package rootparticipation

import (
	"context"
	"encoding/json"
	"errors"
	"testing"
)

func TestHoldUpdateRefusesAcquisitionsWithoutACensus(t *testing.T) {
	l := censusFixture(t)
	refused := errors.New("census refused")
	l.VerifyLaunches = func(context.Context, uint64) error { return refused }
	// BeginUpdate cannot hold: its census refuses and it withdraws the record.
	if err := l.BeginUpdate(t.Context(), "tx-1"); !errors.Is(err, refused) {
		t.Fatalf("BeginUpdate = %v", err)
	}
	if err := l.Acquire(t.Context(), func() error { return nil }); err != nil {
		t.Fatalf("fixture: acquisition refused before the hold: %v", err)
	}
	if err := l.HoldUpdate(t.Context(), "tx-1"); err != nil {
		t.Fatal(err)
	}
	if id, err := l.UpdateID(); err != nil || id != "tx-1" {
		t.Fatalf("held record = %q, %v", id, err)
	}
	if err := l.Acquire(t.Context(), func() error { return nil }); !errors.Is(err, ErrUnavailable) {
		t.Fatalf("acquisition under the hold = %v, want refused", err)
	}
	// A second hold keeps the record as it is; only EndUpdateWith, with its
	// census, removes it.
	if err := l.HoldUpdate(t.Context(), "tx-2"); err != nil {
		t.Fatal(err)
	}
	if id, _ := l.UpdateID(); id != "tx-1" {
		t.Fatalf("a second hold replaced the record with %q", id)
	}
	if err := l.EndUpdateWith(t.Context(), "tx-1", nil); !errors.Is(err, refused) {
		t.Fatalf("EndUpdateWith under a refusing census = %v", err)
	}
	l.VerifyLaunches = func(context.Context, uint64) error { return nil }
	if err := l.EndUpdateWith(t.Context(), "tx-1", nil); err != nil {
		t.Fatal(err)
	}
	if err := l.Acquire(t.Context(), func() error { return nil }); err != nil {
		t.Fatalf("acquisition after settlement = %v", err)
	}
	if err := l.HoldUpdate(t.Context(), "bad id"); !errors.Is(err, ErrUnavailable) {
		t.Fatalf("invalid id = %v", err)
	}
}

func TestHoldUpdateLeavesAPendingAcquisitionCensusAlone(t *testing.T) {
	l := censusFixture(t)
	b, _ := json.Marshal(Census{Schema: 1, Box: "box", Enrollment: "en", Migration: 1, Revision: 2, Complete: true, LaunchRevision: 1, Pending: "acquisition"})
	if err := l.State.Write("census.json", b); err != nil {
		t.Fatal(err)
	}
	if err := l.HoldUpdate(t.Context(), "tx-1"); err != nil {
		t.Fatal(err)
	}
	if _, err := l.State.Read("update.json"); err == nil {
		t.Fatal("hold wrote a record over a pending acquisition")
	}
	if err := l.Acquire(t.Context(), func() error { return nil }); err == nil {
		t.Fatal("a pending acquisition census accepted a new acquisition")
	}
}