package scraper

import (
	"os"
	"testing"
)

// TestParseRankingsFixture parses the real rankings fragment captured live
// (internal/scraper/testdata/scoreboard_page1.html) and sanity-checks it.
func TestParseRankingsFixture(t *testing.T) {
	html, err := os.ReadFile("testdata/scoreboard_page1.html")
	if err != nil {
		t.Fatalf("read fixture: %v", err)
	}

	entries, err := parseRankings(string(html))
	if err != nil {
		t.Fatalf("parseRankings: %v", err)
	}

	if len(entries) != pageSize {
		t.Errorf("got %d entries, want %d", len(entries), pageSize)
	}

	first := entries[0]
	if first.Username == "" {
		t.Error("first username is empty")
	}
	if first.Score <= 0 {
		t.Errorf("first score = %d, want > 0", first.Score)
	}

	// Every entry must have a username and positive score. The fragment is
	// returned in score-descending order (root-me's displayed "# N" rank is
	// noisy around ties, so we assert on score, not rank).
	prev := first.Score
	for i, e := range entries {
		if e.Username == "" {
			t.Errorf("entry %d has empty username", i)
		}
		if e.Score <= 0 {
			t.Errorf("entry %d (%s) has non-positive score %d", i, e.Username, e.Score)
		}
		if e.Score > prev {
			t.Errorf("entry %d score %d > previous %d (not descending)", i, e.Score, prev)
		}
		prev = e.Score
	}

	t.Logf("parsed %d entries; #1 = %s (%s, grade=%s) score=%d",
		len(entries), first.Username, first.Country, first.Grade, first.Score)
}