package main

import (
	"encoding/hex"
	"encoding/json"
	"io/ioutil"
	"os"
	"path"
	"strings"
	"testing"

	"github.com/nspcc-dev/neo-go/pkg/config"
	"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
	"github.com/nspcc-dev/neo-go/pkg/rpc/response/result"
	"github.com/nspcc-dev/neo-go/pkg/smartcontract/nef"
	"github.com/nspcc-dev/neo-go/pkg/util"
	"github.com/nspcc-dev/neo-go/pkg/vm"
	"github.com/stretchr/testify/require"
)

func TestComlileAndInvokeFunction(t *testing.T) {
	e := newExecutor(t, true)
	defer e.Close(t)

	// For proper nef generation.
	config.Version = "0.90.0-test"

	tmpDir := os.TempDir()
	nefName := path.Join(tmpDir, "deploy.nef")
	manifestName := path.Join(tmpDir, "deploy.manifest.json")
	e.Run(t, "neo-go", "contract", "compile",
		"--in", "testdata/deploy/main.go", // compile single file
		"--config", "testdata/deploy/neo-go.yml",
		"--out", nefName, "--manifest", manifestName)

	defer func() {
		os.Remove(nefName)
		os.Remove(manifestName)
	}()

	e.In.WriteString("one\r")
	e.Run(t, "neo-go", "contract", "deploy",
		"--rpc-endpoint", "http://"+e.RPC.Addr,
		"--wallet", validatorWallet, "--address", validatorAddr,
		"--in", nefName, "--manifest", manifestName)

	line, err := e.Out.ReadString('\n')
	require.NoError(t, err)
	line = strings.TrimSpace(strings.TrimPrefix(line, "Contract: "))
	h, err := util.Uint160DecodeStringLE(line)
	require.NoError(t, err)
	e.checkTxPersisted(t)

	e.In.WriteString("one\r")
	e.Run(t, "neo-go", "contract", "testinvokefunction",
		"--rpc-endpoint", "http://"+e.RPC.Addr,
		h.StringLE(), "getValue")

	res := new(result.Invoke)
	require.NoError(t, json.Unmarshal(e.Out.Bytes(), res))
	require.Equal(t, vm.HaltState.String(), res.State)
	require.Len(t, res.Stack, 1)
	require.Equal(t, []byte("on create|sub create"), res.Stack[0].Value())

	t.Run("Update", func(t *testing.T) {
		nefName := path.Join(tmpDir, "updated.nef")
		manifestName := path.Join(tmpDir, "updated.manifest.json")
		e.Run(t, "neo-go", "contract", "compile",
			"--config", "testdata/deploy/neo-go.yml",
			"--in", "testdata/deploy/", // compile all files in dir
			"--out", nefName, "--manifest", manifestName)

		defer func() {
			os.Remove(nefName)
			os.Remove(manifestName)
		}()

		rawNef, err := ioutil.ReadFile(nefName)
		require.NoError(t, err)
		realNef, err := nef.FileFromBytes(rawNef)
		require.NoError(t, err)
		rawManifest, err := ioutil.ReadFile(manifestName)
		require.NoError(t, err)

		e.In.WriteString("one\r")
		e.Run(t, "neo-go", "contract", "invokefunction",
			"--rpc-endpoint", "http://"+e.RPC.Addr,
			"--wallet", validatorWallet, "--address", validatorAddr,
			h.StringLE(), "update",
			"bytes:"+hex.EncodeToString(realNef.Script),
			"bytes:"+hex.EncodeToString(rawManifest),
		)
		e.checkTxPersisted(t, "Sent invocation transaction ")

		e.In.WriteString("one\r")
		e.Run(t, "neo-go", "contract", "testinvokefunction",
			"--rpc-endpoint", "http://"+e.RPC.Addr,
			hash.Hash160(realNef.Script).StringLE(), "getValue")

		res := new(result.Invoke)
		require.NoError(t, json.Unmarshal(e.Out.Bytes(), res))
		require.Equal(t, vm.HaltState.String(), res.State)
		require.Len(t, res.Stack, 1)
		require.Equal(t, []byte("on update|sub update"), res.Stack[0].Value())
	})
}

func TestCompileExamples(t *testing.T) {
	const examplePath = "../examples"
	infos, err := ioutil.ReadDir(examplePath)
	require.NoError(t, err)

	// For proper nef generation.
	config.Version = "0.90.0-test"

	tmpDir := os.TempDir()

	e := newExecutor(t, false)
	defer e.Close(t)

	for _, info := range infos {
		t.Run(info.Name(), func(t *testing.T) {
			infos, err := ioutil.ReadDir(path.Join(examplePath, info.Name()))
			require.NoError(t, err)
			require.False(t, len(infos) == 0, "detected smart contract folder with no contract in it")

			outPath := path.Join(tmpDir, info.Name()+".nef")
			manifestPath := path.Join(tmpDir, info.Name()+".manifest.json")
			defer func() {
				os.Remove(outPath)
				os.Remove(manifestPath)
			}()

			cfgName := filterFilename(infos, ".yml")
			opts := []string{
				"neo-go", "contract", "compile",
				"--in", path.Join(examplePath, info.Name()),
				"--out", outPath,
				"--manifest", manifestPath,
				"--config", path.Join(examplePath, info.Name(), cfgName),
			}
			e.Run(t, opts...)
		})
	}

	t.Run("invalid events in manifest", func(t *testing.T) {
		const dir = "./testdata/"
		for _, name := range []string{"invalid1", "invalid2", "invalid3"} {
			outPath := path.Join(tmpDir, name+".nef")
			manifestPath := path.Join(tmpDir, name+".manifest.json")
			defer func() {
				os.Remove(outPath)
				os.Remove(manifestPath)
			}()
			e.RunWithError(t, "neo-go", "contract", "compile",
				"--in", path.Join(dir, name),
				"--out", outPath,
				"--manifest", manifestPath,
				"--config", path.Join(dir, name, "invalid.yml"),
			)
		}
	})
}

func filterFilename(infos []os.FileInfo, ext string) string {
	for _, info := range infos {
		if !info.IsDir() {
			name := info.Name()
			if strings.HasSuffix(name, ext) {
				return name
			}
		}
	}
	return ""
}