using Microsoft.EntityFrameworkCore;
using public_valetax.Data;
using public_valetax.Models;
using public_valetax.DTOs;

namespace public_valetax.Repositories
{
    public class JournalRepository(ApplicationDbContext _context) : IJournalRepository
    {
        public async Task<JournalEntry> CreateJournalEntryAsync(
            long eventId,
            string exceptionType,
            string message,
            string? queryParameters = null,
            string? bodyParameters = null,
            string? stackTrace = null)
        {
            var journalEntry = new JournalEntry
            {
                EventId = eventId,
                Timestamp = DateTime.UtcNow,
                ExceptionType = exceptionType,
                Message = message,
                QueryParameters = queryParameters,
                BodyParameters = bodyParameters,
                StackTrace = stackTrace
            };

            _context.JournalEntries.Add(journalEntry);
            await _context.SaveChangesAsync();
            return journalEntry;
        }

        public async Task<MJournal?> GetJournalEntryAsync(long id)
        {
            var journalEntry = await _context.JournalEntries.FindAsync(id);
            
            if (journalEntry == null)
            {
                return null;
                }

            return new MJournal
            {
                Id = journalEntry.Id,
                EventId = journalEntry.EventId,
                Text = journalEntry.Message,
                CreatedAt = journalEntry.Timestamp
            };
        }

        public async Task<MRange_MJournalInfo> GetJournalEntriesRangeAsync(int skip, int take, VJournalFilter filter)
        {
            var query = _context.JournalEntries.AsQueryable();

            // Apply filters if provided
            if (filter.From.HasValue)
            {
                query = query.Where(j => j.Timestamp >= filter.From.Value);
            }

            if (filter.To.HasValue)
            {
                query = query.Where(j => j.Timestamp <= filter.To.Value);
            }

            if (!string.IsNullOrEmpty(filter.Search))
            {
                query = query.Where(j => j.Message.Contains(filter.Search) || j.ExceptionType.Contains(filter.Search));
            }

            // Get total count before pagination
            var totalCount = await query.CountAsync();

            // Apply pagination
            var journalEntries = await query
                .OrderByDescending(j => j.Timestamp)
                .Skip(skip)
                .Take(take)
                .Select(j => new MJournalInfo
                {
                    Id = j.Id,
                    EventId = j.EventId,
                    CreatedAt = j.Timestamp
                })
                .ToListAsync();

            return new MRange_MJournalInfo
            {
                Skip = skip,
                Count = totalCount,
                Items = journalEntries
            };
        }
    }
}