package route

import (
	"strings"
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/tamakyi/TamaBox/internal/conf"
)

// withSecurityConf 临时改 conf.Security 并在测试结束后还原，避免污染同包其它用例。
func withSecurityConf(t *testing.T, csp, reportURI string) {
	t.Helper()
	oldCSP, oldURI := conf.Security.CSP, conf.Security.CSPReportURI
	conf.Security.CSP = csp
	conf.Security.CSPReportURI = reportURI
	t.Cleanup(func() {
		conf.Security.CSP = oldCSP
		conf.Security.CSPReportURI = oldURI
	})
}

func TestCSPMode(t *testing.T) {
	cases := []struct {
		in   string
		want string
	}{
		{"", "enforce"}, // 未配置：默认拦截（report-only 没有上报地址等于没装）
		{"report", "report"},
		{"REPORT", "report"},
		{"report-only", "report"},
		{"off", "off"},
		{"none", "off"},
		{"enforce", "enforce"},
		{" true ", "enforce"},
		{"enfroce", "report"}, // 拼错退化为不拦截
	}
	for _, tc := range cases {
		withSecurityConf(t, tc.in, "")
		require.Equal(t, tc.want, cspMode(), "输入 %q", tc.in)
	}
}

func TestCSPPolicy(t *testing.T) {
	old := conf.Upload
	t.Cleanup(func() { conf.Upload = old })

	// 生产配置的真实写法：Host 带路径、Domain 是完整 URL。
	conf.Upload.ImageBucketCDNHost = "r2.example.net/tamabox"
	conf.Upload.AliyunBucketCDNHost = ""
	conf.Recaptcha.Domain = "https://www.recaptcha.net"

	withSecurityConf(t, "enforce", "")

	policy := cspPolicy()
	for _, want := range []string{
		"default-src 'self'",
		"object-src 'none'",
		"base-uri 'none'",
		"form-action 'self'",
		"frame-ancestors 'none'",
		// 脚本白名单：站内 + 内联 + eval（Alpine 需要）+ 公共 CDN + 验证码
		"script-src 'self' 'unsafe-inline' 'unsafe-eval'",
		"https://cdnjs.snrat.com",
		// umami 统计脚本是 header.html 里运行时动态注入的，静态 grep 模板看不到；
		// 少这一条会让 enforce 模式直接拦掉它（已在浏览器实测中复现过）。
		"https://mami.shiroko.one",
		"https://challenges.cloudflare.com",
		"https://www.recaptcha.net",
		// 带路径的配置必须被归一化成 origin，否则整条源非法、浏览器静默忽略
		"https://r2.example.net",
	} {
		require.Contains(t, policy, want)
	}
	require.NotContains(t, policy, "r2.example.net/tamabox", "带路径的配置必须裁成 origin")
	require.NotContains(t, policy, "report-uri", "没配上报地址时不应出现 report-uri")
}

// TestCSPPolicySentry 覆盖「配了 sentry_dsn 才放行 Sentry CDN」这个条件白名单。
// 两个方向都会静默出错：线上没开 Sentry 时白名单里多挂一个第三方源；开了 Sentry
// 时错误上报被 enforce 直接拦掉，而页面上完全看不出异常。
func TestCSPPolicySentry(t *testing.T) {
	old := conf.App
	t.Cleanup(func() { conf.App = old })

	conf.App.SentryDSN = ""
	require.NotContains(t, cspPolicy(), "browser.sentry-cdn.com")

	conf.App.SentryDSN = "https://key@sentry.example.net/1"
	require.Contains(t, cspPolicy(), "https://browser.sentry-cdn.com")
}

func TestCSPPolicyReportURI(t *testing.T) {
	withSecurityConf(t, "report", "https://csp.example.net/collect")
	require.Contains(t, cspPolicy(), "report-uri https://csp.example.net/collect")
}

func TestIsNoStorePath(t *testing.T) {
	for _, p := range []string{"/user", "/user/", "/user/profile", "/_", "/_/someone", "/_/someone/1"} {
		require.True(t, isNoStorePath(p), p)
	}
	// 分享卡是给社交平台抓取的公开图片，且渲染成本高，刻意不套 no-store。
	for _, p := range []string{"/", "/login", "/static/css/base.css", "/_foo", "/users", "/explore",
		"/_/someone/share-card", "/_/someone/1/share-card"} {
		require.False(t, isNoStorePath(p), p)
	}
}

// TestCSPPolicyNoEmptyOrigin 防止配置留空时拼出非法源（如 "https://"）。
func TestCSPPolicyNoEmptyOrigin(t *testing.T) {
	old := conf.Upload
	t.Cleanup(func() { conf.Upload = old })
	conf.Upload.ImageBucketCDNHost = ""
	conf.Upload.AliyunBucketCDNHost = ""
	conf.Recaptcha.Domain = ""

	policy := cspPolicy()
	require.False(t, strings.Contains(policy, "https:// ") || strings.HasSuffix(policy, "https://"), policy)
}