package server

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"mime/multipart"
	"net/http"
	"net/http/httptest"
	"testing"

	core "git-ssh.u1680832.nyat.app/weichen/Agent-System-Core.git"
)

// EXT-8 资源授权适配器（红测：基础设施已就位、读取入口尚未咨询）——
// 默认拒绝保持现状；注册适配器后同项目成员可读共享资源、跨项目仍拒。
func TestProjectResourceAuthorizerSharesReads(t *testing.T) {
	srv, st := newAuthTestServer(t)
	h := srv.Handler()

	alice, err := st.CreateAPIKey("alice", "e2e")
	if err != nil {
		t.Fatal(err)
	}
	bob, err := st.CreateAPIKey("bob", "e2e")
	if err != nil {
		t.Fatal(err)
	}
	carol, err := st.CreateAPIKey("carol", "e2e")
	if err != nil {
		t.Fatal(err)
	}

	// alice 建项目并上传一份工件（owner=alice）。
	prj := struct {
		Name string `json:"name"`
	}{Name: "EXT8 共享项目"}
	req := httptest.NewRequest(http.MethodPost, "/api/projects", bytes.NewReader(marshal(t, prj)))
	req.Header.Set("Authorization", "Bearer "+alice)
	rec := httptest.NewRecorder()
	h.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("create project: %d %s", rec.Code, rec.Body.String())
	}
	pid := decodeField(t, rec.Body.Bytes(), "id")

	var buf bytes.Buffer
	mw := multipart.NewWriter(&buf)
	fw, _ := mw.CreateFormFile("file", "共享说明.txt")
	fw.Write([]byte("SHARED-CONTENT"))
	mw.Close()
	req = httptest.NewRequest(http.MethodPost, "/api/projects/"+pid+"/uploads", &buf)
	req.Header.Set("Authorization", "Bearer "+alice)
	req.Header.Set("Content-Type", mw.FormDataContentType())
	rec = httptest.NewRecorder()
	h.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("upload: %d %s", rec.Code, rec.Body.String())
	}
	aid := decodeField(t, rec.Body.Bytes(), "artifactId")

	get := func(key, path string) *httptest.ResponseRecorder {
		req := httptest.NewRequest(http.MethodGet, path, nil)
		req.Header.Set("Authorization", "Bearer "+key)
		rec := httptest.NewRecorder()
		h.ServeHTTP(rec, req)
		return rec
	}

	// 默认拒绝（未注册适配器）：bob 任何读取都是 NotFound，不泄露存在性。
	for _, path := range []string{"/api/projects/" + pid, "/api/projects/" + pid + "/artifacts", "/api/artifacts/" + aid, "/api/artifacts/" + aid + "/content"} {
		if rec := get(bob, path); rec.Code != http.StatusNotFound {
			t.Fatalf("default-deny: %s = %d, want 404", path, rec.Code)
		}
	}

	// 注册适配器：bob 对该项目有共享授权；carol 无。
	srv.SetProjectAuthorizer(func(owner string, projectID core.ID) (bool, error) {
		return owner == "bob" && string(projectID) == pid, nil
	})

	if rec := get(bob, "/api/artifacts/"+aid); rec.Code != http.StatusOK {
		t.Fatalf("shared artifact meta: %d %s", rec.Code, rec.Body.String())
	}
	rec = get(bob, "/api/artifacts/"+aid+"/content")
	if rec.Code != http.StatusOK || rec.Body.String() != "SHARED-CONTENT" {
		t.Fatalf("shared artifact content: %d %q", rec.Code, rec.Body.String())
	}
	rec = get(bob, "/api/projects/"+pid+"/artifacts")
	if rec.Code != http.StatusOK || !bytes.Contains(rec.Body.Bytes(), []byte(aid)) {
		t.Fatalf("shared artifact list: %d %s", rec.Code, rec.Body.String())
	}

	// 跨项目/未授权用户与错误路径仍拒（NotFound；错误回调 fail-closed）。
	for _, path := range []string{"/api/artifacts/" + aid, "/api/artifacts/" + aid + "/content"} {
		if rec := get(carol, path); rec.Code != http.StatusNotFound {
			t.Fatalf("carol must stay denied: %s = %d", path, rec.Code)
		}
	}
	srv.SetProjectAuthorizer(func(string, core.ID) (bool, error) { return false, io.ErrClosedPipe })
	if rec := get(bob, "/api/artifacts/"+aid); rec.Code != http.StatusNotFound {
		t.Fatalf("authorizer error must fail closed: %d", rec.Code)
	}
}

func marshal(t *testing.T, v any) []byte {
	t.Helper()
	b, err := json.Marshal(v)
	if err != nil {
		t.Fatal(err)
	}
	return b
}

func decodeField(t *testing.T, body []byte, field string) string {
	t.Helper()
	var m map[string]any
	if err := json.Unmarshal(body, &m); err != nil {
		t.Fatalf("decode %s: %v (%s)", field, err, body)
	}
	return fmt.Sprint(m[field])
}