package adtracking

import (
	"testing"
)

func TestAppendTrackCode(t *testing.T) {
	tests := []struct {
		target   string
		code     string
		expected string
	}{
		{
			target:   "https://hao858.com",
			code:     "wb01",
			expected: "https://hao858.com?track_code=wb01",
		},
		{
			target:   "https://hao858.com/",
			code:     "campus99",
			expected: "https://hao858.com/?track_code=campus99",
		},
		{
			target:   "https://hao858.com/listings?game=delta",
			code:     "poster01",
			expected: "https://hao858.com/listings?game=delta&track_code=poster01",
		},
	}

	for _, tt := range tests {
		got := appendTrackCode(tt.target, tt.code)
		if got != tt.expected {
			t.Errorf("appendTrackCode(%q, %q) = %q; want %q", tt.target, tt.code, got, tt.expected)
		}
	}
}

func TestParseUserAgent(t *testing.T) {
	tests := []struct {
		ua             string
		wantDeviceType string
		wantOS         string
		wantBrowser    string
	}{
		{
			ua:             "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
			wantDeviceType: "pc",
			wantOS:         "macOS",
			wantBrowser:    "Chrome",
		},
		{
			ua:             "Mozilla/5.0 (iPhone; CPU iPhone OS 16_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 MicroMessenger/8.0.38",
			wantDeviceType: "mobile",
			wantOS:         "iOS",
			wantBrowser:    "WeChat",
		},
		{
			ua:             "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36 Edg/119.0.0.0",
			wantDeviceType: "pc",
			wantOS:         "Windows",
			wantBrowser:    "Edge",
		},
	}

	for _, tt := range tests {
		deviceType, _, browser := parseUserAgent(tt.ua)
		if deviceType != tt.wantDeviceType {
			t.Errorf("parseUserAgent(%q) deviceType = %q; want %q", tt.ua, deviceType, tt.wantDeviceType)
		}
		if browser != tt.wantBrowser {
			t.Errorf("parseUserAgent(%q) browser = %q; want %q", tt.ua, browser, tt.wantBrowser)
		}
	}
}

func TestCodePattern(t *testing.T) {
	validCodes := []string{"wb01", "campus_2026", "poster-hefei", "NetBar99"}
	for _, c := range validCodes {
		if !codePattern.MatchString(c) {
			t.Errorf("expected valid code %q", c)
		}
	}

	invalidCodes := []string{"a", "has space", "bad@code", "中文短码", "a!b"}
	for _, c := range invalidCodes {
		if codePattern.MatchString(c) {
			t.Errorf("expected invalid code %q", c)
		}
	}
}

func TestValidateTargetURL(t *testing.T) {
	tests := []struct {
		input       string
		allowLocal  bool
		wantURL     string
		wantErr     bool
		errExpected error
	}{
		{"", false, "https://hao858.com/", false, nil},
		{"/listings", false, "https://hao858.com/listings", false, nil},
		{"https://hao858.com", false, "https://hao858.com", false, nil},
		{"https://h5.hao858.com/m", false, "https://h5.hao858.com/m", false, nil},
		{"http://localhost:5189", true, "http://localhost:5189", false, nil},
		{"http://127.0.0.1:18088", true, "http://127.0.0.1:18088", false, nil},
		{"http://localhost:5189", false, "", true, ErrDisallowedTargetDomain},
		{"http://127.0.0.1:18088", false, "", true, ErrDisallowedTargetDomain},
		{"https://evil-phishing.com", false, "", true, ErrDisallowedTargetDomain},
		{"https://hao858.com.fake.com", false, "", true, ErrDisallowedTargetDomain},
		{"https://sub.evil.com/hao858.com", false, "", true, ErrDisallowedTargetDomain},
	}

	for _, tt := range tests {
		got, err := validateTargetURL(tt.input, tt.allowLocal)
		if tt.wantErr {
			if err == nil {
				t.Errorf("validateTargetURL(%q, %v) expected error, got nil", tt.input, tt.allowLocal)
			}
			if tt.errExpected != nil && err != tt.errExpected {
				t.Errorf("validateTargetURL(%q, %v) err = %v; want %v", tt.input, tt.allowLocal, err, tt.errExpected)
			}
		} else {
			if err != nil {
				t.Errorf("validateTargetURL(%q, %v) unexpected error: %v", tt.input, tt.allowLocal, err)
			}
			if got != tt.wantURL {
				t.Errorf("validateTargetURL(%q, %v) = %q; want %q", tt.input, tt.allowLocal, got, tt.wantURL)
			}
		}
	}
}