// Copyright 2026 Woodpecker 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.

//go:build test

package exec

import (
	"bytes"
	"io"
	"os"
	"path/filepath"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestExecDummy(t *testing.T) {
	repoDir := t.TempDir()
	workflowPath := filepath.Join(repoDir, "workflow.yaml")
	require.NoError(t, os.WriteFile(workflowPath, []byte(`
when:
  - event: manual

steps:
  - name: build
    image: alpine
    commands:
      - echo hello
`), 0o600))

	// LineWriter writes to os.Stderr directly, so redirect the fd
	oldStderr := os.Stderr
	r, w, err := os.Pipe()
	require.NoError(t, err)
	os.Stderr = w

	t.Cleanup(func() {
		os.Stderr = oldStderr
	})

	// This is important, else it will work on your system but if run in woodpecker,
	// the exec will use the metadata the current test is running in.
	clearEnv(t)

	err = Command.Run(t.Context(), []string{
		"woodpecker-cli",
		"--backend-engine", "dummy",
		"--repo-path", repoDir,
		workflowPath,
	})
	require.NoError(t, err)

	// close write end so Read below doesn't block
	w.Close()
	var buf bytes.Buffer
	_, err = io.Copy(&buf, r)
	require.NoError(t, err)
	r.Close()
	stdout := buf.String()

	assert.Contains(
		t, stdout,
		`[build:L0:0s] StepName: build
[build:L1:0s] StepType: commands
[build:L2:0s] StepUUID: `,
	)
	assert.Contains(
		t, stdout,
		`[build:L3:0s] StepCommands:
[build:L4:0s] ------------------
[build:L5:0s] echo hello
[build:L6:0s] ------------------`,
	)

	require.NoError(t, err)
}

func clearEnv(t *testing.T) {
	t.Helper()
	osEnv := os.Environ()
	t.Cleanup(func() {
		for _, env := range osEnv {
			k, v, _ := strings.Cut(env, "=")
			_ = os.Setenv(k, v) //nolint:usetesting
		}
	})
	os.Clearenv()
}