package plans

import (
	"engine/xsql"
	"fmt"
	"reflect"
	"strings"
	"testing"
)

func TestHavingPlan_Apply(t *testing.T) {
	var tests = []struct {
		sql  string
		data interface{}
		result interface{}
	}{
		{
			sql: `SELECT id1 FROM src1 HAVING avg(id1) > 1`,
			data: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 2, "f1" : "v2"},
						},{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 5, "f1" : "v1"},
						},

					},
				},
			},
			result: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 2, "f1" : "v2"},
						},{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 5, "f1" : "v1"},
						},
					},
				},
			},
		},

		{
			sql: `SELECT id1 FROM src1 HAVING sum(id1) > 1`,
			data: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},
					},
				},
			},
			result: nil,
		},

		{
			sql: `SELECT id1 FROM src1 HAVING sum(id1) = 1`,
			data: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},
					},
				},
			},
			result: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},
					},
				},
			},
		},


		{
			sql: `SELECT id1 FROM src1 HAVING max(id1) > 10`,
			data: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},
					},
				},
			},
			result: nil,
		},

		{
			sql: `SELECT id1 FROM src1 HAVING max(id1) = 1`,
			data: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},
					},
				},
			},
			result: xsql.WindowTuplesSet{
				xsql.WindowTuples{
					Emitter:"src1",
					Tuples:[]xsql.Tuple{
						{
							Emitter: "src1",
							Message: xsql.Message{"id1" : 1, "f1" : "v1"},
						},
					},
				},
			},
		},
	}

	fmt.Printf("The test bucket size is %d.\n\n", len(tests))
	for i, tt := range tests {
		stmt, err := xsql.NewParser(strings.NewReader(tt.sql)).Parse()
		if err != nil {
			t.Errorf("statement parse error %s", err)
			break
		}

		pp := &HavingPlan{Condition:stmt.Having}
		result := pp.Apply(nil, tt.data)
		if !reflect.DeepEqual(tt.result, result) {
			t.Errorf("%d. %q\n\nresult mismatch:\n\nexp=%#v\n\ngot=%#v\n\n", i, tt.sql, tt.result, result)
		}
	}
}