using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using StellaOps.Notifier.Worker.StormBreaker;

namespace StellaOps.Notifier.WebService.Endpoints;

/// <summary>
/// REST API endpoints for storm breaker operations.
/// </summary>
public static class StormBreakerEndpoints
{
    /// <summary>
    /// Maps storm breaker API endpoints.
    /// </summary>
    public static RouteGroupBuilder MapStormBreakerEndpoints(this IEndpointRouteBuilder endpoints)
    {
        var group = endpoints.MapGroup("/api/v2/storm-breaker")
            .WithTags("Storm Breaker")
            .WithOpenApi();

        // List active storms for tenant
        group.MapGet("/storms", async (
            HttpContext context,
            IStormBreaker stormBreaker,
            CancellationToken cancellationToken) =>
        {
            var tenantId = context.Request.Headers["X-Tenant-Id"].FirstOrDefault() ?? "default";

            var storms = await stormBreaker.GetActiveStormsAsync(tenantId, cancellationToken);

            return Results.Ok(new
            {
                tenantId,
                activeStorms = storms.Select(s => new
                {
                    s.TenantId,
                    s.StormKey,
                    s.StartedAt,
                    eventCount = s.EventIds.Count,
                    s.SuppressedCount,
                    s.LastActivityAt,
                    s.IsActive
                }).ToList(),
                count = storms.Count
            });
        })
        .WithName("ListActiveStorms")
        .WithSummary("Lists all active notification storms for a tenant");

        // Get specific storm state
        group.MapGet("/storms/{stormKey}", async (
            string stormKey,
            HttpContext context,
            IStormBreaker stormBreaker,
            CancellationToken cancellationToken) =>
        {
            var tenantId = context.Request.Headers["X-Tenant-Id"].FirstOrDefault() ?? "default";

            var state = await stormBreaker.GetStateAsync(tenantId, stormKey, cancellationToken);
            if (state is null)
            {
                return Results.NotFound(new { error = $"No storm found with key '{stormKey}'" });
            }

            return Results.Ok(new
            {
                state.TenantId,
                state.StormKey,
                state.StartedAt,
                eventCount = state.EventIds.Count,
                state.SuppressedCount,
                state.LastActivityAt,
                state.LastSummaryAt,
                state.IsActive,
                sampleEventIds = state.EventIds.Take(10).ToList()
            });
        })
        .WithName("GetStormState")
        .WithSummary("Gets the current state of a specific storm");

        // Generate storm summary
        group.MapPost("/storms/{stormKey}/summary", async (
            string stormKey,
            HttpContext context,
            IStormBreaker stormBreaker,
            CancellationToken cancellationToken) =>
        {
            var tenantId = context.Request.Headers["X-Tenant-Id"].FirstOrDefault() ?? "default";

            var summary = await stormBreaker.GenerateSummaryAsync(tenantId, stormKey, cancellationToken);
            if (summary is null)
            {
                return Results.NotFound(new { error = $"No storm found with key '{stormKey}'" });
            }

            return Results.Ok(summary);
        })
        .WithName("GenerateStormSummary")
        .WithSummary("Generates a summary for an active storm");

        // Clear storm state
        group.MapDelete("/storms/{stormKey}", async (
            string stormKey,
            HttpContext context,
            IStormBreaker stormBreaker,
            CancellationToken cancellationToken) =>
        {
            var tenantId = context.Request.Headers["X-Tenant-Id"].FirstOrDefault() ?? "default";

            await stormBreaker.ClearAsync(tenantId, stormKey, cancellationToken);

            return Results.Ok(new { message = $"Storm '{stormKey}' cleared successfully" });
        })
        .WithName("ClearStorm")
        .WithSummary("Clears a storm state manually");

        return group;
    }
}