package commands

import (
	"context"
	"encoding/json"
	"testing"

	"github.com/ledgerwatch/erigon/cmd/rpcdaemon/cli"
	"github.com/ledgerwatch/erigon/common"
	"github.com/ledgerwatch/erigon/rpc"
)

func TestEmptyQuery(t *testing.T) {
	db, err := createTestKV()
	if err != nil {
		t.Fatalf("create test db: %v", err)
	}
	defer db.Close()
	api := NewTraceAPI(NewBaseApi(nil), db, &cli.Flags{})
	// Call GetTransactionReceipt for transaction which is not in the database
	var latest = rpc.LatestBlockNumber
	results, err := api.CallMany(context.Background(), json.RawMessage("[]"), &rpc.BlockNumberOrHash{BlockNumber: &latest})
	if err != nil {
		t.Errorf("calling CallMany: %v", err)
	}
	if results == nil {
		t.Errorf("expected empty array, got nil")
	}
	if len(results) > 0 {
		t.Errorf("expected empty array, got %d elements", len(results))
	}
}
func TestCoinbaseBalance(t *testing.T) {
	db, err := createTestKV()
	if err != nil {
		t.Fatalf("create test db: %v", err)
	}
	defer db.Close()
	api := NewTraceAPI(NewBaseApi(nil), db, &cli.Flags{})
	// Call GetTransactionReceipt for transaction which is not in the database
	var latest = rpc.LatestBlockNumber
	results, err := api.CallMany(context.Background(), json.RawMessage(`
[
	[{"from":"0x71562b71999873db5b286df957af199ec94617f7","to":"0x0d3ab14bbad3d99f4203bd7a11acb94882050e7e","gas":"0x15f90","gasPrice":"0x4a817c800","value":"0x1"},["trace", "stateDiff"]],
	[{"from":"0x71562b71999873db5b286df957af199ec94617f7","to":"0x0d3ab14bbad3d99f4203bd7a11acb94882050e7e","gas":"0x15f90","gasPrice":"0x4a817c800","value":"0x1"},["trace", "stateDiff"]]
]
`), &rpc.BlockNumberOrHash{BlockNumber: &latest})
	if err != nil {
		t.Errorf("calling CallMany: %v", err)
	}
	if results == nil {
		t.Errorf("expected empty array, got nil")
	}
	if len(results) != 2 {
		t.Errorf("expected array with 2 elements, got %d elements", len(results))
	}
	// Expect balance increase of the coinbase (zero address)
	if _, ok := results[1].StateDiff[common.Address{}]; !ok {
		t.Errorf("expected balance increase for coinbase (zero address)")
	}

}