCors(options =>
    {
        options.AddPolicy(CorsPolicy, policy =>
        {
            if (builder.Environment.IsDevelopment())
            {
                policy
                    .AllowAnyOrigin()
                    .AllowAnyHeader()
                    .AllowAnyMethod();
            }
            else
            {
                policy
                    .WithOrigins(
                        "http://green.nabaksoft.ir",
                        "https://green.nabaksoft.ir",
                        "http://gh1.nabaksoft.ir",
                        "https://gh1.nabaksoft.ir"
                    )
                    .AllowAnyHeader()
                    .AllowAnyMethod()
                    .AllowCredentials();
            }
        });
    });
}

void ConfigureExternalServices(WebApplicationBuilder builder)
{
    builder.Services.AddIppanelSms(builder.Configuration);
    builder.Services.AddAvanakVoiceCall(builder.Configuration);
    builder.Services.AddDeepSeek(builder.Configuration);
}

// ============================================================
// Middleware & Pipeline Methods
// ============================================================

void ApplyMigrations(WebApplication app)
{
    using var scope = app.Services.CreateScope();
    var services = scope.ServiceProvider;

    try
    {
        var context = services.GetRequiredService<GreenHomeDbContext>();
        context.Database.Migrate();
    }
    catch (Exception ex)
    {
        var logger = services.GetRequiredService<ILogger<Program>>();
        logger.LogError(ex, "An error occurred while migrating the database.");
    }
}

void ConfigureMiddleware(WebApplication app)
{
    app.MapOpenApi();
    app.MapScalarApiReference();

    if (!app.Environment.IsDevelopment())
    {
        app.UseHttpsRedirection();
    }

    app.UseCors("DefaultCors");
    app.UseAuthorization();
}

void ConfigureStaticFiles(WebApplication app)
{
    var provider = new FileExtensionContentTypeProvider();
    provider.Mappings[".amr"] = "audio/amr";
    provider.Mappings[".apk"] = "application/vnd.android.package-archive";

    // Serve existing My_StaticFiles folder
    app.UseStaticFiles(new StaticFileOptions
    {
        FileProvider = new PhysicalFileProvider(
            Path.Combine(app.Environment.ContentRootPath, "My_StaticFiles")),
        RequestPath = "/My_StaticFiles",
        ContentTypeProvider = provider
    });

    // Serve new files folder for APK and other downloads
    app.UseStaticFiles(new StaticFileOptions
    {
        FileProvider = new PhysicalFileProvider(
            Path.Combine(app.Environment.ContentRootPath, "files")),
        RequestPath = "/files",
        ContentTypeProvider = provider
    });

    // Serve the SPA from wwwroot (Vite build output)
    app.UseDefaultFiles();
    app.UseStaticFiles();
}