// SPDX-License-Identifier: EUPL-1.2

package api_test

import (
	"encoding/json"
	"io"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"

	api "forge.lthn.ai/core/go-api"
)

// ── Swagger endpoint ────────────────────────────────────────────────────

func TestSwaggerEndpoint_Good(t *testing.T) {
	gin.SetMode(gin.TestMode)

	e, err := api.New(api.WithSwagger("Test API", "A test API service", "1.0.0"))
	if err != nil {
		t.Fatalf("unexpected error: %v", err)
	}

	// Use a real test server because gin-swagger reads RequestURI
	// which is not populated by httptest.NewRecorder.
	srv := httptest.NewServer(e.Handler())
	defer srv.Close()

	resp, err := http.Get(srv.URL + "/swagger/doc.json")
	if err != nil {
		t.Fatalf("request failed: %v", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		t.Fatalf("expected 200, got %d", resp.StatusCode)
	}

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		t.Fatalf("failed to read body: %v", err)
	}
	if len(body) == 0 {
		t.Fatal("expected non-empty response body")
	}

	// Verify the body is valid JSON with expected fields.
	var doc map[string]any
	if err := json.Unmarshal(body, &doc); err != nil {
		t.Fatalf("expected valid JSON, got unmarshal error: %v", err)
	}

	info, ok := doc["info"].(map[string]any)
	if !ok {
		t.Fatal("expected 'info' object in swagger doc")
	}
	if info["title"] != "Test API" {
		t.Fatalf("expected title=%q, got %q", "Test API", info["title"])
	}
	if info["version"] != "1.0.0" {
		t.Fatalf("expected version=%q, got %q", "1.0.0", info["version"])
	}
}

func TestSwaggerDisabledByDefault_Good(t *testing.T) {
	gin.SetMode(gin.TestMode)

	// Without WithSwagger, GET /swagger/doc.json should return 404.
	e, _ := api.New()

	h := e.Handler()
	w := httptest.NewRecorder()
	req, _ := http.NewRequest(http.MethodGet, "/swagger/doc.json", nil)
	h.ServeHTTP(w, req)

	if w.Code != http.StatusNotFound {
		t.Fatalf("expected 404 for /swagger/doc.json without WithSwagger, got %d", w.Code)
	}
}