using Fitness_core_BE.Models;
using Microsoft.EntityFrameworkCore;

namespace Fitness_core_BE.Services
{
    public sealed record JobRunRecord(
        string JobName, Guid ClientId, DateTime RunAtUtc, string Status,
        int SubscriptionsRenewed, string? ErrorMessage);

    // Persisted in CentralDbContext.JobRunLogs. Callers pass in whichever CentralDbContext they
    // already have open -- background jobs get theirs from TenantSchemaIterator (central is one
    // fixed database regardless of tenant, so any instance points at the same schema), the admin
    // controller gets a normal DI-injected one since it runs inside a real HTTP request.
    public interface IJobRunHistory
    {
        Task RecordAsync(CentralDbContext central, JobRunRecord record, CancellationToken ct = default);
        Task<IReadOnlyList<JobRunRecord>> GetRecentAsync(CentralDbContext central, string jobName, int take, CancellationToken ct = default);
    }

    public sealed class DbJobRunHistory : IJobRunHistory
    {
        public async Task RecordAsync(CentralDbContext central, JobRunRecord record, CancellationToken ct = default)
        {
            central.JobRunLogs.Add(new JobRunLog
            {
                JobRunLogId = Guid.NewGuid(),
                JobName = record.JobName,
                FKClientId = record.ClientId,
                RunAtUtc = record.RunAtUtc,
                Status = record.Status,
                SubscriptionsRenewed = record.SubscriptionsRenewed,
                ErrorMessage = record.ErrorMessage
            });
            await central.SaveChangesAsync(ct);
        }

        public async Task<IReadOnlyList<JobRunRecord>> GetRecentAsync(
            CentralDbContext central, string jobName, int take, CancellationToken ct = default)
        {
            return await central.JobRunLogs
                .AsNoTracking()
                .Where(r => r.JobName == jobName)
                .OrderByDescending(r => r.RunAtUtc)
                .Take(take)
                .Select(r => new JobRunRecord(r.JobName, r.FKClientId, r.RunAtUtc, r.Status, r.SubscriptionsRenewed, r.ErrorMessage))
                .ToListAsync(ct);
        }
    }
}