package main

// 🤖 donate_test.go — the /donate checkout (donate.go): mint path, amount
// bounds, CORS scoping, and the off-until-keyed posture.

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

func donateTestCloud(t *testing.T) (*httptest.Server, *cloudServer, *url.Values) {
	t.Helper()
	stripe, captured := fakeStripe(t)
	srv, s := newTestCloud(t, okControl(t))
	s.donate = newDonateCheckout("sk_test_donate", stripe.URL, "https://elevenmessenger.com")
	return srv, s, captured
}

func postDonate(t *testing.T, srv *httptest.Server, body map[string]any) *http.Response {
	t.Helper()
	raw, _ := json.Marshal(body)
	resp, err := http.Post(srv.URL+"/api/donate/checkout", "application/json", bytes.NewReader(raw))
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { resp.Body.Close() })
	return resp
}

func TestDonateCheckoutMintsSession(t *testing.T) {
	srv, _, captured := donateTestCloud(t)

	resp := postDonate(t, srv, map[string]any{"amount_minor": 1100, "currency": "eur"})
	if resp.StatusCode != http.StatusOK {
		t.Fatalf("status = %d, want 200", resp.StatusCode)
	}
	if u, _ := decodeBody(t, resp)["url"].(string); !strings.Contains(u, "checkout.stripe.com") {
		t.Errorf("url = %q", u)
	}
	if got := resp.Header.Get("Access-Control-Allow-Origin"); got != "https://elevenmessenger.com" {
		t.Errorf("CORS origin = %q", got)
	}
	f := *captured
	if f.Get("mode") != "payment" || f.Get("line_items[0][price_data][unit_amount]") != "1100" ||
		f.Get("line_items[0][price_data][currency]") != "eur" {
		t.Errorf("form = %v", f)
	}
	if !strings.HasSuffix(f.Get("success_url"), "/donate/?thanks=1") || !strings.HasSuffix(f.Get("cancel_url"), "/donate/") {
		t.Errorf("redirects = %q / %q", f.Get("success_url"), f.Get("cancel_url"))
	}
	for k := range f {
		if strings.Contains(k, "customer") || strings.Contains(k, "email") {
			t.Errorf("donation form leaks a customer field: %s", k)
		}
	}
}

func TestDonateCheckoutValidation(t *testing.T) {
	srv, _, _ := donateTestCloud(t)
	for name, body := range map[string]map[string]any{
		"below the €1.10 floor": {"amount_minor": 109, "currency": "eur"},
		"zero":                  {"amount_minor": 0, "currency": "eur"},
		"over the Stripe cap":   {"amount_minor": 100_000_000, "currency": "eur"},
		"bad currency":          {"amount_minor": 1100, "currency": "chf"},
	} {
		if resp := postDonate(t, srv, body); resp.StatusCode != http.StatusBadRequest {
			t.Errorf("%s: status = %d, want 400", name, resp.StatusCode)
		}
	}
}

func TestDonateCheckoutUnconfigured(t *testing.T) {
	srv, s, _ := donateTestCloud(t)
	s.donate = nil
	if resp := postDonate(t, srv, map[string]any{"amount_minor": 1100, "currency": "eur"}); resp.StatusCode != http.StatusNotImplemented {
		t.Fatalf("status = %d, want 501 when unkeyed", resp.StatusCode)
	}
	req, _ := http.NewRequest("OPTIONS", srv.URL+"/api/donate/checkout", nil)
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		t.Fatal(err)
	}
	defer resp.Body.Close()
	if resp.StatusCode != http.StatusNotImplemented {
		t.Errorf("preflight unkeyed: %d, want 501", resp.StatusCode)
	}
}