package notification

import (
	"strings"
	"testing"
)

func TestRenderAllTemplates(t *testing.T) {
	tpls, err := NewTemplates()
	if err != nil {
		t.Fatalf("NewTemplates: %v", err)
	}

	cases := []struct {
		name     TemplateName
		data     map[string]any
		wantHTML []string // substrings expected in HTML body
		wantText []string // substrings expected in text body
	}{
		{
			name: TmplVerification,
			data: map[string]any{
				"Name":            "Kay",
				"Link":            "https://example.test/verify-email?token=x",
				"Subject":         "Verify your GuestGuard email",
				"UnsubscribeLink": "https://example.test/unsubscribe/abc",
			},
			wantHTML: []string{"Verify your email", "Kay", "Verify email", "https://example.test/verify-email?token=x", "unsubscribe here"},
			wantText: []string{"Hi Kay", "https://example.test/verify-email?token=x"},
		},
		{
			name: TmplPasswordReset,
			data: map[string]any{
				"Name":         "Kay",
				"Link":         "https://example.test/reset-password/abc",
				"ExpiryHumane": "1 hour",
			},
			wantHTML: []string{"Reset your password", "1 hour", "https://example.test/reset-password/abc"},
			wantText: []string{"reset your GuestGuard password", "1 hour"},
		},
		{
			name: TmplInvitation,
			data: map[string]any{
				"GuestName": "Mira",
				"HostName":  "Kay",
				"EventName": "Beach Day",
				"Venue":     "Ocean Park",
				"EventDate": "Sat 14 Jun, 4pm",
				"Link":      "https://example.test/rsvp/tok_x",
			},
			wantHTML: []string{"You're invited", "Beach Day", "Mira", "Ocean Park", "RSVP now", "https://example.test/rsvp/tok_x"},
			wantText: []string{"Beach Day", "Mira", "RSVP here", "https://example.test/rsvp/tok_x"},
		},
		{
			name: TmplConfirmation,
			data: map[string]any{
				"GuestName": "Mira",
				"HostName":  "Kay",
				"EventName": "Beach Day",
				"Venue":     "Ocean Park",
				"EventDate": "Sat 14 Jun, 4pm",
				"Response":  "attending",
				"PlusOnes":  2,
			},
			wantHTML: []string{"RSVP received", "Beach Day", "attending", "2 plus-ones"},
			wantText: []string{"Beach Day", "attending", "+2"},
		},
		{
			name: TmplReminder,
			data: map[string]any{
				"GuestName": "Mira",
				"EventName": "Beach Day",
				"EventDate": "Sat 14 Jun, 4pm",
				"Venue":     "Ocean Park",
				"Response":  "attending",
				"PlusOnes":  1,
			},
			wantHTML: []string{"Reminder", "Beach Day", "Ocean Park", "1 plus-one"},
			wantText: []string{"Reminder", "Beach Day", "(+1)"},
		},
	}

	for _, tc := range cases {
		t.Run(string(tc.name), func(t *testing.T) {
			html, text, err := tpls.Render(tc.name, tc.data)
			if err != nil {
				t.Fatalf("render: %v", err)
			}
			for _, s := range tc.wantHTML {
				if !strings.Contains(html, s) {
					t.Errorf("html missing %q\n---\n%s", s, html)
				}
			}
			for _, s := range tc.wantText {
				if !strings.Contains(text, s) {
					t.Errorf("text missing %q\n---\n%s", s, text)
				}
			}
		})
	}
}