using System;
using System.IO;
using Paca.Browser.Content;
using Paca.Browser.Extensions;
using Paca.Core.Net;
using Xunit;

namespace Paca.Tests.Core;

public class SecurityAndRateLimitingExtremeRedTests
{
    // ==========================================
    // 1. ExtensionCspValidator
    // ==========================================

    [Fact]
    public void ExtensionCspValidator_Validate_ManifestV3_UnsafeInlineInScriptSrc_ReturnsInvalid()
    {
        var result = ExtensionCspValidator.Validate("script-src 'self' 'unsafe-inline'; object-src 'self';", manifestVersion: 3);
        Assert.False(result.IsValid);
        Assert.NotEmpty(result.Violations);
        Assert.Contains(result.Violations, v => v.Contains("unsafe-inline", StringComparison.OrdinalIgnoreCase));
    }

    [Theory]
    [InlineData("script-src 'self' data:;")]
    [InlineData("script-src 'self' blob:;")]
    public void ExtensionCspValidator_Validate_ManifestV3_DataOrBlobInScriptSrc_ReturnsInvalid(string csp)
    {
        var result = ExtensionCspValidator.Validate(csp, manifestVersion: 3);
        Assert.False(result.IsValid);
        Assert.NotEmpty(result.Violations);
    }

    [Theory]
    [InlineData(";; ; ;")]
    [InlineData(" ; ; ")]
    public void ExtensionCspValidator_Validate_EmptySemicolons_FallsBackToDefaultCsp(string csp)
    {
        var result = ExtensionCspValidator.Validate(csp, manifestVersion: 3);
        Assert.True(result.IsValid);
        Assert.Equal(ExtensionCspValidator.DefaultManifestV3Csp, result.NormalizedCsp);
    }

    // ==========================================
    // 2. SiteAutoMutePolicy
    // ==========================================

    [Fact]
    public void SiteAutoMutePolicy_AddAutoMutePattern_WildcardAsterisk_MutesAllSites()
    {
        var policy = new SiteAutoMutePolicy();
        policy.AddAutoMutePattern("*");

        Assert.True(policy.IsAutoMute("https://youtube.com/watch?v=123"));
        Assert.True(policy.IsAutoMute("https://news.naver.com"));
        Assert.True(policy.IsAutoMute("https://example.org"));
    }

    [Fact]
    public void SiteAutoMutePolicy_Save_InvalidOrReadOnlyPath_DoesNotThrowUnhandledException()
    {
        // Using an invalid directory path that cannot be created on Windows
        var policy = new SiteAutoMutePolicy("Z:\\nonexistent_drive_9999\\invalid\\mute.json");
        var ex = Record.Exception(() => policy.AddAutoMutePattern("example.com"));
        Assert.Null(ex);
    }

    // ==========================================
    // 3. HostRateLimiter
    // ==========================================

    [Theory]
    [InlineData("example.com:8080/api/v1", "example.com")]
    [InlineData("https://sub.4cdn.org/image.png", "sub.4cdn.org")]
    [InlineData("user:pass@reddit.com:443/r/funny", "reddit.com")]
    [InlineData(null, "")]
    [InlineData("   ", "")]
    public void HostRateLimiter_NormalizeHost_VariousInputs_NormalizesCleanly(string? input, string expected)
    {
        var host = HostRateLimiter.NormalizeHost(input);
        Assert.Equal(expected, host);
    }

    [Theory]
    [InlineData("i.4cdn.org", 1200)]
    [InlineData("boards.4channel.org", 1200)]
    [InlineData("v.redd.it", 800)]
    [InlineData("www.reddit.com", 800)]
    [InlineData("generic-site.com", 200)]
    public void HostRateLimiter_GetIntervalMs_RecognizesDomainPresets(string host, int expectedMs)
    {
        var interval = HostRateLimiter.GetIntervalMs(host);
        Assert.Equal(expectedMs, interval);
    }
}