// Package gitfixture reads the seat git's own fixtures (contracts/seats/git/fixtures/verbs.json), so the bridge's unit
// fakes answer what the seat's holder answers and nothing the contract does not say (design 47 *The seat `git`*).
package gitfixture

import (
	"encoding/json"
	"os"
	"path/filepath"
	"runtime"
	"testing"
)

// All is every fixture's body named name of of (such as "file answers", "verb:file.answer"), in the file's order; a
// name with none fails the test.
func All(t testing.TB, name, of string) []json.RawMessage {
	t.Helper()
	return Seat(t, "git", "verbs", name, of)
}

// Seat is every fixture's body named name of of in a seat's fixtures file (such as "mesh-delivery", "events"), so the
// bridge's fakes of the seats it hears say what those seats say.
func Seat(t testing.TB, seat, file, name, of string) []json.RawMessage {
	t.Helper()
	_, here, _, _ := runtime.Caller(0)
	raw, err := os.ReadFile(filepath.Join(filepath.Dir(here), "../../../../contracts/seats", seat, "fixtures", file+".json"))
	if err != nil {
		t.Fatal(err)
	}
	var all []struct {
		Name, Of string
		Given    json.RawMessage
	}
	if err := json.Unmarshal(raw, &all); err != nil {
		t.Fatal(err)
	}
	var out []json.RawMessage
	for _, f := range all {
		if f.Name == name && f.Of == of {
			out = append(out, f.Given)
		}
	}
	if len(out) == 0 {
		t.Fatalf("no fixture %q of %s", name, of)
	}
	return out
}

// Given is the first fixture's body named name of of.
func Given(t testing.TB, name, of string) json.RawMessage { t.Helper(); return All(t, name, of)[0] }