// +build !go1.8

package sqlmock

import "log"

func (c *sqlmock) ExpectPing() *ExpectedPing {
	log.Println("ExpectPing has no effect on Go 1.7 or below")
	return &ExpectedPing{}
}

func (c *sqlmock) exec(query string, args []namedValue) (*ExpectedExec, error) {
	var expected *ExpectedExec
	var fulfilled int
	var ok bool
	for _, next := range c.expected {
		next.Lock()
		if next.fulfilled() {
			next.Unlock()
			fulfilled++
			continue
		}

		if c.ordered {
			if expected, ok = next.(*ExpectedExec); ok {
				break
			}
			next.Unlock()
			return nil, fmt.Errorf("call to ExecQuery '%s' with args %+v, was not expected, next expectation is: %s", query, args, next)
		}
		if exec, ok := next.(*ExpectedExec); ok {
			if err := c.queryMatcher.Match(exec.expectSQL, query); err != nil {
				next.Unlock()
				continue
			}

			if err := exec.attemptArgMatch(args); err == nil {
				expected = exec
				break
			}
		}
		next.Unlock()
	}
	if expected == nil {
		msg := "call to ExecQuery '%s' with args %+v was not expected"
		if fulfilled == len(c.expected) {
			msg = "all expectations were already fulfilled, " + msg
		}
		return nil, fmt.Errorf(msg, query, args)
	}
	defer expected.Unlock()

	if err := c.queryMatcher.Match(expected.expectSQL, query); err != nil {
		return nil, fmt.Errorf("ExecQuery: %v", err)
	}

	if err := expected.argsMatches(args); err != nil {
		return nil, fmt.Errorf("ExecQuery '%s', arguments do not match: %s", query, err)
	}

	expected.triggered = true
	if expected.err != nil {
		return expected, expected.err // mocked to return error
	}

	if expected.result == nil {
		return nil, fmt.Errorf("ExecQuery '%s' with args %+v, must return a database/sql/driver.Result, but it was not set for expectation %T as %+v", query, args, expected, expected)
	}

	return expected, nil
}