package messaging

import "testing"

func TestExtractImageURLs(t *testing.T) {
	text := "check ![img](https://example.com/a.png) and ![](https://example.com/b.jpg)"
	urls := ExtractImageURLs(text)
	if len(urls) != 2 {
		t.Fatalf("expected 2 urls, got %d", len(urls))
	}
	if urls[0] != "https://example.com/a.png" {
		t.Errorf("urls[0] = %q", urls[0])
	}
	if urls[1] != "https://example.com/b.jpg" {
		t.Errorf("urls[1] = %q", urls[1])
	}
}

func TestExtractImageURLs_NoImages(t *testing.T) {
	urls := ExtractImageURLs("just plain text")
	if len(urls) != 0 {
		t.Errorf("expected 0 urls, got %d", len(urls))
	}
}

func TestExtractImageURLs_RelativeURL(t *testing.T) {
	text := "![img](./local.png)"
	urls := ExtractImageURLs(text)
	if len(urls) != 0 {
		t.Errorf("expected 0 urls for relative path, got %d", len(urls))
	}
}

func TestFilenameFromURL(t *testing.T) {
	tests := []struct {
		url  string
		want string
	}{
		{"https://example.com/photo.png", "photo.png"},
		{"https://example.com/path/to/report.pdf", "report.pdf"},
		{"https://example.com/file", "file"},
	}
	for _, tt := range tests {
		got := filenameFromURL(tt.url)
		if got != tt.want {
			t.Errorf("filenameFromURL(%q) = %q, want %q", tt.url, got, tt.want)
		}
	}
}

func TestFilenameFromURL_WithQuery(t *testing.T) {
	got := filenameFromURL("https://example.com/photo.png?token=abc")
	if got != "photo.png" {
		t.Errorf("got %q, want %q", got, "photo.png")
	}
}

func TestStripQuery(t *testing.T) {
	tests := []struct {
		input string
		want  string
	}{
		{"https://example.com/a?b=c", "https://example.com/a"},
		{"https://example.com/a", "https://example.com/a"},
		{"https://example.com/?x=1&y=2", "https://example.com/"},
	}
	for _, tt := range tests {
		got := stripQuery(tt.input)
		if got != tt.want {
			t.Errorf("stripQuery(%q) = %q, want %q", tt.input, got, tt.want)
		}
	}
}