package httpx_test

import (
	"context"
	"io"
	"net/http"
	"net/url"
	"testing"

	"git.codelab.vc/pkg/httpx"
)

func TestNewFormRequest(t *testing.T) {
	t.Run("body is form-encoded", func(t *testing.T) {
		values := url.Values{"username": {"alice"}, "scope": {"read"}}
		req, err := httpx.NewFormRequest(context.Background(), http.MethodPost, "http://example.com/token", values)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}

		body, err := io.ReadAll(req.Body)
		if err != nil {
			t.Fatalf("reading body: %v", err)
		}

		parsed, err := url.ParseQuery(string(body))
		if err != nil {
			t.Fatalf("parsing form: %v", err)
		}
		if parsed.Get("username") != "alice" {
			t.Errorf("username = %q, want %q", parsed.Get("username"), "alice")
		}
		if parsed.Get("scope") != "read" {
			t.Errorf("scope = %q, want %q", parsed.Get("scope"), "read")
		}
	})

	t.Run("content type is set", func(t *testing.T) {
		values := url.Values{"key": {"value"}}
		req, err := httpx.NewFormRequest(context.Background(), http.MethodPost, "http://example.com", values)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}

		ct := req.Header.Get("Content-Type")
		if ct != "application/x-www-form-urlencoded" {
			t.Errorf("Content-Type = %q, want %q", ct, "application/x-www-form-urlencoded")
		}
	})

	t.Run("GetBody works for retry", func(t *testing.T) {
		values := url.Values{"key": {"value"}}
		req, err := httpx.NewFormRequest(context.Background(), http.MethodPost, "http://example.com", values)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}

		if req.GetBody == nil {
			t.Fatal("GetBody is nil")
		}

		b1, err := io.ReadAll(req.Body)
		if err != nil {
			t.Fatalf("reading body: %v", err)
		}

		body2, err := req.GetBody()
		if err != nil {
			t.Fatalf("GetBody(): %v", err)
		}
		b2, err := io.ReadAll(body2)
		if err != nil {
			t.Fatalf("reading body2: %v", err)
		}

		if string(b1) != string(b2) {
			t.Errorf("GetBody returned different data: %q vs %q", b1, b2)
		}
	})
}