using System;
using System.Collections.Generic;
using Paca.Core;
using Xunit;

namespace Paca.Tests.Core;

public class BandwidthScheduleProfileGateTests
{
    [Fact]
    public void Gate313_BandwidthScheduleProfile_DefinesWorkAndNightProfiles()
    {
        var workProfile = new BandwidthProfile("WorkHours", MaxBytesPerSecond: 5 * 1024 * 1024, MaxConcurrentTasks: 2);
        var nightProfile = new BandwidthProfile("NightUncapped", MaxBytesPerSecond: 0, MaxConcurrentTasks: 8);

        Assert.Equal(5 * 1024 * 1024, workProfile.MaxBytesPerSecond);
        Assert.Equal(2, workProfile.MaxConcurrentTasks);
        Assert.True(nightProfile.IsUnlimited);
        Assert.Equal(8, nightProfile.MaxConcurrentTasks);
    }

    [Fact]
    public void Gate314_BandwidthScheduleProfile_SelectsWorkProfile_DuringDaytime()
    {
        var workProfile = new BandwidthProfile("WorkHours", 5 * 1024 * 1024, 2);
        var defaultProfile = new BandwidthProfile("Default", 0, 4);

        var config = new BandwidthScheduleConfig
        {
            IsEnabled = true,
            DefaultProfile = defaultProfile,
            Rules = new List<BandwidthTimeRule>
            {
                new(StartTime: TimeSpan.FromHours(9), EndTime: TimeSpan.FromHours(18), Profile: workProfile)
            }
        };

        var dayTime = new DateTime(2026, 9, 4, 14, 30, 0); // 14:30
        var active = BandwidthScheduleProfileEngine.GetActiveProfile(dayTime, config);

        Assert.Equal("WorkHours", active.ProfileName);
        Assert.Equal(5 * 1024 * 1024, active.MaxBytesPerSecond);
    }

    [Fact]
    public void Gate315_BandwidthScheduleProfile_SelectsNightProfile_Overnight()
    {
        var nightProfile = new BandwidthProfile("NightUncapped", 0, 8);
        var defaultProfile = new BandwidthProfile("Default", 10 * 1024 * 1024, 3);

        var config = new BandwidthScheduleConfig
        {
            IsEnabled = true,
            DefaultProfile = defaultProfile,
            Rules = new List<BandwidthTimeRule>
            {
                new(StartTime: TimeSpan.FromHours(23), EndTime: TimeSpan.FromHours(7), Profile: nightProfile)
            }
        };

        var overnight = new DateTime(2026, 9, 5, 3, 15, 0); // 03:15
        var active = BandwidthScheduleProfileEngine.GetActiveProfile(overnight, config);

        Assert.Equal("NightUncapped", active.ProfileName);
        Assert.True(active.IsUnlimited);
        Assert.Equal(8, active.MaxConcurrentTasks);
    }

    [Fact]
    public void Gate316_BandwidthScheduleProfile_FallsBackToDefault_WhenDisabledOrOutOfRange()
    {
        var workProfile = new BandwidthProfile("WorkHours", 2 * 1024 * 1024, 1);
        var defaultProfile = new BandwidthProfile("Default", 0, 4);

        var config = new BandwidthScheduleConfig
        {
            IsEnabled = false, // Disabled
            DefaultProfile = defaultProfile,
            Rules = new List<BandwidthTimeRule>
            {
                new(StartTime: TimeSpan.FromHours(9), EndTime: TimeSpan.FromHours(18), Profile: workProfile)
            }
        };

        var dayTime = new DateTime(2026, 9, 4, 14, 0, 0);
        var active = BandwidthScheduleProfileEngine.GetActiveProfile(dayTime, config);

        Assert.Equal("Default", active.ProfileName);
        Assert.True(active.IsUnlimited);
    }
}