package adapter

import (
	"encoding/json"
	"io"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestGroupsFromUpdatesKeepsGroupsDropsPrivate(t *testing.T) {
	body := []byte(`{
		"ok": true,
		"result": [
			{"update_id": 100000001, "message": {"chat": {"id": 10000778141, "type": "group", "title": "测试AI"}}},
			{"update_id": 100000002, "message": {"chat": {"id": 11, "type": "private", "first_name": "u"}}},
			{"update_id": 100000003, "my_chat_member": {"chat": {"id": 22, "type": "supergroup", "title": "SG", "username": "sg_name"}}}
		]
	}`)
	chats, maxID, err := GroupsFromUpdates(body)
	if err != nil {
		t.Fatal(err)
	}
	if maxID != 100000003 {
		t.Fatalf("maxID=%d", maxID)
	}
	if len(chats) != 2 {
		t.Fatalf("len=%d want 2: %#v", len(chats), chats)
	}
	byID := map[string]SafewChat{}
	for _, c := range chats {
		byID[c.ID] = c
	}
	g := byID["10000778141"]
	if g.Type != "group" || g.Title != "测试AI" {
		t.Fatalf("group: %#v", g)
	}
	raw, _ := json.Marshal(g)
	var m map[string]any
	_ = json.Unmarshal(raw, &m)
	if _, ok := m["id"].(string); !ok {
		t.Fatalf("id JSON type = %T, want string", m["id"])
	}
	sg := byID["22"]
	if sg.Username == nil || *sg.Username != "sg_name" {
		t.Fatalf("username: %#v", sg)
	}
}

func TestFilterSafewChats(t *testing.T) {
	chats := []SafewChat{
		{ID: "10000778141", Type: "group", Title: "测试AI"},
		{ID: "99", Type: "group", Title: "ops"},
	}
	got := FilterSafewChats(chats, "测试")
	if len(got) != 1 || got[0].ID != "10000778141" {
		t.Fatalf("%#v", got)
	}
	got = FilterSafewChats(chats, "10000778141")
	if len(got) != 1 || got[0].Title != "测试AI" {
		t.Fatalf("%#v", got)
	}
	got = FilterSafewChats(chats, "")
	if len(got) != 2 {
		t.Fatalf("empty q should keep all, got %d", len(got))
	}
}

func TestPollGroupChatsSuccess(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/bottok/getUpdates" {
			t.Errorf("path=%s", r.URL.Path)
		}
		raw, _ := io.ReadAll(r.Body)
		var body map[string]any
		_ = json.Unmarshal(raw, &body)
		if body["timeout"] != float64(0) {
			t.Errorf("timeout=%v", body["timeout"])
		}
		if body["offset"] != float64(5) {
			t.Errorf("offset=%v", body["offset"])
		}
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"ok":true,"result":[{"update_id":10,"message":{"chat":{"id":10000778141,"type":"group","title":"测试AI"}}}]}`))
	}))
	defer srv.Close()

	s := &SafeWSender{apiBase: srv.URL}
	chats, next, err := s.PollGroupChats("tok", 5, 0)
	if err != nil {
		t.Fatal(err)
	}
	if next != 11 {
		t.Fatalf("next=%d want 11", next)
	}
	if len(chats) != 1 || chats[0].ID != "10000778141" {
		t.Fatalf("%#v", chats)
	}
}

func TestSafewErrorDescriptionIncludesErrorMsg(t *testing.T) {
	got := safewErrorDescription([]byte(`{"ok":false,"description":"BAD_REQUEST","error_msg":"Conflict: terminated by other getUpdates request"}`))
	if !strings.Contains(got, "Conflict") {
		t.Fatalf("got %q, want error_msg", got)
	}
}

func TestPollGroupChatsUnauthorized(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusUnauthorized)
		_, _ = w.Write([]byte(`{"ok":false,"error_code":401,"description":"BOT_TOKEN_INVALID"}`))
	}))
	defer srv.Close()
	s := &SafeWSender{apiBase: srv.URL}
	_, _, err := s.PollGroupChats("bad", 0, 0)
	if err == nil {
		t.Fatal("expected error")
	}
	ae, ok := err.(*SafewAuthError)
	if !ok {
		t.Fatalf("type %T %v", err, err)
	}
	if !strings.Contains(ae.Description, "BOT_TOKEN_INVALID") {
		t.Fatalf("%q", ae.Description)
	}
}