using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Domain.Entities.Developers;
using Microsoft.EntityFrameworkCore;
using SharedKernel.Results;

namespace Application.Features.Api.Developers.Profile.UpsertProfile;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result<Response>>
{
    public async Task<Result<Response>> Handle(Command request, CancellationToken ct)
    {
        if (string.IsNullOrWhiteSpace(request.CompanyName))
        {
            return Result.Failure<Response>(Error.Problem("Developer.CompanyNameRequired", "회사명은 필수입니다."));
        }
        if (string.IsNullOrWhiteSpace(request.BusinessNumber))
        {
            return Result.Failure<Response>(Error.Problem("Developer.BusinessNumberRequired", "사업자번호는 필수입니다."));
        }
        if (string.IsNullOrWhiteSpace(request.CeoName))
        {
            return Result.Failure<Response>(Error.Problem("Developer.CeoNameRequired", "대표자명은 필수입니다."));
        }
        if (string.IsNullOrWhiteSpace(request.ContactName))
        {
            return Result.Failure<Response>(Error.Problem("Developer.ContactNameRequired", "담당자명은 필수입니다."));
        }
        if (string.IsNullOrWhiteSpace(request.ContactPhone))
        {
            return Result.Failure<Response>(Error.Problem("Developer.ContactPhoneRequired", "담당자 휴대폰은 필수입니다."));
        }

        var existing = await db.Developer
            .AsTracking()
            .FirstOrDefaultAsync(c => c.MemberID == request.MemberID, ct);

        if (existing is null)
        {
            var newDev = Developer.Create(
                request.MemberID,
                request.CompanyName.Trim(),
                request.BusinessNumber.Trim(),
                request.CeoName.Trim(),
                request.ContactName.Trim(),
                request.ContactPhone.Trim()
            );
            await db.Developer.AddAsync(newDev, ct);
            await db.SaveChangesAsync(ct);
            return Result.Success(new Response(newDev.ID, true));
        }

        existing.UpdateCompanyInfo(
            request.CompanyName.Trim(),
            request.BusinessNumber.Trim(),
            request.CeoName.Trim(),
            request.ContactName.Trim(),
            request.ContactPhone.Trim()
        );
        await db.SaveChangesAsync(ct);
        return Result.Success(new Response(existing.ID, false));
    }
}