package pdf

import (
	"bytes"
	"strings"
	"testing"
	"time"

	"kereru.forms/internal/database"
)

func formFixture() *database.Form {
	now := time.Now()
	desc := "A short description"
	intro := "Welcome to the survey"
	email := "hello@example.com"
	placeholder := "Type here"
	multiline := true
	return &database.Form{
		ID:           "11111111-1111-1111-1111-111111111111",
		FormGroupID:  "22222222-2222-2222-2222-222222222222",
		Version:      3,
		Title:        "Kererū feedback",
		Description:  &desc,
		Introduction: &intro,
		IsActive:     true,
		ContactEmail: &email,
		CreatedAt:    now,
		UpdatedAt:    now,
		Questions: []database.Question{
			{ID: "1", Key: "name", Label: "Your name", Type: "text", Required: true, Placeholder: &placeholder},
			{ID: "2", Key: "notes", Label: "Notes", Type: "text", Multiline: multiline},
			{ID: "3", Key: "happy", Label: "Happy?", Type: "boolean"},
			{ID: "4", Key: "score", Label: "Score", Type: "number", MinValue: floatPtr(1), MaxValue: floatPtr(5)},
			{ID: "5", Key: "colour", Label: "Colour", Type: "select", Options: []database.QuestionOption{
				{Value: "red", Label: "Red"},
				{Value: "blue", Label: "Blue"},
			}},
			{ID: "6", Key: "when", Label: "When", Type: "date", Required: true},
		},
	}
}

func floatPtr(f float64) *float64 { return &f }

func TestGenerate(t *testing.T) {
	data, err := Generate(formFixture())
	if err != nil {
		t.Fatalf("Generate: %v", err)
	}
	if len(data) < 500 {
		t.Fatalf("pdf is suspiciously small: %d bytes", len(data))
	}
	if !bytes.HasPrefix(data, []byte("%PDF")) {
		t.Fatal("output does not start with %PDF")
	}
	if !bytes.Contains(data, []byte("%%EOF")) {
		t.Fatal("output does not contain the EOF marker")
	}
}

func TestSanitize(t *testing.T) {
	got := sanitize("Kererū — “quoted” …")
	if strings.ContainsAny(got, "ū—") {
		t.Fatalf("sanitize left unsupported characters: %q", got)
	}
	if got != `Kereru - "quoted" ...` {
		t.Fatalf("sanitize = %q", got)
	}
}

func TestGenerateNil(t *testing.T) {
	if _, err := Generate(nil); err == nil {
		t.Fatal("expected error for nil form")
	}
}