package ledger

import (
	"testing"
	"time"
)

func TestFileDeltas(t *testing.T) {
	d := func(s string) time.Time {
		v, _ := time.Parse("2006-01-02", s)
		return v
	}
	happy := []Delta{
		{
			Date:     d("2022-12-12"),
			Account:  "AssetAccount:Cash:Fidelity76",
			Value:    -97.92,
			Currency: USD,
		},
		{
			Date:     d("2022-12-12"),
			Account:  "Withdrawal:0:SharedHome:DominionEnergy",
			Value:    97.92,
			Currency: USD,
		},
		{
			Date:     d("2022-12-12"),
			Account:  "AssetAccount:Cash:Fidelity76",
			Value:    -1.00,
			Currency: USD,
		},
		{
			Date:     d("2022-12-12"),
			Account:  "Debts:Credit:ChaseFreedomUltdVisa",
			Value:    1.00,
			Currency: USD,
		},
	}

	cases := map[string][]Delta{
		"empty": nil,
		"one":   happy[:2],
		"happy": happy[:],
	}

	for name, d := range cases {
		want := d
		t.Run(name, func(t *testing.T) {
			f, err := NewFile("./testdata/" + name + ".dat")
			if err != nil {
				t.Fatal(err)
			}

			deltas, err := f.Deltas()
			if err != nil {
				t.Fatal(err)
			}

			if len(deltas) != len(want) {
				t.Error(len(deltas))
			}
			for i := range want {
				if want[i] != deltas[i] {
					t.Errorf("[%d] \n\twant=%+v, \n\t got=%+v", i, want[i], deltas[i])
				}
			}
		})
	}
}