package app

import (
	"errors"
	"fmt"
	"net/http"
	"strings"
	"testing"

	"github.com/geo-platform/tenant-api/internal/shared/config"
)

func TestBrowserFetchDomainAllowedMatchesSubdomain(t *testing.T) {
	t.Parallel()

	if !browserFetchDomainAllowed("https://mbd.baidu.com/bh/m/detail/ar_10234112381636647949", []string{"baidu.com"}) {
		t.Fatalf("expected baidu.com to allow mbd.baidu.com")
	}
	if browserFetchDomainAllowed("https://notbaidu.com/article", []string{"baidu.com"}) {
		t.Fatalf("expected baidu.com not to allow notbaidu.com")
	}
}

func TestShouldTryBrowserFetchFallbackIgnoresAllowedDomains(t *testing.T) {
	t.Parallel()

	svc := &KnowledgeService{
		cfg: knowledgeRuntimeConfig{
			BrowserFetch: config.BrowserFetchConfig{
				Enabled:        true,
				Provider:       "lightpanda",
				ServiceURL:     "http://browser-fetch:8082",
				TriggerStatus:  []int{500},
				AllowedDomains: nil,
			},
		},
	}

	err := fmt.Errorf("webpage parser failed: status=%d body=invalid link", http.StatusInternalServerError)
	if !svc.shouldTryBrowserFetchFallback("https://m.baidu.com/bh/m/detail/ar_x", err) {
		t.Fatalf("expected fallback to trigger on status=500 regardless of allowed_domains")
	}

	svc.cfg.BrowserFetch.Enabled = false
	if svc.shouldTryBrowserFetchFallback("https://m.baidu.com/bh/m/detail/ar_x", err) {
		t.Fatalf("expected fallback to be skipped when browser_fetch.enabled=false")
	}

	svc.cfg.BrowserFetch.Enabled = true
	svc.cfg.BrowserFetch.TriggerStatus = []int{502}
	if svc.shouldTryBrowserFetchFallback("https://m.baidu.com/bh/m/detail/ar_x", err) {
		t.Fatalf("expected fallback to be skipped when status not in trigger_status")
	}
}

func TestSourceFetchExhaustedErrorIsFriendly(t *testing.T) {
	t.Parallel()

	primary := fmt.Errorf("webpage parser failed: status=500 body=invalid link")
	fallback := fmt.Errorf("browser fetch timeout")
	err := sourceFetchExhaustedError{URL: "https://m.baidu.com/x", Primary: primary, Fallback: fallback}

	msg := err.Error()
	if !strings.Contains(msg, "源文章解析失败") {
		t.Fatalf("error message %q should contain friendly Chinese prompt", msg)
	}
	if strings.Contains(msg, "status=500") || strings.Contains(msg, "invalid link") {
		t.Fatalf("error message %q should not leak technical details", msg)
	}
	if !errors.Is(err, primary) {
		t.Fatalf("expected errors.Is(err, primary) to be true")
	}
}