package cli

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

	"github.com/lukaszkasprzak/lectio/internal/bible"
	"github.com/lukaszkasprzak/lectio/internal/config"
)

func TestRunLiturgy(t *testing.T) {
	dir := t.TempDir()
	t.Setenv("LECTIO_CONFIG", filepath.Join(dir, "config.ini"))
	cfg, err := config.Load()
	if err != nil {
		t.Fatal(err)
	}
	var buf bytes.Buffer
	if code := runLiturgy(cfg, "2025-08-15", &buf, &buf); code != 0 {
		t.Fatalf("exit code %d", code)
	}
	out := buf.String()
	if !strings.Contains(out, "2025-08-15") {
		t.Errorf("missing date:\n%s", out)
	}
	if !strings.Contains(strings.ToLower(out), "solemnity") || !strings.Contains(out, "Assumption") {
		t.Errorf("2025-08-15 should be the Assumption solemnity:\n%s", out)
	}
	if !strings.Contains(out, "gospel (") {
		t.Errorf("proper reading not shown:\n%s", out)
	}
}

func TestRunLiturgyTraditionalComputesEF(t *testing.T) {
	dir := t.TempDir()
	t.Setenv("LECTIO_CONFIG", filepath.Join(dir, "config.ini"))
	os.WriteFile(filepath.Join(dir, "config.ini"), []byte("lectionary = traditional\n"), 0o644)
	cfg, err := config.Load()
	if err != nil {
		t.Fatal(err)
	}
	var buf bytes.Buffer
	if code := runLiturgy(cfg, "2025-08-15", &buf, &buf); code != 0 {
		t.Fatalf("EF compute failed (%d):\n%s", code, buf.String())
	}
	out := buf.String()
	// EF: Assumption is I class, and 2025-08-15 is in Time after Pentecost (not OF "ordinary").
	if !strings.Contains(out, "Assumption") || !strings.Contains(out, "I class") {
		t.Errorf("expected EF Assumption (I class):\n%s", out)
	}
	if !strings.Contains(out, "time-after-pentecost") {
		t.Errorf("expected EF season time-after-pentecost:\n%s", out)
	}
}

func TestVernacularVersionResolver(t *testing.T) {
	// pl has no autoselect-eligible corpus (the built-in Wujek sets
	// autoselect=false), so Polish always falls back to Latin regardless of
	// which optional corpora are embedded -- pure logic, keep it running.
	if got := vernacularVersion(config.Config{UILanguage: "pl"}); got != "vul" {
		t.Fatalf("pl should fall back to Latin: %q", got)
	}
	// Both the explicit reading_version passthrough and the en->drb autoselect
	// resolve through bible.Meta("drb") (Config.ReadingCorpus), so they need the
	// optional drb corpus embedded.
	t.Run("drb", func(t *testing.T) {
		requireCorpus(t, "drb")
		if got := vernacularVersion(config.Config{ReadingVersion: "drb"}); got != "drb" {
			t.Fatalf("explicit: %q", got)
		}
		if got := vernacularVersion(config.Config{UILanguage: "en"}); got != "drb" {
			t.Fatalf("en should be drb: %q", got)
		}
	})
}

// requireCorpus skips the test when corpus `code` is not embedded in this
// build. The optional corpora (wuj, drb, grb) compile in only with
// `-tags fullbible` (or when dropped into the user corpora dir); mirrors the
// helper in internal/bible so these tests run under fullbible and skip -- not
// fail -- on the default vul-only build.
func requireCorpus(t *testing.T, code string) {
	t.Helper()
	if _, ok := bible.Meta(code); !ok {
		t.Skipf("corpus %q not embedded; build with -tags fullbible", code)
	}
}

func TestVersionDisplayNameFallsBackToCorpusMeta(t *testing.T) {
	bible.SetUserCorporaDir("../bible/testdata/corpora")
	t.Cleanup(func() { bible.SetUserCorporaDir("") })

	// "good" is a user fixture with no i18n entry; its sidecar Name must
	// surface instead of the bare code.
	if got := versionDisplayName("en", "good"); got != "Good Test Corpus" {
		t.Fatalf("expected sidecar Name fallback, got %q", got)
	}
	// a known i18n code still uses the localized chrome label.
	if got := versionDisplayName("en", "drb"); got == "drb" {
		t.Fatalf("expected localized label, got bare code %q", got)
	}
	// a totally unknown code with no sidecar falls back to the bare code.
	if got := versionDisplayName("en", "zzz-nope"); got != "zzz-nope" {
		t.Fatalf("expected bare-code fallback, got %q", got)
	}
}

func TestRunLiturgyUserLayer(t *testing.T) {
	dir := t.TempDir()
	t.Setenv("LECTIO_CONFIG", filepath.Join(dir, "config.ini"))
	// a local layer adds a solemnity on 2025-08-11 (an ordinary Monday), and use it.
	os.MkdirAll(filepath.Join(dir, "calendars"), 0o755)
	os.WriteFile(filepath.Join(dir, "calendars", "local.ini"),
		[]byte("[layer]\nid = local\ntype = particular\n\n[patron]\ndate = 08-11\nrank = solemnity\nclass = saint\ncolour = red\nname.en = Local Patron\n"), 0o644)
	os.WriteFile(filepath.Join(dir, "config.ini"), []byte("use = local\n"), 0o644)

	cfg, err := config.Load()
	if err != nil {
		t.Fatal(err)
	}
	var buf bytes.Buffer
	if code := runLiturgy(cfg, "2025-08-11", &buf, &buf); code != 0 {
		t.Fatalf("exit %d", code)
	}
	if !strings.Contains(buf.String(), "Local Patron") {
		t.Fatalf("user layer's solemnity not observed:\n%s", buf.String())
	}
}