package continuity

import (
	"crypto/sha256"
	"encoding/hex"
	"os"
	"os/exec"
	"path/filepath"
	"testing"

	"orchestra/internal/store"
)

func TestHandoffCASAndPickup(t *testing.T) {
	root := t.TempDir()
	run := func(a ...string) {
		c := exec.Command("git", append([]string{"-C", root}, a...)...)
		c.Env = append(os.Environ(), "GIT_AUTHOR_NAME=test", "GIT_AUTHOR_EMAIL=test@example", "GIT_COMMITTER_NAME=test", "GIT_COMMITTER_EMAIL=test@example")
		if b, e := c.CombinedOutput(); e != nil {
			t.Fatalf("git: %s %v", b, e)
		}
	}
	os.WriteFile(filepath.Join(root, "TASK.md"), []byte("original"), 0644)
	run("init")
	run("add", "TASK.md")
	run("commit", "-m", "init")
	head := runOut(t, root, "rev-parse", "HEAD")
	task := sha256.Sum256([]byte("original"))
	s, _ := store.Open(t.TempDir())
	h := Handoff{Meta: Meta{ID: "h1", Reason: "manual"}, Anchor: Anchor{GitSHA: head, Branch: "main"}, Goal: "ship", DoneWhen: []string{"tests pass"}, Action: "test", Command: "go test ./...", LastResult: Result{AtSHA: head}}
	ref, e := Save(h, s)
	if e != nil {
		t.Fatal(e)
	}
	got, e := Load(ref, s)
	if e != nil || got.Meta.ID != "h1" {
		t.Fatalf("load: %v", e)
	}
	if e = ValidatePickup(root, got, hex.EncodeToString(task[:])); e != nil {
		t.Fatal(e)
	}
}
func runOut(t *testing.T, root string, a ...string) string {
	b, e := exec.Command("git", append([]string{"-C", root}, a...)...).Output()
	if e != nil {
		t.Fatal(e)
	}
	return string(b[:len(b)-1])
}

func TestDecodeRejectsUnknownKnowledgeFields(t *testing.T) {
	_, e := Decode([]byte(`{"meta":{"id":"x","reason":"manual","rotation_index":0},"unknown":1}`))
	if e == nil {
		t.Fatal("expected strict schema error")
	}
}