package app

import (
	"bytes"
	"os"
	"path/filepath"
	"strings"
	"testing"
	"time"
)

func TestRunBuildTopPackageUsesCachedCompiledOutputs(t *testing.T) {
	root := t.TempDir()
	mkdirAll(t, filepath.Join(root, "build"))
	mkdirAll(t, filepath.Join(root, ".cache", "2da"))
	mkdirAll(t, filepath.Join(root, "topdata", "assets", "gui"))
	mkdirAll(t, filepath.Join(root, "topdata", "data", "repadjust"))

	writeFile(t, filepath.Join(root, "nwn-tool.json"), `{
  "module": {
    "name": "Test Module",
    "resref": "test_module"
  },
  "topdata": {
    "source": "topdata",
    "build": ".cache",
    "package_hak": "sow_top.hak",
    "package_tlk": "sow_tlk.tlk"
  }
}`+"\n")
	writeFile(t, filepath.Join(root, ".cache", "2da", "repadjust.2da"), "2DA V2.0\n\n      Label\n0     TEST_LABEL\n")
	writeFile(t, filepath.Join(root, "build", "sow_tlk.tlk"), "compiled tlk")
	writeFile(t, filepath.Join(root, "topdata", "assets", "gui", "testicon.png"), "icon-data")
	writeFile(t, filepath.Join(root, "topdata", "data", "repadjust", "base.json"), "{ this is intentionally invalid json }\n")

	sourceTime := time.Now().Add(-2 * time.Hour)
	outputTime := time.Now().Add(-1 * time.Hour)
	setFileTime(t, filepath.Join(root, "topdata", "assets", "gui", "testicon.png"), sourceTime)
	setFileTime(t, filepath.Join(root, "topdata", "data", "repadjust", "base.json"), sourceTime)
	setFileTime(t, filepath.Join(root, ".cache", "2da", "repadjust.2da"), outputTime)
	setFileTime(t, filepath.Join(root, "build", "sow_tlk.tlk"), outputTime)

	var stdout bytes.Buffer
	ctx := context{
		stdout: &stdout,
		stderr: &bytes.Buffer{},
		cwd:    root,
		args:   []string{"build-top-package"},
	}

	if err := runBuildTopPackage(ctx); err != nil {
		t.Fatalf("runBuildTopPackage failed: %v", err)
	}
	if !strings.Contains(stdout.String(), "top package hak:") {
		t.Fatalf("expected build-top-package output, got %q", stdout.String())
	}
	if _, err := os.Stat(filepath.Join(root, "build", "sow_top.hak")); err != nil {
		t.Fatalf("expected packaged hak output: %v", err)
	}
}

func mkdirAll(t *testing.T, path string) {
	t.Helper()
	if err := os.MkdirAll(path, 0o755); err != nil {
		t.Fatalf("mkdir %s: %v", path, err)
	}
}

func writeFile(t *testing.T, path, content string) {
	t.Helper()
	if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
		t.Fatalf("write %s: %v", path, err)
	}
}

func setFileTime(t *testing.T, path string, modTime time.Time) {
	t.Helper()
	if err := os.Chtimes(path, modTime, modTime); err != nil {
		t.Fatalf("set file time %s: %v", path, err)
	}
}