package caldata

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

func TestStack(t *testing.T) {
	dir := t.TempDir()
	os.WriteFile(filepath.Join(dir, "poland.ini"),
		[]byte("[layer]\nid = poland\ntype = national\n\n[our-lady-czestochowa]\ndate = 08-26\nrank = solemnity\nclass = bvm\ncolour = white\nname.pl = NMP Częstochowskiej\n"), 0o644)
	os.WriteFile(filepath.Join(dir, "krakow.ini"),
		[]byte("[layer]\nid = krakow\ntype = diocesan\n\n[st-stanislaus]\ndate = 05-08\nrank = solemnity\nclass = saint\ncolour = red\nname.pl = Św. Stanisława\n"), 0o644)

	layers, errs := Stack(dir, []string{"poland", "krakow"})
	if len(errs) != 0 {
		t.Fatalf("unexpected errors: %v", errs)
	}
	if len(layers) != 3 {
		t.Fatalf("want 3 layers (universal+2), got %d", len(layers))
	}
	if layers[0].Type != "universal" || layers[1].ID != "poland" || layers[2].ID != "krakow" {
		t.Errorf("order wrong: %q %q %q", layers[0].Type, layers[1].ID, layers[2].ID)
	}
	if _, ok := layers[1].Cels["our-lady-czestochowa"]; !ok {
		t.Error("poland layer missing its celebration")
	}
}

func TestStackMissingLayerSkips(t *testing.T) {
	dir := t.TempDir()
	os.WriteFile(filepath.Join(dir, "good.ini"),
		[]byte("[layer]\nid = good\n\n[x]\ndate = 01-02\nrank = memorial\nname.en = X\n"), 0o644)
	layers, errs := Stack(dir, []string{"good", "missing"})
	if len(errs) != 1 {
		t.Fatalf("want 1 error for the missing layer, got %v", errs)
	}
	if len(layers) != 2 { // universal + good; missing skipped
		t.Fatalf("want 2 layers, got %d", len(layers))
	}
}

func TestLoadLayerDefaultsIDToStem(t *testing.T) {
	dir := t.TempDir()
	// no id in the [layer] header -> defaults to the stem
	os.WriteFile(filepath.Join(dir, "myparish.ini"),
		[]byte("[layer]\ntype = particular\n\n[dedication]\ndate = 06-15\nrank = solemnity\nname.en = Dedication\n"), 0o644)
	l, err := LoadLayer(filepath.Join(dir, "myparish.ini"), "myparish")
	if err != nil {
		t.Fatal(err)
	}
	if l.ID != "myparish" {
		t.Errorf("ID = %q, want myparish (from stem)", l.ID)
	}
}