using Core.Entities;

namespace WebApp.Services;

public class EventOccurrenceService : IEventOccurrenceService
{
    public Task<IEnumerable<EventOccurrence>> GetEventOccurrencesAsync()
    {
        // Mock data for demonstration purposes
        // This will be replaced with database-backed implementation later
        var mockOccurrences = new List<EventOccurrence>
        {
            new EventOccurrence
            {
                Name = "Opening Ceremony",
                Date = "March 15",
                Time = "8:00 a.m.",
                StartTime = new DateTime(2026, 3, 15, 8, 0, 0),
                EndTime = new DateTime(2026, 3, 15, 9, 0, 0),
                Location = "Main Auditorium"
            },
            new EventOccurrence
            {
                Name = "Sign-up",
                Date = "March 15",
                Time = "9:30 a.m.",
                StartTime = new DateTime(2026, 3, 15, 9, 30, 0),
                EndTime = new DateTime(2026, 3, 15, 11, 0, 0),
                Location = "Registration Hall"
            },
            new EventOccurrence
            {
                Name = "Judging",
                Date = "March 15",
                Time = "1:00 p.m.",
                StartTime = new DateTime(2026, 3, 15, 13, 0, 0),
                EndTime = new DateTime(2026, 3, 15, 17, 0, 0),
                Location = "Exhibition Hall"
            },
            new EventOccurrence
            {
                Name = "Submit",
                Date = "March 16",
                Time = "8:00 a.m.",
                StartTime = new DateTime(2026, 3, 16, 8, 0, 0),
                EndTime = new DateTime(2026, 3, 16, 10, 0, 0),
                Location = "Submission Desk"
            },
            new EventOccurrence
            {
                Name = "Competition 1",
                Date = "March 16",
                Time = "10:30 a.m.",
                StartTime = new DateTime(2026, 3, 16, 10, 30, 0),
                EndTime = new DateTime(2026, 3, 16, 12, 0, 0),
                Location = "Competition Hall"
            },
            new EventOccurrence
            {
                Name = "Competition 2",
                Date = "March 16",
                Time = "10:30 a.m.",
                StartTime = new DateTime(2026, 3, 16, 11, 30, 0),
                EndTime = new DateTime(2026, 3, 16, 13, 0, 0),
                Location = "Competition Hall"
            },
            new EventOccurrence
            {
                Name = "Awards Ceremony",
                Date = "March 17",
                Time = "2:00 p.m.",
                StartTime = new DateTime(2026, 3, 17, 14, 0, 0),
                EndTime = new DateTime(2026, 3, 17, 16, 0, 0),
                Location = "Main Auditorium"
            }
        };

        return Task.FromResult<IEnumerable<EventOccurrence>>(mockOccurrences);
    }

    public Task<IEnumerable<EventOccurrence>> GetEventOccurrencesForDateRangeAsync(DateTime start, DateTime end)
    {
        return GetEventOccurrencesAsync().ContinueWith(task =>
        {
            var allOccurrences = task.Result;
            return allOccurrences.Where(eo => 
                eo.StartTime.Date >= start.Date && 
                eo.StartTime.Date <= end.Date);
        });
    }
}