package ticket_test

import (
	"os"
	"path/filepath"
	"testing"

	"task/internal/ticket"
)

func TestJSONStoreCreateListUpdate(t *testing.T) {
	dir := t.TempDir()
	store := ticket.NewJSONStore(dir)

	created, err := store.Create(ticket.Ticket{
		Title:     "Write tests",
		ProjectID: "inbox",
	})
	if err != nil {
		t.Fatalf("Create: %v", err)
	}
	if created.ID == "" {
		t.Fatal("expected ID to be set")
	}
	if created.Status != ticket.StatusTodo {
		t.Fatalf("status = %s, want todo", created.Status)
	}

	list, err := store.List("inbox")
	if err != nil {
		t.Fatalf("List: %v", err)
	}
	if len(list) != 1 {
		t.Fatalf("len(list) = %d, want 1", len(list))
	}

	path := filepath.Join(dir, "projects", "inbox", "tickets.json")
	if _, err := os.Stat(path); err != nil {
		t.Fatalf("tickets.json missing: %v", err)
	}

	created.Status = ticket.StatusDone
	created.Title = "Write better tests"
	if err := store.Update(created); err != nil {
		t.Fatalf("Update: %v", err)
	}

	got, err := store.Get(created.ID)
	if err != nil {
		t.Fatalf("Get: %v", err)
	}
	if got.Status != ticket.StatusDone || got.Title != "Write better tests" {
		t.Fatalf("got %+v", got)
	}

	if err := store.Delete(created.ID); err != nil {
		t.Fatalf("Delete: %v", err)
	}
	list, err = store.List("inbox")
	if err != nil {
		t.Fatalf("List after delete: %v", err)
	}
	if len(list) != 0 {
		t.Fatalf("len(list) = %d, want 0", len(list))
	}
}

func TestJSONStoreMigratesLegacyTasksJSON(t *testing.T) {
	dir := t.TempDir()
	projectDir := filepath.Join(dir, "projects", "inbox")
	if err := os.MkdirAll(projectDir, 0o755); err != nil {
		t.Fatal(err)
	}
	legacy := `[{"id":"abc","title":"Legacy","status":"todo","projectId":"inbox","createdAt":"2024-01-01T00:00:00Z","updatedAt":"2024-01-01T00:00:00Z"}]`
	if err := os.WriteFile(filepath.Join(projectDir, "tasks.json"), []byte(legacy), 0o644); err != nil {
		t.Fatal(err)
	}

	store := ticket.NewJSONStore(dir)
	list, err := store.List("inbox")
	if err != nil {
		t.Fatalf("List: %v", err)
	}
	if len(list) != 1 || list[0].Title != "Legacy" {
		t.Fatalf("got %+v", list)
	}

	// Write should create tickets.json and remove legacy.
	list[0].Title = "Migrated"
	if err := store.Update(list[0]); err != nil {
		t.Fatalf("Update: %v", err)
	}
	if _, err := os.Stat(filepath.Join(projectDir, "tickets.json")); err != nil {
		t.Fatalf("tickets.json missing after write: %v", err)
	}
	if _, err := os.Stat(filepath.Join(projectDir, "tasks.json")); !os.IsNotExist(err) {
		t.Fatalf("legacy tasks.json should be removed, err=%v", err)
	}
}

func TestJSONStoreMove(t *testing.T) {
	dir := t.TempDir()
	store := ticket.NewJSONStore(dir)

	created, err := store.Create(ticket.Ticket{
		Title:     "Misfiled",
		ProjectID: "inbox",
	})
	if err != nil {
		t.Fatal(err)
	}

	moved, err := store.Move(created.ID, "client")
	if err != nil {
		t.Fatal(err)
	}
	if moved.ProjectID != "client" {
		t.Fatalf("ProjectID = %q", moved.ProjectID)
	}

	from, err := store.List("inbox")
	if err != nil || len(from) != 0 {
		t.Fatalf("inbox after move: %v len=%d", err, len(from))
	}
	to, err := store.List("client")
	if err != nil || len(to) != 1 || to[0].ID != created.ID {
		t.Fatalf("client after move: %v %+v", err, to)
	}
}