package gateway

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"

	"git.yeij.top/AskaEth/Cyrene_v2/internal/auth"
	"git.yeij.top/AskaEth/Cyrene_v2/internal/services/backthink"
)

// listBackthinkItems 调用管理端点并把线上结构解码回来。
func listBackthinkItems(t *testing.T, ts *httptest.Server, tok string) (int, []byte, []AdminBackthinkItem) {
	t.Helper()
	resp, raw := doReq(t, http.MethodGet, ts.URL+"/api/v1/admin/backthink", nil, tok)
	var list struct {
		Data []AdminBackthinkItem `json:"data"`
	}
	if resp.StatusCode == http.StatusOK {
		if err := json.Unmarshal(raw, &list); err != nil {
			t.Fatalf("decode: %v (%s)", err, raw)
		}
	}
	return resp.StatusCode, raw, list.Data
}

// TestAdminBackthink_ExposesPushRouteDetailBypass 是 P0-20 的真断言：
// GET /api/v1/admin/backthink 必须把后端已存的 PushResult 里
// route/detail/bypassed 真的送到客户端 —— 面板才能解释「为什么打扰 /
// 为什么没打扰」。断言同时落在原始 JSON 与解码后的值上。
func TestAdminBackthink_ExposesPushRouteDetailBypass(t *testing.T) {
	t.Parallel()
	feed := &stubBackthinkFeed{records: []backthink.Record{
		{
			ID: 11, Trigger: "event", At: time.UnixMilli(1700), Conclusion: "服务器告警",
			ShouldPush: true,
			PushResult: backthink.PushResult{Pushed: true, Route: backthink.RouteActiveClient, Bypassed: true, Detail: "2 active clients"},
		},
		{
			ID: 10, Trigger: "heartbeat", At: time.UnixMilli(1600), Conclusion: "只是想了一下",
			ShouldPush: false,
			PushResult: backthink.PushResult{Pushed: false, Route: backthink.RouteRateLimited, Detail: "proactive push rate limited"},
		},
	}}
	_, ts, jwt := buildEnv(t, nil, Deps{Backthink: feed})
	status, raw, items := listBackthinkItems(t, ts, signAny(t, jwt, "acct", auth.RoleOwner))
	if status != http.StatusOK {
		t.Fatalf("status = %d, body = %s", status, raw)
	}
	for _, want := range []string{
		`"route":"active_client"`,
		`"route":"rate_limited"`,
		`"detail":"proactive push rate limited"`,
		`"bypassed":true`,
	} {
		if !strings.Contains(string(raw), want) {
			t.Fatalf("response is missing %s: %s", want, raw)
		}
	}
	if len(items) != 2 {
		t.Fatalf("items = %d, want 2", len(items))
	}
	got := items[0]
	if got.ID != "11" || got.Route != string(backthink.RouteActiveClient) || got.Detail != "2 active clients" || !got.Bypassed || !got.Pushed {
		t.Fatalf("item[0] = %+v", got)
	}
	silent := items[1]
	if silent.Route != string(backthink.RouteRateLimited) || silent.Detail == "" || silent.Bypassed || silent.Pushed {
		t.Fatalf("item[1] = %+v", silent)
	}
}

// TestAdminBackthink_OmitsEmptyRouteAndDetail 钉住「没有值就不编」：未尝试
// 推送（零值 PushResult）的记录不带 route/detail 键，而 bypassed 作为
// 布尔始终显式出现 —— 面板因此能区分「这次没有路由」与「字段没接线」。
func TestAdminBackthink_OmitsEmptyRouteAndDetail(t *testing.T) {
	t.Parallel()
	feed := &stubBackthinkFeed{records: []backthink.Record{
		{ID: 9, Trigger: "idle", At: time.UnixMilli(900), Conclusion: "什么都没有", ShouldPush: false},
	}}
	_, ts, jwt := buildEnv(t, nil, Deps{Backthink: feed})
	status, raw, items := listBackthinkItems(t, ts, signAny(t, jwt, "acct", auth.RoleOwner))
	if status != http.StatusOK {
		t.Fatalf("status = %d, body = %s", status, raw)
	}
	if len(items) != 1 {
		t.Fatalf("items = %d, want 1", len(items))
	}
	it := items[0]
	if it.Route != "" || it.Detail != "" || it.Bypassed || it.Pushed || it.ShouldNotify {
		t.Fatalf("item = %+v, want zero push fields", it)
	}
	if strings.Contains(string(raw), `"route"`) || strings.Contains(string(raw), `"detail"`) {
		t.Fatalf("empty route/detail must be omitted: %s", raw)
	}
	if !strings.Contains(string(raw), `"bypassed":false`) {
		t.Fatalf("bypassed must always be present: %s", raw)
	}
}