package store

import (
	"errors"
	"path/filepath"
	"testing"
)

func TestStoreRejectsForeignDispatcherWithoutTouchingOutbox(t *testing.T) {
	const foreignID = "862c8e9b-26b8-4642-9fac-c7d85f487a30"
	const eventID = "retained-outbox-event"
	const originalBody = `{"proof":"original"}`
	path := filepath.Join(t.TempDir(), "dispatcher.sqlite")
	owner, err := Open(path)
	if err != nil {
		t.Fatal(err)
	}
	if err := owner.CloseAdmission(currentDispatcherID); err != nil {
		t.Fatal(err)
	}
	if _, err := owner.db.Exec(`INSERT INTO dispatcher_outbox(dispatcher_id,event_id,event_type,routing_key,body,confirmed)
        VALUES(?,?,?,?,?,0)`, currentDispatcherID, eventID, "call.execute.result", "agent-call.saas.events.v1", []byte(originalBody)); err != nil {
		t.Fatal(err)
	}
	if err := owner.Close(); err != nil {
		t.Fatal(err)
	}

	foreign, err := Open(path)
	if err != nil {
		t.Fatal(err)
	}
	defer foreign.Close()
	if err := foreign.CloseAdmission(foreignID); !errors.Is(err, ErrDispatcherIdentityMismatch) {
		t.Fatalf("foreign Dispatcher admitted to an existing database: %v", err)
	}
	var count int
	var survivingID string
	if err := foreign.db.QueryRow(`SELECT COUNT(*), MIN(dispatcher_id) FROM dispatcher_state`).Scan(&count, &survivingID); err != nil {
		t.Fatal(err)
	}
	if count != 1 || survivingID != currentDispatcherID {
		t.Fatalf("foreign startup changed the original Dispatcher identity: count=%d identity=%q", count, survivingID)
	}
	var body []byte
	var confirmed int
	if err := foreign.db.QueryRow(`SELECT body,confirmed FROM dispatcher_outbox WHERE dispatcher_id=? AND event_id=?`, currentDispatcherID, eventID).Scan(&body, &confirmed); err != nil {
		t.Fatal(err)
	}
	if string(body) != originalBody || confirmed != 0 {
		t.Fatal("foreign startup changed an unconfirmed original outbox record")
	}
}