// tools/tests/ci_agent_bridge_test.go
//
// Unit tests for ci-agent-bridge CLI.
// Covers patch application, branch reverts, artifact summarization, and podman runner.
//
// Run with:
//   go test ./tools/tests -v -race -cover

package tests

import (
	"encoding/json"
	"os"
	"path/filepath"
	"testing"

	// Import the bridge for direct function testing.
	// Adjust path if your project structure differs.
	bridge "github.com/fraktal/mev-beta/tools/bridge"
)

// helper: create temporary directory with dummy artifact files
func createDummyArtifacts(t *testing.T) string {
	dir, err := os.MkdirTemp("", "artifacts")
	if err != nil {
		t.Fatalf("failed to create temp dir: %v", err)
	}

	// write 2 dummy files
	if err := os.WriteFile(filepath.Join(dir, "a.log"), []byte("log-data-123"), 0644); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(dir, "b.txt"), []byte("text-data-456"), 0644); err != nil {
		t.Fatal(err)
	}
	return dir
}

func TestSummarizeArtifacts(t *testing.T) {
	dir := createDummyArtifacts(t)
	defer os.RemoveAll(dir)

	outFile := filepath.Join(dir, "summary.json")
	cfg := bridge.SummarizeConfig{
		ArtifactsDir: dir,
		OutputFile:   outFile,
	}
	if err := bridge.SummarizeArtifacts(cfg); err != nil {
		t.Fatalf("summarize failed: %v", err)
	}

	// verify JSON exists
	data, err := os.ReadFile(outFile)
	if err != nil {
		t.Fatalf("failed to read summary.json: %v", err)
	}

	var parsed bridge.SummarizeResult
	if err := json.Unmarshal(data, &parsed); err != nil {
		t.Fatalf("failed to unmarshal json: %v", err)
	}

	if len(parsed.Files) < 2 {
		t.Errorf("expected >=2 files, got %d", len(parsed.Files))
	}
	if parsed.Timestamp.IsZero() {
		t.Errorf("expected timestamp set")
	}

	// verify ZIP archive created
	if _, err := os.Stat(filepath.Join(dir, "summary.zip")); os.IsNotExist(err) {
		t.Errorf("expected summary.zip archive, not found")
	}
}

func TestApplyPatch_MissingArgs(t *testing.T) {
	op := bridge.PatchOperation{}
	err := bridge.ApplyPatch(op)
	if err == nil {
		t.Fatal("expected error when patchfile/branch missing")
	}
}

func TestRevertBranch_MissingBranch(t *testing.T) {
	err := bridge.RevertBranch("")
	if err == nil {
		t.Fatal("expected error when branch missing")
	}
}

// Integration-like test with mock podman-compose
func TestRunPodmanCompose(t *testing.T) {
	// simulate podman-compose using echo
	tmpPath := filepath.Join(os.TempDir(), "podman-compose")
	if err := os.WriteFile(tmpPath, []byte("#!/bin/sh\necho podman-compose-run"), 0755); err != nil {
		t.Fatal(err)
	}
	defer os.Remove(tmpPath)

	// put tmpPath at beginning of PATH
	oldPath := os.Getenv("PATH")
	os.Setenv("PATH", filepath.Dir(tmpPath)+":"+oldPath)
	defer os.Setenv("PATH", oldPath)

	err := bridge.RunPodmanCompose()
	if err != nil {
		t.Fatalf("expected mock podman-compose to succeed, got err: %v", err)
	}
}

// TestZipDir ensures ZIP creation works standalone
func TestZipDir(t *testing.T) {
	dir := createDummyArtifacts(t)
	defer os.RemoveAll(dir)

	dest := filepath.Join(dir, "out.zip")
	if err := bridge.ZipDir(dir, dest); err != nil {
		t.Fatalf("zipdir failed: %v", err)
	}

	info, err := os.Stat(dest)
	if err != nil {
		t.Fatalf("zip file not found: %v", err)
	}
	if info.Size() == 0 {
		t.Errorf("zip file is empty")
	}
}

// Benchmark for artifact summarization performance
func BenchmarkSummarizeArtifacts(b *testing.B) {
	dir := createDummyArtifacts(nil)
	defer os.RemoveAll(dir)

	cfg := bridge.SummarizeConfig{
		ArtifactsDir: dir,
		OutputFile:   filepath.Join(dir, "summary.json"),
	}

	for i := 0; i < b.N; i++ {
		if err := bridge.SummarizeArtifacts(cfg); err != nil {
			b.Fatal(err)
		}
	}
}

// Example usage doc test
func ExampleSummarizeArtifacts() {
	// This example is for documentation purposes only and doesn't produce output in tests
	// because it uses temporary directories with random names.
}