// Copyright 2019 Yunion
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package tsdb

import api "yunion.io/x/onecloud/pkg/apis/monitor"

type TsdbQuery struct {
	TimeRange *TimeRange
	Queries   []*Query
	Debug     bool
}

type Query struct {
	RefId string
	api.MetricQuery
	DataSource    DataSource
	MaxDataPoints int64
	IntervalMs    int64
}

type Response struct {
	Results map[string]*QueryResult `json:"results"`
	Message string                  `json:"message,omitempty"`
}

type QueryResultMeta struct {
	RawQuery string `json:"raw_query"`
}

type QueryResult struct {
	Error       error           `json:"-"`
	ErrorString string          `json:"error,omitempty"`
	RefId       string          `json:"ref_id"`
	Meta        QueryResultMeta `json:"meta"`
	Series      TimeSeriesSlice `json:"series"`
	Tables      []*Table        `json:"tables"`
	Dataframes  [][]byte        `json:"dataframes"`
}

type TimeSeries struct {
	RawName string            `json:"raw_name"`
	Name    string            `json:"name"`
	Points  TimeSeriesPoints  `json:"points"`
	Tags    map[string]string `json:"tags,omitempty"`
}

type Table struct {
	Columns []TableColumn `json:"columns"`
	Rows    []RowValues   `json:"rows"`
}

type TableColumn struct {
	Text string `json:"text"`
}

type RowValues []interface{}
type TimePoint [2]interface{}
type TimeSeriesPoints []TimePoint
type TimeSeriesSlice []*TimeSeries

func NewQueryResult() *QueryResult {
	return &QueryResult{
		Series: make(TimeSeriesSlice, 0),
	}
}

func NewTimePoint(value *float64, timestamp float64) TimePoint {
	return TimePoint{value, timestamp}
}

func NewTimePointByVal(value float64, timestamp float64) TimePoint {
	return NewTimePoint(&value, timestamp)
}

func (p TimePoint) IsValid() bool {
	return p[0].(*float64) != nil
}

func (p TimePoint) Value() float64 {
	return *(p[0].(*float64))
}

func (p TimePoint) Timestamp() float64 {
	return p[1].(float64)
}

func NewTimeSeriesPointsFromArgs(values ...float64) TimeSeriesPoints {
	points := make(TimeSeriesPoints, 0)

	for i := 0; i < len(values); i += 2 {
		points = append(points, NewTimePoint(&values[i], values[i+1]))
	}

	return points
}

func NewTimeSeries(name string, points TimeSeriesPoints) *TimeSeries {
	return &TimeSeries{
		Name:   name,
		Points: points,
	}
}