package app_test

import (
	"path/filepath"
	"testing"

	"github.com/andyleap/hnh-map/internal/app"
	"github.com/andyleap/hnh-map/internal/app/store"
	"go.etcd.io/bbolt"
)

func newTestDB(t *testing.T) *bbolt.DB {
	t.Helper()
	dir := t.TempDir()
	db, err := bbolt.Open(filepath.Join(dir, "test.db"), 0600, nil)
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { db.Close() })
	return db
}

func TestRunMigrations_FreshDB(t *testing.T) {
	db := newTestDB(t)
	if err := app.RunMigrations(db); err != nil {
		t.Fatalf("migrations failed on fresh DB: %v", err)
	}

	if err := db.View(func(tx *bbolt.Tx) error {
		b := tx.Bucket(store.BucketConfig)
		if b == nil {
			t.Fatal("expected config bucket after migrations")
		}
		v := b.Get([]byte("version"))
		if v == nil {
			t.Fatal("expected version key in config")
		}
		title := b.Get([]byte("title"))
		if title == nil || string(title) != "HnH Automapper Server" {
			t.Fatalf("expected default title, got %s", title)
		}
		return nil
	}); err != nil {
		t.Fatal(err)
	}

	if tx, _ := db.Begin(false); tx != nil {
		if tx.Bucket(store.BucketOAuthStates) == nil {
			t.Fatal("expected oauth_states bucket after migrations")
		}
		_ = tx.Rollback()
	}
}

func TestRunMigrations_Idempotent(t *testing.T) {
	db := newTestDB(t)

	if err := app.RunMigrations(db); err != nil {
		t.Fatalf("first run failed: %v", err)
	}

	if err := app.RunMigrations(db); err != nil {
		t.Fatalf("second run failed: %v", err)
	}

	if err := db.View(func(tx *bbolt.Tx) error {
		b := tx.Bucket(store.BucketConfig)
		if b == nil {
			t.Fatal("expected config bucket")
		}
		v := b.Get([]byte("version"))
		if v == nil {
			t.Fatal("expected version key")
		}
		return nil
	}); err != nil {
		t.Fatal(err)
	}
}

func TestRunMigrations_SetsVersion(t *testing.T) {
	db := newTestDB(t)
	if err := app.RunMigrations(db); err != nil {
		t.Fatal(err)
	}

	var version string
	if err := db.View(func(tx *bbolt.Tx) error {
		b := tx.Bucket(store.BucketConfig)
		version = string(b.Get([]byte("version")))
		return nil
	}); err != nil {
		t.Fatal(err)
	}

	if version == "" || version == "0" {
		t.Fatalf("expected non-zero version, got %q", version)
	}
}