package main

import (
	"os"
	"path"
	"testing"
)

func TestConfigTargets(t *testing.T) {
	touch := func(t *testing.T, p string) {
		if err := os.WriteFile(p, nil, os.ModePerm); err != nil {
			t.Fatal(err)
		}
	}

	cases := map[string]struct {
		setup func(*testing.T, string)
		given string
		want  []string
	}{
		"does not exist": {
			given: "x",
			want:  []string{"x"},
		},
		"one file": {
			setup: func(t *testing.T, d string) {
				touch(t, path.Join(d, "x"))
			},
			given: "x",
			want:  []string{"x"},
		},
		"two files": {
			setup: func(t *testing.T, d string) {
				touch(t, path.Join(d, "a"))
				touch(t, path.Join(d, "root.yaml"))
				touch(t, path.Join(d, "z"))
			},
			given: "",
			want:  []string{"root.yaml", "a", "z"},
		},
		"empty dir": {
			setup: func(t *testing.T, d string) {
				os.Mkdir(path.Join(d, "x"), os.ModePerm)
			},
			given: "x",
			want:  []string{"root.yaml"},
		},
		"dir": {
			setup: func(t *testing.T, d string) {
				os.Mkdir(path.Join(d, "x"), os.ModePerm)
				touch(t, path.Join(d, "x", "a"))
				touch(t, path.Join(d, "x", "a.todo.xyz"))
				touch(t, path.Join(d, "x", "b"))
			},
			given: "x",
			want:  []string{"a", "a.todo.xyz", "b"},
		},
	}

	for name, d := range cases {
		c := d
		t.Run(name, func(t *testing.T) {
			d := t.TempDir()
			if c.setup != nil {
				c.setup(t, d)
			}
			config := config{target: path.Join(d, c.given)}
			got := config.Targets()
			for i := range got {
				got[i] = path.Base(got[i])
			}
			for i := range c.want {
				c.want[i] = path.Base(c.want[i])
			}

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