package test

import (
	"encoding/json"
	"fmt"
	"github.com/crawlab-team/crawlab/vcs"
	"github.com/go-git/go-billy/v5/memfs"
	"github.com/go-git/go-git/v5"
	"github.com/go-git/go-git/v5/config"
	"github.com/go-git/go-git/v5/storage/memory"
	"github.com/stretchr/testify/require"
	"os"
	"path"
	"testing"
	"time"
)

func TestNewGitClient_Existing(t *testing.T) {
	var err error
	T.Setup(t)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.LocalRepo.GetPath()),
	)
	require.Nil(t, err)
	require.NotEmpty(t, c.GetRepository())
}

func TestNewGitClient_Fs(t *testing.T) {
	var err error
	T.Setup(t)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.FsRepoPath),
		vcs.WithRemoteUrl(T.RemoteRepoPath),
	)
	require.Nil(t, err)
	require.NotEmpty(t, c.GetRepository())
	require.Equal(t, T.RemoteRepoPath, c.GetRemoteUrl())
}

func TestNewGitClient_Mem(t *testing.T) {
	var err error
	T.Setup(t)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.MemRepoPath),
		vcs.WithRemoteUrl(T.RemoteRepoPath),
		vcs.WithIsMem(),
	)
	require.Nil(t, err)
	require.NotEmpty(t, c.GetRepository())
}

func TestGitClient_CommitAllAndCheckoutBranch(t *testing.T) {
	var err error
	T.Setup(t)

	// commit
	filePath := path.Join(T.LocalRepoPath, T.TestFileName)
	err = os.WriteFile(filePath, []byte(T.TestFileContent), os.FileMode(0766))
	require.Nil(t, err)
	err = T.LocalRepo.CommitAll(T.TestCommitMessage)
	require.Nil(t, err)

	// checkout branch
	err = T.LocalRepo.CheckoutBranch(T.TestBranchName)
	require.Nil(t, err)

	// validate
	branch, err := T.LocalRepo.GetCurrentBranch()
	require.Nil(t, err)
	require.Equal(t, T.TestBranchName, branch)

	// dispose
	err = T.LocalRepo.Dispose()
	require.Nil(t, err)
}

func TestGitClient_Push(t *testing.T) {
	var err error
	T.Setup(t)

	// commit
	filePath := path.Join(T.LocalRepoPath, T.TestFileName)
	err = os.WriteFile(filePath, []byte(T.TestFileContent), os.FileMode(0766))
	require.Nil(t, err)
	err = T.LocalRepo.CommitAll(T.TestCommitMessage)
	require.Nil(t, err)

	// push
	err = T.LocalRepo.Push()
	require.Nil(t, err)
}

func TestGitClient_Reset(t *testing.T) {
	var err error
	T.Setup(t)

	// file
	filePath := path.Join(T.LocalRepoPath, T.TestFileName)
	err = os.WriteFile(filePath, []byte(T.TestFileContent), os.FileMode(0766))
	require.Nil(t, err)

	// reset
	err = T.LocalRepo.Reset(vcs.WithMode(git.HardReset)) // git reset --hard
	require.Nil(t, err)
	_, err = os.Stat(filePath)
	require.IsType(t, &os.PathError{}, err)
}

func TestGitClient_GetLogs(t *testing.T) {
	var err error
	T.Setup(t)

	// file
	filePath := path.Join(T.LocalRepoPath, T.TestFileName)
	err = os.WriteFile(filePath, []byte(T.TestFileContent), os.FileMode(0766))
	require.Nil(t, err)
	err = T.LocalRepo.CommitAll(T.TestCommitMessage)
	require.Nil(t, err)

	// get logs
	logs, err := T.LocalRepo.GetLogs()
	require.Nil(t, err)
	require.Greater(t, len(logs), 0)
	require.Equal(t, T.TestCommitMessage, logs[0].Msg)
}

func TestGitClient_InitWithHttpAuth(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)

	// create new git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath),
		vcs.WithRemoteUrl(cred.TestRepoHttpUrl),
		vcs.WithAuthType(vcs.GitAuthTypeHTTP),
		vcs.WithUsername(cred.Username),
		vcs.WithPassword(cred.Password),
	)
	require.Nil(t, err)
	require.Equal(t, cred.TestRepoHttpUrl, c.GetRemoteUrl())
	require.Equal(t, vcs.GitAuthTypeHTTP, c.GetAuthType())
	require.Equal(t, cred.Username, c.GetUsername())

	// pull
	err = c.Pull()
	require.Nil(t, err)

	// validate
	files, err := os.ReadDir(T.AuthRepoPath)
	require.Greater(t, len(files), 0)
	data, err = os.ReadFile(path.Join(T.AuthRepoPath, "README.md"))
	require.Nil(t, err)

	// dispose
	err = c.Dispose()
	require.Nil(t, err)
}

func TestGitClient_MoveBranch(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)

	// create new git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath),
		vcs.WithRemoteUrl(cred.TestRepoHttpUrl),
		vcs.WithAuthType(vcs.GitAuthTypeHTTP),
		vcs.WithUsername(cred.Username),
		vcs.WithPassword(cred.Password),
	)
	require.Nil(t, err)

	// pull
	err = c.Pull(vcs.WithBranchNamePull(vcs.GitBranchNameMain))
	require.Nil(t, err)

	// move branch
	err = c.MoveBranch(vcs.GitBranchNameMaster, vcs.GitBranchNameMain)
	require.Nil(t, err)

	// validate
	var branchNames []string
	branches, err := c.GetBranches()
	require.Nil(t, err)
	for _, b := range branches {
		branchNames = append(branchNames, b.Name)
	}
	require.Contains(t, branchNames, vcs.GitBranchNameMain)
	require.NotContains(t, branchNames, vcs.GitBranchNameMaster)
}

func TestGitClient_PullWithHttpAuth(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)

	// create new git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath),
		vcs.WithRemoteUrl(cred.TestRepoHttpUrl),
		vcs.WithAuthType(vcs.GitAuthTypeHTTP),
		vcs.WithUsername(cred.Username),
		vcs.WithPassword(cred.Password),
	)
	require.Nil(t, err)

	// create remote
	r, err := c.CreateRemote(&config.RemoteConfig{
		Name: vcs.GitRemoteNameUpstream,
		URLs: []string{cred.TestRepoHttpUrl},
	})
	require.Nil(t, err)
	require.NotNil(t, r)

	// pull
	err = c.Pull(
		vcs.WithRemoteNamePull(vcs.GitRemoteNameUpstream),
		vcs.WithBranchNamePull(vcs.GitBranchNameMain),
	)
	require.Nil(t, err)

	// validate
	files, err := os.ReadDir(T.AuthRepoPath)
	require.Greater(t, len(files), 0)
	data, err = os.ReadFile(path.Join(T.AuthRepoPath, "README.md"))
	require.Nil(t, err)

	// dispose
	err = c.Dispose()
	require.Nil(t, err)
}

func TestGitClient_CheckoutRemoteBranchWithHttpAuth(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)

	// create new git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath),
		vcs.WithRemoteUrl(cred.TestRepoMultiBranchUrl),
		vcs.WithAuthType(vcs.GitAuthTypeHTTP),
		vcs.WithUsername(cred.Username),
		vcs.WithPassword(cred.Password),
	)
	require.Nil(t, err)

	// pull
	err = c.Pull(
		vcs.WithRemoteNamePull(vcs.GitRemoteNameOrigin),
		vcs.WithBranchNamePull(vcs.GitBranchNameMain),
	)
	require.Nil(t, err)

	// validate
	_, err = os.ReadFile(path.Join(T.AuthRepoPath, "MAIN"))
	require.Nil(t, err)

	// checkout remote branch
	err = c.CheckoutBranchWithRemote(vcs.GitBranchNameRelease, vcs.GitRemoteNameOrigin, nil)
	require.Nil(t, err)

	// validate
	_, err = os.ReadFile(path.Join(T.AuthRepoPath, "RELEASE"))
	require.Nil(t, err)

	// checkout remote branch
	err = c.CheckoutBranchWithRemote(vcs.GitBranchNameDevelop, vcs.GitRemoteNameOrigin, nil)
	require.Nil(t, err)

	// validate
	_, err = os.ReadFile(path.Join(T.AuthRepoPath, "DEVELOP"))
	require.Nil(t, err)

	// dispose
	err = c.Dispose()
	require.Nil(t, err)
}

func TestGitClient_InitWithSshAuth_PrivateKey(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)
	fmt.Println(cred.SshUsername)
	fmt.Println(cred.SshPassword)
	fmt.Println(cred.TestRepoSshUrl)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath),
		vcs.WithRemoteUrl(cred.TestRepoSshUrl),
		vcs.WithAuthType(vcs.GitAuthTypeSSH),
		vcs.WithUsername(cred.SshUsername),
		vcs.WithPassword(cred.SshPassword),
		vcs.WithPrivateKey(cred.PrivateKey),
	)
	require.Nil(t, err)
	require.Equal(t, cred.TestRepoSshUrl, c.GetRemoteUrl())
	require.Equal(t, vcs.GitAuthTypeSSH, c.GetAuthType())
	require.Equal(t, cred.SshUsername, c.GetUsername())
	fmt.Println(c.GetAuthType())

	// pull
	err = c.Pull()
	require.Nil(t, err)

	// validate
	files, err := os.ReadDir(T.AuthRepoPath)
	require.Greater(t, len(files), 0)
	data, err = os.ReadFile(path.Join(T.AuthRepoPath, "README.md"))
	require.Nil(t, err)

	// dispose
	err = c.Dispose()
	require.Nil(t, err)
}

func TestGitClient_InitWithSshAuth_PrivateKeyPath(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath),
		vcs.WithRemoteUrl(cred.TestRepoSshUrl),
		vcs.WithAuthType(vcs.GitAuthTypeSSH),
		vcs.WithUsername(cred.SshUsername),
		vcs.WithPassword(cred.SshPassword),
		vcs.WithPrivateKeyPath(cred.PrivateKeyPath),
	)
	require.Nil(t, err)
	require.Equal(t, cred.TestRepoSshUrl, c.GetRemoteUrl())
	require.Equal(t, vcs.GitAuthTypeSSH, c.GetAuthType())
	require.Equal(t, cred.SshUsername, c.GetUsername())
	require.Equal(t, cred.PrivateKeyPath, c.GetPrivateKeyPath())

	// pull
	err = c.Pull()
	require.Nil(t, err)

	// validate
	files, err := os.ReadDir(T.AuthRepoPath)
	require.Greater(t, len(files), 0)
	data, err = os.ReadFile(path.Join(T.AuthRepoPath, "README.md"))
	require.Nil(t, err)
}

func TestGitClient_Dispose_Fs(t *testing.T) {
	var err error
	T.Setup(t)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.FsRepoPath),
		vcs.WithRemoteUrl(T.RemoteRepoPath),
	)
	require.Nil(t, err)

	// path exists
	require.DirExists(t, T.FsRepoPath)

	// dispose
	err = c.Dispose()
	require.Nil(t, err)

	// validate
	_, err = os.Stat(T.FsRepoPath)
	require.IsType(t, &os.PathError{}, err)
}

func TestGitClient_Dispose_Mem(t *testing.T) {
	var err error
	T.Setup(t)

	// git client
	c, err := vcs.NewGitClient(
		vcs.WithPath(T.MemRepoPath),
		vcs.WithRemoteUrl(T.RemoteRepoPath),
		vcs.WithIsMem(),
	)
	require.Nil(t, err)

	// mem map exists
	stItem, ok := vcs.GitMemStorages.Load(T.MemRepoPath)
	require.True(t, ok)
	require.IsType(t, &memory.Storage{}, stItem)
	fsItem, ok := vcs.GitMemFileSystem.Load(T.MemRepoPath)
	require.True(t, ok)
	require.IsType(t, memfs.New(), fsItem)

	// dispose
	err = c.Dispose()
	require.Nil(t, err)

	// validate
	_, ok = vcs.GitMemStorages.Load("./tmp/test_repo")
	require.False(t, ok)
	_, ok = vcs.GitMemFileSystem.Load("./tmp/test_repo")
	require.False(t, ok)
}

func TestGitClient_IsRemoteChanged(t *testing.T) {
	var err error
	T.Setup(t)

	// get credentials
	var cred Credential
	data, err := os.ReadFile("credentials.json")
	require.Nil(t, err)
	err = json.Unmarshal(data, &cred)
	require.Nil(t, err)

	// git client
	c1, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath1),
		vcs.WithRemoteUrl(cred.TestRepoSshUrl),
		vcs.WithAuthType(vcs.GitAuthTypeSSH),
		vcs.WithUsername(cred.SshUsername),
		vcs.WithPassword(cred.SshPassword),
		vcs.WithPrivateKeyPath(cred.PrivateKeyPath),
	)
	require.Nil(t, err)
	err = c1.Pull()
	require.Nil(t, err)
	err = c1.CheckoutBranch("main")
	require.Nil(t, err)

	// git client (for validation)
	c2, err := vcs.NewGitClient(
		vcs.WithPath(T.AuthRepoPath2),
		vcs.WithRemoteUrl(cred.TestRepoSshUrl),
		vcs.WithAuthType(vcs.GitAuthTypeSSH),
		vcs.WithUsername(cred.SshUsername),
		vcs.WithPassword(cred.SshPassword),
		vcs.WithPrivateKeyPath(cred.PrivateKeyPath),
	)
	require.Nil(t, err)
	err = c2.Pull()
	require.Nil(t, err)
	err = c2.CheckoutBranch("main")
	require.Nil(t, err)

	// commit and push
	testFileName := fmt.Sprintf("test-%d.txt", time.Now().Unix())
	filePath := path.Join(c1.GetPath(), testFileName)
	err = os.WriteFile(filePath, []byte(T.TestFileContent), os.FileMode(0766))
	require.Nil(t, err)
	err = c1.Add(testFileName)
	require.Nil(t, err)
	err = c1.CommitAll(fmt.Sprintf("added %s", testFileName))
	require.Nil(t, err)
	err = c1.Push()
	require.Nil(t, err)

	// validate
	ok, err := c2.IsRemoteChanged()
	require.Nil(t, err)
	require.True(t, ok)

	// pull and validate
	err = c2.Pull()
	require.Nil(t, err)
	ok, err = c2.IsRemoteChanged()
	require.Nil(t, err)
	require.False(t, ok)
}