package localapi

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

type fixedLine struct {
	mbps float64
	ok   bool
}

func (f fixedLine) Value() (float64, time.Time, bool) {
	return f.mbps, time.Date(2026, 10, 24, 6, 31, 0, 0, time.UTC), f.ok
}

func lineTestBody(t *testing.T, s *Server) LineTestResponse {
	t.Helper()
	rec := httptest.NewRecorder()
	s.handleLineTest(rec, httptest.NewRequest("GET", "/host/line-test", nil), 9201)
	var env struct {
		OK   bool             `json:"ok"`
		Data LineTestResponse `json:"data"`
	}
	if err := json.Unmarshal(rec.Body.Bytes(), &env); err != nil {
		t.Fatalf("decode %q: %v", rec.Body.String(), err)
	}
	return env.Data
}

// R-1247: the controller sets qBittorrent's limit only from a PRESENT value; never measured and not wired must both
// read present:false, never a zero line.
func TestLineTestRoute(t *testing.T) {
	s := &Server{logger: slog.Default()}
	if got := lineTestBody(t, s); got.Present {
		t.Fatalf("not wired: %+v, want present:false", got)
	}
	s.SetLineTest(fixedLine{ok: false})
	if got := lineTestBody(t, s); got.Present || got.Mbps != 0 {
		t.Fatalf("never measured: %+v, want present:false", got)
	}
	s.SetLineTest(fixedLine{mbps: 90.7, ok: true})
	got := lineTestBody(t, s)
	if !got.Present || got.Mbps != 90.7 || got.Method != "iperf3-tunnel" || !strings.HasPrefix(got.MeasuredAt, "2026-10-24T06:31") {
		t.Fatalf("measured: %+v", got)
	}
}