package bolt

import (
	"fmt"
	"github.com/stretchr/testify/assert"
	"go.etcd.io/bbolt"
	"testing"
	"time"
)

func TestIndex(t *testing.T) {
	ns := time.Now().Nanosecond()
	path := fmt.Sprintf("/tmp/stufflog_idx_test_%s_%d.db", time.Now().Format("20060102150405"), ns)
	db, err := bbolt.Open(path, 0744, nil)
	if err != nil {
		t.Fatal("Failed to open db:", err)
	}

	idx, err := newIndex(db, "idx", "stuff", "things")
	idx2, err := newIndex(db, "idx", "stuff2", "things")

	testId := []byte("Test")
	test2Id := []byte("Test2")
	test3Id := []byte("Test3")
	test4Id := []byte("Test4")

	t.Run("Insert Initial", func(t *testing.T) {
		_ = db.Update(func(tx *bbolt.Tx) error {
			itx := idx.WithTx(tx)
			itx2 := idx2.WithTx(tx)

			assert.NoError(t, itx.Set(testId, "A", "B", "C", "D", "E"))
			assert.NoError(t, itx.Set(test2Id, "B", "C"))
			assert.NoError(t, itx.Set(test3Id, "A", "C", "D"))
			assert.NoError(t, itx.Set(test4Id, "A", "C", "D"))
			assert.NoError(t, itx2.Set(testId, "user_0"))
			assert.NoError(t, itx2.Set(test2Id, "user_1"))
			assert.NoError(t, itx2.Set(test3Id, "user_2"))

			assert.NoError(t, itx.Set(testId, "A", "B", "C"))
			assert.NoError(t, itx.Set(testId, "A", "C"))
			assert.NoError(t, itx.Set(test4Id))

			return nil
		})
	})
	if t.Failed() {
		return
	}

	t.Run("Check Initial", func(t *testing.T) {
		_ = db.View(func(tx *bbolt.Tx) error {
			itx := idx.WithTx(tx)
			itx2 := idx2.WithTx(tx)

			ids, err := itx.Get("A")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{testId, test3Id}, ids)
			ids, err = itx.Get("B")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{test2Id}, ids)
			ids, err = itx.Get("C")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{testId, test2Id, test3Id}, ids)
			ids, err = itx.Get("D")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{test3Id}, ids)

			ids, err = itx2.Get("user_0")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{testId}, ids)
			ids, err = itx2.Get("user_1")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{test2Id}, ids)
			ids, err = itx2.Get("user_2")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{test3Id}, ids)

			return nil
		})
	})
	if t.Failed() {
		return
	}

	t.Run("Check Initial Reverse", func(t *testing.T) {
		_ = db.View(func(tx *bbolt.Tx) error {
			itx := idx.WithTx(tx)
			itx2 := idx2.WithTx(tx)

			values, err := itx.Reverse(testId)
			assert.NoError(t, err)
			assert.Equal(t, []string{"A", "C"}, values)
			values, err = itx.Reverse(test2Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"B", "C"}, values)
			values, err = itx.Reverse(test3Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"A", "C", "D"}, values)
			values, err = itx.Reverse(test4Id)
			assert.NoError(t, err)
			assert.Empty(t, values)

			values, err = itx2.Reverse(testId)
			assert.NoError(t, err)
			assert.Equal(t, []string{"user_0"}, values)
			values, err = itx2.Reverse(test2Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"user_1"}, values)
			values, err = itx2.Reverse(test3Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"user_2"}, values)

			return nil
		})
	})
	if t.Failed() {
		return
	}

	t.Run("Nuke 'n Pave", func(t *testing.T) {
		_ = db.Update(func(tx *bbolt.Tx) error {
			assert.NoError(t, idx.Reset(tx))
			assert.NoError(t, idx2.Reset(tx))

			itx := idx.WithTx(tx)
			itx2 := idx2.WithTx(tx)

			assert.NoError(t, itx.Set(testId, "pave"))
			assert.NoError(t, itx.Set(test2Id, "pave"))
			assert.NoError(t, itx.Set(test3Id, "pave"))
			assert.NoError(t, itx2.Set(testId, "pave2"))
			assert.NoError(t, itx2.Set(test3Id, "pave2"))

			return nil
		})
	})
	if t.Failed() {
		return
	}

	t.Run("Check Nuke 'n Pave", func(t *testing.T) {
		_ = db.View(func(tx *bbolt.Tx) error {
			itx := idx.WithTx(tx)
			itx2 := idx2.WithTx(tx)

			ids, err := itx.Get("A")
			assert.NoError(t, err)
			assert.Empty(t, ids)
			ids, err = itx.Get("B")
			assert.NoError(t, err)
			assert.Empty(t, ids)
			ids, err = itx.Get("C")
			assert.NoError(t, err)
			assert.Empty(t, ids)
			ids, err = itx.Get("D")
			assert.NoError(t, err)
			assert.Empty(t, ids)

			ids, err = itx2.Get("user_0")
			assert.NoError(t, err)
			assert.Empty(t, ids)
			ids, err = itx2.Get("user_1")
			assert.NoError(t, err)
			assert.Empty(t, ids)
			ids, err = itx2.Get("user_2")
			assert.NoError(t, err)
			assert.Empty(t, ids)

			ids, err = itx.Get("pave")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{testId, test2Id, test3Id}, ids)
			ids, err = itx2.Get("pave2")
			assert.NoError(t, err)
			assert.Equal(t, [][]byte{testId, test3Id}, ids)

			return nil
		})
	})
	if t.Failed() {
		return
	}

	t.Run("Check Nuke 'n Pave Reverse", func(t *testing.T) {
		_ = db.View(func(tx *bbolt.Tx) error {
			itx := idx.WithTx(tx)
			itx2 := idx2.WithTx(tx)

			values, err := itx.Reverse(testId)
			assert.NoError(t, err)
			assert.Equal(t, []string{"pave"}, values)
			values, err = itx.Reverse(test2Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"pave"}, values)
			values, err = itx.Reverse(test3Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"pave"}, values)

			values, err = itx2.Reverse(testId)
			assert.NoError(t, err)
			assert.Equal(t, []string{"pave2"}, values)
			values, err = itx2.Reverse(test2Id)
			assert.NoError(t, err)
			assert.Empty(t, values)
			values, err = itx2.Reverse(test3Id)
			assert.NoError(t, err)
			assert.Equal(t, []string{"pave2"}, values)

			return nil
		})
	})
	if t.Failed() {
		return
	}
}