package accept

import (
	"fmt"
	"os"
	"strconv"
	"testing"
	"time"

	"git.asio.asia/nixevol/NixMsg/internal/protocol"
	"git.asio.asia/nixevol/NixMsg/test/harness"
)

// TestF03DirectoryScale 按 NIXMSG_DIR_N 开通并保持在线，分页拉完整目录并计时。
// 默认跳过，不进入 task check。
func TestF03DirectoryScale(t *testing.T) {
	if os.Getenv("NIXMSG_DIR_SCALE") != "1" {
		t.Skip("设置 NIXMSG_DIR_SCALE=1 才跑目录规模测试")
	}
	n := 50
	if v := os.Getenv("NIXMSG_DIR_N"); v != "" {
		parsed, err := strconv.Atoi(v)
		if err != nil || parsed < 1 {
			t.Fatalf("NIXMSG_DIR_N=%q", v)
		}
		n = parsed
	}

	srv, err := harness.Start(harness.Options{})
	if err != nil {
		t.Fatal(err)
	}
	defer func() { _ = srv.Stop() }()

	ac := AdminLogin(t, srv)
	const password = "password1234"
	ids := make([]string, n)
	for i := 0; i < n; i++ {
		ids[i] = fmt.Sprintf("dir%05d", i)
		CreateEndpoint(t, ac, ids[i], password)
	}

	sessions := make([]*MQTTSession, n)
	for i, id := range ids {
		sessions[i] = MQTTLogin(t, srv.HTTPBase, id, password)
	}
	t.Cleanup(func() {
		for _, s := range sessions {
			if s != nil {
				s.Close()
			}
		}
	})

	start := time.Now()
	got := 0
	cursor := ""
	for page := 0; page < n+2; page++ {
		frame := map[string]any{
			"v": 1, "type": protocol.TypeDirectoryList, "rid": fmt.Sprintf("d%d", page),
			"limit": protocol.MaxPageLimit,
		}
		if cursor != "" {
			frame["cursor"] = cursor
		}
		resp := sessions[0].Request(t, frame)
		if !resp.OK {
			t.Fatalf("directory page %d: %+v", page, resp.Raw)
		}
		data, _ := resp.Data.(map[string]any)
		items, _ := data["items"].([]any)
		got += len(items)
		next, _ := data["next_cursor"].(string)
		if next == "" {
			break
		}
		cursor = next
	}
	elapsed := time.Since(start)
	if got < n {
		t.Fatalf("listed %d want at least %d in %s", got, n, elapsed)
	}
	t.Logf("F03c N=%d listed=%d elapsed=%s", n, got, elapsed)
}