package store_test

import (
	"context"
	"path/filepath"
	"testing"

	"vetting/internal/db"
	"vetting/internal/model"
	"vetting/internal/store"
)

func newDB(t *testing.T) *store.Runs {
	t.Helper()
	path := filepath.Join(t.TempDir(), "vetting.db")
	conn, err := db.Open(path)
	if err != nil {
		t.Fatalf("open db: %v", err)
	}
	t.Cleanup(func() { _ = conn.Close() })
	return &store.Runs{DB: conn}
}

// seedRun inserts a host + a run and returns (hostID, runID). Every
// subsequent store test builds on this so run_id foreign keys resolve.
func seedRun(t *testing.T, runs *store.Runs) (int64, int64) {
	t.Helper()
	hosts := &store.Hosts{DB: runs.DB}
	hostID, err := hosts.Create(context.Background(), model.Host{
		Name:             "t-host",
		MAC:              "aa:bb:cc:dd:ee:ff",
		WoLBroadcastIP:   "10.0.0.255",
		WoLPort:          9,
		ExpectedSpecYAML: "memory:\n  total_gib: 16\n",
	})
	if err != nil {
		t.Fatalf("create host: %v", err)
	}
	runID, err := runs.Create(context.Background(), hostID, "deadbeef")
	if err != nil {
		t.Fatalf("create run: %v", err)
	}
	return hostID, runID
}

func TestArtifactsRoundtrip(t *testing.T) {
	runs := newDB(t)
	_, runID := seedRun(t, runs)
	arts := &store.Artifacts{DB: runs.DB}

	id, err := arts.Create(context.Background(), store.Artifact{
		RunID:     runID,
		Kind:      "inventory",
		Path:      "/var/artifacts/run-1/inventory.json",
		SHA256:    "abc123",
		SizeBytes: 42,
	})
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	if id == 0 {
		t.Fatalf("expected non-zero id")
	}

	// Hold key on the same run — ListForRun should return both in
	// insertion order and TileEnricher picks the hold_key row.
	if _, err := arts.Create(context.Background(), store.Artifact{
		RunID: runID, Kind: "hold_key", Path: "/var/artifacts/run-1/hold.key", SHA256: "def456", SizeBytes: 400,
	}); err != nil {
		t.Fatalf("Create hold_key: %v", err)
	}

	list, err := arts.ListForRun(context.Background(), runID)
	if err != nil {
		t.Fatalf("ListForRun: %v", err)
	}
	if len(list) != 2 {
		t.Fatalf("ListForRun returned %d, want 2", len(list))
	}
	if list[0].Kind != "inventory" || list[1].Kind != "hold_key" {
		t.Fatalf("unexpected order: %+v", list)
	}
	if list[1].Path != "/var/artifacts/run-1/hold.key" {
		t.Fatalf("hold_key path lost: %q", list[1].Path)
	}
}

func TestSpecDiffsReplaceForRun(t *testing.T) {
	runs := newDB(t)
	_, runID := seedRun(t, runs)
	sd := &store.SpecDiffs{DB: runs.DB}
	ctx := context.Background()

	// First write: three diffs.
	err := sd.ReplaceForRun(ctx, runID, []model.SpecDiff{
		{RunID: runID, Field: "cpu.model", Expected: "Xeon", Actual: "EPYC", Severity: "critical"},
		{RunID: runID, Field: "memory.total_gib", Expected: "16", Actual: "8", Severity: "critical"},
		{RunID: runID, Field: "note", Expected: "", Actual: "dusty", Severity: "info"},
	})
	if err != nil {
		t.Fatalf("ReplaceForRun: %v", err)
	}

	list, err := sd.ListForRun(ctx, runID)
	if err != nil {
		t.Fatalf("ListForRun: %v", err)
	}
	if len(list) != 3 {
		t.Fatalf("got %d rows, want 3", len(list))
	}

	// Second write replaces, doesn't append — otherwise a re-run would
	// double-count spec diffs and the tile badge would grow without bound.
	err = sd.ReplaceForRun(ctx, runID, []model.SpecDiff{
		{RunID: runID, Field: "cpu.model", Expected: "Xeon", Actual: "Xeon Gold", Severity: "info"},
	})
	if err != nil {
		t.Fatalf("second ReplaceForRun: %v", err)
	}
	list, err = sd.ListForRun(ctx, runID)
	if err != nil {
		t.Fatalf("ListForRun after replace: %v", err)
	}
	if len(list) != 1 {
		t.Fatalf("expected 1 row after replace, got %d", len(list))
	}
	if list[0].Severity != "info" {
		t.Fatalf("expected severity info, got %q", list[0].Severity)
	}
}

func TestMeasurementsBatchAndList(t *testing.T) {
	runs := newDB(t)
	_, runID := seedRun(t, runs)
	meas := &store.Measurements{DB: runs.DB}
	ctx := context.Background()

	err := meas.CreateBatch(ctx, []model.Measurement{
		{RunID: runID, Kind: "thermal", Key: "cpu", Value: 52.5, Unit: "C"},
		{RunID: runID, Kind: "iperf", Key: "throughput_mbps", Value: 940.1, Unit: "Mbps"},
		{RunID: runID, Kind: "psu", Key: "in0", Value: 12.04, Unit: "V"},
	})
	if err != nil {
		t.Fatalf("CreateBatch: %v", err)
	}

	// Zero-length batch must be a no-op, not an error.
	if err := meas.CreateBatch(ctx, nil); err != nil {
		t.Fatalf("empty CreateBatch: %v", err)
	}

	rows, err := meas.ListForRun(ctx, runID)
	if err != nil {
		t.Fatalf("ListForRun: %v", err)
	}
	if len(rows) != 3 {
		t.Fatalf("got %d rows, want 3", len(rows))
	}
	foundIperf := false
	for _, r := range rows {
		if r.Kind == "iperf" && r.Key == "throughput_mbps" && r.Value > 900 {
			foundIperf = true
		}
	}
	if !foundIperf {
		t.Fatalf("iperf row missing or wrong value: %+v", rows)
	}
}

func TestRunsOverrideFlagsAndClearFailedStage(t *testing.T) {
	runs := newDB(t)
	_, runID := seedRun(t, runs)
	ctx := context.Background()

	if err := runs.SetFailedStage(ctx, runID, "Storage"); err != nil {
		t.Fatalf("SetFailedStage: %v", err)
	}
	if err := runs.SetOverrideFlags(ctx, runID, `{"wipe":true}`); err != nil {
		t.Fatalf("SetOverrideFlags: %v", err)
	}
	run, err := runs.Get(ctx, runID)
	if err != nil {
		t.Fatalf("Get: %v", err)
	}
	if run.OverrideFlagsJSON != `{"wipe":true}` {
		t.Fatalf("OverrideFlagsJSON = %q, want {\"wipe\":true}", run.OverrideFlagsJSON)
	}
	if run.FailedStage != "Storage" {
		t.Fatalf("FailedStage = %q, want Storage", run.FailedStage)
	}
	if err := runs.ClearFailedStage(ctx, runID); err != nil {
		t.Fatalf("ClearFailedStage: %v", err)
	}
	run, err = runs.Get(ctx, runID)
	if err != nil {
		t.Fatalf("Get after clear: %v", err)
	}
	if run.FailedStage != "" {
		t.Fatalf("FailedStage not cleared: %q", run.FailedStage)
	}
	// override_flags_json should persist across ClearFailedStage so the
	// agent can still read it on its next heartbeat.
	if run.OverrideFlagsJSON != `{"wipe":true}` {
		t.Fatalf("OverrideFlagsJSON lost after ClearFailedStage: %q", run.OverrideFlagsJSON)
	}
}

func TestRunsHoldAndFailedStage(t *testing.T) {
	runs := newDB(t)
	_, runID := seedRun(t, runs)
	ctx := context.Background()

	if err := runs.SetHoldIP(ctx, runID, "10.0.0.42"); err != nil {
		t.Fatalf("SetHoldIP: %v", err)
	}
	if err := runs.SetFailedStage(ctx, runID, "SpecValidate"); err != nil {
		t.Fatalf("SetFailedStage: %v", err)
	}
	run, err := runs.Get(ctx, runID)
	if err != nil {
		t.Fatalf("Get: %v", err)
	}
	if run.HoldIP != "10.0.0.42" {
		t.Fatalf("HoldIP = %q, want 10.0.0.42", run.HoldIP)
	}
	if run.FailedStage != "SpecValidate" {
		t.Fatalf("FailedStage = %q, want SpecValidate", run.FailedStage)
	}
}