package adapter

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

	"aiaa-notification-service/internal/config"
)

func TestNewSenderSafew(t *testing.T) {
	s, err := NewSender("safew", &config.SMTPConfig{}, nil)
	if err != nil {
		t.Fatalf("NewSender(safew): %v", err)
	}
	if s.Type() != "safew" {
		t.Fatalf("Type() = %q, want safew", s.Type())
	}
}

func TestSafeWSenderSendSuccess(t *testing.T) {
	var gotPath string
	var gotBody map[string]any
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotPath = r.URL.Path
		raw, _ := io.ReadAll(r.Body)
		if err := json.Unmarshal(raw, &gotBody); err != nil {
			t.Errorf("unmarshal request: %v", err)
		}
		w.Header().Set("Content-Type", "application/json")
		_, _ = w.Write([]byte(`{"ok":true,"result":{}}`))
	}))
	defer srv.Close()

	sender := &SafeWSender{apiBase: srv.URL}
	cfg, _ := json.Marshal(map[string]any{"token": "tok-1", "chat_id": "123456789"})
	if err := sender.Send("hello_world.", "price=1.5", cfg); err != nil {
		t.Fatalf("Send: %v", err)
	}
	if gotPath != "/bottok-1/sendMessage" {
		t.Fatalf("path = %q, want /bottok-1/sendMessage", gotPath)
	}
	if gotBody["chat_id"] != "123456789" {
		t.Fatalf("chat_id = %#v, want \"123456789\"", gotBody["chat_id"])
	}
	if gotBody["parse_mode"] != nil && gotBody["parse_mode"] != "" {
		t.Fatalf("parse_mode = %#v, want omitted/plain", gotBody["parse_mode"])
	}
	wantText := "price=1.5"
	if gotBody["text"] != wantText {
		t.Fatalf("text = %#v, want %#v", gotBody["text"], wantText)
	}
}

func TestSafeWSenderSendNumericChatID(t *testing.T) {
	var gotBody map[string]any
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		raw, _ := io.ReadAll(r.Body)
		_ = json.Unmarshal(raw, &gotBody)
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"ok":true}`))
	}))
	defer srv.Close()

	sender := &SafeWSender{apiBase: srv.URL}
	cfg := json.RawMessage(`{"token":"tok","chat_id":123456789}`)
	if err := sender.Send("t", "c", cfg); err != nil {
		t.Fatalf("Send: %v", err)
	}
	if gotBody["chat_id"] != "123456789" {
		t.Fatalf("chat_id = %#v, want string \"123456789\"", gotBody["chat_id"])
	}
}

func TestSafeWSenderSendOKFalse(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"ok":false,"description":"chat not found"}`))
	}))
	defer srv.Close()

	sender := &SafeWSender{apiBase: srv.URL}
	cfg, _ := json.Marshal(map[string]string{"token": "tok", "chat_id": "1"})
	err := sender.Send("t", "c", cfg)
	if err == nil {
		t.Fatal("expected error")
	}
	if !strings.Contains(err.Error(), "chat not found") {
		t.Fatalf("error %q should contain description", err)
	}
}

func TestSafeWSenderSendHTTPError(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusUnauthorized)
		_, _ = w.Write([]byte(`{"ok":false,"description":"Unauthorized"}`))
	}))
	defer srv.Close()

	sender := &SafeWSender{apiBase: srv.URL}
	cfg, _ := json.Marshal(map[string]string{"token": "bad", "chat_id": "1"})
	err := sender.Send("t", "c", cfg)
	if err == nil {
		t.Fatal("expected error")
	}
	if !strings.Contains(err.Error(), "Unauthorized") {
		t.Fatalf("error %q should contain description", err)
	}
}

func TestSafeWSenderSendMissingFields(t *testing.T) {
	hits := 0
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		hits++
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"ok":true}`))
	}))
	defer srv.Close()

	sender := &SafeWSender{apiBase: srv.URL}
	cases := []json.RawMessage{
		json.RawMessage(`{"chat_id":"1"}`),
		json.RawMessage(`{"token":"tok"}`),
		json.RawMessage(`{"token":"  ","chat_id":"1"}`),
		json.RawMessage(`{"token":"tok","chat_id":""}`),
		json.RawMessage(`{"token":"tok","chat_id":null}`),
	}
	for _, cfg := range cases {
		if err := sender.Send("t", "c", cfg); err == nil {
			t.Fatalf("expected error for config %s", cfg)
		}
	}
	if hits != 0 {
		t.Fatalf("unexpected HTTP calls: %d", hits)
	}

	if err := sender.Send("t", "c", json.RawMessage(`{`)); err == nil {
		t.Fatal("expected error for invalid json")
	}
	if hits != 0 {
		t.Fatalf("unexpected HTTP calls after invalid json: %d", hits)
	}
}