package sources

import (
	"reflect"
	"testing"

	"github.com/salvacybersec/keyhunter/pkg/providers"
)

func testRegistry() *providers.Registry {
	return providers.NewRegistryFromProviders([]providers.Provider{
		{
			Name:     "openai",
			Keywords: []string{"sk-proj-", "sk-"},
		},
		{
			Name:     "anthropic",
			Keywords: []string{"sk-ant-", "sk-"}, // shared "sk-" for dedup test
		},
		{
			Name:     "empty-kw",
			Keywords: []string{},
		},
	})
}

func TestBuildQueries_GitHub(t *testing.T) {
	got := BuildQueries(testRegistry(), "github")
	want := []string{
		`"sk-" in:file`,
		`"sk-ant-" in:file`,
		`"sk-proj-" in:file`,
	}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("github queries mismatch:\n got=%v\nwant=%v", got, want)
	}
}

func TestBuildQueries_Gist(t *testing.T) {
	got := BuildQueries(testRegistry(), "gist")
	if len(got) != 3 {
		t.Fatalf("expected 3 queries, got %d: %v", len(got), got)
	}
	if got[0] != `"sk-" in:file` {
		t.Fatalf("gist should use in:file syntax, got %q", got[0])
	}
}

func TestBuildQueries_GitLab(t *testing.T) {
	got := BuildQueries(testRegistry(), "gitlab")
	want := []string{"sk-", "sk-ant-", "sk-proj-"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("gitlab queries mismatch:\n got=%v\nwant=%v", got, want)
	}
}

func TestBuildQueries_HuggingFace(t *testing.T) {
	got := BuildQueries(testRegistry(), "huggingface")
	want := []string{"sk-", "sk-ant-", "sk-proj-"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("huggingface queries mismatch:\n got=%v\nwant=%v", got, want)
	}
}

func TestBuildQueries_UnknownSourceDefault(t *testing.T) {
	got := BuildQueries(testRegistry(), "mystery-source")
	want := []string{"sk-", "sk-ant-", "sk-proj-"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("default queries mismatch:\n got=%v\nwant=%v", got, want)
	}
}

func TestBuildQueries_NilRegistry(t *testing.T) {
	if got := BuildQueries(nil, "github"); got != nil {
		t.Fatalf("expected nil for nil registry, got %v", got)
	}
}

func TestBuildQueries_DedupAcrossProviders(t *testing.T) {
	// "sk-" is shared by openai and anthropic — should appear exactly once.
	got := BuildQueries(testRegistry(), "gitlab")
	count := 0
	for _, q := range got {
		if q == "sk-" {
			count++
		}
	}
	if count != 1 {
		t.Fatalf("expected dedup of 'sk-' to 1 occurrence, got %d", count)
	}
}

func TestBuildQueries_EmptyKeywordsSkipped(t *testing.T) {
	reg := providers.NewRegistryFromProviders([]providers.Provider{
		{Name: "only-empty", Keywords: []string{"", ""}},
		{Name: "real", Keywords: []string{"xyz"}},
	})
	got := BuildQueries(reg, "gitlab")
	want := []string{"xyz"}
	if !reflect.DeepEqual(got, want) {
		t.Fatalf("empty keywords should be skipped:\n got=%v\nwant=%v", got, want)
	}
}

func TestRegisterAll_NilEngineNoPanic(t *testing.T) {
	defer func() {
		if r := recover(); r != nil {
			t.Fatalf("RegisterAll(nil, ...) panicked: %v", r)
		}
	}()
	RegisterAll(nil, SourcesConfig{})
}

func TestRegisterAll_EmptyCfgNoPanic(t *testing.T) {
	defer func() {
		if r := recover(); r != nil {
			t.Fatalf("RegisterAll panicked with empty cfg: %v", r)
		}
	}()
	// Use a non-nil engine so the nil-guard early-return doesn't mask issues.
	// Import cycle prevention: pkg/recon is imported by register.go.
	eng := newTestEngine()
	RegisterAll(eng, SourcesConfig{})
}