using System.Collections.Generic;
using Paca.Browser.Extensions;
using Xunit;

namespace Paca.Tests.Browser;

public class DeclarativeNetRequestPriorityTests
{
    [Fact]
    public void HigherPriority_AllowRule_Overrides_LowerPriority_BlockRule()
    {
        var engine = new DeclarativeNetRequestEngine();

        // 1. Static Rule: Priority 1 - Block doubleclick.net
        engine.RegisterStaticRules("ext1", new List<DnrRule>
        {
            new DnrRule
            {
                Id = 1,
                Priority = 1,
                Action = new DnrRuleAction { Type = "block" },
                Condition = new DnrRuleCondition { UrlFilter = "||doubleclick.net^" }
            }
        });

        // 2. Dynamic Rule: Priority 2 - Allow doubleclick.net/allowed
        engine.UpdateDynamicRules("ext1", null, new List<DnrRule>
        {
            new DnrRule
            {
                Id = 2,
                Priority = 2,
                Action = new DnrRuleAction { Type = "allow" },
                Condition = new DnrRuleCondition { UrlFilter = "||doubleclick.net/allowed^" }
            }
        });

        // 일반 픽셀은 Block
        var blockDecision = engine.EvaluateRequest("https://ad.doubleclick.net/pixel", method: "GET", resourceType: "xmlhttprequest");
        Assert.Equal(DnrRuleActionType.Block, blockDecision.ActionType);
        Assert.Equal(1, blockDecision.MatchedRuleId);

        // 허용 경로는 Priority 2인 Allow 룰이 Block을 오버라이드
        var allowDecision = engine.EvaluateRequest("https://ad.doubleclick.net/allowed/test", method: "GET", resourceType: "xmlhttprequest");
        Assert.Equal(DnrRuleActionType.Allow, allowDecision.ActionType);
        Assert.Equal(2, allowDecision.MatchedRuleId);
    }

    [Fact]
    public void SessionRules_HavePrecedence_Over_StaticRules()
    {
        var engine = new DeclarativeNetRequestEngine();

        // Static: Block example.com
        engine.RegisterStaticRules("ext1", new List<DnrRule>
        {
            new DnrRule
            {
                Id = 10,
                Priority = 10,
                Action = new DnrRuleAction { Type = "block" },
                Condition = new DnrRuleCondition { UrlFilter = "||example.com^" }
            }
        });

        // Session: AllowAllRequests for example.com (동일 priority에서도 Session이 Static을 압도)
        engine.UpdateSessionRules("ext1", null, new List<DnrRule>
        {
            new DnrRule
            {
                Id = 20,
                Priority = 10,
                Action = new DnrRuleAction { Type = "allowAllRequests" },
                Condition = new DnrRuleCondition { UrlFilter = "||example.com^" }
            }
        });

        var decision = engine.EvaluateRequest("https://example.com/page", method: "GET", resourceType: "main_frame");
        Assert.Equal(DnrRuleActionType.AllowAllRequests, decision.ActionType);
        Assert.Equal(20, decision.MatchedRuleId);
    }
}