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 CreateProjectEndpoint : IEndpoint
{
    public record CreateProjectRequest(long ProgrammeId, string Name, string Description, IndustrySector Sector, ProjectType ProjectType);

    public void Map(IEndpointRouteBuilder builder)
    {
        builder.MapPost("api/projects", async (CreateProjectRequest 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.Programmes.AnyAsync(p => p.Id == request.ProgrammeId, cancellationToken))
                return Results.BadRequest($"Programme with ID {request.ProgrammeId} does not exist.");

            var project = new Domain.Entities.Project
            {
                ProgrammeId = request.ProgrammeId,
                Name = request.Name,
                Description = request.Description,
                Sector = request.Sector,
                ProjectType = request.ProjectType,
                Status = ApprovalStatus.Pending,
                CreatedBy = userId,
                CreatedAt = DateTime.UtcNow
            };

            context.Projects.Add(project);

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