package main

import (
	"io/ioutil"
	"os"
	"path/filepath"
	"strconv"
	"testing"

	"github.com/nspcc-dev/neo-go/pkg/config"
	"github.com/stretchr/testify/require"
	"gopkg.in/yaml.v2"
)

func TestDBRestoreDump(t *testing.T) {
	tmpDir := t.TempDir()

	loadConfig := func(t *testing.T) config.Config {
		chainPath := filepath.Join(tmpDir, "neogotestchain")
		cfg, err := config.LoadFile(filepath.Join("..", "config", "protocol.unit_testnet.yml"))
		require.NoError(t, err, "could not load config")
		cfg.ApplicationConfiguration.DBConfiguration.Type = "leveldb"
		cfg.ApplicationConfiguration.DBConfiguration.LevelDBOptions.DataDirectoryPath = chainPath
		return cfg
	}

	cfg := loadConfig(t)
	out, err := yaml.Marshal(cfg)
	require.NoError(t, err)

	cfgPath := filepath.Join(tmpDir, "protocol.unit_testnet.yml")
	require.NoError(t, ioutil.WriteFile(cfgPath, out, os.ModePerm))

	// generated via `go run ./scripts/gendump/main.go --out ./cli/testdata/chain50x2.acc --blocks 50 --txs 2`
	const inDump = "./testdata/chain50x2.acc"
	e := newExecutor(t, false)

	stateDump := filepath.Join(tmpDir, "neogo.teststate")
	baseArgs := []string{"neo-go", "db", "restore", "--unittest",
		"--config-path", tmpDir, "--in", inDump, "--dump", stateDump}

	// First 15 blocks.
	e.Run(t, append(baseArgs, "--count", "15")...)

	// Big count.
	e.RunWithError(t, append(baseArgs, "--count", "1000")...)

	// Continue 15..25
	e.Run(t, append(baseArgs, "--count", "10")...)

	// Continue till end.
	e.Run(t, baseArgs...)

	// Dump and compare.
	dumpPath := filepath.Join(tmpDir, "testdump.acc")

	t.Run("missing config", func(t *testing.T) {
		e.RunWithError(t, "neo-go", "db", "dump", "--privnet",
			"--config-path", tmpDir, "--out", dumpPath)
	})
	t.Run("bad logger config", func(t *testing.T) {
		badConfigDir := t.TempDir()
		logfile := filepath.Join(badConfigDir, "logdir")
		require.NoError(t, os.WriteFile(logfile, []byte{1, 2, 3}, os.ModePerm))
		cfg = loadConfig(t)
		cfg.ApplicationConfiguration.LogPath = filepath.Join(logfile, "file.log")
		out, err = yaml.Marshal(cfg)
		require.NoError(t, err)

		cfgPath = filepath.Join(badConfigDir, "protocol.unit_testnet.yml")
		require.NoError(t, ioutil.WriteFile(cfgPath, out, os.ModePerm))

		e.RunWithError(t, "neo-go", "db", "dump", "--unittest",
			"--config-path", badConfigDir, "--out", dumpPath)
	})
	t.Run("bad storage config", func(t *testing.T) {
		badConfigDir := t.TempDir()
		logfile := filepath.Join(badConfigDir, "logdir")
		require.NoError(t, os.WriteFile(logfile, []byte{1, 2, 3}, os.ModePerm))
		cfg = loadConfig(t)
		cfg.ApplicationConfiguration.DBConfiguration.Type = ""
		out, err = yaml.Marshal(cfg)
		require.NoError(t, err)

		cfgPath = filepath.Join(badConfigDir, "protocol.unit_testnet.yml")
		require.NoError(t, ioutil.WriteFile(cfgPath, out, os.ModePerm))

		e.RunWithError(t, "neo-go", "db", "dump", "--unittest",
			"--config-path", badConfigDir, "--out", dumpPath)
	})

	baseCmd := []string{"neo-go", "db", "dump", "--unittest",
		"--config-path", tmpDir, "--out", dumpPath}

	t.Run("invalid start/count", func(t *testing.T) {
		e.RunWithError(t, append(baseCmd, "--start", "5", "--count", strconv.Itoa(50-5+1+1))...)
	})

	e.Run(t, baseCmd...)

	d1, err := ioutil.ReadFile(inDump)
	require.NoError(t, err)
	d2, err := ioutil.ReadFile(dumpPath)
	require.NoError(t, err)
	require.Equal(t, d1, d2, "dumps differ")
}