package receiver

import (
	"os"
	"path/filepath"
	"testing"
	"time"

	"edp.buildth.ing/DevFW-CICD/forgejo-runner-resource-collector/internal/summary"
)

func TestNewStore(t *testing.T) {
	dbPath := filepath.Join(t.TempDir(), "test.db")

	store, err := NewStore(dbPath)
	if err != nil {
		t.Fatalf("NewStore() error = %v", err)
	}
	defer func() { _ = store.Close() }()

	if _, err := os.Stat(dbPath); os.IsNotExist(err) {
		t.Error("database file was not created")
	}
}

func TestStore_SaveMetric(t *testing.T) {
	store := newTestStore(t)
	defer func() { _ = store.Close() }()

	payload := &MetricsPayload{
		Execution: ExecutionContext{
			Organization: "test-org",
			Repository:   "test-repo",
			Workflow:     "ci.yml",
			Job:          "build",
			RunID:        "run-123",
		},
		Summary: summary.RunSummary{
			StartTime:       time.Now().Add(-time.Minute),
			EndTime:         time.Now(),
			DurationSeconds: 60.0,
			SampleCount:     12,
			CPUTotal:        summary.StatSummary{Peak: 80.5, Avg: 45.2, P95: 75.0},
			MemUsedBytes:    summary.StatSummary{Peak: 1024000, Avg: 512000, P95: 900000},
			MemUsedPercent:  summary.StatSummary{Peak: 50.0, Avg: 25.0, P95: 45.0},
		},
	}

	id, err := store.SaveMetric(payload)
	if err != nil {
		t.Fatalf("SaveMetric() error = %v", err)
	}
	if id == 0 {
		t.Error("SaveMetric() returned id = 0, want non-zero")
	}
}

func TestStore_GetMetricsByRunID(t *testing.T) {
	store := newTestStore(t)
	defer func() { _ = store.Close() }()

	// Save two metrics with same run ID
	for i := 0; i < 2; i++ {
		payload := &MetricsPayload{
			Execution: ExecutionContext{
				Organization: "test-org",
				Repository:   "test-repo",
				Workflow:     "ci.yml",
				Job:          "build",
				RunID:        "run-456",
			},
			Summary: summary.RunSummary{SampleCount: i + 1},
		}
		if _, err := store.SaveMetric(payload); err != nil {
			t.Fatalf("SaveMetric() error = %v", err)
		}
	}

	// Save one with different run ID
	otherPayload := &MetricsPayload{
		Execution: ExecutionContext{RunID: "run-789"},
		Summary:   summary.RunSummary{},
	}
	if _, err := store.SaveMetric(otherPayload); err != nil {
		t.Fatalf("SaveMetric() error = %v", err)
	}

	metrics, err := store.GetMetricsByRunID("run-456")
	if err != nil {
		t.Fatalf("GetMetricsByRunID() error = %v", err)
	}
	if len(metrics) != 2 {
		t.Errorf("GetMetricsByRunID() returned %d metrics, want 2", len(metrics))
	}

	for _, m := range metrics {
		if m.RunID != "run-456" {
			t.Errorf("GetMetricsByRunID() returned metric with RunID = %q, want %q", m.RunID, "run-456")
		}
	}
}

func TestStore_GetMetricsByRunID_NotFound(t *testing.T) {
	store := newTestStore(t)
	defer func() { _ = store.Close() }()

	metrics, err := store.GetMetricsByRunID("nonexistent")
	if err != nil {
		t.Fatalf("GetMetricsByRunID() error = %v", err)
	}
	if len(metrics) != 0 {
		t.Errorf("GetMetricsByRunID() returned %d metrics, want 0", len(metrics))
	}
}

func TestStore_GetMetricsByRepository(t *testing.T) {
	store := newTestStore(t)
	defer func() { _ = store.Close() }()

	// Save metrics for different repos
	repos := []struct {
		org  string
		repo string
	}{
		{"org-a", "repo-1"},
		{"org-a", "repo-1"},
		{"org-a", "repo-2"},
		{"org-b", "repo-1"},
	}

	for i, r := range repos {
		payload := &MetricsPayload{
			Execution: ExecutionContext{
				Organization: r.org,
				Repository:   r.repo,
				RunID:        "run-" + string(rune('a'+i)),
			},
			Summary: summary.RunSummary{},
		}
		if _, err := store.SaveMetric(payload); err != nil {
			t.Fatalf("SaveMetric() error = %v", err)
		}
	}

	metrics, err := store.GetMetricsByRepository("org-a", "repo-1")
	if err != nil {
		t.Fatalf("GetMetricsByRepository() error = %v", err)
	}
	if len(metrics) != 2 {
		t.Errorf("GetMetricsByRepository() returned %d metrics, want 2", len(metrics))
	}

	for _, m := range metrics {
		if m.Organization != "org-a" || m.Repository != "repo-1" {
			t.Errorf("GetMetricsByRepository() returned metric with org=%q repo=%q, want org-a/repo-1",
				m.Organization, m.Repository)
		}
	}
}

func TestStore_SaveMetric_PreservesPayload(t *testing.T) {
	store := newTestStore(t)
	defer func() { _ = store.Close() }()

	original := &MetricsPayload{
		Execution: ExecutionContext{
			Organization: "test-org",
			Repository:   "test-repo",
			Workflow:     "build.yml",
			Job:          "test",
			RunID:        "run-preserve",
		},
		Summary: summary.RunSummary{
			DurationSeconds: 123.45,
			SampleCount:     50,
			CPUTotal:        summary.StatSummary{Peak: 99.9, Avg: 55.5, P95: 88.8},
		},
	}

	_, err := store.SaveMetric(original)
	if err != nil {
		t.Fatalf("SaveMetric() error = %v", err)
	}

	metrics, err := store.GetMetricsByRunID("run-preserve")
	if err != nil {
		t.Fatalf("GetMetricsByRunID() error = %v", err)
	}
	if len(metrics) != 1 {
		t.Fatalf("GetMetricsByRunID() returned %d metrics, want 1", len(metrics))
	}

	m := metrics[0]
	if m.Organization != original.Execution.Organization {
		t.Errorf("Organization = %q, want %q", m.Organization, original.Execution.Organization)
	}
	if m.Repository != original.Execution.Repository {
		t.Errorf("Repository = %q, want %q", m.Repository, original.Execution.Repository)
	}
	if m.Workflow != original.Execution.Workflow {
		t.Errorf("Workflow = %q, want %q", m.Workflow, original.Execution.Workflow)
	}
	if m.Job != original.Execution.Job {
		t.Errorf("Job = %q, want %q", m.Job, original.Execution.Job)
	}
	if m.Payload == "" {
		t.Error("Payload is empty")
	}
}

func newTestStore(t *testing.T) *Store {
	t.Helper()
	dbPath := filepath.Join(t.TempDir(), "test.db")
	store, err := NewStore(dbPath)
	if err != nil {
		t.Fatalf("NewStore() error = %v", err)
	}
	return store
}