package fs_test

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

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

	"tildegit.org/tjp/gus"
	"tildegit.org/tjp/gus/contrib/fs"
	"tildegit.org/tjp/gus/gemini"
)

func TestDirectoryDefault(t *testing.T) {
	handler := fs.GeminiDirectoryDefault(os.DirFS("testdata"), "index.gmi")

	tests := []struct {
		url    string
		status gus.Status
		meta   string
		body   string
	}{
		{
			url:    "gemini://localhost/d",
			status: gemini.StatusPermanentRedirect,
			meta:   "gemini://localhost/d/",
		},
		{
			url:    "gemini://localhost/d/",
			status: gemini.StatusSuccess,
			meta:   "text/gemini",
			body:   "# This is d\n",
		},
		{
			url:    "gemini://localhost/a/",
			status: gemini.StatusNotFound,
		},
	}

	for _, test := range tests {
		t.Run(test.url, func(t *testing.T) {
			u, err := url.Parse(test.url)
			require.Nil(t, err)

			request := &gus.Request{URL: u}
			response := handler(context.Background(), request)

			if response == nil {
				assert.Equal(t, test.status, gemini.StatusNotFound)
				return
			} else {
				assert.Equal(t, test.status, response.Status)
			}

			if test.meta != "" {
				assert.Equal(t, test.meta, response.Meta)
			}
			if test.body != "" {
				body, err := io.ReadAll(response.Body)
				require.Nil(t, err)
				assert.Equal(t, test.body, string(body))
			}
		})
	}
}

func TestDirectoryListing(t *testing.T) {
	handler := fs.GeminiDirectoryListing(os.DirFS("testdata"), nil)

	tests := []struct {
		url    string
		status gus.Status
		meta   string
		body   string
	}{
		{
			url:    "gemini://localhost/",
			status: gemini.StatusSuccess,
			meta:   "text/gemini",
			body:   "# (root)\n\n=> a/\n=> d/\n=> ../\n",
		},
		{
			url:    "gemini://localhost/d",
			status: gemini.StatusPermanentRedirect,
			meta:   "gemini://localhost/d/",
		},
		{
			url:    "gemini://localhost/d/",
			status: gemini.StatusSuccess,
			meta:   "text/gemini",
			body:   "# d\n\n=> index.gmi\n=> ../\n",
		},
		{
			url:    "gemini://localhost/a/",
			status: gemini.StatusSuccess,
			meta:   "text/gemini",
			body:   "# a\n\n=> b\n=> c.html\n=> ../\n",
		},
	}

	for _, test := range tests {
		t.Run(test.url, func(t *testing.T) {
			u, err := url.Parse(test.url)
			require.Nil(t, err)

			request := &gus.Request{URL: u}
			response := handler(context.Background(), request)

			if response == nil {
				assert.Equal(t, test.status, gemini.StatusNotFound)
				return
			} else {
				assert.Equal(t, test.status, response.Status)
			}

			if test.meta != "" {
				assert.Equal(t, test.meta, response.Meta)
			}
			if test.body != "" {
				body, err := io.ReadAll(response.Body)
				require.Nil(t, err)
				assert.Equal(t, test.body, string(body))
			}
		})
	}
}