package api

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

	"git.fabledsword.com/bvandeusen/minstrel/internal/library"
)

func TestGetFingerprintSettings_ServesDefaultsWithoutAService(t *testing.T) {
	h := &handlers{logger: slog.New(slog.NewTextHandler(io.Discard, nil))}
	rec := httptest.NewRecorder()
	h.handleGetFingerprintSettings(rec, httptest.NewRequest(http.MethodGet, "/api/admin/library/fingerprint-settings", nil))
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d, want 200", rec.Code)
	}
	var got fingerprintSettingsBody
	if err := json.NewDecoder(rec.Body).Decode(&got); err != nil {
		t.Fatalf("decode: %v", err)
	}
	if want := fingerprintSettingsBodyOf(library.DefaultFingerprintSettings); got != want {
		t.Fatalf("body = %+v, want the defaults %+v", got, want)
	}
}

func TestUpdateFingerprintSettings_Rejects(t *testing.T) {
	h := &handlers{logger: slog.New(slog.NewTextHandler(io.Discard, nil))}
	for name, tc := range map[string]struct {
		body     string
		code     string
		mentions string
	}{
		"a value out of range, naming the field": {
			body:     `{"enabled":true,"chromaprint_length_sec":5,"acoustic_max_bit_error_rate":0.15,"backfill_concurrency":2,"sweep_interval_hours":1}`,
			code:     "invalid_setting",
			mentions: "chromaprint_length_sec",
		},
		// A partial body would otherwise zero every field it left out.
		"a body missing fields": {body: `{"enabled":false}`, code: "invalid_setting"},
		"malformed JSON":        {body: `{"enabled":`, code: "invalid_body"},
	} {
		rec := httptest.NewRecorder()
		h.handleUpdateFingerprintSettings(rec, httptest.NewRequest(
			http.MethodPut, "/api/admin/library/fingerprint-settings", strings.NewReader(tc.body)))
		body := rec.Body.String()
		if rec.Code != http.StatusBadRequest || !strings.Contains(body, `"`+tc.code+`"`) || !strings.Contains(body, tc.mentions) {
			t.Errorf("%s: status %d body %s; want 400 %s mentioning %q", name, rec.Code, body, tc.code, tc.mentions)
		}
	}
}