package sitemap

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

	"git.golem15.com/golem15/sm-sitemap-plugin/classes"
	"git.golem15.com/golem15/sm-sitemap-plugin/models"
	"git.golem15.com/golem15/summercms/modules/backpack"
	"git.golem15.com/golem15/summercms/modules/compass"
)

// TestSiteURLPrecedence pins the site address every <loc> starts with
// (CONTEXT 2026-10-28): the setting, else golem15.sitemap.site_url, else
// app.url, each only when it is an absolute http(s) URL, trailing slashes
// trimmed; nothing configured is "" (the request's Host is never used).
func TestSiteURLPrecedence(t *testing.T) {
	app := func(t *testing.T, files map[string]string) *backpack.App {
		t.Helper()
		dir := t.TempDir()
		for name, body := range files {
			if err := os.WriteFile(filepath.Join(dir, name), []byte(body), 0o644); err != nil {
				t.Fatal(err)
			}
		}
		cfg, err := compass.Open(compass.Options{Dir: dir, Environ: []string{}})
		if err != nil {
			t.Fatal(err)
		}
		return backpack.New(cfg)
	}
	text := func(s string) *string { return &s }
	both := app(t, map[string]string{"app.yaml": "url: https://api.example.test/\n", "golem15.yaml": "sitemap:\n  site_url: https://config.example.test/\n"})
	appOnly := app(t, map[string]string{"app.yaml": "url: https://api.example.test/\n"})
	for _, tc := range []struct {
		name     string
		app      *backpack.App
		settings models.Settings
		want     string
	}{
		{"setting wins", both, models.Settings{SiteURL: text("https://www.example.test/")}, "https://www.example.test"},
		{"config key", both, models.Settings{}, "https://config.example.test"},
		{"app.url", appOnly, models.Settings{}, "https://api.example.test"},
		{"unsafe setting skipped", appOnly, models.Settings{SiteURL: text("javascript:alert(1)")}, "https://api.example.test"},
		{"nothing configured", app(t, nil), models.Settings{}, ""},
		{"nil app", nil, models.Settings{}, ""},
	} {
		t.Run(tc.name, func(t *testing.T) {
			if got := classes.SiteURL(tc.app, tc.settings); got != tc.want {
				t.Fatalf("SiteURL = %q, want %q", got, tc.want)
			}
		})
	}
}

// TestFileNames pins the per-group file names the index lists and the file
// route accepts.
func TestFileNames(t *testing.T) {
	if got := classes.FileName("posts", 3); got != "sitemap-posts-3.xml" {
		t.Fatalf("FileName = %q", got)
	}
	for name, want := range map[string]struct {
		grp string
		n   int
		ok  bool
	}{
		"sitemap-posts-1.xml":          {"posts", 1, true},
		"sitemap-landing-pages-12.xml": {"landing-pages", 12, true},
		"sitemap-posts-2-1.xml":        {"posts-2", 1, true},
		"sitemap-posts-0.xml":          {"", 0, false},
		"sitemap-Posts-1.xml":          {"", 0, false},
		"sitemap-posts.xml":            {"", 0, false},
		"sitemap-../x-1.xml":           {"", 0, false},
	} {
		grp, n, ok := classes.ParseFileName(name)
		if grp != want.grp || n != want.n || ok != want.ok {
			t.Errorf("ParseFileName(%q) = %q %d %v, want %+v", name, grp, n, ok, want)
		}
	}
}