package importer

import (
	"testing"
	"time"

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

func mkFinding(provider, masked, source string, line int) engine.Finding {
	return engine.Finding{
		ProviderName: provider,
		KeyMasked:    masked,
		Source:       source,
		LineNumber:   line,
	}
}

func TestFindingKey_Stable(t *testing.T) {
	f := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 42)
	if FindingKey(f) != FindingKey(f) {
		t.Fatal("FindingKey must be deterministic for identical input")
	}
}

func TestFindingKey_DiffersByProvider(t *testing.T) {
	a := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 42)
	b := mkFinding("anthropic", "sk-abc12...wxyz", "src/app.go", 42)
	if FindingKey(a) == FindingKey(b) {
		t.Fatal("different providers must yield different keys")
	}
}

func TestFindingKey_DiffersByMasked(t *testing.T) {
	a := mkFinding("openai", "sk-aaaaa...wxyz", "src/app.go", 42)
	b := mkFinding("openai", "sk-bbbbb...wxyz", "src/app.go", 42)
	if FindingKey(a) == FindingKey(b) {
		t.Fatal("different masked keys must yield different keys")
	}
}

func TestFindingKey_DiffersBySource(t *testing.T) {
	a := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 42)
	b := mkFinding("openai", "sk-abc12...wxyz", "src/other.go", 42)
	if FindingKey(a) == FindingKey(b) {
		t.Fatal("different sources must yield different keys")
	}
}

func TestFindingKey_DiffersByLine(t *testing.T) {
	a := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 42)
	b := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 43)
	if FindingKey(a) == FindingKey(b) {
		t.Fatal("different line numbers must yield different keys")
	}
}

func TestDedup_PreservesOrder(t *testing.T) {
	a := mkFinding("openai", "sk-aaa...0001", "file_a.go", 1)
	b := mkFinding("openai", "sk-bbb...0002", "file_b.go", 2)
	c := mkFinding("openai", "sk-ccc...0003", "file_c.go", 3)
	in := []engine.Finding{a, b, a, c, b}

	out, dropped := Dedup(in)

	if dropped != 2 {
		t.Fatalf("expected 2 dropped, got %d", dropped)
	}
	if len(out) != 3 {
		t.Fatalf("expected 3 unique, got %d", len(out))
	}
	if out[0].KeyMasked != a.KeyMasked || out[1].KeyMasked != b.KeyMasked || out[2].KeyMasked != c.KeyMasked {
		t.Fatalf("dedup did not preserve first-seen order: %+v", out)
	}
}

func TestDedup_Empty(t *testing.T) {
	out, dropped := Dedup(nil)
	if dropped != 0 {
		t.Fatalf("expected 0 dropped, got %d", dropped)
	}
	if len(out) != 0 {
		t.Fatalf("expected empty output, got %d", len(out))
	}
}

func TestDedup_IgnoresUnrelatedFields(t *testing.T) {
	base := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 42)
	base.DetectedAt = time.Now()
	base.Confidence = "high"

	twin := mkFinding("openai", "sk-abc12...wxyz", "src/app.go", 42)
	twin.DetectedAt = base.DetectedAt.Add(24 * time.Hour)
	twin.Confidence = "low"

	out, dropped := Dedup([]engine.Finding{base, twin})
	if dropped != 1 {
		t.Fatalf("expected 1 dropped, got %d", dropped)
	}
	if len(out) != 1 {
		t.Fatalf("expected 1 kept, got %d", len(out))
	}
	if out[0].Confidence != "high" {
		t.Fatalf("expected first-seen to be kept, got Confidence=%s", out[0].Confidence)
	}
}
