package engines

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

	"github.com/ashie/gosearch/internal/contracts"
)

func TestBraveEngine_GatingAndHeader(t *testing.T) {
	wantToken := "letmein"
	wantAPIKey := "api-key"

	transport := roundTripperFunc(func(r *http.Request) (*http.Response, error) {
		if r.Header.Get("X-Subscription-Token") != wantAPIKey {
			t.Fatalf("missing/incorrect X-Subscription-Token header: got %q", r.Header.Get("X-Subscription-Token"))
		}
		if r.URL.Host != "api.search.brave.com" {
			t.Fatalf("unexpected host: %s", r.URL.Host)
		}
		if r.URL.Path != "/res/v1/web/search" {
			t.Fatalf("unexpected path: %s", r.URL.Path)
		}
		// basic query assertions
		q := r.URL.Query().Get("q")
		if q != "hugo" {
			t.Fatalf("unexpected q: %q", q)
		}

		body := `{
		  "web": {
		    "results": [
		      {"url":"https://example.com/a","title":"A","description":"B","age":"2024-06-03T00:00:00Z","thumbnail":{"src":"x"}}
		    ]
		  }
		}`
		return httpResponse(http.StatusOK, body, "application/json"), nil
	})

	client := &http.Client{Transport: transport}
	engine := &BraveEngine{
		client:          client,
		apiKey:          wantAPIKey,
		accessGateToken: wantToken,
		resultsPerPage: 20,
	}

	// Wrong token => no upstream call / unresponsive engine.
	{
		resp, err := engine.Search(context.Background(), contracts.SearchRequest{
			Query:       "hugo",
			Pageno:      1,
			Safesearch:  0,
			Language:    "en",
			AccessToken: "wrong",
		})
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if len(resp.Results) != 0 {
			t.Fatalf("expected no results on unauthorized, got %d", len(resp.Results))
		}
		if len(resp.UnresponsiveEngines) != 1 {
			t.Fatalf("expected 1 unresponsive engine entry, got %v", resp.UnresponsiveEngines)
		}
	}

	// Correct token => upstream call.
	{
		resp, err := engine.Search(context.Background(), contracts.SearchRequest{
			Query:       "hugo",
			Pageno:      1,
			Safesearch:  0,
			Language:    "en",
			AccessToken: wantToken,
		})
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if len(resp.Results) != 1 {
			t.Fatalf("expected 1 result, got %d", len(resp.Results))
		}
		if resp.Results[0].Title != "A" {
			t.Fatalf("unexpected title: %q", resp.Results[0].Title)
		}
		if resp.Results[0].URL == nil || *resp.Results[0].URL != "https://example.com/a" {
			t.Fatalf("unexpected url: %v", resp.Results[0].URL)
		}
	}
}