using PostFundManagement.Domain;
using PostFundManagement.Domain.Abstractions;
using PostFundManagement.Domain.Api;
using PostFundManagement.Domain.Extensions;
using PostFundManagement.Infrastructure.Database;

namespace PostFundManagement.Api.Endpoints.Evidence;

[ApiVersionTarget(1)]
public class CreateIndicatorEndpoint : IEndpoint
{
    public record CreateIndicatorRequest(long ProjectId, string Name, UnitOfMeasure UnitOfMeasure, decimal BaselineAmount, decimal TargetAmount);

    public void Map(IEndpointRouteBuilder builder)
    {
        builder.MapPost("api/evidence/indicators", async (CreateIndicatorRequest request, ClaimsPrincipal principal, 
            IDbContextFactory<ApplicationDbContext> contextFactory, CancellationToken cancellationToken = default) =>
        {
            var sidClaim = principal.FindFirst("sid")?.Value ?? principal.FindFirst(ClaimTypes.Sid)?.Value;

            if (!Guid.TryParse(sidClaim, out var userId))
                return Results.BadRequest("Missing or invalid 'sid' claim.");

            using var context = await contextFactory.CreateDbContextAsync(cancellationToken);

            if (!await context.Projects.AnyAsync(p => p.Id == request.ProjectId, cancellationToken))
                return Results.BadRequest($"Project with ID {request.ProjectId} does not exist.");

            var indicator = new Domain.Entities.Indicator
            {
                ProjectId = request.ProjectId,
                Name = request.Name,
                UnitOfMeasure = request.UnitOfMeasure,
                BaselineAmount = request.BaselineAmount,
                TargetAmount = request.TargetAmount,
                ActualAmount = request.BaselineAmount,
                CreatedBy = userId,
                CreatedAt = DateTime.UtcNow
            };

            context.Indicators.Add(indicator);

            return await context.SaveChangesAsync(cancellationToken) > 0
                ? Results.Created($"api/evidence/indicators/{indicator.Id}", indicator)
                : Results.BadRequest("Failed to create indicator");
        })
        .RequireAuthorization()
        .WithDescription("Define indicators and baselines/targets (M08)")
        .WithName(typeof(CreateIndicatorEndpoint).ToEndpointName())
        .MapToApiVersion(new ApiVersion(1))
        .Produces<PostFundManagement.Domain.Entities.Indicator>(StatusCodes.Status201Created)
        .Produces(StatusCodes.Status400BadRequest)
        .Produces(StatusCodes.Status401Unauthorized)
        .WithTags(EndpointTags.Evidence);
    }
}