package api

import (
	"context"
	"errors"
	"time"

	"connectrpc.com/connect"
	"github.com/mattn/go-sqlite3"
	"github.com/tigorlazuardi/bluemage/go/gen/models"
	"github.com/tigorlazuardi/bluemage/go/pkg/errs"
	"github.com/tigorlazuardi/bluemage/go/pkg/log"
	"github.com/tigorlazuardi/bluemage/go/pkg/telemetry"
	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/metric"
)

var (
	deviceCreatedCounter, _ = meter.Int64Counter("devices.created",
		metric.WithDescription("The number of devices have created."),
	)
	deviceCreatedHistogram, _ = meter.Int64Histogram(
		"devices.creating.duration",
		metric.WithDescription("The duration for creating devices."),
		metric.WithUnit("ms"),
	)
)

func (api *API) DevicesCreate(ctx context.Context, params *models.DeviceSetter) (device *models.Device, err error) {
	ctx, span := tracer.Start(ctx, "DevicesCreate")
	defer func() { telemetry.EndWithStatus(span, err) }()
	start := time.Now()

	ctx, coll := log.WithQueryCollector(ctx)
	api.lockf(func() {
		device, err = models.Devices.Insert(ctx, api.Executor, params)
	})
	if err != nil {
		if sqliteErr := new(sqlite3.Error); errors.As(err, sqliteErr) {
			if sqliteErr.Code == sqlite3.ErrConstraint {
				return nil, errs.
					Wrapw(sqliteErr, "device already exists", "params", params, "query", coll).
					Code(connect.CodeAlreadyExists)
			}
		}
		return nil, errs.
			Wrapw(err, "failed to create device",
				"params", params,
				"query", coll,
			)
	}
	dur := time.Since(start)
	deviceCreatedCounter.Add(ctx, 1,
		metric.WithAttributes(
			attribute.String("slug", params.Slug.GetOrZero()),
		))
	deviceCreatedHistogram.Record(ctx, dur.Milliseconds())
	return device, nil
}