using System;
using Paca.Mobile.Core;
using Xunit;

namespace Paca.Tests.Core;

public class BatteryPowerGovernorGateTests
{
    [Fact]
    public void Gate249_BatteryPowerGovernor_DetectsLowBattery_AndEntersLowPowerMode()
    {
        var governor = new BatteryPowerGovernor();

        // 15% battery, discharging
        governor.UpdateBatteryState(batteryLevelPercent: 15, isCharging: false);

        Assert.True(governor.IsLowPowerModeActive);
        Assert.Equal(1, governor.MaxRecommendedDownloads);
    }

    [Fact]
    public void Gate250_BatteryPowerGovernor_AcPowerConnected_RestoresHighPerformance()
    {
        var governor = new BatteryPowerGovernor();

        // 15% battery, but charging on AC
        governor.UpdateBatteryState(batteryLevelPercent: 15, isCharging: true);

        Assert.False(governor.IsLowPowerModeActive);
        Assert.True(governor.MaxRecommendedDownloads >= 4);
    }

    [Fact]
    public void Gate251_BatteryPowerGovernor_ConfigurableThreshold()
    {
        var governor = new BatteryPowerGovernor(lowBatteryThresholdPercent: 30);

        // 25% battery with 30% threshold -> low power active
        governor.UpdateBatteryState(batteryLevelPercent: 25, isCharging: false);
        Assert.True(governor.IsLowPowerModeActive);

        // 35% battery with 30% threshold -> normal
        governor.UpdateBatteryState(batteryLevelPercent: 35, isCharging: false);
        Assert.False(governor.IsLowPowerModeActive);
    }

    [Fact]
    public void Gate252_BatteryPowerGovernor_AppliesPlayerRenderPolicy()
    {
        var governor = new BatteryPowerGovernor();

        // Low power
        governor.UpdateBatteryState(batteryLevelPercent: 10, isCharging: false);
        var lowPolicy = governor.GetRenderPolicy();
        Assert.False(lowPolicy.EnableGlassmorphismBlur);
        Assert.Equal(30, lowPolicy.TargetFramerate);

        // High power
        governor.UpdateBatteryState(batteryLevelPercent: 90, isCharging: false);
        var highPolicy = governor.GetRenderPolicy();
        Assert.True(highPolicy.EnableGlassmorphismBlur);
        Assert.Equal(60, highPolicy.TargetFramerate);
    }
}