package main

import (
	"os"
	"os/user"
	"testing"
)

func TestConfig(t *testing.T) {
	var filename string = "/invalid"

	testValues := map[string]string{
		"turns":  "5",
		"planet": "Earth",
		"size":   "Medium",
		"PI":     "Raspberry",
	}

	u, err := user.Current()
	if err != nil {
		t.Fatalf("user.Current: %v", err)
	}

	if u.Name == "root" {
		t.Skip("Don't run tests as root.")
	}

	err = SaveConfig(filename, testValues)

	if err == nil {
		t.Errorf("SaveConfig: Expected error writing to %s\n", filename)
	}

	fail, err := LoadConfig(filename)

	if fail == nil {
		t.Errorf("LoadConfig: Expected error reading %s\n", filename)
	}

	filename = ".test.config"
	os.Remove(filename)

	if FileExists(filename) {
		t.Errorf("FileExists says %s exists.\n", filename)
	}

	err = SaveConfig(filename, testValues)
	if err != nil {
		t.Errorf("SaveConfig: %s\n", err)
	}

	file, err := os.OpenFile(filename, os.O_APPEND|os.O_RDWR, 0666)
	if err != nil {
		t.Errorf("OpenFile %s : %s\n", filename, err)
	}

	file.WriteString("\n")
	file.WriteString("# Comment goes here\n")
	file.Close()

	if !FileExists(filename) {
		t.Errorf("FileExists say %s missing.\n", filename)
	}

	got, err := LoadConfig(filename)
	if err != nil {
		t.Errorf("LoadConfig: Got error reading %s : %s\n", filename, err)
	}

	for k, v := range got {
		testValue, ok := testValues[k]
		if !ok {
			t.Errorf("LoadConfig key %s wasn't in original\n", k)
		} else {
			if testValue != v {
				t.Errorf("LoadConfig key %s expected %s, got %s\n", k, v, testValue)
			}
		}
	}

	os.Remove(filename)
	var b bool

	b = SetConfigDefault(&got, "turns", "10")
	if !b {
		t.Errorf("Setting existing key default failed.\n")
	}

	b = SetConfigDefault(&got, "missing", "yes")
	if b {
		t.Errorf("Setting missing default returned true.\n")
	}
}