package checker

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"

	sdk "git.happydns.org/checker-sdk-go/checker"
)

const disconnectFakeFeed = `{
  "categories": {
    "Advertising": [
      {
        "Evil Corp": {
          "https://evilcorp.com": ["tracker.com", "sub.example.org"]
        }
      }
    ],
    "Analytics": [
      {
        "Metrics Inc": {
          "https://metrics.io": ["analytics.net"]
        }
      }
    ]
  }
}`

func newDisconnectTestSource(srv *httptest.Server) *disconnectSource {
	return &disconnectSource{
		cache: newFeedCache(time.Hour, disconnectFetch(srv.URL)),
	}
}

func TestDisconnectSource_Listed(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte(disconnectFakeFeed))
	}))
	defer srv.Close()

	s := newDisconnectTestSource(srv)
	r := s.Query(context.Background(), "tracker.com", "tracker.com", sdk.CheckerOptions{"enable_disconnect": true})[0]

	if !r.Enabled || r.Error != "" {
		t.Fatalf("expected enabled with no error, got %+v", r)
	}
	if len(r.Evidence) == 0 {
		t.Fatalf("expected evidence, got none")
	}
	found := false
	for _, e := range r.Evidence {
		if e.Value == "Advertising" {
			found = true
			if e.Extra["company"] != "Evil Corp" {
				t.Errorf("expected company 'Evil Corp', got %q", e.Extra["company"])
			}
		}
	}
	if !found {
		t.Errorf("expected Advertising evidence, got %+v", r.Evidence)
	}
	if listed, sev := s.Evaluate(r); !listed || sev != SeverityWarn {
		t.Errorf("expected (true, warn), got (%v, %q)", listed, sev)
	}
}

func TestDisconnectSource_SubdomainInFeed(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte(disconnectFakeFeed))
	}))
	defer srv.Close()

	// Feed has "sub.example.org"; querying registered domain "example.org" should match.
	s := newDisconnectTestSource(srv)
	r := s.Query(context.Background(), "example.org", "example.org", sdk.CheckerOptions{"enable_disconnect": true})[0]

	if !r.Enabled || r.Error != "" {
		t.Fatalf("expected enabled with no error, got %+v", r)
	}
	if len(r.Evidence) == 0 {
		t.Errorf("expected subdomain match evidence, got none")
	}
}

func TestDisconnectSource_NotListed(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write([]byte(disconnectFakeFeed))
	}))
	defer srv.Close()

	s := newDisconnectTestSource(srv)
	r := s.Query(context.Background(), "clean.example.com", "clean.example.com", sdk.CheckerOptions{"enable_disconnect": true})[0]

	if !r.Enabled || r.Error != "" {
		t.Fatalf("expected enabled with no error, got %+v", r)
	}
	if len(r.Evidence) != 0 {
		t.Errorf("expected no evidence for clean domain, got %+v", r.Evidence)
	}
	if listed, _ := s.Evaluate(r); listed {
		t.Errorf("expected not listed for clean domain")
	}
}

func TestDisconnectSource_Disabled(t *testing.T) {
	s := &disconnectSource{cache: newFeedCache(time.Hour, disconnectFetch("http://nope"))}
	r := s.Query(context.Background(), "tracker.com", "tracker.com", sdk.CheckerOptions{"enable_disconnect": false})[0]
	if r.Enabled {
		t.Errorf("expected disabled result, got %+v", r)
	}
}

func TestDisconnectSource_HTTPError(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		w.WriteHeader(http.StatusInternalServerError)
	}))
	defer srv.Close()

	s := newDisconnectTestSource(srv)
	r := s.Query(context.Background(), "tracker.com", "tracker.com", sdk.CheckerOptions{"enable_disconnect": true})[0]
	if r.Error == "" {
		t.Errorf("expected error on HTTP 500, got empty error")
	}
}