package arr

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

func TestUpdateKeepsUnknownFields(t *testing.T) {
	var put map[string]any
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/api/v3/movie/7" {
			t.Errorf("path %s", r.URL.Path)
		}
		switch r.Method {
		case http.MethodGet:
			io.WriteString(w, `{"id":7,"monitored":true,"customThing":{"a":[1,2]},"seasons":[{"seasonNumber":1,"monitored":true,"x":1},{"seasonNumber":2,"monitored":true}]}`)
		case http.MethodPut:
			json.NewDecoder(r.Body).Decode(&put)
		}
	}))
	defer srv.Close()

	err := NewClient(srv.URL, "k").Update(context.Background(), "movie", 7, func(o map[string]json.RawMessage) error {
		SetBool(o, "monitored", false)
		return SetSeasonMonitored(o, 2, false)
	})
	if err != nil {
		t.Fatal(err)
	}
	if put["monitored"] != false || put["customThing"] == nil {
		t.Errorf("put = %v", put)
	}
	seasons := put["seasons"].([]any)
	if seasons[0].(map[string]any)["monitored"] != true || seasons[1].(map[string]any)["monitored"] != false || seasons[0].(map[string]any)["x"] == nil {
		t.Errorf("seasons = %v", seasons)
	}
}

func TestSetSeasonMonitoredUnknownSeason(t *testing.T) {
	obj := map[string]json.RawMessage{"seasons": json.RawMessage(`[{"seasonNumber":1,"monitored":true}]`)}
	if err := SetSeasonMonitored(obj, 5, true); err == nil {
		t.Error("want error")
	}
}

func TestReconfigureSwitchesInstanceAndKey(t *testing.T) {
	var gotKey, gotHost string
	mk := func(host string) *httptest.Server {
		return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			gotKey, gotHost = r.Header.Get("X-Api-Key"), host
			io.WriteString(w, `{"version":"1"}`)
		}))
	}
	a, b := mk("a"), mk("b")
	defer a.Close()
	defer b.Close()

	c := NewClient(a.URL, "key-a")
	var out struct{ Version string }
	if err := c.Do(context.Background(), http.MethodGet, "system/status", nil, nil, &out); err != nil || gotHost != "a" || gotKey != "key-a" {
		t.Fatalf("before: host=%q key=%q err=%v", gotHost, gotKey, err)
	}
	c.Reconfigure(b.URL+"/", "key-b") // a trailing slash is trimmed like in NewClient
	if err := c.Do(context.Background(), http.MethodGet, "system/status", nil, nil, &out); err != nil || gotHost != "b" || gotKey != "key-b" {
		t.Fatalf("after: host=%q key=%q err=%v", gotHost, gotKey, err)
	}
	// Used from many goroutines while being changed (run with -race to see it matter).
	done := make(chan bool)
	go func() {
		for i := 0; i < 50; i++ {
			c.Reconfigure(a.URL, "k")
			c.Reconfigure(b.URL, "k")
		}
		done <- true
	}()
	for i := 0; i < 50; i++ {
		_ = c.Do(context.Background(), http.MethodGet, "system/status", nil, nil, &out)
	}
	<-done
}