package controllers

import "testing"

func TestIsHyperlocal(t *testing.T) {
	cases := []struct {
		name     string
		pickup   string
		delivery string
		want     bool
	}{
		{
			name:     "same coimbatore postal area routes hyperlocal",
			pickup:   "641012", // Gandhipuram
			delivery: "641004", // Peelamedu
			want:     true,
		},
		{
			name:     "identical pincode routes hyperlocal",
			pickup:   "641012",
			delivery: "641012",
			want:     true,
		},
		{
			name:     "coimbatore to chennai is not hyperlocal",
			pickup:   "641012",
			delivery: "600001",
			want:     false,
		},
		{
			name:     "adjacent prefixes are not hyperlocal",
			pickup:   "641012",
			delivery: "642012",
			want:     false,
		},
		{
			// Bad data must fall back to the hub route rather than sending a
			// cross-city parcel out for local delivery.
			name:     "short pickup pincode is not hyperlocal",
			pickup:   "64",
			delivery: "641012",
			want:     false,
		},
		{
			name:     "short delivery pincode is not hyperlocal",
			pickup:   "641012",
			delivery: "64",
			want:     false,
		},
		{
			name:     "empty pincodes are not hyperlocal",
			pickup:   "",
			delivery: "",
			want:     false,
		},
		{
			name:     "exactly three digits is enough to match",
			pickup:   "641",
			delivery: "641999",
			want:     true,
		},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			if got := isHyperlocal(tc.pickup, tc.delivery); got != tc.want {
				t.Errorf("isHyperlocal(%q, %q) = %v, want %v", tc.pickup, tc.delivery, got, tc.want)
			}
		})
	}
}

func TestCalculateVolumetricWeight(t *testing.T) {
	cases := []struct {
		name    string
		l, w, h float64
		want    float64
	}{
		{name: "zero dimensions weigh nothing", l: 0, w: 0, h: 0, want: 0},
		{name: "standard divisor of 5000", l: 50, w: 40, h: 30, want: 12},
		{name: "one centimetre cube", l: 1, w: 1, h: 1, want: 1.0 / 5000.0},
		{name: "large parcel", l: 100, w: 100, h: 100, want: 200},
	}

	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := calculateVolumetricWeight(tc.l, tc.w, tc.h)
			if got != tc.want {
				t.Errorf("calculateVolumetricWeight(%v, %v, %v) = %v, want %v",
					tc.l, tc.w, tc.h, got, tc.want)
			}
		})
	}
}