package api

// v3.1：自定义提取码与站点域名单元测试。

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"

	"github.com/gin-gonic/gin"
)

// postForm 以 urlencoded 表单调用 handler（v3.1 测试辅助）。
func postForm(d *Deps, path string, fields map[string]string) *httptest.ResponseRecorder {
	form := url.Values{}
	for k, v := range fields {
		form.Set(k, v)
	}
	req := httptest.NewRequest(http.MethodPost, path, strings.NewReader(form.Encode()))
	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
	var handler gin.HandlerFunc
	switch path {
	case "/share/text":
		handler = d.shareText
	default:
		handler = func(c *gin.Context) { c.AbortWithStatus(http.StatusNotFound) }
	}
	return invoke(handler, req)
}

func TestValidatePickupCode(t *testing.T) {
	// 合法：空（用随机码）
	if err := validatePickupCode(""); err != nil {
		t.Fatalf("空码应合法: %v", err)
	}
	// 合法：5-8 位字母数字（L3：最小长度由 4 提升至 5）
	for _, c := range []string{"abcde", "AB123", "12345678", "a1B2c"} {
		if err := validatePickupCode(c); err != nil {
			t.Fatalf("合法码 %s 不应报错: %v", c, err)
		}
	}
	// 非法：长度（4 位及以下不再允许）
	for _, c := range []string{"abcd", "a1B2", "abc", "123456789"} {
		if err := validatePickupCode(c); err == nil {
			t.Fatalf("非法长度 %s 应报错", c)
		}
	}
	// 非法：字符
	for _, c := range []string{"ab c1", "提码", "ab-cd", "ab.cd", "ab+cd"} {
		if err := validatePickupCode(c); err == nil {
			t.Fatalf("非法字符 %s 应报错", c)
		}
	}
}

func TestNormalizeSiteDomain(t *testing.T) {
	// 空 = 当前地址
	d, err := normalizeSiteDomain("")
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	if d != "" {
		t.Fatalf("want empty, got %q", d)
	}
	// 完整 URL
	d, err = normalizeSiteDomain("https://share.example.com")
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	if d != "https://share.example.com" {
		t.Fatalf("want https://share.example.com, got %q", d)
	}
	// 带端口 + 去尾斜杠
	d, err = normalizeSiteDomain("http://192.168.1.5:8466/")
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	if d != "http://192.168.1.5:8466" {
		t.Fatalf("want http://192.168.1.5:8466, got %q", d)
	}
	// 裸主机自动补 http
	d, err = normalizeSiteDomain("share.example.com")
	if err != nil {
		t.Fatalf("unexpected err: %v", err)
	}
	if d != "http://share.example.com" {
		t.Fatalf("want http://share.example.com, got %q", d)
	}
	// 非法：路径 / 协议
	for _, bad := range []string{"https://a.com/path", "ftp://a.com", "javascript:alert(1)"} {
		if _, err := normalizeSiteDomain(bad); err == nil {
			t.Fatalf("非法域名 %s 应报错", bad)
		}
	}
}

// TestShareTextTextPlainCompat 复刻真实浏览器请求形态：
// 旧前端 bundle 发 text/plain Content-Type + urlencoded body（fetch 字符串 body 默认头）。
// 修复前：该形态被静默存成空文本（bug 1）或 400「分享内容不能为空」（bug 2）。
func TestShareTextTextPlainCompat(t *testing.T) {
	d := newPolicyTestDeps(t)

	body := strings.NewReader("text=111&expire_value=1&expire_style=day&code=")
	req := httptest.NewRequest(http.MethodPost, "/share/text", body)
	req.Header.Set("Content-Type", "text/plain;charset=UTF-8")
	w := invoke(d.shareText, req)
	if w.Code != http.StatusOK {
		t.Fatalf("text/plain+urlencoded 应 200: %d %s", w.Code, w.Body.String())
	}

	// JSON 体但 Content-Type 缺失/为 text/plain 也应可解析
	req2 := httptest.NewRequest(http.MethodPost, "/share/text",
		strings.NewReader(`{"text":"无头JSON","expire_value":1,"expire_style":"day"}`))
	req2.Header.Set("Content-Type", "text/plain;charset=UTF-8")
	w2 := invoke(d.shareText, req2)
	if w2.Code != http.StatusOK {
		t.Fatalf("text/plain+JSON体 应 200: %d %s", w2.Code, w2.Body.String())
	}

	// 取件确认内容真实落库
	req3 := httptest.NewRequest(http.MethodPost, "/share/select",
		strings.NewReader(`{"code":"`+codeOf(w)+`"}`))
	req3.Header.Set("Content-Type", "application/json")
	w3 := invoke(d.shareSelectPost, req3)
	if !strings.Contains(w3.Body.String(), "111") {
		t.Fatalf("落库内容应为 111: %s", w3.Body.String())
	}
}

// codeOf 从创建响应提取取件码。
func codeOf(w *httptest.ResponseRecorder) string {
	var env struct {
		Data struct {
			Code string `json:"code"`
		} `json:"data"`
	}
	_ = json.Unmarshal(w.Body.Bytes(), &env)
	return env.Data.Code
}

func TestShareTextCustomCode(t *testing.T) {
	d := newPolicyTestDeps(t)

	// 自定义码成功创建
	w := postForm(d, "/share/text", map[string]string{"text": "自定义码测试", "code": "MYCODE1"})
	if w.Code != http.StatusOK {
		t.Fatalf("自定义码创建失败: %d %s", w.Code, w.Body.String())
	}

	// 重复占用 → 400
	w = postForm(d, "/share/text", map[string]string{"text": "第二条", "code": "MYCODE1"})
	if w.Code != http.StatusBadRequest {
		t.Fatalf("占用码应 400: %d %s", w.Code, w.Body.String())
	}

	// 非法码 → 400
	w = postForm(d, "/share/text", map[string]string{"text": "第三条", "code": "abc"})
	if w.Code != http.StatusBadRequest {
		t.Fatalf("过短码应 400: %d %s", w.Code, w.Body.String())
	}

	// 空码 → 随机码仍正常
	w = postForm(d, "/share/text", map[string]string{"text": "第四条", "code": ""})
	if w.Code != http.StatusOK {
		t.Fatalf("空码应回退随机: %d %s", w.Code, w.Body.String())
	}
}