package api

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"testing/fstest"

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

func TestMountSPA(t *testing.T) {
	gin.SetMode(gin.TestMode)
	dist := fstest.MapFS{
		"index.html":    {Data: []byte("<html>spa-entry</html>")},
		"favicon.svg":   {Data: []byte("<svg/>")},
		"assets/app.js": {Data: []byte("console.log(1)")},
	}
	r := gin.New()
	mountSPA(r, dist)

	tests := []struct {
		name       string
		path       string
		wantStatus int
		wantBody   string // 包含匹配;空跳过
		wantCache  string // Cache-Control 精确匹配;空跳过
		wantJSON   bool
	}{
		{name: "api 未知路径保持 JSON 404", path: "/api/v1/nope", wantStatus: 404, wantBody: "not found", wantJSON: true},
		{name: "ai 未知路径保持 JSON 404", path: "/ai/v1/nope", wantStatus: 404, wantBody: "not found", wantJSON: true},
		{name: "根路径出 index 且禁缓存", path: "/", wantStatus: 200, wantBody: "spa-entry", wantCache: "no-cache"},
		{name: "SPA 路由 fallback 到 index", path: "/ai-gateway/keys", wantStatus: 200, wantBody: "spa-entry", wantCache: "no-cache"},
		{name: "assets 命中带 immutable 长缓存", path: "/assets/app.js", wantStatus: 200, wantBody: "console.log", wantCache: "public, max-age=31536000, immutable"},
		{name: "非 assets 真实文件禁强缓存", path: "/favicon.svg", wantStatus: 200, wantCache: "no-cache"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			w := httptest.NewRecorder()
			req := httptest.NewRequest(http.MethodGet, tt.path, nil)
			r.ServeHTTP(w, req)
			if w.Code != tt.wantStatus {
				t.Fatalf("status = %d, want %d", w.Code, tt.wantStatus)
			}
			if tt.wantBody != "" && !strings.Contains(w.Body.String(), tt.wantBody) {
				t.Fatalf("body %q does not contain %q", w.Body.String(), tt.wantBody)
			}
			if tt.wantCache != "" && w.Header().Get("Cache-Control") != tt.wantCache {
				t.Fatalf("cache-control = %q, want %q", w.Header().Get("Cache-Control"), tt.wantCache)
			}
			if tt.wantJSON && !strings.HasPrefix(w.Header().Get("Content-Type"), "application/json") {
				t.Fatalf("content-type = %q, want json", w.Header().Get("Content-Type"))
			}
		})
	}
}

// TestRegisterWebUIPlaceholder 验证嵌入占位产物可挂载(裸 clone 后 go build/test 即过)。
func TestRegisterWebUIPlaceholder(t *testing.T) {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	if err := registerWebUI(r); err != nil {
		t.Fatalf("registerWebUI: %v", err)
	}
	w := httptest.NewRecorder()
	r.ServeHTTP(w, httptest.NewRequest(http.MethodGet, "/", nil))
	if w.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", w.Code)
	}
}
