package audita

import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"
	"runtime"
	"strings"
	"testing"
	"time"
)

func TestSubprocessRunnerSuccessArgsEnvAndValidation(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}

	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "success")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")

	recordPath := filepath.Join(t.TempDir(), "record.json")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", recordPath)

	wrapper := writeAuditaHelperWrapper(t)
	totalLLMConcurrency := 3
	proposalLLMConcurrency := 2
	validationLLMConcurrency := 2
	runner, err := NewSubprocessRunner(SubprocessRunnerConfig{
		Binary:                   wrapper,
		Timeout:                  mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv:             "OPENAI_KEY_SOURCE",
		Modules:                  []string{"glossary", "homophones", "glossary"},
		BaseURL:                  "https://openrouter.ai/api/v1",
		Model:                    "openrouter/google/gemma-4-31b-it",
		TranscriptDescription:    "Campaign Session 42",
		ConfigPath:               "/etc/audita/config.yml",
		OutputSchema:             "audita-v1",
		WorkDirRetention:         "auto",
		TotalLLMConcurrency:      &totalLLMConcurrency,
		ProposalLLMConcurrency:   &proposalLLMConcurrency,
		ValidationModel:          "openrouter/google/gemma-4-31b-it",
		ValidationLLMConcurrency: &validationLLMConcurrency,
		Report:                   true,
	})
	if err != nil {
		t.Fatalf("NewSubprocessRunner() error = %v", err)
	}

	dir := t.TempDir()
	req := PolishRequest{
		GeneratedConfigPath:  filepath.Join(dir, "audita.generated.yml"),
		MergedTranscriptPath: filepath.Join(dir, "merged.json"),
		GlossaryPath:         filepath.Join(dir, "glossary.yml"),
		OutputProcessedPath:  filepath.Join(dir, "processed.json"),
		ReportPath:           filepath.Join(dir, "audita.report.json"),
		WorkDir:              filepath.Join(dir, "artifacts", "audita-work"),
		StdoutLogPath:        filepath.Join(dir, "audita.stdout.log"),
		StderrLogPath:        filepath.Join(dir, "audita.stderr.log"),
	}
	writeAuditaTestFile(t, req.MergedTranscriptPath, `{"segments":[]}`)
	writeAuditaTestFile(t, req.GlossaryPath, "terms: []\n")

	res, err := runner.Run(context.Background(), req)
	if err != nil {
		t.Fatalf("Run() error = %v", err)
	}
	if res.ProcessedTranscriptPath != req.OutputProcessedPath {
		t.Fatalf("ProcessedTranscriptPath = %q, want %q", res.ProcessedTranscriptPath, req.OutputProcessedPath)
	}
	if res.ReportPath != req.ReportPath {
		t.Fatalf("ReportPath = %q, want %q", res.ReportPath, req.ReportPath)
	}
	if res.WorkDir != req.WorkDir {
		t.Fatalf("WorkDir = %q, want %q", res.WorkDir, req.WorkDir)
	}
	if res.InvokedBinary != wrapper {
		t.Fatalf("InvokedBinary = %q, want %q", res.InvokedBinary, wrapper)
	}
	if res.ExitCode != 0 {
		t.Fatalf("ExitCode = %d, want 0", res.ExitCode)
	}
	if res.Duration <= 0 {
		t.Fatalf("Duration = %s, want > 0", res.Duration)
	}
	assertJSONFileAudita(t, req.OutputProcessedPath)
	assertJSONFileAudita(t, req.ReportPath)
	if _, err := os.Stat(req.StdoutLogPath); err != nil {
		t.Fatalf("stdout log missing: %v", err)
	}
	if _, err := os.Stat(req.StderrLogPath); err != nil {
		t.Fatalf("stderr log missing: %v", err)
	}

	rec := readAuditaHelperRecord(t, recordPath)
	wantArgs := []string{
		"process", req.MergedTranscriptPath,
		"--glossary", req.GlossaryPath,
		"--output", req.OutputProcessedPath,
		"--work-dir", req.WorkDir,
		"--base-url", "https://openrouter.ai/api/v1",
		"--model", "openrouter/google/gemma-4-31b-it",
		"--modules", "glossary,homophones,glossary",
		"--report-json", req.ReportPath,
		"--transcript-description", "Campaign Session 42",
		"--config", "/etc/audita/config.yml",
		"--output-schema", "audita-v1",
		"--work-dir-retention", "auto",
		"--total-llm-concurrency", "3",
		"--proposal-llm-concurrency", "2",
		"--validation-model", "openrouter/google/gemma-4-31b-it",
		"--validation-llm-concurrency", "2",
	}
	if strings.Join(rec.Args, "\n") != strings.Join(wantArgs, "\n") {
		t.Fatalf("args = %#v, want %#v", rec.Args, wantArgs)
	}
	if rec.Env["AUDITA_LLM_API_KEY"] != "super-secret" {
		t.Fatalf("AUDITA_LLM_API_KEY = %q, want propagated secret", rec.Env["AUDITA_LLM_API_KEY"])
	}
	if rec.Env["AUDITA_LLM_CONCURRENCY"] != "" {
		t.Fatalf("AUDITA_LLM_CONCURRENCY = %q, want empty/omitted", rec.Env["AUDITA_LLM_CONCURRENCY"])
	}

	cfgData, err := os.ReadFile(req.GeneratedConfigPath)
	if err != nil {
		t.Fatalf("read generated config: %v", err)
	}
	if strings.Contains(string(cfgData), "super-secret") {
		t.Fatalf("generated config must not contain credential value")
	}
}

func TestSubprocessRunnerMissingConfiguredCredentialFails(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "MISSING_AUDITA_KEY",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
	})
	req := auditaReqForTest(t, false)

	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "required credential environment variable MISSING_AUDITA_KEY is not set") {
		t.Fatalf("error = %q, want missing credential guidance", err.Error())
	}
}

func TestSubprocessRunnerUnconfiguredCredentialEnvOmitsCredential(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "success")
	recordPath := filepath.Join(t.TempDir(), "record.json")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", recordPath)

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
	})
	req := auditaReqForTest(t, false)

	res, err := runner.Run(context.Background(), req)
	if err != nil {
		t.Fatalf("Run() error = %v", err)
	}
	if res.Metadata["credential_present"] != false {
		t.Fatalf("credential_present = %#v, want false", res.Metadata["credential_present"])
	}
	rec := readAuditaHelperRecord(t, recordPath)
	if rec.Env["AUDITA_LLM_API_KEY"] != "" {
		t.Fatalf("AUDITA_LLM_API_KEY = %q, want omitted/empty", rec.Env["AUDITA_LLM_API_KEY"])
	}
}

func TestSubprocessRunnerInheritsParentEnvironment(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "success")
	t.Setenv("AUDITA_INHERITED_MARKER", "inherited-from-parent")
	recordPath := filepath.Join(t.TempDir(), "record.json")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", recordPath)

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
		LLMAPIKeyEnv: "",
	})
	req := auditaReqForTest(t, false)
	if _, err := runner.Run(context.Background(), req); err != nil {
		t.Fatalf("Run() error = %v", err)
	}

	rec := readAuditaHelperRecord(t, recordPath)
	if rec.Env["AUDITA_INHERITED_MARKER"] != "inherited-from-parent" {
		t.Fatalf("AUDITA_INHERITED_MARKER = %q, want inherited-from-parent", rec.Env["AUDITA_INHERITED_MARKER"])
	}
}

func TestSubprocessRunnerOmitsModulesFlagWhenNotConfigured(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "success")
	recordPath := filepath.Join(t.TempDir(), "record.json")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", recordPath)

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "",
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
	})
	req := auditaReqForTest(t, false)
	if _, err := runner.Run(context.Background(), req); err != nil {
		t.Fatalf("Run() error = %v", err)
	}
	rec := readAuditaHelperRecord(t, recordPath)
	for i := 0; i < len(rec.Args); i++ {
		if rec.Args[i] == "--modules" {
			t.Fatalf("args contained --modules unexpectedly: %#v", rec.Args)
		}
	}
}

func TestSubprocessRunnerOmitsBaseURLAndModelFlagsWhenNotConfigured(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "success")
	recordPath := filepath.Join(t.TempDir(), "record.json")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", recordPath)

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "",
		Report:       false,
	})
	req := auditaReqForTest(t, false)
	if _, err := runner.Run(context.Background(), req); err != nil {
		t.Fatalf("Run() error = %v", err)
	}
	rec := readAuditaHelperRecord(t, recordPath)
	for i := 0; i < len(rec.Args); i++ {
		if rec.Args[i] == "--base-url" {
			t.Fatalf("args contained --base-url unexpectedly: %#v", rec.Args)
		}
		if rec.Args[i] == "--model" {
			t.Fatalf("args contained --model unexpectedly: %#v", rec.Args)
		}
	}
}

func TestSubprocessRunnerSubprocessFailure(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "fail")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", filepath.Join(t.TempDir(), "record.json"))

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "OPENAI_KEY_SOURCE",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       true,
	})
	req := auditaReqForTest(t, true)
	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "run audita process") {
		t.Fatalf("error = %q, want subprocess context", err.Error())
	}
	if !strings.Contains(err.Error(), "exit code") {
		t.Fatalf("error = %q, want exit code context", err.Error())
	}
	if !strings.Contains(err.Error(), req.StdoutLogPath) || !strings.Contains(err.Error(), req.StderrLogPath) {
		t.Fatalf("error = %q, want stdout/stderr log paths", err.Error())
	}
}

func TestSubprocessRunnerSubprocessFailureAddsStderrDescriptorHint(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "fail_bad_fd")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", filepath.Join(t.TempDir(), "record.json"))

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "OPENAI_KEY_SOURCE",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       true,
	})
	req := auditaReqForTest(t, true)
	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "hint=audita child process may have started with invalid stderr/stdout descriptors") {
		t.Fatalf("error = %q, want stderr descriptor hint", err.Error())
	}
}

func TestSubprocessRunnerMissingOutputFails(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "missing_output")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", filepath.Join(t.TempDir(), "record.json"))

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "OPENAI_KEY_SOURCE",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
	})
	req := auditaReqForTest(t, false)
	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "validate audita processed output") {
		t.Fatalf("error = %q, want output validation context", err.Error())
	}
}

func TestSubprocessRunnerInvalidOutputJSONFails(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "invalid_output")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", filepath.Join(t.TempDir(), "record.json"))

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "OPENAI_KEY_SOURCE",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
	})
	req := auditaReqForTest(t, false)
	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "parse json") {
		t.Fatalf("error = %q, want parse json context", err.Error())
	}
}

func TestSubprocessRunnerSegmentsMissingFails(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "segments_missing")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", filepath.Join(t.TempDir(), "record.json"))

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "OPENAI_KEY_SOURCE",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       false,
	})
	req := auditaReqForTest(t, false)
	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "segments") {
		t.Fatalf("error = %q, want segments validation context", err.Error())
	}
}

func TestSubprocessRunnerInvalidReportJSONFails(t *testing.T) {
	if runtime.GOOS == "windows" {
		t.Skip("helper wrapper script uses /bin/sh")
	}
	t.Setenv("GO_WANT_AUDITA_HELPER", "1")
	t.Setenv("AUDITA_HELPER_MODE", "invalid_report")
	t.Setenv("OPENAI_KEY_SOURCE", "super-secret")
	t.Setenv("AUDITA_HELPER_RECORD_PATH", filepath.Join(t.TempDir(), "record.json"))

	runner := mustAuditaRunner(t, SubprocessRunnerConfig{
		Binary:       writeAuditaHelperWrapper(t),
		Timeout:      mustParseAuditaDuration(t, "2s"),
		LLMAPIKeyEnv: "OPENAI_KEY_SOURCE",
		Modules:      []string{"glossary"},
		BaseURL:      "https://openrouter.ai/api/v1",
		Model:        "openrouter/google/gemma-4-31b-it",
		Report:       true,
	})
	req := auditaReqForTest(t, true)
	_, err := runner.Run(context.Background(), req)
	if err == nil {
		t.Fatal("expected error, got nil")
	}
	if !strings.Contains(err.Error(), "validate audita report output") {
		t.Fatalf("error = %q, want report validation context", err.Error())
	}
}

func TestSubprocessRunnerConstructorValidation(t *testing.T) {
	_, err := NewSubprocessRunnerFromConfigValues("", "3h", "AUDITA_LLM_API_KEY", []string{"glossary"}, "https://openrouter.ai/api/v1", "openrouter/google/gemma-4-31b-it", "", "", "", "", nil, nil, "", nil, true)
	if err == nil {
		t.Fatal("expected binary validation error")
	}
	_, err = NewSubprocessRunnerFromConfigValues("audita", "bad", "AUDITA_LLM_API_KEY", []string{"glossary"}, "https://openrouter.ai/api/v1", "openrouter/google/gemma-4-31b-it", "", "", "", "", nil, nil, "", nil, true)
	if err == nil {
		t.Fatal("expected timeout parse error")
	}
	_, err = NewSubprocessRunner(SubprocessRunnerConfig{
		Binary:       "audita",
		Timeout:      mustParseAuditaDuration(t, "1s"),
		LLMAPIKeyEnv: "AUDITA_LLM_API_KEY",
		Modules:      []string{"glossary"},
		BaseURL:      "://",
		Model:        "openrouter/google/gemma-4-31b-it",
	})
	if err == nil {
		t.Fatal("expected base url validation error")
	}
}

type auditaHelperRecord struct {
	Args []string          `json:"args"`
	Env  map[string]string `json:"env"`
}

func TestAuditaSubprocessHelper(t *testing.T) {
	if os.Getenv("GO_WANT_AUDITA_HELPER") != "1" {
		return
	}

	args := os.Args
	start := -1
	for i := range args {
		if args[i] == "--" {
			start = i + 1
			break
		}
	}
	if start < 0 || start >= len(args) {
		_, _ = os.Stderr.WriteString("missing -- args separator\n")
		os.Exit(2)
	}
	procArgs := args[start:]
	outPath := auditaFlagValue(procArgs, "--output")
	reportPath := auditaFlagValue(procArgs, "--report-json")
	recordPath := os.Getenv("AUDITA_HELPER_RECORD_PATH")
	if strings.TrimSpace(recordPath) != "" {
		rec := auditaHelperRecord{
			Args: procArgs,
			Env: map[string]string{
				"AUDITA_LLM_API_KEY":      os.Getenv("AUDITA_LLM_API_KEY"),
				"AUDITA_LLM_CONCURRENCY":  os.Getenv("AUDITA_LLM_CONCURRENCY"),
				"AUDITA_INHERITED_MARKER": os.Getenv("AUDITA_INHERITED_MARKER"),
			},
		}
		data, _ := json.Marshal(rec)
		_ = os.MkdirAll(filepath.Dir(recordPath), 0o755)
		_ = os.WriteFile(recordPath, data, 0o644)
	}

	mode := os.Getenv("AUDITA_HELPER_MODE")
	switch mode {
	case "success":
		writeAuditaHelperFile(outPath, `{"schema":"audita.processed.v1","segments":[]}`)
		if reportPath != "" {
			writeAuditaHelperFile(reportPath, `{"schema":"audita.report.v1","steps":[]}`)
		}
		_, _ = os.Stdout.WriteString("audita helper success stdout\n")
		_, _ = os.Stderr.WriteString("audita helper success stderr\n")
		os.Exit(0)
	case "fail":
		_, _ = os.Stderr.WriteString("audita helper failure\n")
		os.Exit(8)
	case "fail_bad_fd":
		_, _ = os.Stderr.WriteString("OSError: [Errno 9] Bad file descriptor\n")
		os.Exit(120)
	case "missing_output":
		if reportPath != "" {
			writeAuditaHelperFile(reportPath, `{"schema":"audita.report.v1","steps":[]}`)
		}
		os.Exit(0)
	case "invalid_output":
		writeAuditaHelperFile(outPath, `not-json`)
		if reportPath != "" {
			writeAuditaHelperFile(reportPath, `{"schema":"audita.report.v1","steps":[]}`)
		}
		os.Exit(0)
	case "segments_missing":
		writeAuditaHelperFile(outPath, `{"schema":"audita.processed.v1"}`)
		if reportPath != "" {
			writeAuditaHelperFile(reportPath, `{"schema":"audita.report.v1","steps":[]}`)
		}
		os.Exit(0)
	case "invalid_report":
		writeAuditaHelperFile(outPath, `{"schema":"audita.processed.v1","segments":[]}`)
		if reportPath != "" {
			writeAuditaHelperFile(reportPath, `not-json`)
		}
		os.Exit(0)
	default:
		_, _ = os.Stderr.WriteString(fmt.Sprintf("unknown helper mode %q\n", mode))
		os.Exit(2)
	}
}

func mustAuditaRunner(t *testing.T, cfg SubprocessRunnerConfig) *SubprocessRunner {
	t.Helper()
	r, err := NewSubprocessRunner(cfg)
	if err != nil {
		t.Fatalf("NewSubprocessRunner() error = %v", err)
	}
	return r
}

func auditaReqForTest(t *testing.T, withReport bool) PolishRequest {
	t.Helper()
	dir := t.TempDir()
	merged := filepath.Join(dir, "merged.json")
	glossary := filepath.Join(dir, "glossary.yml")
	writeAuditaTestFile(t, merged, `{"segments":[]}`)
	writeAuditaTestFile(t, glossary, "terms: []\n")
	req := PolishRequest{
		GeneratedConfigPath:  filepath.Join(dir, "audita.generated.yml"),
		MergedTranscriptPath: merged,
		GlossaryPath:         glossary,
		OutputProcessedPath:  filepath.Join(dir, "processed.json"),
		WorkDir:              filepath.Join(dir, "artifacts", "audita-work"),
		StdoutLogPath:        filepath.Join(dir, "audita.stdout.log"),
		StderrLogPath:        filepath.Join(dir, "audita.stderr.log"),
	}
	if withReport {
		req.ReportPath = filepath.Join(dir, "audita.report.json")
	}
	return req
}

func writeAuditaHelperWrapper(t *testing.T) string {
	t.Helper()
	exe, err := os.Executable()
	if err != nil {
		t.Fatalf("os.Executable() error = %v", err)
	}
	path := filepath.Join(t.TempDir(), "audita-helper-wrapper.sh")
	content := "#!/bin/sh\nexec \"" + exe + "\" -test.run=TestAuditaSubprocessHelper -- \"$@\"\n"
	if err := os.WriteFile(path, []byte(content), 0o755); err != nil {
		t.Fatalf("WriteFile(%q) error = %v", path, err)
	}
	return path
}

func writeAuditaTestFile(t *testing.T, path, contents string) {
	t.Helper()
	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
		t.Fatalf("MkdirAll(%q): %v", path, err)
	}
	if err := os.WriteFile(path, []byte(contents), 0o644); err != nil {
		t.Fatalf("WriteFile(%q): %v", path, err)
	}
}

func writeAuditaHelperFile(path, contents string) {
	if strings.TrimSpace(path) == "" {
		return
	}
	_ = os.MkdirAll(filepath.Dir(path), 0o755)
	_ = os.WriteFile(path, []byte(contents), 0o644)
}

func auditaFlagValue(args []string, name string) string {
	for i := 0; i < len(args)-1; i++ {
		if args[i] == name {
			return args[i+1]
		}
	}
	return ""
}

func readAuditaHelperRecord(t *testing.T, path string) auditaHelperRecord {
	t.Helper()
	data, err := os.ReadFile(path)
	if err != nil {
		t.Fatalf("ReadFile(%q): %v", path, err)
	}
	var rec auditaHelperRecord
	if err := json.Unmarshal(data, &rec); err != nil {
		t.Fatalf("json unmarshal helper record: %v", err)
	}
	return rec
}

func assertJSONFileAudita(t *testing.T, path string) {
	t.Helper()
	data, err := os.ReadFile(path)
	if err != nil {
		t.Fatalf("ReadFile(%q): %v", path, err)
	}
	var v any
	if err := json.Unmarshal(data, &v); err != nil {
		t.Fatalf("json unmarshal %q: %v", path, err)
	}
}

func mustParseAuditaDuration(t *testing.T, value string) time.Duration {
	t.Helper()
	d, err := time.ParseDuration(value)
	if err != nil {
		t.Fatalf("time.ParseDuration(%q) error = %v", value, err)
	}
	return d
}