using System.Diagnostics.CodeAnalysis;
using System.Text.Json.Serialization;
using Microsoft.AspNetCore.Diagnostics;
using Microsoft.EntityFrameworkCore;
using Novelly.Api.Activity;
using Novelly.Api.Agent;
using Novelly.Api.Beats;
using Novelly.Api.Chapters;
using Novelly.Api.Characters;
using Novelly.Api.Common;
using Novelly.Api.Data;
using Novelly.Api.Genres;
using Novelly.Api.Imports;
using Novelly.Api.Locations;
using Novelly.Api.Novels;
using Novelly.Api.Questions;
using Novelly.Api.Tags;
using Novelly.Api.Trash;
using Novelly.Api.Users;
using Serilog;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddSerilog((services, config) => config
    .ReadFrom.Configuration(builder.Configuration)
    .ReadFrom.Services(services)
    .WriteTo.Console(outputTemplate: "[{Timestamp:HH:mm:ss} {Level:u3}] {SourceContext}: {Message:lj}{NewLine}{Exception}"));

builder.AddServiceDefaults();
builder.Services.AddNovelly(builder.Configuration);
builder.Services.AddOpenApi();
builder.Services.AddProblemDetails();

builder.Services.ConfigureHttpJsonOptions(options =>
    options.SerializerOptions.Converters.Add(new JsonStringEnumConverter()));

var corsOrigins = builder.Configuration.GetSection("Cors:Origins").Get<string[]>()
    ?? ["http://localhost:5173"];

builder.Services.AddCors(options => options.AddDefaultPolicy(policy => policy
    .WithOrigins(corsOrigins)
    .AllowAnyHeader()
    .AllowAnyMethod()
    .AllowCredentials()));

var migrateOnly = args.Contains("--migrate-only");

var app = builder.Build();

using (var scope = app.Services.CreateScope())
{
    var db = scope.ServiceProvider.GetRequiredService<NovelDbContext>();

    try
    {
        await db.Database.MigrateAsync();
    }
    catch (Exception ex)
    {
        app.Logger.LogCritical(ex, "Database migration failed on startup");
        Environment.Exit(1);
    }

    if (migrateOnly)
    {
        app.Logger.LogInformation("Migration complete, exiting ({MigrateOnlyFlag})", "--migrate-only");
        Environment.Exit(0);
    }

    await ServiceUser.EnsureSeededAsync(db, builder.Configuration[ServiceApiKeyAuthenticationHandler.ConfigurationKey], app.Logger);
    await ActivityBackfill.RunAsync(db, app.Logger);

    var importRoot = builder.Configuration.GetSection(ImportOptions.SectionName)[nameof(ImportOptions.RootPath)];
    if (!string.IsNullOrWhiteSpace(importRoot))
    {
        Directory.CreateDirectory(importRoot);
    }
}

app.UseSerilogRequestLogging();

app.UseExceptionHandler(handler => handler.Run(async context =>
{
    var exception = context.Features.Get<IExceptionHandlerFeature>()?.Error;

    var (status, title) = exception switch
    {
        AgentNotConfiguredException => (StatusCodes.Status503ServiceUnavailable, "Agent unavailable"),
        NotAuthorizedException => (StatusCodes.Status403Forbidden, "Forbidden"),
        ArgumentException or InvalidOperationException => (StatusCodes.Status400BadRequest, "Invalid request"),
        _ => (StatusCodes.Status500InternalServerError, "Unexpected error")
    };

    app.Logger.Log(
        status == StatusCodes.Status500InternalServerError ? LogLevel.Error : LogLevel.Warning,
        exception,
        "Handled {StatusCode} on {Path}: {Title}", status, context.Request.Path, title);

    await Results
        .Problem(title: title, detail: exception?.Message, statusCode: status)
        .ExecuteAsync(context);
}));

app.UseCors();

app.UseAuthentication();
app.UseAuthorization();

if (app.Environment.IsDevelopment())
{
    app.MapOpenApi();
}

app.MapDefaultEndpoints();

app.MapGet("/api/health", () => Results.Ok(new { status = "ok" })).WithTags("Health").AllowAnonymous();
app.MapUiSettingsEndpoints();

app.MapUserEndpoints();
app.MapNovelMemberEndpoints();

app.MapNovelEndpoints()
   .MapCharacterEndpoints()
   .MapChapterEndpoints()
   .MapBeatEndpoints()
   .MapTagEndpoints()
   .MapLocationEndpoints()
   .MapGenreEndpoints()
   .MapOpenQuestionEndpoints()
   .MapAgentEndpoints()
   .MapImportEndpoints()
   .MapActivityEndpoints()
   .MapTrashEndpoints();

app.Run();

[ExcludeFromCodeCoverage]
public partial class Program;