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

namespace PostFundManagement.Api.Endpoints.Projects;

[ApiVersionTarget(1)]
public class CreateActivityEndpoint : IEndpoint
{
    public record CreateActivityRequest(long? MilestoneId, string Category, decimal Amount, string Title, string Description, DateTime? PerformedAt);

    public void Map(IEndpointRouteBuilder builder)
    {
        builder.MapPost("api/projects/{projectId:long}/activities", async (long projectId, CreateActivityRequest 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 == projectId, cancellationToken))
                return Results.BadRequest($"Project with ID {projectId} does not exist.");

            if (request.MilestoneId.HasValue)
                if (!await context.Milestones.AnyAsync(m => m.Id == request.MilestoneId.Value, cancellationToken))
                    return Results.BadRequest($"Milestone with ID {request.MilestoneId.Value} does not exist.");

            var activity = new Domain.Entities.Activity
            {
                ProjectId = projectId,
                MilestoneId = request.MilestoneId,
                Category = request.Category,
                Amount = request.Amount,
                Title = request.Title,
                Description = request.Description,
                PerformedAt = request.PerformedAt,
                Status = ApprovalStatus.Pending,
                CreatedBy = userId,
                CreatedAt = DateTime.UtcNow
            };

            context.Activities.Add(activity);

            return await context.SaveChangesAsync(cancellationToken) > 0
                ? Results.Created($"api/projects/{projectId}/activities/{activity.Id}", activity)
                : Results.BadRequest("Failed to create activity");
        })
        .RequireAuthorization()
        .WithDescription("Add a new activity under project (M04)")
        .WithName(typeof(CreateActivityEndpoint).ToEndpointName())
        .MapToApiVersion(new ApiVersion(1))
        .Produces<Domain.Entities.Activity>(StatusCodes.Status201Created)
        .Produces(StatusCodes.Status400BadRequest)
        .Produces(StatusCodes.Status401Unauthorized)
        .WithTags(EndpointTags.Projects);
    }
}