using System;
using System.Linq;
using Microsoft.AspNetCore.Cors.Infrastructure;
using Microsoft.Extensions.Configuration;
using OpenTelemetry.Metrics;
using OpenTelemetry.Resources;
using OpenTelemetry.Trace;
using Serilog;
using TakeoutSaaS.Application.Messaging.Extensions;
using TakeoutSaaS.Application.Sms.Extensions;
using TakeoutSaaS.Application.Storage.Extensions;
using TakeoutSaaS.Module.Messaging.Extensions;
using TakeoutSaaS.Module.Sms.Extensions;
using TakeoutSaaS.Module.Storage.Extensions;
using TakeoutSaaS.Module.Tenancy.Extensions;
using TakeoutSaaS.Shared.Web.Extensions;
using TakeoutSaaS.Shared.Web.Swagger;

var builder = WebApplication.CreateBuilder(args);
const string logTemplate = "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} {Level:u3}] [TraceId:{TraceId}] [SpanId:{SpanId}] [Service:{Service}] {SourceContext} {Message:lj}{NewLine}{Exception}";

builder.Host.UseSerilog((_, _, configuration) =>
{
    configuration
        .Enrich.FromLogContext()
        .Enrich.WithProperty("Service", "MiniApi")
        .WriteTo.Console(outputTemplate: logTemplate)
        .WriteTo.File(
            "logs/mini-api-.log",
            rollingInterval: RollingInterval.Day,
            retainedFileCountLimit: 7,
            shared: true,
            outputTemplate: logTemplate);
});

builder.Services.AddSharedWebCore();
builder.Services.AddSharedSwagger(options =>
{
    options.Title = "外卖SaaS - 小程序端";
    options.Description = "小程序 API 文档";
    options.EnableAuthorization = true;
});
builder.Services.AddTenantResolution(builder.Configuration);
builder.Services.AddStorageModule(builder.Configuration);
builder.Services.AddStorageApplication();
builder.Services.AddSmsModule(builder.Configuration);
builder.Services.AddSmsApplication(builder.Configuration);
builder.Services.AddMessagingModule(builder.Configuration);
builder.Services.AddMessagingApplication();
builder.Services.AddHealthChecks();
var otelSection = builder.Configuration.GetSection("Otel");
var otelEndpoint = otelSection.GetValue<string>("Endpoint");
var useConsoleExporter = otelSection.GetValue<bool?>("UseConsoleExporter") ?? builder.Environment.IsDevelopment();
builder.Services.AddOpenTelemetry()
    .ConfigureResource(resource => resource.AddService(
        serviceName: "TakeoutSaaS.MiniApi",
        serviceVersion: "1.0.0",
        serviceInstanceId: Environment.MachineName))
    .WithTracing(tracing =>
    {
        tracing
            .SetSampler(new ParentBasedSampler(new AlwaysOnSampler()))
            .AddAspNetCoreInstrumentation()
            .AddHttpClientInstrumentation()
            .AddEntityFrameworkCoreInstrumentation();

        if (!string.IsNullOrWhiteSpace(otelEndpoint))
        {
            tracing.AddOtlpExporter(exporter =>
            {
                exporter.Endpoint = new Uri(otelEndpoint);
            });
        }

        if (useConsoleExporter)
        {
            tracing.AddConsoleExporter();
        }
    })
    .WithMetrics(metrics =>
    {
        metrics
            .AddAspNetCoreInstrumentation()
            .AddHttpClientInstrumentation()
            .AddRuntimeInstrumentation()
            .AddPrometheusExporter();

        if (!string.IsNullOrWhiteSpace(otelEndpoint))
        {
            metrics.AddOtlpExporter(exporter =>
            {
                exporter.Endpoint = new Uri(otelEndpoint);
            });
        }

        if (useConsoleExporter)
        {
            metrics.AddConsoleExporter();
        }
    });

var miniOrigins = ResolveCorsOrigins(builder.Configuration, "Cors:Mini");
builder.Services.AddCors(options =>
{
    options.AddPolicy("MiniApiCors", policy =>
    {
        ConfigureCorsPolicy(policy, miniOrigins);
    });
});

var app = builder.Build();

app.UseCors("MiniApiCors");
app.UseTenantResolution();
app.UseSharedWebCore();
app.UseSharedSwagger();

app.MapHealthChecks("/healthz");
app.MapPrometheusScrapingEndpoint();
app.MapControllers();
app.Run();

static string[] ResolveCorsOrigins(IConfiguration configuration, string sectionKey)
{
    var origins = configuration.GetSection(sectionKey).Get<string[]>();
    return origins?
        .Where(origin => !string.IsNullOrWhiteSpace(origin))
        .Distinct(StringComparer.OrdinalIgnoreCase)
        .ToArray() ?? [];
}

static void ConfigureCorsPolicy(CorsPolicyBuilder policy, string[] origins)
{
    if (origins.Length == 0)
    {
        policy.AllowAnyOrigin();
    }
    else
    {
        policy.WithOrigins(origins)
            .AllowCredentials();
    }

    policy
        .AllowAnyHeader()
        .AllowAnyMethod();
}