package admin

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

func TestListAccountsPageSizeCapIs5000(t *testing.T) {
	accounts := make([]string, 0, 150)
	for i := range 150 {
		accounts = append(accounts, fmt.Sprintf(`{"email":"u%d@example.com","password":"pwd"}`, i))
	}
	raw := fmt.Sprintf(`{"accounts":[%s]}`, strings.Join(accounts, ","))
	router := newHTTPAdminHarness(t, raw, &testingDSMock{})

	rec := httptest.NewRecorder()
	router.ServeHTTP(rec, adminReq(http.MethodGet, "/accounts?page=1&page_size=200", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("unexpected status: %d body=%s", rec.Code, rec.Body.String())
	}
	var payload map[string]any
	if err := json.Unmarshal(rec.Body.Bytes(), &payload); err != nil {
		t.Fatalf("decode response: %v", err)
	}
	items, _ := payload["items"].([]any)
	if len(items) != 150 {
		t.Fatalf("expected all 150 accounts with page_size=200, got %d", len(items))
	}
	if ps, _ := payload["page_size"].(float64); ps != 200 {
		t.Fatalf("expected page_size=200 in response, got %v", payload["page_size"])
	}
}

func TestListAccountsPageSizeAbove5000ClampedTo5000(t *testing.T) {
	router := newHTTPAdminHarness(t, `{"accounts":[{"email":"u@example.com","password":"pwd"}]}`, &testingDSMock{})

	rec := httptest.NewRecorder()
	router.ServeHTTP(rec, adminReq(http.MethodGet, "/accounts?page=1&page_size=9999", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("unexpected status: %d body=%s", rec.Code, rec.Body.String())
	}
	var payload map[string]any
	if err := json.Unmarshal(rec.Body.Bytes(), &payload); err != nil {
		t.Fatalf("decode response: %v", err)
	}
	if ps, _ := payload["page_size"].(float64); ps != 5000 {
		t.Fatalf("expected page_size clamped to 5000, got %v", payload["page_size"])
	}
}