/*
Copyright 2023 The Dapr Authors
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package postgres

import (
	"context"
	"fmt"
	"os"
	"testing"
	"time"

	"github.com/stretchr/testify/assert"

	"github.com/dapr/components-contrib/bindings"
	"github.com/dapr/components-contrib/metadata"
	"github.com/dapr/kit/logger"
)

const (
	testTableDDL = `CREATE TABLE IF NOT EXISTS foo (
		id bigint NOT NULL,
		v1 character varying(50) NOT NULL,
		ts TIMESTAMP)`
	testInsert = "INSERT INTO foo (id, v1, ts) VALUES (%d, 'test-%d', '%v')"
	testDelete = "DELETE FROM foo"
	testUpdate = "UPDATE foo SET ts = '%v' WHERE id = %d"
	testSelect = "SELECT * FROM foo WHERE id < 3"
)

func TestOperations(t *testing.T) {
	t.Parallel()
	t.Run("Get operation list", func(t *testing.T) {
		b := NewPostgres(nil)
		assert.NotNil(t, b)
		l := b.Operations()
		assert.Equal(t, 3, len(l))
	})
}

// SETUP TESTS
// 1. `createdb daprtest`
// 2. `createuser daprtest`
// 3. `psql=# grant all privileges on database daprtest to daprtest;``
// 4. `export POSTGRES_TEST_CONN_URL="postgres://daprtest@localhost:5432/daprtest"``
// 5. `go test -v -count=1 ./bindings/postgres -run ^TestPostgresIntegration`

func TestPostgresIntegration(t *testing.T) {
	url := os.Getenv("POSTGRES_TEST_CONN_URL")
	if url == "" {
		t.SkipNow()
	}

	// live DB test
	b := NewPostgres(logger.NewLogger("test")).(*Postgres)
	m := bindings.Metadata{Base: metadata.Base{Properties: map[string]string{"connectionString": url}}}
	if err := b.Init(context.Background(), m); err != nil {
		t.Fatal(err)
	}

	// create table
	req := &bindings.InvokeRequest{
		Operation: execOperation,
		Metadata:  map[string]string{commandSQLKey: testTableDDL},
	}
	ctx := context.TODO()
	t.Run("Invoke create table", func(t *testing.T) {
		res, err := b.Invoke(ctx, req)
		assertResponse(t, res, err)
	})

	t.Run("Invoke delete", func(t *testing.T) {
		req.Metadata[commandSQLKey] = testDelete
		res, err := b.Invoke(ctx, req)
		assertResponse(t, res, err)
	})

	t.Run("Invoke insert", func(t *testing.T) {
		for i := 0; i < 10; i++ {
			req.Metadata[commandSQLKey] = fmt.Sprintf(testInsert, i, i, time.Now().Format(time.RFC3339))
			res, err := b.Invoke(ctx, req)
			assertResponse(t, res, err)
		}
	})

	t.Run("Invoke update", func(t *testing.T) {
		for i := 0; i < 10; i++ {
			req.Metadata[commandSQLKey] = fmt.Sprintf(testUpdate, time.Now().Format(time.RFC3339), i)
			res, err := b.Invoke(ctx, req)
			assertResponse(t, res, err)
		}
	})

	t.Run("Invoke select", func(t *testing.T) {
		req.Operation = queryOperation
		req.Metadata[commandSQLKey] = testSelect
		res, err := b.Invoke(ctx, req)
		assertResponse(t, res, err)
	})

	t.Run("Invoke delete", func(t *testing.T) {
		req.Operation = execOperation
		req.Metadata[commandSQLKey] = testDelete
		req.Data = nil
		res, err := b.Invoke(ctx, req)
		assertResponse(t, res, err)
	})

	t.Run("Invoke close", func(t *testing.T) {
		req.Operation = closeOperation
		req.Metadata = nil
		req.Data = nil
		_, err := b.Invoke(ctx, req)
		assert.NoError(t, err)
	})

	t.Run("Close", func(t *testing.T) {
		err := b.Close()
		assert.NoError(t, err, "expected no error closing output binding")
	})
}

func assertResponse(t *testing.T, res *bindings.InvokeResponse, err error) {
	assert.NoError(t, err)
	assert.NotNil(t, res)
	assert.NotNil(t, res.Metadata)
}
