package inventory

import (
	"encoding/json"
	"os"
	"strings"
	"testing"
)

// **The store the tests run is the store the mesh runs** (novox/hq ADR 0227 rule 9, ADR 0237). In a merge
// check the build seat raises the store of the major release the facts snapshot says the mesh's store
// runs; this holds the two equal there, so a test passing here is a test passing on that release. Without
// a snapshot — on a workstation — it says what it ran against and compares nothing.
func TestTheStoreTheTestsRunIsTheStoreTheMeshRuns(t *testing.T) {
	inv := ForTest(t)
	ran, err := inv.ServerVersionForTest(t)
	if err != nil {
		t.Fatal(err)
	}
	path := os.Getenv("MESH_FACTS")
	if path == "" {
		t.Logf("the tests ran the store at %s; with no MESH_FACTS, nothing to compare it with", ran)
		return
	}
	body, err := os.ReadFile(path)
	if err != nil {
		t.Fatal(err)
	}
	var f struct {
		Versions struct {
			Store string `json:"store"`
		} `json:"versions"`
	}
	if err := json.Unmarshal(body, &f); err != nil {
		t.Fatal(err)
	}
	major := func(v string) string { m, _, _ := strings.Cut(strings.TrimSpace(v), "."); return m }
	if f.Versions.Store != "" && major(ran) != major(f.Versions.Store) {
		t.Errorf("the tests ran the store at %s and the mesh's store runs %s", ran, f.Versions.Store)
	}
}

// ServerVersionForTest is the store's own word for its release.
func (i *Inventory) ServerVersionForTest(t *testing.T) (string, error) {
	t.Helper()
	var v string
	err := i.store.Pool().QueryRow(t.Context(), `show server_version`).Scan(&v)
	return v, err
}