package golang

import (
	"testing"

	"github.com/sqlc-dev/sqlc/internal/metadata"
	"github.com/sqlc-dev/sqlc/internal/plugin"
)

func TestPutOutColumns_ForZeroColumns(t *testing.T) {
	tests := []struct {
		cmd  string
		want bool
	}{
		{
			cmd:  metadata.CmdExec,
			want: false,
		},
		{
			cmd:  metadata.CmdExecResult,
			want: false,
		},
		{
			cmd:  metadata.CmdExecRows,
			want: false,
		},
		{
			cmd:  metadata.CmdExecLastId,
			want: false,
		},
		{
			cmd:  metadata.CmdMany,
			want: true,
		},
		{
			cmd:  metadata.CmdOne,
			want: true,
		},
		{
			cmd:  metadata.CmdCopyFrom,
			want: false,
		},
		{
			cmd:  metadata.CmdBatchExec,
			want: false,
		},
		{
			cmd:  metadata.CmdBatchMany,
			want: true,
		},
		{
			cmd:  metadata.CmdBatchOne,
			want: true,
		},
	}
	for _, tc := range tests {
		t.Run(tc.cmd, func(t *testing.T) {
			query := &plugin.Query{
				Cmd:     tc.cmd,
				Columns: []*plugin.Column{},
			}
			got := putOutColumns(query)
			if got != tc.want {
				t.Errorf("putOutColumns failed. want %v, got %v", tc.want, got)
			}
		})
	}
}

func TestPutOutColumns_AlwaysTrueWhenQueryHasColumns(t *testing.T) {
	query := &plugin.Query{
		Cmd:     metadata.CmdMany,
		Columns: []*plugin.Column{{}},
	}
	if putOutColumns(query) != true {
		t.Error("should be true when we have columns")
	}
}