package caldata

import (
	"strings"
	"testing"

	"github.com/lukaszkasprzak/lectio/internal/calendar"
)

func TestUniversalLoads(t *testing.T) {
	l := Universal()
	if l.ID != "universal" {
		t.Fatalf("layer id = %q", l.ID)
	}
	// the Assumption (08-15, solemnity) must be present under some slug.
	assumption := false
	for _, rc := range l.Cels {
		if rc.Fields["date"] == "08-15" && rc.Fields["rank"] == "solemnity" {
			assumption = true
		}
	}
	if !assumption {
		t.Fatal("no 08-15 solemnity (Assumption) in the universal calendar")
	}
	// every entry must build into a typed Celebration whose rank parsed.
	for slug, rc := range l.Cels {
		c := calendar.BuildCelebrationForTest(slug, rc)
		if c.Rank == calendar.RankFerial && rc.Fields["rank"] != "" {
			t.Errorf("%s: rank did not parse (%q)", slug, rc.Fields["rank"])
		}
	}
}

func TestUniversalSanctoralReadings(t *testing.T) {
	l := Universal()
	// A feast/solemnity or a PROPER-reading memorial carries its own inline Mass.
	// Partial-proper memorials keep ONLY the strictly-proper part (the resolver
	// fills the rest from the ferial): the Guardian Angels a proper gospel, St
	// Barnabas a proper first reading, Our Lady of Sorrows a proper gospel.
	want := map[string][2]string{ // slug -> {reading.first substr, reading.gospel substr; "" = absent}
		"assumption-of-the-blessed-virgin-mary": {"Revelation 11", "Luke 1:39-56"},
		"all-saints":                            {"Revelation 7", "Matthew 5:1-12"},
		"barnabas-the-apostle":                  {"Acts 11", ""},
		"guardian-angels":                       {"", "Matthew 18:1-5"},
		"our-lady-of-sorrows":                   {"", "John 19:25-27"},
	}
	for slug, w := range want {
		rc, ok := l.Cels[slug]
		if !ok {
			t.Errorf("missing %q", slug)
			continue
		}
		for i, part := range []string{"reading.first", "reading.gospel"} {
			got := rc.Fields[part]
			if w[i] == "" {
				if got != "" {
					t.Errorf("%s: %s = %q, want absent (ferial)", slug, part, got)
				}
			} else if !strings.Contains(got, w[i]) {
				t.Errorf("%s: %s = %q, want containing %q", slug, part, got, w[i])
			}
		}
	}
}

func TestTridentineLoads(t *testing.T) {
	l := Tridentine()
	if l.ID != "tridentine" {
		t.Fatalf("layer id = %q", l.ID)
	}
	// The full 1962 sanctoral is populated (generated from missalemeum), not the
	// 16-entry bootstrap.
	if len(l.Cels) < 250 {
		t.Fatalf("EF sanctoral has only %d entries; expected the full calendar", len(l.Cels))
	}
	// Landmark feasts must be present with the right rank/class: Sts Peter & Paul
	// (I class, 06-29), the Purification/Presentation (II class, 02-02, class
	// = lord -- see classOf's own doc comment in scripts/gen-sanctoral-ef.go
	// for why: the calendarium's own title names the BLESSED VIRGIN, but the
	// tag exists to drive OCCURRENCE behaviour, and missalemeum -- this
	// data's own oracle -- shows the Purification taking a II-class Sunday's
	// place outright, the "festum Domini" pattern, not the ordinary-BVM
	// pattern), the Immaculate Conception (I class, 12-08).
	want := map[string]struct{ date, rank, class string }{
		"sts-peter-paul": {"06-29", "class-1", ""},
		"purification-of-the-blessed-virgin-mary":          {"02-02", "class-2", "lord"},
		"immaculate-conception-of-the-blessed-virgin-mary": {"12-08", "class-1", ""},
	}
	for slug, w := range want {
		rc, ok := l.Cels[slug]
		if !ok {
			t.Errorf("missing landmark feast %q", slug)
			continue
		}
		if rc.Fields["date"] != w.date || rc.Fields["rank"] != w.rank {
			t.Errorf("%s: date/rank = %q/%q, want %q/%q", slug, rc.Fields["date"], rc.Fields["rank"], w.date, w.rank)
		}
		if rc.Fields["class"] != w.class {
			t.Errorf("%s: class = %q, want %q", slug, rc.Fields["class"], w.class)
		}
	}
	// every entry must build into a typed Celebration whose rank parsed.
	for slug, rc := range l.Cels {
		c := calendar.BuildCelebrationForTest(slug, rc)
		if c.Rank == calendar.RankFerial && rc.Fields["rank"] != "" {
			t.Errorf("%s: rank did not parse (%q)", slug, rc.Fields["rank"])
		}
	}
}

// TestTridentineClassOfLord: scripts/gen-sanctoral-ef.go's classOf tags
// feasts of the Lord (class = lord). "Most Holy Name of Mary" was wrongly
// tagged lord (a title-substring false positive: "holy name" alone matches
// both "Holy Name of Jesus" and "Most Holy Name of MARY", calendarium
// "Sanctissimi Nominis Mariae") and is fixed here, not contested. The
// Baptism commemoration was missing the tag entirely (13 January's title
// ends "of THE Lord", not "of OUR Lord", the only suffix classOf used to
// check -- calendarium "IN COMMEMORATIONE BAPTISMATIS D. N. I. C."), also
// fixed and not contested. The Purification is DELIBERATELY absent from
// this table: it stays tagged lord, on occurrence-behaviour evidence, not
// the calendarium's title -- see TestTridentineLoads and classOf's own doc
// comment in scripts/gen-sanctoral-ef.go for the full account of why it is
// the one contested case, not a clean-cut fix.
func TestTridentineClassOfLord(t *testing.T) {
	l := Tridentine()
	want := map[string]string{
		"most-holy-name-of-mary":                   "", // BVM, not the Lord
		"commemoration-of-the-baptism-of-the-lord": "lord",
	}
	for slug, wantClass := range want {
		rc, ok := l.Cels[slug]
		if !ok {
			t.Errorf("missing landmark feast %q", slug)
			continue
		}
		if got := rc.Fields["class"]; got != wantClass {
			t.Errorf("%s: class = %q, want %q", slug, got, wantClass)
		}
	}
}

// TestTridentineLentRankNotCommemoration: 15 III-class feasts, every one
// falling 6 March - 5 April, were tagged rank = commemoration because all
// six of the generator's reference years happen to place that fixed date
// within Lent, where a privileged Lenten feria always outranks an
// equal-class feast (RG 109(e)) -- the generator mistook "how the entry
// presented on the sampled days" for the entry's true, intrinsic rank. A
// sample of the 15 (full list in the report); the calendarium gives each one
// III class outright, e.g. 5 April "S. Vincentii Ferrerii Conf., III
// classis."
func TestTridentineLentRankNotCommemoration(t *testing.T) {
	l := Tridentine()
	for _, slug := range []string{
		"sts-felicitas-perpetua", "thomas-aquinas", "frances-rome",
		"gregory-the-great", "patrick", "benedict", "francis-of-paola",
		"isidore-of-seville", "vincent-ferrer",
	} {
		rc, ok := l.Cels[slug]
		if !ok {
			t.Errorf("missing %q", slug)
			continue
		}
		if got := rc.Fields["rank"]; got != "class-3" {
			t.Errorf("%s: rank = %q, want class-3 (not commemoration)", slug, got)
		}
	}
}

// TestTridentineGenuineCommemorationStaysCommemoration: the fix above must
// NOT promote every commemoration-only entry indiscriminately -- some really
// are without an independent Mass in the 1960-reformed books, demoted even
// on an ORDINARY, unprivileged day (not explained by Lent/Passiontide or any
// higher-class temporal day). St Blaise (3 Feb, an ordinary Septuagesima-
// season feria) is live-confirmed by missalemeum as a mere commemoration
// even then, so RankCommemoration is the honest, correct rank -- promoting
// him to class-4 would let him wrongly win an ordinary green-season feria he
// has no independent Mass to celebrate.
func TestTridentineGenuineCommemorationStaysCommemoration(t *testing.T) {
	l := Tridentine()
	rc, ok := l.Cels["blaise"]
	if !ok {
		t.Fatal("missing blaise")
	}
	if got := rc.Fields["rank"]; got != "commemoration" {
		t.Errorf("blaise: rank = %q, want commemoration (genuinely no independent Mass)", got)
	}
}

// TestTridentineNoMissingEntries: four entries present in missalemeum (and
// so in the calendarium) were silently dropped by the generator's own
// dedup, which keyed a single global map by SLUG alone -- two by a literal
// slug collision with an unrelated feast of the same English title on a
// different date (28 January's "St. Agnes", the traditional SECOND
// commemoration of 21 January's own Agnes; 14 May's "St. Boniface", a
// different martyr from 5 June's Boniface of Mainz), and two (Evaristus,
// Theodore) by the generator returning on the first reference year that
// showed an observed office, before ever reaching the later year that
// revealed their commemoration.
func TestTridentineNoMissingEntries(t *testing.T) {
	l := Tridentine()
	want := map[string]string{
		"agnes-secundo":   "01-28",
		"boniface-martyr": "05-14",
		"evaristus":       "10-26",
		"theodore":        "11-09",
	}
	for slug, date := range want {
		rc, ok := l.Cels[slug]
		if !ok {
			t.Errorf("missing %q (%s)", slug, date)
			continue
		}
		if got := rc.Fields["date"]; got != date {
			t.Errorf("%s: date = %q, want %q", slug, got, date)
		}
	}
}

// TestTridentineNoSpuriousRomanus: the calendarium's 9 August row reads only
// "Vigilia, III classis.", with no "Com." line -- missalemeum's own "St.
// Romanus" commemoration that day has no calendarium support and is a
// genuine upstream data quirk (the same standard already applied to "St.
// Eusebius" on 14 August, also excluded).
func TestTridentineNoSpuriousRomanus(t *testing.T) {
	l := Tridentine()
	if _, ok := l.Cels["romanus"]; ok {
		t.Error("romanus present: the calendarium's 9 August row has no Com. line to support it")
	}
	if rc, ok := l.Cels["eusebius"]; ok && rc.Fields["date"] != "12-16" {
		t.Errorf("eusebius: date = %q, want 12-16 (14 August's Eusebius has no calendarium support)", rc.Fields["date"])
	}
}

// TestTridentineNoTransferArtifacts: a movable-transfer feast displayed on
// whatever civil date it actually landed on in a given reference year (St
// Joseph pushed to 20 March by a Sunday of Lent; the Annunciation deferred
// past Holy Week; All Souls moved to the Monday; St Matthias shown on the
// 25th in a leap year) must not leak into the sanctoral as a phantom
// fixed-date entry keyed to that transferred civil date.
func TestTridentineNoTransferArtifacts(t *testing.T) {
	l := Tridentine()
	for _, slug := range []string{
		"joseph-spouse-of-the-bl-virgin-mary-0320",
		"annunciation-of-the-blessed-virgin-mary-0405",
		"annunciation-of-the-blessed-virgin-mary-0408",
		"annunciation-of-the-blessed-virgin-mary-0409",
		"commemoration-of-all-souls-1103",
		"matthias-0225",
	} {
		if _, ok := l.Cels[slug]; ok {
			t.Errorf("phantom transfer-artifact entry %q present", slug)
		}
	}
}