package app

import (
	"strings"
	"testing"
)

func TestNormalizeImitationSourcePrefersURL(t *testing.T) {
	t.Parallel()

	sourceURL, sourceContent, sourceKind, err := normalizeImitationSource(GenerateImitationRequest{
		SourceURL:     " https://example.com/article ",
		SourceContent: "pasted content should be ignored",
	})
	if err != nil {
		t.Fatalf("normalizeImitationSource() error = %v", err)
	}
	if sourceURL != "https://example.com/article" {
		t.Fatalf("sourceURL = %q, want normalized URL", sourceURL)
	}
	if sourceContent != "" {
		t.Fatalf("sourceContent = %q, want empty when URL is present", sourceContent)
	}
	if sourceKind != articleImitationSourceURL {
		t.Fatalf("sourceKind = %q, want %q", sourceKind, articleImitationSourceURL)
	}
}

func TestNormalizeImitationSourceAcceptsPastedContent(t *testing.T) {
	t.Parallel()

	sourceURL, sourceContent, sourceKind, err := normalizeImitationSource(GenerateImitationRequest{
		SourceContent: "  article body  ",
	})
	if err != nil {
		t.Fatalf("normalizeImitationSource() error = %v", err)
	}
	if sourceURL != "" {
		t.Fatalf("sourceURL = %q, want empty", sourceURL)
	}
	if sourceContent != "article body" {
		t.Fatalf("sourceContent = %q, want trimmed content", sourceContent)
	}
	if sourceKind != articleImitationSourceContent {
		t.Fatalf("sourceKind = %q, want %q", sourceKind, articleImitationSourceContent)
	}
}

func TestNormalizeImitationSourceRejectsMissingSource(t *testing.T) {
	t.Parallel()

	_, _, _, err := normalizeImitationSource(GenerateImitationRequest{})
	if err == nil {
		t.Fatal("normalizeImitationSource() error = nil, want source_required")
	}
	if err.Error() != "source_required" {
		t.Fatalf("normalizeImitationSource() error = %q, want source_required", err.Error())
	}
}

func TestNormalizeImitationSourceTruncatesPastedContent(t *testing.T) {
	t.Parallel()

	_, sourceContent, _, err := normalizeImitationSource(GenerateImitationRequest{
		SourceContent: strings.Repeat("文", maxImitationSourceContentRunes+100),
	})
	if err != nil {
		t.Fatalf("normalizeImitationSource() error = %v", err)
	}
	if got := len([]rune(sourceContent)); got != maxImitationSourceContentRunes {
		t.Fatalf("source content rune count = %d, want %d", got, maxImitationSourceContentRunes)
	}
}

func TestImitationSourceDisplayTitleLabelsUntitledPastedContent(t *testing.T) {
	t.Parallel()

	if got := imitationSourceDisplayTitle(articleImitationSourceContent, "", "zh-CN"); got != "粘贴正文" {
		t.Fatalf("Chinese display title = %q, want 粘贴正文", got)
	}
	if got := imitationSourceDisplayTitle(articleImitationSourceContent, "", "en-US"); got != "Pasted content" {
		t.Fatalf("English display title = %q, want Pasted content", got)
	}
	if got := imitationSourceDisplayTitle(articleImitationSourceContent, "Original title", "en-US"); got != "Original title" {
		t.Fatalf("explicit display title = %q, want Original title", got)
	}
}