using JSMR.Application.Circles.Queries.Search;
using JSMR.Application.Creators.Queries.Search;
using JSMR.Application.Tags.Queries.Search;
using JSMR.Application.Users;
using JSMR.Application.VoiceWorks.Queries.Search;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Serilog;
using System.Diagnostics;
using System.Security.Claims;

namespace JSMR.Api.Startup;

public static class WebApplicationExtensions
{
    public static WebApplication UseAppPipeline(this WebApplication app, IHostEnvironment env)
    {
        app.UseCors("ui");

        if (env.IsDevelopment())
            app.MapOpenApi();

        app.UseHttpsRedirection();

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

        app.MapControllers();

        app.UseSerilogRequestLogging(opts =>
        {
            opts.MessageTemplate = "HTTP {RequestMethod} {RequestPath} responded {StatusCode} in {Elapsed:0.0000} ms";
        });

        app.Use(async (ctx, next) =>
        {
            var traceId = Activity.Current?.TraceId.ToString() ?? ctx.TraceIdentifier;
            using (Serilog.Context.LogContext.PushProperty("TraceId", traceId))
            {
                ctx.Response.Headers["x-trace-id"] = traceId;
                await next();
            }
        });

        return app;
    }

    public static void MapAppEndpoints(this WebApplication app)
    {
        app.MapGet("/health", () => Results.Ok(new { status = "ok" }));

        app.MapSearchEndpoints();
        app.MapAuthenticationEndpoints();
    }

    private static void MapSearchEndpoints(this WebApplication app)
    {
        app.MapPost("/api/circles/search", async (
            SearchCirclesRequest request,
            SearchCirclesHandler handler,
            CancellationToken ct) =>
        {
            try
            {
                var result = await handler.HandleAsync(request, ct);
                return Results.Ok(result);
            }
            catch (OperationCanceledException) when (ct.IsCancellationRequested)
            {
                return Results.StatusCode(StatusCodes.Status499ClientClosedRequest);
            }
        });

        app.MapPost("/api/voiceworks/search", async (
            SearchVoiceWorksRequest request,
            SearchVoiceWorksHandler handler,
            CancellationToken ct) =>
        {
            var result = await handler.HandleAsync(request, ct);
            return Results.Ok(result);
        });

        app.MapPost("/api/tags/search", async (
            SearchTagsRequest request,
            SearchTagsHandler handler,
            CancellationToken ct) =>
        {
            var result = await handler.HandleAsync(request, ct);
            return Results.Ok(result);
        });

        app.MapPost("/api/creators/search", async (
            SearchCreatorsRequest request,
            SearchCreatorsHandler handler,
            CancellationToken ct) =>
        {
            var result = await handler.HandleAsync(request, ct);
            return Results.Ok(result);
        });
    }

    private static void MapAuthenticationEndpoints(this WebApplication app)
    {
        app.MapPost("/auth/login", async (LoginRequest req, IUserRepository users, HttpContext http) =>
        {
            var user = await users.FindByUsernameAsync(req.Username);
            if (user is null || !user.IsActive)
                return Results.Unauthorized();

            if (!users.VerifyPassword(user, req.Password))
                return Results.Unauthorized();

            var claims = new List<Claim>
            {
                new(ClaimTypes.NameIdentifier, user.Id.ToString()),
                new(ClaimTypes.Name, user.Username),
                new(ClaimTypes.Role, user.Role ?? "User")
            };

            var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
            var principal = new ClaimsPrincipal(identity);

            await http.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, principal);
            return Results.Ok(new { ok = true });
        });

        app.MapPost("/auth/logout", async (HttpContext http) =>
        {
            await http.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
            return Results.Ok(new { ok = true });
        });

        app.MapGet("/api/me", (ClaimsPrincipal user) =>
        {
            return Results.Ok(new
            {
                name = user.Identity?.Name,
                id = user.FindFirstValue(ClaimTypes.NameIdentifier),
                role = user.FindFirstValue(ClaimTypes.Role)
            });
        }).RequireAuthorization();
    }

    public record LoginRequest(string Username, string Password);
}