package httpapi

import (
	"strings"
	"testing"

	"knowledge-governance/internal/librarydiff"
)

func TestWikiViewFromKeepsContributionDetail(t *testing.T) {
	result := librarydiff.WikiResult{
		State: "computed", Added: 0, Updated: 1, Removed: 1, SourcesAdded: 0, SourcesRemoved: 2,
		BaseCount: 2, TargetCount: 1,
		Pages: []librarydiff.WikiContribution{
			{Slug: "entity/gate", Title: "发布闸门", PageType: "entity", Status: "updated",
				Changed: []string{"content", "sources", "citations"}, SourcesRemoved: []string{"doc-a"},
				CitationsBefore: 2, CitationsAfter: 1},
			{Slug: "entity/only-a", Title: "只属于 A", PageType: "entity", Status: "removed",
				Changed: []string{"removed"}, SourcesRemoved: []string{"doc-a"}},
		},
	}
	view := wikiViewFrom(result, 0)
	if view.State != "computed" || view.Updated != 1 || view.Removed != 1 || view.SourcesRemoved != 2 {
		t.Fatalf("view: %+v", view)
	}
	if len(view.Pages) != 2 {
		t.Fatalf("pages: %+v", view.Pages)
	}
	kept := view.Pages[0]
	if kept.Status != "updated" || len(kept.Changed) != 3 || kept.Changed[0] != "正文" {
		t.Fatalf("changed labels: %+v", kept)
	}
	if len(kept.SourcesRemoved) != 1 || kept.SourcesRemoved[0] != "doc-a" {
		t.Fatalf("sources: %+v", kept)
	}
	if !strings.Contains(view.Note, "来源") {
		t.Fatalf("note should explain what is compared: %q", view.Note)
	}
}

func TestWikiViewFromCapsPagesAndSaysSo(t *testing.T) {
	result := librarydiff.WikiResult{State: "computed", BaseCount: 0}
	for _, slug := range []string{"a", "b", "c"} {
		result.Pages = append(result.Pages, librarydiff.WikiContribution{Slug: slug, Status: "added"})
		result.Added++
	}
	view := wikiViewFrom(result, 2)
	if len(view.Pages) != 2 || !view.PagesTruncated {
		t.Fatalf("cap: pages=%d truncated=%v", len(view.Pages), view.PagesTruncated)
	}
}