package simql

import (
	"testing"

	"github.com/alecthomas/assert/v2"
)

func TestColumn(t *testing.T) {
	type TestCase struct {
		In      string
		IsValid bool
		Column  string
		As      string
	}

	testCases := []TestCase{
		// Column only
		{In: "*", IsValid: true, Column: "*"},
		{In: "email", IsValid: true, Column: "email"},
		{In: "customer.*", IsValid: true, Column: "customer.*"},
		{In: "customer.email", IsValid: true, Column: "customer.email"},
		// Column and alias
		{In: "customer.email as email", IsValid: true, Column: "customer.email", As: "email"},
		// Invalid format (spaces)
		{In: "customer.email as  email"},
		{In: " customer.email as email"},
		{In: "also as  broken "},
		// Invalid format (disallowed characters) - TODO
	}

	for _, testCase := range testCases {
		t.Run(testCase.In, func(t *testing.T) {
			c := Column(testCase.In)
			column, as, ok := c.Parse()

			assert.Equal(t, testCase.IsValid, ok, "incorrect test case")
			assert.Equal(t, testCase.Column, column, "parsed column incorrectly")
			assert.Equal(t, testCase.As, as, "parsed as incorrectly")
		})
	}
}