package infra

import (
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
	"time"
)

func TestHttpGetJSON(t *testing.T) {
	t.Run("httptest.Server con respuesta JSON", func(t *testing.T) {
		payload := map[string]any{"ok": true, "value": float64(42)}
		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			w.Header().Set("Content-Type", "application/json")
			json.NewEncoder(w).Encode(payload)
		}))
		defer srv.Close()

		result, err := HttpGetJSON(srv.URL, nil, 5*time.Second)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		if result["ok"] != true {
			t.Errorf("got ok=%v, want true", result["ok"])
		}
	})

	t.Run("Status 404 → error", func(t *testing.T) {
		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			http.Error(w, "not found", http.StatusNotFound)
		}))
		defer srv.Close()

		_, err := HttpGetJSON(srv.URL, nil, 5*time.Second)
		if err == nil {
			t.Fatal("expected error, got nil")
		}
		if !strings.Contains(err.Error(), "404") {
			t.Errorf("error should contain 404, got: %v", err)
		}
	})

	t.Run("Timeout → error", func(t *testing.T) {
		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			// No responde — bloquea hasta que el cliente cancela
			<-r.Context().Done()
		}))
		defer srv.Close()

		_, err := HttpGetJSON(srv.URL, nil, 50*time.Millisecond)
		if err == nil {
			t.Fatal("expected timeout error, got nil")
		}
	})

	t.Run("Headers custom", func(t *testing.T) {
		receivedHeaders := make(chan http.Header, 1)
		srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			receivedHeaders <- r.Header.Clone()
			w.Header().Set("Content-Type", "application/json")
			w.Write([]byte(`{}`))
		}))
		defer srv.Close()

		headers := map[string]string{"X-Api-Key": "mytoken"}
		_, err := HttpGetJSON(srv.URL, headers, 5*time.Second)
		if err != nil {
			t.Fatalf("unexpected error: %v", err)
		}
		h := <-receivedHeaders
		if h.Get("X-Api-Key") != "mytoken" {
			t.Errorf("X-Api-Key not sent, got: %v", h.Get("X-Api-Key"))
		}
		if h.Get("Accept") != "application/json" {
			t.Errorf("Accept header missing, got: %v", h.Get("Accept"))
		}
	})
}