using Fitness_core_BE.Exceptions;
using Fitness_core_BE.Helpers;
using Fitness_core_BE.Infra.UoW;
using Fitness_core_BE.Interfaces.Services;
using Fitness_core_BE.Models;
using Fitness_core_BE.Models.Enums;
using Microsoft.EntityFrameworkCore;

namespace Fitness_core_BE.Services
{
    // GYM's onboarding/activation flow (ClientController's "onboarding/requests" ->
    // "activation/{token}" endpoints) is a multi-gym SaaS signup wizard -- OTP checks, NIC
    // upload, a payment-method + platform-billing charge step -- built for a platform onboarding
    // many paying gym clients. Vijaya is a single, already-real club, not a SaaS signup; this
    // is the one-time "create the club" step instead, guarded so it can only ever run once
    // (before that first Client row exists) rather than being a repeatable registration path.
    public class BootstrapService : IBootstrapService
    {
        private readonly CentralDbContext _central;
        private readonly IUnitOfWork _uow;

        public BootstrapService(CentralDbContext central, IUnitOfWork uow)
        {
            _central = central;
            _uow = uow;
        }

        public async Task<object> BootstrapClub(object payload)
        {
            await _uow.BeginAsync();
            try
            {
                if (await _central.Client.AnyAsync())
                    throw new BadRequestException("The club is already set up.");

                var data = DeserializePayload.Deserialize(payload);
                if (!data.ContainsKey("userId")) throw new ArgumentException("userId is required");
                if (!data.ContainsKey("clientName")) throw new ArgumentException("clientName is required");

                var userId = Guid.Parse(data["userId"].GetString()!);
                var clientName = data["clientName"].GetString()!;

                // core-api keeps its own local mirror of user identity (see CustomerRepository/
                // StaffRepository doing the same on customer/staff creation) -- Client.FKUserId
                // has a real local FK to this table, not to auth-service's database, since the
                // two services no longer share a connection. Idempotent: harmless if a mirror
                // row already exists for this user id.
                if (!await _central.Users.AnyAsync(u => u.UserId == userId))
                {
                    _central.Users.Add(new User
                    {
                        UserId = userId,
                        Email = data.ContainsKey("clientEmail") ? data["clientEmail"].GetString() : null,
                        PhoneNumber = data.ContainsKey("clientPhone") ? data["clientPhone"].GetString() : null,
                        IsActive = true
                    });
                }

                var client = new Client
                {
                    ClientId = Guid.NewGuid(),
                    FKUserId = userId,
                    ClientName = clientName,
                    ClientPhone = data.ContainsKey("clientPhone") ? data["clientPhone"].GetString() : null,
                    ClientEmail = data.ContainsKey("clientEmail") ? data["clientEmail"].GetString() : null
                };
                _central.Client.Add(client);

                _central.ClientBusiness.Add(new ClientBusiness
                {
                    Bid = Guid.NewGuid(),
                    FKClientId = client.ClientId,
                    BusinessType = BusinessType.institute,
                    BusinessName = clientName,
                    IsActive = true
                });

                await _uow.CommitAsync();

                return new { clientId = client.ClientId, clientName = client.ClientName };
            }
            catch
            {
                await _uow.RollbackAsync();
                throw;
            }
        }
    }
}