package services

import "testing"

/*
Import used to write no price at all — "import is not pricing, the merchant sets
it". Right about who decides, wrong about what a shopper sees in between: the
product went live at ₹0, which on a phone reads as free rather than as unpriced.
A product uploaded by sheet carried its price and showed it; the same product
imported from the catalogue showed nothing.

The catalogue quotes a range as a string, so it has to be read rather than cast.
*/

func TestARangeGivesItsLowEnd(t *testing.T) {
	// Too low is a margin the shop notices and corrects; too high is a shopper
	// quietly deciding the shop is expensive.
	if got := SuggestedPriceFrom("₹9-11"); got != 9 {
		t.Errorf("₹9-11 -> %v, want 9", got)
	}
	if got := SuggestedPriceFrom("₹75-95"); got != 75 {
		t.Errorf("₹75-95 -> %v, want 75", got)
	}
}

func TestASinglePriceIsReadAsItself(t *testing.T) {
	if got := SuggestedPriceFrom("₹22"); got != 22 {
		t.Errorf("₹22 -> %v, want 22", got)
	}
}

func TestPaiseSurvive(t *testing.T) {
	if got := SuggestedPriceFrom("₹12.50 - ₹15.75"); got != 12.5 {
		t.Errorf("got %v, want 12.5", got)
	}
}

func TestOrderInsideTheRangeDoesNotMatter(t *testing.T) {
	// A range written backwards still has a low end.
	if got := SuggestedPriceFrom("₹95-75"); got != 75 {
		t.Errorf("got %v, want 75", got)
	}
}

func TestNoPriceMeansNoPrice(t *testing.T) {
	// 159 of 672 catalogue rows carry no range. Inventing a figure for those
	// would be worse than showing none — the merchant would never know to look.
	for _, input := range []string{"", "   ", "₹", "price on request", "N/A"} {
		if got := SuggestedPriceFrom(input); got != 0 {
			t.Errorf("%q -> %v, want 0", input, got)
		}
	}
}

func TestAZeroInTheRangeIsNotAPrice(t *testing.T) {
	// "₹0-50" means the low end is unknown, not that the product is free.
	if got := SuggestedPriceFrom("₹0-50"); got != 50 {
		t.Errorf("got %v, want 50", got)
	}
}