package calfeed

import (
	"encoding/json"
	"testing"

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

func TestJSONShape(t *testing.T) {
	days := []DayView{{
		Date: "2026-01-06", Season: "time-after-epiphany", Week: 1,
		Weekday: "Tuesday", Colour: "white",
		Observed: CelView{Slug: "ef-epiphany", Name: "The Epiphany of the Lord", Rank: "class-1", Class: 1},
		Others:   []CelView{},
		Cycles:   Cycles{},
		Readings: []ReadingView{{Part: "gospel", Citation: "Matt 2:1-12"}},
	}}
	b, err := JSON("old", days)
	if err != nil {
		t.Fatal(err)
	}
	var out struct {
		Schema string    `json:"schema"`
		Form   string    `json:"form"`
		Days   []DayView `json:"days"`
	}
	if err := json.Unmarshal(b, &out); err != nil {
		t.Fatal(err)
	}
	if out.Schema != "lectio.calendar/1" || out.Form != "old" || len(out.Days) != 1 {
		t.Fatalf("bad envelope: %s", b)
	}
	if out.Days[0].Observed.Name != "The Epiphany of the Lord" {
		t.Fatalf("bad day: %s", b)
	}
}

// TestJSONCarriesSourceOffer pins the AGPL-3.0 §13 offer into the envelope.
// A consumer of /api/calendar.json may never load a single HTML page, so the
// footer link does not reach them -- the feed itself has to say where the
// source is. Dropping these fields is a licence-compliance regression, not a
// cosmetic one, which is why it is asserted rather than left to review.
func TestJSONCarriesSourceOffer(t *testing.T) {
	b, err := JSON("new", nil)
	if err != nil {
		t.Fatal(err)
	}
	var out struct {
		Source  string `json:"source"`
		License string `json:"license"`
	}
	if err := json.Unmarshal(b, &out); err != nil {
		t.Fatal(err)
	}
	if out.Source != config.SourceURL {
		t.Errorf("source = %q, want %q", out.Source, config.SourceURL)
	}
	if out.License != config.License {
		t.Errorf("license = %q, want %q", out.License, config.License)
	}
}