package main

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestFetch(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		w.Header().Set("X-Custom-Header", "test-value")
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"status":"ok","message":"Hello from httptest"}`))
	}))
	defer server.Close()

	result, err := Fetch(server.URL, nil)
	require.NoError(t, err)

	assert.True(t, result.OK)
	assert.Equal(t, http.StatusOK, result.Status)
	assert.Contains(t, result.Body, "Hello from httptest")
	assert.Contains(t, result.Body, `"status":"ok"`)
	assert.Equal(t, "application/json", result.Headers["Content-Type"])
	assert.Equal(t, "test-value", result.Headers["X-Custom-Header"])
}

func TestFetchHTTPBin(t *testing.T) {
	result, err := Fetch("https://httpbin.org/get", nil)
	require.NoError(t, err)

	assert.True(t, result.OK)
	assert.Equal(t, http.StatusOK, result.Status)
	assert.Contains(t, result.Body, `"args"`)
	assert.Equal(t, "application/json", result.Headers["Content-Type"])
}

func TestFetchWith404(t *testing.T) {
	result, err := Fetch("https://httpbin.org/status/404", nil)
	require.NoError(t, err)

	assert.False(t, result.OK)
	assert.Equal(t, http.StatusNotFound, result.Status)
}

func TestFetchWithInvalidURL(t *testing.T) {
	_, err := Fetch("http://this-domain-does-not-exist-12345.com", nil)
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "failed to fetch")
}

func TestFetchBuiltinIntegration(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "text/plain")
		w.Header().Set("X-Custom", "custom-value")
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte("Hello, World!"))
	}))
	defer server.Close()

	var stdout, stderr strings.Builder
	tsContent := `
		const response = fetch("${URL}");
		console.log("OK:", response.ok);
		console.log("Status:", response.status);
		console.log("Body:", response.text());

		console.log("Content-Type:", response.headers.get("content-type") || "undefined");
		console.log("Content-Type (case sensitive):", response.headers.get("Content-Type") || "undefined");
		console.log("X-Custom:", response.headers.get("x-custom") || "undefined");
		console.log("X-Custom (case sensitive):", response.headers.get("X-Custom") || "undefined");
	`
	tsContent = strings.Replace(tsContent, "${URL}", server.URL, 1)

	err := executeTypeScriptContent(tsContent, &stdout, &stderr)
	require.NoError(t, err)
	require.Empty(t, stderr.String(), "Expected no error output")

	output := stdout.String()
	assert.Contains(t, output, "OK: true")
	assert.Contains(t, output, "Status: 200")
	assert.Contains(t, output, "Body: Hello, World!")
}