package command_test

import (
	"testing"

	"github.com/google/go-cmp/cmp"
	"go-mod.ewintr.nl/planner/plan/command"
)

func TestArgSet(t *testing.T) {
	t.Parallel()

	as := command.ArgSet{
		Main: "main",
		Flags: map[string]string{
			"name 1": "value 1",
			"name 2": "value 2",
			"name 3": "value 3",
		},
	}

	t.Run("hasflag", func(t *testing.T) {
		t.Run("true", func(t *testing.T) {
			if has := as.HasFlag("name 1"); !has {
				t.Errorf("exp true, got %v", has)
			}
		})
		t.Run("false", func(t *testing.T) {
			if has := as.HasFlag("unknown"); has {
				t.Errorf("exp false, got %v", has)
			}
		})
	})

	t.Run("flag", func(t *testing.T) {
		t.Run("known", func(t *testing.T) {
			if val := as.Flag("name 1"); val != "value 1" {
				t.Errorf("exp value 1, got %v", val)
			}
		})
		t.Run("unknown", func(t *testing.T) {
			if val := as.Flag("unknown"); val != "" {
				t.Errorf(`exp "", got %v`, val)
			}
		})
	})

	t.Run("setflag", func(t *testing.T) {
		exp := "new value"
		as.SetFlag("new name", exp)
		if act := as.Flag("new name"); exp != act {
			t.Errorf("exp %v, got %v", exp, act)
		}
	})
}

func TestParseArgs(t *testing.T) {
	t.Parallel()

	for _, tc := range []struct {
		name   string
		args   []string
		expAS  *command.ArgSet
		expErr bool
	}{
		{
			name: "empty",
			expAS: &command.ArgSet{
				Flags: map[string]string{},
			},
		},
		{
			name: "just main",
			args: []string{"one", "two three", "four"},
			expAS: &command.ArgSet{
				Main:  "one two three four",
				Flags: map[string]string{},
			},
		},
		{
			name: "with flags",
			args: []string{"-flag1", "value1", "one", "two", "-flag2", "value2", "-flag3", "value3"},
			expAS: &command.ArgSet{
				Main: "one two",
				Flags: map[string]string{
					"flag1": "value1",
					"flag2": "value2",
					"flag3": "value3",
				},
			},
		},
		{
			name:   "flag without value",
			args:   []string{"one", "two", "-flag1"},
			expErr: true,
		},
		{
			name:   "split main",
			args:   []string{"one", "-flag1", "value1", "two"},
			expErr: true,
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			actAS, actErr := command.ParseArgs(tc.args)
			if tc.expErr != (actErr != nil) {
				t.Errorf("exp %v, got %v", tc.expErr, actErr)
			}
			if tc.expErr {
				return
			}
			if diff := cmp.Diff(tc.expAS, actAS); diff != "" {
				t.Errorf("(exp +, got -)\n%s", diff)
			}
		})
	}
}