package command_test

import (
	"testing"

	"task/internal/command"
	"task/internal/ticket"
)

func TestHistoryUndoRedoCreateDelete(t *testing.T) {
	store := ticket.NewJSONStore(t.TempDir())
	h := command.NewHistory()

	create := &command.CreateTicket{
		Store: store,
		Ticket: ticket.Ticket{
			Title:     "A",
			ProjectID: "inbox",
			Status:    ticket.StatusTodo,
		},
	}
	if err := h.Do(create); err != nil {
		t.Fatal(err)
	}
	list, err := store.List("inbox")
	if err != nil || len(list) != 1 {
		t.Fatalf("after create: %v len=%d", err, len(list))
	}

	if err := h.Undo(); err != nil {
		t.Fatal(err)
	}
	list, err = store.List("inbox")
	if err != nil || len(list) != 0 {
		t.Fatalf("after undo create: %v len=%d", err, len(list))
	}

	if err := h.Redo(); err != nil {
		t.Fatal(err)
	}
	list, err = store.List("inbox")
	if err != nil || len(list) != 1 {
		t.Fatalf("after redo create: %v len=%d", err, len(list))
	}

	del := &command.DeleteTicket{Store: store, Snapshot: list[0]}
	if err := h.Do(del); err != nil {
		t.Fatal(err)
	}
	list, _ = store.List("inbox")
	if len(list) != 0 {
		t.Fatal("expected empty after delete")
	}
	if err := h.Undo(); err != nil {
		t.Fatal(err)
	}
	list, _ = store.List("inbox")
	if len(list) != 1 {
		t.Fatal("expected restored after undo delete")
	}
}

func TestHistoryUpdateUndo(t *testing.T) {
	store := ticket.NewJSONStore(t.TempDir())
	created, err := store.Create(ticket.Ticket{
		Title: "A", ProjectID: "inbox", Status: ticket.StatusTodo,
	})
	if err != nil {
		t.Fatal(err)
	}
	after := created
	after.Status = ticket.StatusDone
	after.Title = "B"

	h := command.NewHistory()
	if err := h.Do(&command.UpdateTicket{Store: store, Before: created, After: after}); err != nil {
		t.Fatal(err)
	}
	got, _ := store.Get(created.ID)
	if got.Status != ticket.StatusDone || got.Title != "B" {
		t.Fatalf("got %+v", got)
	}
	if err := h.Undo(); err != nil {
		t.Fatal(err)
	}
	got, _ = store.Get(created.ID)
	if got.Status != ticket.StatusTodo || got.Title != "A" {
		t.Fatalf("undo got %+v", got)
	}
}