package research_runtime_test

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

	researchadapter "git.cin.su/m/Assistant/adapters/research"
	"git.cin.su/m/Assistant/contracts/epistemics"
)

func TestSearchConnectorReturnsBoundedImmutableEvidence(t *testing.T) {
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "text/html")
		_, _ = w.Write([]byte(`<a class="result__a">Verified title</a><a class="result__snippet">Observed source excerpt</a>`))
	}))
	defer server.Close()
	request := epistemics.WebSearchRequest{Plan: epistemics.ResearchPlan{ID: "plan", Question: "verified source", SourceClasses: []string{"web-search"}, FreshnessPolicy: "current"}, PropositionKey: "question-1", Query: "verified source"}
	connector := researchadapter.SearchConnector{EndpointTemplate: server.URL + "?q=%s", AllowedHosts: map[string]struct{}{"127.0.0.1": {}}, Client: server.Client(), MaxResults: 3}
	// The production connector requires HTTPS. The test server is HTTPS too;
	// use its host as the allowlisted value and preserve the same transport.
	candidates, err := connector.Collect(context.Background(), request, 10)
	if err != nil {
		t.Fatalf("collect search evidence: %v", err)
	}
	if len(candidates) != 1 || candidates[0].Statement != "Verified title — Observed source excerpt" {
		t.Fatalf("unexpected candidates: %+v", candidates)
	}
	if candidates[0].Evidence != epistemics.EvidenceObserved || candidates[0].Snapshot.ContentDigest == "" || candidates[0].Excerpt.Text == "" {
		t.Fatalf("candidate lost evidence chain: %+v", candidates[0])
	}
}

func TestSearchConnectorRejectsUnallowlistedEndpoint(t *testing.T) {
	request := epistemics.WebSearchRequest{Plan: epistemics.ResearchPlan{ID: "plan", Question: "q", SourceClasses: []string{"web-search"}, FreshnessPolicy: "current"}, Query: "q"}
	_, err := (researchadapter.SearchConnector{EndpointTemplate: "https://example.invalid/?q=%s"}).Collect(context.Background(), request, 10)
	if err != researchadapter.ErrSearchRejected {
		t.Fatalf("expected allowlist rejection, got %v", err)
	}
}

func TestSearchConnectorParsesConfiguredBingStyleResults(t *testing.T) {
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, _ = w.Write([]byte(`<li class="b_algo"><h2><a href="https://source.example">Source title</a></h2><p>Current source excerpt</p></li>`))
	}))
	defer server.Close()
	request := epistemics.WebSearchRequest{Plan: epistemics.ResearchPlan{ID: "plan", Question: "q", SourceClasses: []string{"web-search"}, FreshnessPolicy: "current"}, PropositionKey: "p", Query: "q"}
	connector := researchadapter.SearchConnector{EndpointTemplate: server.URL + "?q=%s", AllowedHosts: map[string]struct{}{"127.0.0.1": {}}, Client: server.Client(), MaxResults: 3}
	candidates, err := connector.Collect(context.Background(), request, 10)
	if err != nil || len(candidates) != 1 || candidates[0].Statement != "Source title — Current source excerpt" {
		t.Fatalf("unexpected Bing-style evidence: candidates=%+v err=%v", candidates, err)
	}
}

func TestSearchConnectorDropsIrrelevantResults(t *testing.T) {
	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, _ = w.Write([]byte(`<li class="b_algo"><h2><a href="https://source.example">Викисловарь</a></h2><p>Статья о грамматике</p></li>`))
	}))
	defer server.Close()
	request := epistemics.WebSearchRequest{Plan: epistemics.ResearchPlan{ID: "plan", Question: "какая погода в Киеве", SourceClasses: []string{"web-search"}, FreshnessPolicy: "current"}, PropositionKey: "p", Query: "какая погода в Киеве"}
	connector := researchadapter.SearchConnector{EndpointTemplate: server.URL + "?q=%s", AllowedHosts: map[string]struct{}{"127.0.0.1": {}}, Client: server.Client(), MaxResults: 3}
	candidates, err := connector.Collect(context.Background(), request, 10)
	if err != nil {
		t.Fatalf("collect search evidence: %v", err)
	}
	if len(candidates) != 0 {
		t.Fatalf("irrelevant result was retained: %+v", candidates)
	}
}