package postimport

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

func TestNormalizeLegacyTime(t *testing.T) {
	got, err := normalizeLegacyTime("2026-01-13 01:25:27.486491+00")
	if err != nil {
		t.Fatal(err)
	}
	if got != "2026-01-13T01:25:27Z" {
		t.Fatalf("normalized time = %q", got)
	}
}

func TestArticleToPostFallbackSlugAndBody(t *testing.T) {
	root := t.TempDir()
	postsDir := filepath.Join(root, defaultPostsDir)
	if err := os.MkdirAll(postsDir, 0o755); err != nil {
		t.Fatal(err)
	}

	post, skipped, err := articleToPost(root, postsDir, csvArticle{
		Title:       "Hello World",
		BodyMD:      "\nBody\n",
		Status:      "published",
		CreatedAt:   "2026-01-13 01:25:27.486491+00",
		UpdatedAt:   "2026-01-13 01:25:27.486491+00",
		PublishedAt: "2026-01-13 01:25:27.486491+00",
		Type:        "post",
	}, false)
	if err != nil {
		t.Fatal(err)
	}
	if skipped {
		t.Fatal("expected importable post")
	}
	if post.Frontmatter.Slug != "hello-world" {
		t.Fatalf("slug = %q", post.Frontmatter.Slug)
	}
	if post.Body != "Body\n" {
		t.Fatalf("body = %q", post.Body)
	}
	if post.Frontmatter.PublishedAt == nil || *post.Frontmatter.PublishedAt != "2026-01-13T01:25:27Z" {
		t.Fatalf("published_at = %#v", post.Frontmatter.PublishedAt)
	}
}

func TestArticleToPostSkipsExistingWithoutOverwrite(t *testing.T) {
	root := t.TempDir()
	postsDir := filepath.Join(root, defaultPostsDir)
	if err := os.MkdirAll(postsDir, 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(postsDir, "smoking.md"), []byte("existing"), 0o644); err != nil {
		t.Fatal(err)
	}

	_, skipped, err := articleToPost(root, postsDir, csvArticle{
		Slug:      "smoking",
		Title:     "抽烟",
		BodyMD:    "Body",
		Status:    "published",
		CreatedAt: "2026-01-13 01:25:27.486491+00",
		UpdatedAt: "2026-01-13 01:25:27.486491+00",
		Type:      "post",
	}, false)
	if err != nil {
		t.Fatal(err)
	}
	if !skipped {
		t.Fatal("expected existing file to be skipped")
	}
}

func TestImportWritesMarkdown(t *testing.T) {
	root := t.TempDir()
	if err := os.MkdirAll(filepath.Join(root, "backend", "cmd", "osaetctl"), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.MkdirAll(filepath.Join(root, "frontend", "site"), 0o755); err != nil {
		t.Fatal(err)
	}
	if err := os.WriteFile(filepath.Join(root, "frontend", "site", "package.json"), []byte("{}"), 0o644); err != nil {
		t.Fatal(err)
	}
	csvPath := filepath.Join(root, "articles.csv")
	csvContent := strings.Join([]string{
		"id,slug,title,body_md,body_html,status,archive_id,author_id,published_at,created_at,updated_at,type",
		"post-1,test-post,Test Post,\"Line 1\n\nLine 2\",,published,,,2026-01-13 01:25:27.486491+00,2026-01-13 01:25:27.486491+00,2026-01-13 01:25:27.486491+00,post",
	}, "\n")
	if err := os.WriteFile(csvPath, []byte(csvContent), 0o644); err != nil {
		t.Fatal(err)
	}

	result, err := Import(Options{CSVPath: csvPath, PostsDir: defaultPostsDir, WorkingDir: root})
	if err != nil {
		t.Fatal(err)
	}
	if result.Imported != 1 || result.SkippedExisting != 0 || result.SkippedNonPost != 0 {
		t.Fatalf("result = %#v", result)
	}

	data, err := os.ReadFile(filepath.Join(root, defaultPostsDir, "test-post.md"))
	if err != nil {
		t.Fatal(err)
	}
	content := string(data)
	for _, want := range []string{
		"slug: test-post",
		"title: Test Post",
		"status: published",
		"published_at: \"2026-01-13T01:25:27Z\"",
		"Line 1",
		"Line 2",
	} {
		if !strings.Contains(content, want) {
			t.Fatalf("expected output to contain %q\n%s", want, content)
		}
	}
}