package ready

import (
	"bytes"
	"io/ioutil"
	"net/http"
	"regexp"
	"testing"

	"github.com/cli/cli/context"
	"github.com/cli/cli/git"
	"github.com/cli/cli/internal/config"
	"github.com/cli/cli/internal/ghrepo"
	"github.com/cli/cli/pkg/cmdutil"
	"github.com/cli/cli/pkg/httpmock"
	"github.com/cli/cli/pkg/iostreams"
	"github.com/cli/cli/test"
	"github.com/google/shlex"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func Test_NewCmdReady(t *testing.T) {
	tests := []struct {
		name    string
		args    string
		isTTY   bool
		want    ReadyOptions
		wantErr string
	}{
		{
			name:  "number argument",
			args:  "123",
			isTTY: true,
			want: ReadyOptions{
				SelectorArg: "123",
			},
		},
		{
			name:  "no argument",
			args:  "",
			isTTY: true,
			want: ReadyOptions{
				SelectorArg: "",
			},
		},
		{
			name:    "no argument with --repo override",
			args:    "-R owner/repo",
			isTTY:   true,
			wantErr: "argument required when using the --repo flag",
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			io, _, _, _ := iostreams.Test()
			io.SetStdoutTTY(tt.isTTY)
			io.SetStdinTTY(tt.isTTY)
			io.SetStderrTTY(tt.isTTY)

			f := &cmdutil.Factory{
				IOStreams: io,
			}

			var opts *ReadyOptions
			cmd := NewCmdReady(f, func(o *ReadyOptions) error {
				opts = o
				return nil
			})
			cmd.PersistentFlags().StringP("repo", "R", "", "")

			argv, err := shlex.Split(tt.args)
			require.NoError(t, err)
			cmd.SetArgs(argv)

			cmd.SetIn(&bytes.Buffer{})
			cmd.SetOut(ioutil.Discard)
			cmd.SetErr(ioutil.Discard)

			_, err = cmd.ExecuteC()
			if tt.wantErr != "" {
				require.EqualError(t, err, tt.wantErr)
				return
			} else {
				require.NoError(t, err)
			}

			assert.Equal(t, tt.want.SelectorArg, opts.SelectorArg)
		})
	}
}

func runCommand(rt http.RoundTripper, isTTY bool, cli string) (*test.CmdOut, error) {
	io, _, stdout, stderr := iostreams.Test()
	io.SetStdoutTTY(isTTY)
	io.SetStdinTTY(isTTY)
	io.SetStderrTTY(isTTY)

	factory := &cmdutil.Factory{
		IOStreams: io,
		HttpClient: func() (*http.Client, error) {
			return &http.Client{Transport: rt}, nil
		},
		Config: func() (config.Config, error) {
			return config.NewBlankConfig(), nil
		},
		BaseRepo: func() (ghrepo.Interface, error) {
			return ghrepo.New("OWNER", "REPO"), nil
		},
		Remotes: func() (context.Remotes, error) {
			return context.Remotes{
				{
					Remote: &git.Remote{Name: "origin"},
					Repo:   ghrepo.New("OWNER", "REPO"),
				},
			}, nil
		},
		Branch: func() (string, error) {
			return "main", nil
		},
	}

	cmd := NewCmdReady(factory, nil)

	argv, err := shlex.Split(cli)
	if err != nil {
		return nil, err
	}
	cmd.SetArgs(argv)

	cmd.SetIn(&bytes.Buffer{})
	cmd.SetOut(ioutil.Discard)
	cmd.SetErr(ioutil.Discard)

	_, err = cmd.ExecuteC()
	return &test.CmdOut{
		OutBuf: stdout,
		ErrBuf: stderr,
	}, err
}

func TestPRReady(t *testing.T) {
	http := &httpmock.Registry{}
	defer http.Verify(t)

	http.StubResponse(200, bytes.NewBufferString(`
	{ "data": { "repository": {
		"pullRequest": { "number": 444, "closed": false, "isDraft": true}
	} } }
	`))
	http.StubResponse(200, bytes.NewBufferString(`{"id": "THE-ID"}`))

	output, err := runCommand(http, true, "444")
	if err != nil {
		t.Fatalf("error running command `pr ready`: %v", err)
	}

	r := regexp.MustCompile(`Pull request #444 is marked as "ready for review"`)

	if !r.MatchString(output.Stderr()) {
		t.Fatalf("output did not match regexp /%s/\n> output\n%q\n", r, output.Stderr())
	}
}

func TestPRReady_alreadyReady(t *testing.T) {
	http := &httpmock.Registry{}
	defer http.Verify(t)

	http.StubResponse(200, bytes.NewBufferString(`
	{ "data": { "repository": {
		"pullRequest": { "number": 445, "closed": false, "isDraft": false}
	} } }
	`))

	output, err := runCommand(http, true, "445")
	if err != nil {
		t.Fatalf("error running command `pr ready`: %v", err)
	}

	r := regexp.MustCompile(`Pull request #445 is already "ready for review"`)

	if !r.MatchString(output.Stderr()) {
		t.Fatalf("output did not match regexp /%s/\n> output\n%q\n", r, output.Stderr())
	}
}

func TestPRReady_closed(t *testing.T) {
	http := &httpmock.Registry{}
	defer http.Verify(t)

	http.StubResponse(200, bytes.NewBufferString(`
	{ "data": { "repository": {
		"pullRequest": { "number": 446, "closed": true, "isDraft": true}
	} } }
	`))

	output, err := runCommand(http, true, "446")
	if err == nil {
		t.Fatalf("expected an error running command `pr ready` on a review that is closed!: %v", err)
	}

	r := regexp.MustCompile(`Pull request #446 is closed. Only draft pull requests can be marked as "ready for review"`)

	if !r.MatchString(output.Stderr()) {
		t.Fatalf("output did not match regexp /%s/\n> output\n%q\n", r, output.Stderr())
	}
}