package analytics

import (
	"context"
	"testing"
	"time"

	"github.com/carlosframework/platform/internal/release"
)

func TestReadRangeMergesBoxesAndDays(t *testing.T) {
	ctx := context.Background()
	s := release.NewDirStore(t.TempDir())
	d1 := delta("box-a", 1, 10)
	d2 := delta("box-b", 1, 5)
	d3 := delta("box-a", 2, 7)
	d3.Date = "2026-09-08"
	d3.Restarted = true
	for _, d := range []Delta{d1, d2, d3} {
		if err := UpsertDay(ctx, s, "bab", "web", d); err != nil {
			t.Fatal(err)
		}
	}
	from := time.Date(2026, 9, 7, 0, 0, 0, 0, time.UTC)
	sum, err := ReadRange(ctx, s, "bab", "web", from, from.Add(24*time.Hour))
	if err != nil {
		t.Fatal(err)
	}
	if len(sum.Days) != 2 || sum.Days[0].Date != "2026-09-07" || sum.Days[0].PV != 15 || sum.Days[1].PV != 7 {
		t.Fatalf("days = %+v", sum.Days)
	}
	if sum.PV != 22 || sum.Pages["/"] != 22 || sum.Days[0].Hours[9] != 15 || !sum.Days[1].Restarted || sum.Days[0].Restarted {
		t.Fatalf("summary = %+v", sum)
	}
	if sum.Visitors != sum.Days[0].Visitors+sum.Days[1].Visitors || sum.Days[0].Visitors < 1 {
		t.Fatalf("visitors must be daily sums: %+v", sum)
	}
	if len(sum.Boxes) != 2 {
		t.Fatalf("boxes = %v", sum.Boxes)
	}
	// An app with no day files reads as an empty summary, not an error.
	empty, err := ReadRange(ctx, s, "bab", "nothing", from, from)
	if err != nil || empty.PV != 0 || len(empty.Days) != 1 {
		t.Fatalf("empty = %+v %v", empty, err)
	}
}