// 功能描述：报修上传的内容幂等、格式、跨账户和路径边界回归。
// 版本：1.0.0。
package upload

import (
	"bytes"
	"encoding/json"
	"github.com/gin-gonic/gin"
	"mime/multipart"
	"net/http/httptest"
	"path"
	"strings"
	"testing"
)

func uploadPhotoForTest(t *testing.T, owner, filename string, content []byte) (string, int) {
	t.Helper()
	var body bytes.Buffer
	writer := multipart.NewWriter(&body)
	part, err := writer.CreateFormFile("file", filename)
	if err != nil {
		t.Fatal(err)
	}
	part.Write(content)
	writer.Close()
	response := httptest.NewRecorder()
	ctx, _ := gin.CreateTestContext(response)
	ctx.Request = httptest.NewRequest("POST", "/ticket-photos", &body)
	ctx.Request.Header.Set("Content-Type", writer.FormDataContentType())
	UploadTicketPhoto(ctx, owner)
	var result struct {
		Code    int             `json:"code"`
		Details json.RawMessage `json:"details"`
	}
	if err := json.Unmarshal(response.Body.Bytes(), &result); err != nil {
		t.Fatal(err)
	}
	var details struct {
		URI string `json:"uri"`
	}
	if result.Code == 0 {
		if err := json.Unmarshal(result.Details, &details); err != nil {
			t.Fatal(err)
		}
	}
	return details.URI, result.Code
}

// TestDraftPhotoRead 验证草稿读取只能访问当前账户已上传的文件名。
func TestDraftPhotoRead(t *testing.T) {
	t.Setenv("HEQI_UPLOAD_DIR", t.TempDir())
	picture := pngBytes(t, 2, 2)
	uri, code := uploadPhotoForTest(t, "alice", "image.png", picture)
	if code != 0 {
		t.Fatal("上传失败", code)
	}
	for _, scenario := range []struct {
		owner, name string
		status      int
	}{
		{"alice", path.Base(uri), 200},
		{"bob", path.Base(uri), 404},
		{"alice", "../" + path.Base(uri), 404},
		{"alice", "unknown.png", 404},
	} {
		response := httptest.NewRecorder()
		ctx, _ := gin.CreateTestContext(response)
		ctx.Request = httptest.NewRequest("GET", "/ticket-photos/file", nil)
		ServeOwnedTicketPhoto(ctx, scenario.owner, scenario.name)
		ctx.Writer.WriteHeaderNow()
		if response.Code != scenario.status {
			t.Fatalf("%s: 状态 %d", scenario.owner, response.Code)
		}
		if scenario.status == 200 && !bytes.Equal(response.Body.Bytes(), picture) {
			t.Fatal("图片内容不一致")
		}
	}
}

func TestTicketPhotoStorage(t *testing.T) {
	t.Setenv("HEQI_UPLOAD_DIR", t.TempDir())
	picture := pngBytes(t, 2, 2)
	first, code := uploadPhotoForTest(t, "alice", "image.png", picture)
	if code != 0 || !OwnsTicketPhoto("alice", first) {
		t.Fatal("上传失败", code)
	}
	second, code := uploadPhotoForTest(t, "alice", "other.png", picture)
	if code != 0 || first != second {
		t.Fatal("重复上传未复用")
	}
	if OwnsTicketPhoto("bob", first) {
		t.Fatal("跨账户引用")
	}
	for _, uri := range []string{first + "/../secret.png", strings.ReplaceAll(first, "/", "\\"), "https://example.com/a.png", "/uploads/avatars/a.png"} {
		if OwnsTicketPhoto("alice", uri) {
			t.Fatal("非法路径", uri)
		}
	}
	for _, data := range [][]byte{[]byte("fake"), pngBytes(t, 4097, 1), make([]byte, (2<<20)+1)} {
		if _, code := uploadPhotoForTest(t, "alice", "x.png", data); code == 0 {
			t.Fatal("错误图片被接受")
		}
	}
	response := httptest.NewRecorder()
	ctx, _ := gin.CreateTestContext(response)
	ctx.Request = httptest.NewRequest("GET", "/photo", nil)
	ServeTicketPhoto(ctx, "alice", first)
	if response.Code != 200 || response.Header().Get("Cache-Control") != "private, no-store" || !bytes.Equal(response.Body.Bytes(), picture) {
		t.Fatal("读取或缓存保护失败")
	}
	response = httptest.NewRecorder()
	ctx, _ = gin.CreateTestContext(response)
	ctx.Request = httptest.NewRequest("GET", "/photo", nil)
	ServeTicketPhoto(ctx, "bob", first)
	ctx.Writer.WriteHeaderNow()
	if response.Code != 404 {
		t.Fatal("越权读取")
	}
}