package api

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strconv"
	"testing"
	"time"

	"github.com/gin-gonic/gin"
	"github.com/openteam/server/internal/api/middleware"
	"github.com/openteam/server/internal/app"
	"github.com/openteam/server/internal/store"
	"gorm.io/gorm"
)

// keysTestEnv 起一个只挂 keys 路由的引擎，SessionAuth 用桩替换——
// 直接把用户塞进会话上下文，绕过 JWT/argon2，专注测 handler 语义。
type keysTestEnv struct {
	t    *testing.T
	db   *gorm.DB
	user *store.User
	r    *gin.Engine
}

func newKeysTestEnv(t *testing.T) *keysTestEnv {
	t.Helper()
	gin.SetMode(gin.TestMode)
	db, err := store.Open("sqlite", "/tmp/api_keys_test_"+time.Now().Format("150405.000000000")+".db")
	if err != nil {
		t.Fatalf("open db: %v", err)
	}
	t.Cleanup(func() {
		sqlDB, _ := db.DB()
		sqlDB.Close()
	})
	u := store.User{Username: "u1", Email: "u1@x.com", PasswordHash: "x",
		Role: store.RoleUser, Balance: 100, Status: store.UserStatusActive}
	if err := db.Create(&u).Error; err != nil {
		t.Fatal(err)
	}

	h := &Handler{a: &app.App{DB: db}}
	r := gin.New()
	g := r.Group("", func(c *gin.Context) {
		c.Set(middleware.CtxSessionUser, &u)
		c.Next()
	})
	g.POST("/keys", h.CreateKey)
	g.GET("/keys", h.ListKeys)
	g.PATCH("/keys/:id", h.PatchKey)
	g.DELETE("/keys/:id", h.DeleteKey)

	return &keysTestEnv{t: t, db: db, user: &u, r: r}
}

func (e *keysTestEnv) do(method, path string, body any) *httptest.ResponseRecorder {
	e.t.Helper()
	var buf *bytes.Buffer
	if body != nil {
		b, _ := json.Marshal(body)
		buf = bytes.NewBuffer(b)
	} else {
		buf = bytes.NewBuffer(nil)
	}
	w := httptest.NewRecorder()
	req := httptest.NewRequest(method, path, buf)
	req.Header.Set("Content-Type", "application/json")
	e.r.ServeHTTP(w, req)
	return w
}

// 完整生命周期：创建（明文仅一次返回）→ 列表（只有前缀）→ 改限额 → 删除后列表不含。
func TestKeysLifecycle(t *testing.T) {
	e := newKeysTestEnv(t)

	// 创建：明文一次性返回，库存哈希
	w := e.do(http.MethodPost, "/keys", map[string]any{"name": "dev", "quota_requests_per_day": 10})
	if w.Code != http.StatusCreated {
		t.Fatalf("create: %d %s", w.Code, w.Body.String())
	}
	var created struct {
		Data struct {
			Key string `json:"key"`
			ID  uint64 `json:"id"`
		} `json:"data"`
	}
	if err := json.Unmarshal(w.Body.Bytes(), &created); err != nil {
		t.Fatal(err)
	}
	if len(created.Data.Key) < 48 {
		t.Fatalf("明文 key 应完整返回，实际 %q", created.Data.Key)
	}

	// 列表：不应含明文
	w = e.do(http.MethodGet, "/keys", nil)
	if w.Code != http.StatusOK || bytes.Contains(w.Body.Bytes(), []byte(created.Data.Key)) {
		t.Fatalf("列表泄漏明文 key: %d %s", w.Code, w.Body.String())
	}

	// 补丁：改日请求数配额
	w = e.do(http.MethodPatch, "/keys/"+strconv.FormatUint(created.Data.ID, 10), map[string]any{"quota_requests_per_day": 20})
	if w.Code != http.StatusOK {
		t.Fatalf("patch: %d %s", w.Code, w.Body.String())
	}
	var k store.APIKey
	e.db.First(&k, created.Data.ID)
	if k.QuotaRequestsPerDay == nil || *k.QuotaRequestsPerDay != 20 {
		t.Fatalf("配额应改为 20，实际 %+v", k.QuotaRequestsPerDay)
	}

	// 删除：状态置 revoked（或删行），列表不再返回
	w = e.do(http.MethodDelete, "/keys/"+strconv.FormatUint(created.Data.ID, 10), nil)
	if w.Code != http.StatusOK {
		t.Fatalf("delete: %d %s", w.Code, w.Body.String())
	}
	w = e.do(http.MethodGet, "/keys", nil)
	if bytes.Contains(w.Body.Bytes(), []byte(`"dev"`)) {
		t.Fatal("删除后列表不应再返回该密钥")
	}
}

// 用户隔离：A 的密钥 B 看不见也改不了。
func TestKeysUserIsolation(t *testing.T) {
	e := newKeysTestEnv(t)
	other := store.User{Username: "u2", Email: "u2@x.com", PasswordHash: "x",
		Role: store.RoleUser, Balance: 0, Status: store.UserStatusActive}
	e.db.Create(&other)
	var k store.APIKey
	k = store.APIKey{UserID: other.ID, Name: "theirs", KeyHash: "h2", KeyPrefix: "pre",
		Status: store.KeyStatusActive}
	e.db.Create(&k)

	// 当前用户（u1）patch 别人的密钥：404（按 user_id 过滤，不泄漏存在性）
	w := e.do(http.MethodPatch, "/keys/"+strconv.FormatUint(k.ID, 10), map[string]any{"name": "hijack"})
	if w.Code != http.StatusNotFound {
		t.Fatalf("跨用户 patch 应 404，实际 %d %s", w.Code, w.Body.String())
	}
	w = e.do(http.MethodDelete, "/keys/"+strconv.FormatUint(k.ID, 10), nil)
	if w.Code != http.StatusNotFound {
		t.Fatalf("跨用户 delete 应 404，实际 %d %s", w.Code, w.Body.String())
	}
}