package main

import (
	"io/fs"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/gin-gonic/gin"

	"nex/embedfs"
)

func TestSetupStaticFiles(t *testing.T) {
	gin.SetMode(gin.TestMode)

	distFS, err := fs.Sub(embedfs.FrontendDist, "frontend-dist")
	if err != nil {
		t.Skipf("跳过测试: 前端资源未构建: %v", err)
		return
	}

	getContentType := func(path string) string {
		if strings.HasSuffix(path, ".js") {
			return "application/javascript"
		}
		if strings.HasSuffix(path, ".css") {
			return "text/css"
		}
		if strings.HasSuffix(path, ".svg") {
			return "image/svg+xml"
		}
		return "application/octet-stream"
	}

	r := gin.New()
	r.GET("/assets/*filepath", func(c *gin.Context) {
		filepath := c.Param("filepath")
		data, err := fs.ReadFile(distFS, "assets"+filepath)
		if err != nil {
			c.Status(404)
			return
		}
		c.Data(200, getContentType(filepath), data)
	})

	r.GET("/favicon.svg", func(c *gin.Context) {
		data, err := fs.ReadFile(distFS, "favicon.svg")
		if err != nil {
			c.Status(404)
			return
		}
		c.Data(200, "image/svg+xml", data)
	})

	r.NoRoute(func(c *gin.Context) {
		path := c.Request.URL.Path
		if strings.HasPrefix(path, "/api/") ||
			strings.HasPrefix(path, "/v1/") ||
			strings.HasPrefix(path, "/health") {
			c.JSON(404, gin.H{"error": "not found"})
			return
		}
		data, err := fs.ReadFile(distFS, "index.html")
		if err != nil {
			c.Status(500)
			return
		}
		c.Data(200, "text/html; charset=utf-8", data)
	})

	t.Run("API 404", func(t *testing.T) {
		req := httptest.NewRequest("GET", "/api/test", nil)
		w := httptest.NewRecorder()
		r.ServeHTTP(w, req)

		if w.Code != 404 {
			t.Errorf("期望状态码 404, 实际 %d", w.Code)
		}
	})

	t.Run("SPA fallback", func(t *testing.T) {
		req := httptest.NewRequest("GET", "/providers", nil)
		w := httptest.NewRecorder()
		r.ServeHTTP(w, req)

		if w.Code != 200 {
			t.Errorf("期望状态码 200, 实际 %d", w.Code)
		}
	})

	t.Run("MIME type for JS", func(t *testing.T) {
		req := httptest.NewRequest("GET", "/assets/test.js", nil)
		w := httptest.NewRecorder()
		r.ServeHTTP(w, req)

		if w.Code == 200 {
			expected := "application/javascript"
			if w.Header().Get("Content-Type") != expected {
				t.Errorf("期望 Content-Type %s, 实际 %s", expected, w.Header().Get("Content-Type"))
			}
		} else {
			t.Log("文件不存在，跳过 MIME 类型验证")
		}
	})

	t.Run("MIME type for CSS", func(t *testing.T) {
		req := httptest.NewRequest("GET", "/assets/test.css", nil)
		w := httptest.NewRecorder()
		r.ServeHTTP(w, req)

		if w.Code == 200 {
			expected := "text/css"
			if w.Header().Get("Content-Type") != expected {
				t.Errorf("期望 Content-Type %s, 实际 %s", expected, w.Header().Get("Content-Type"))
			}
		} else {
			t.Log("文件不存在，跳过 MIME 类型验证")
		}
	})

	t.Log("静态文件服务测试通过")
}