package main

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

type fakeWellKnownGetter struct {
	reg wkRegistry
}

func (f *fakeWellKnownGetter) GetData(ctx context.Context) (wkRegistry, error) {
	return f.reg, nil
}

func Test_GetServer_JSON(t *testing.T) {
	wks := &fakeWellKnownGetter{
		reg: wkRegistry{
			"test": map[string]interface{}{
				"data": map[string]interface{}{
					"key": "value",
				},
				"format": "json",
			},
			"empty": map[string]interface{}{
				"data":   map[string]interface{}{},
				"format": "json",
			},
			"level1/level2": map[string]interface{}{
				"data": map[string]interface{}{
					"nestedKey": "nestedValue",
				},
				"format": "json",
			},
		},
	}

	tt := []struct {
		name         string
		path         string
		expectedBody string
		expectedCT   string
		code         int
	}{
		{
			name:         "existing",
			path:         "/.well-known/test",
			expectedBody: `{"key":"value"}`,
			expectedCT:   "application/json",
			code:         http.StatusOK,
		},
	}

	server := GetServer(wks)
	for _, tc := range tt {
		t.Run(tc.name, func(t *testing.T) {
			req := httptest.NewRequest("GET", tc.path, nil)
			w := httptest.NewRecorder()
			server.ServeHTTP(w, req)

			if w.Code != tc.code {
				t.Errorf("Expected status code %d, got %d", tc.code, w.Code)
			}

			if strings.TrimSpace(w.Body.String()) != tc.expectedBody {
				t.Errorf("Expected body %q, got %q", tc.expectedBody, w.Body.String())
			}

			if ct := w.Header().Get("Content-Type"); ct != tc.expectedCT {
				t.Errorf("Expected Content-Type %s, got %s", tc.expectedCT, ct)
			}
		})
	}
}

func Test_GetServer_PlainText_Expanded(t *testing.T) {
	wks := &fakeWellKnownGetter{
		reg: wkRegistry{
			"security.txt": map[string]interface{}{
				"data": []string{
					"Contact: mailto:security@example.com",
					"Contact: mailto:security%2Buri%2Bencoded@example.com",
					"Contact: tel:+1-201-555-0123",
					"Contact: https://example.com/security-contact.html",
					"This is just another comment",
				},
				"format": "text",
			},
			"empty.txt": map[string]interface{}{
				"data":   []string{},
				"format": "text",
			},
			"largefile.txt": map[string]interface{}{
				"data": []string{
					"Line 1",
					"Line 2",
					"Line 3",
					"Line 4",
					"Line 5",
				},
				"format": "text",
			},
		},
	}

	tt := []struct {
		name         string
		path         string
		expectedBody string
		expectedCT   string
		code         int
	}{
		{
			name: "plaintext well-known file",
			path: "/.well-known/security.txt",
			expectedBody: `Contact: mailto:security@example.com
Contact: mailto:security%2Buri%2Bencoded@example.com
Contact: tel:+1-201-555-0123
Contact: https://example.com/security-contact.html
This is just another comment`,
			expectedCT: "text/plain; charset=utf-8",
			code:       http.StatusOK,
		},
		{
			name:         "empty plaintext file",
			path:         "/.well-known/empty.txt",
			expectedBody: "",
			expectedCT:   "text/plain; charset=utf-8",
			code:         http.StatusOK,
		},
		{
			name:         "large plaintext file",
			path:         "/.well-known/largefile.txt",
			expectedBody: "Line 1\nLine 2\nLine 3\nLine 4\nLine 5", // Expected content for large files.
			expectedCT:   "text/plain; charset=utf-8",
			code:         http.StatusOK,
		},
		{
			name:         "non-existing plaintext file",
			path:         "/.well-known/non-existing.txt",
			expectedBody: "Not found\n",
			expectedCT:   "text/plain; charset=utf-8",
			code:         http.StatusNotFound,
		},
	}

	server := GetServer(wks)
	for _, tc := range tt {
		t.Run(tc.name, func(t *testing.T) {
			req := httptest.NewRequest("GET", tc.path, nil)
			req.Header.Set("Accept", "text/plain")
			w := httptest.NewRecorder()
			server.ServeHTTP(w, req)

			if w.Code != tc.code {
				t.Errorf("Expected status code %d, got %d", tc.code, w.Code)
			}

			if w.Body.String() != tc.expectedBody {
				t.Errorf("Expected body %q, got %q", tc.expectedBody, w.Body.String())
			}

			if ct := w.Header().Get("Content-Type"); ct != tc.expectedCT {
				t.Errorf("Expected Content-Type %s, got %s", tc.expectedCT, ct)
			}
		})
	}
}