// Copyright 2019 PingCAP, Inc.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package distsql

import (
	"context"

	. "github.com/pingcap/check"
	"github.com/pingcap/tidb/sessionctx/stmtctx"
	"github.com/pingcap/tidb/store/tikv"
	"github.com/pingcap/tidb/util/execdetails"
	"github.com/pingcap/tidb/util/mock"
	"github.com/pingcap/tipb/go-tipb"
)

func (s *testSuite) TestUpdateCopRuntimeStats(c *C) {
	ctx := mock.NewContext()
	ctx.GetSessionVars().StmtCtx = new(stmtctx.StatementContext)
	sr := selectResult{ctx: ctx}
	c.Assert(ctx.GetSessionVars().StmtCtx.RuntimeStatsColl, IsNil)
	sr.rootPlanID = 1234
	sr.updateCopRuntimeStats(context.Background(), &tikv.CopRuntimeStats{ExecDetails: execdetails.ExecDetails{CalleeAddress: "a"}}, 0)

	ctx.GetSessionVars().StmtCtx.RuntimeStatsColl = execdetails.NewRuntimeStatsColl()
	t := uint64(1)
	sr.selectResp = &tipb.SelectResponse{
		ExecutionSummaries: []*tipb.ExecutorExecutionSummary{
			{TimeProcessedNs: &t, NumProducedRows: &t, NumIterations: &t},
		},
	}
	c.Assert(len(sr.selectResp.GetExecutionSummaries()) != len(sr.copPlanIDs), IsTrue)
	sr.updateCopRuntimeStats(context.Background(), &tikv.CopRuntimeStats{ExecDetails: execdetails.ExecDetails{CalleeAddress: "callee"}}, 0)
	c.Assert(ctx.GetSessionVars().StmtCtx.RuntimeStatsColl.ExistsCopStats(1234), IsFalse)

	sr.copPlanIDs = []int{sr.rootPlanID}
	c.Assert(ctx.GetSessionVars().StmtCtx.RuntimeStatsColl, NotNil)
	c.Assert(len(sr.selectResp.GetExecutionSummaries()), Equals, len(sr.copPlanIDs))
	sr.updateCopRuntimeStats(context.Background(), &tikv.CopRuntimeStats{ExecDetails: execdetails.ExecDetails{CalleeAddress: "callee"}}, 0)
	c.Assert(ctx.GetSessionVars().StmtCtx.RuntimeStatsColl.GetCopStats(1234).String(), Equals, "tikv_task:{time:1ns, loops:1}")
}