package environment

import (
	"context"
	"fmt"
	"math"
	"net/http"
	"net/http/httptest"
	"sync/atomic"
	"testing"
)

func TestLookupMunicipalityAndCache(t *testing.T) {
	var calls atomic.Int32
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		calls.Add(1)
		if r.URL.Query().Get("key") != "test-key" {
			t.Error("key missing")
		}
		switch r.URL.Path {
		case "/v3/geocode/regeo":
			if r.URL.Query().Get("location") != "121.473700,31.230400" {
				t.Errorf("wrong coordinate order: %s", r.URL.Query().Get("location"))
			}
			fmt.Fprint(w, `{"status":"1","regeocode":{"addressComponent":{"province":"上海市","city":[],"district":"黄浦区","adcode":"310101"}}}`)
		case "/v3/weather/weatherInfo":
			if r.URL.Query().Get("city") != "310101" {
				t.Error("weather must use adcode")
			}
			fmt.Fprint(w, `{"status":"1","lives":[{"weather":"晴","temperature":"24","reporttime":"2026-10-04 10:00:00"}]}`)
		default:
			t.Error("unexpected path")
		}
	}))
	defer srv.Close()
	client := New("test-key")
	client.baseURL = srv.URL
	for range 2 {
		result, err := client.Lookup(context.Background(), 31.2304, 121.4737)
		if err != nil {
			t.Fatal(err)
		}
		if result.LocationName != "上海市 · 黄浦区" || result.Weather == nil || result.Weather.Temperature != "24" {
			t.Fatalf("unexpected result: %+v", result)
		}
	}
	if calls.Load() != 2 {
		t.Errorf("cache did not reduce calls: %d", calls.Load())
	}
}
func TestPartialWeatherFailure(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/v3/geocode/regeo" {
			fmt.Fprint(w, `{"status":"1","regeocode":{"addressComponent":{"province":"浙江省","city":"杭州市","district":"西湖区","adcode":"330106"}}}`)
		} else {
			fmt.Fprint(w, `{"status":"0","info":"INVALID_USER_KEY"}`)
		}
	}))
	defer srv.Close()
	client := New("test-key")
	client.baseURL = srv.URL
	result, err := client.Lookup(context.Background(), 30.2, 120.1)
	if err != nil || result.LocationName != "杭州市 · 西湖区" || result.Weather != nil {
		t.Fatalf("must retain city without fabricated weather: %+v %v", result, err)
	}
}
func TestInvalidInputsAndProviderError(t *testing.T) {
	client := New("")
	if _, err := client.Lookup(context.Background(), 30, 120); err != ErrNotConfigured {
		t.Fatal(err)
	}
	for _, latitude := range []float64{91, math.NaN(), math.Inf(1)} {
		if _, err := client.Lookup(context.Background(), latitude, 120); err != ErrCoordinates {
			t.Fatal(err)
		}
	}
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprint(w, `{"status":"0","info":"INVALID_USER_KEY"}`)
	}))
	defer srv.Close()
	client = New("secret-key")
	client.baseURL = srv.URL
	if _, err := client.Lookup(context.Background(), 30, 120); err == nil {
		t.Fatal("provider rejection accepted")
	}
}