package fs

import (
	"encoding/json"
	"strconv"
	"testing"

	"github.com/stretchr/testify/assert"
)

// Check it satisfies the interfaces
var (
	_ Flagger   = (*DumpFlags)(nil)
	_ FlaggerNP = DumpFlags(0)
)

func TestDumpFlagsString(t *testing.T) {
	assert.Equal(t, "", DumpFlags(0).String())
	assert.Equal(t, "headers", (DumpHeaders).String())
	assert.Equal(t, "headers,bodies", (DumpHeaders | DumpBodies).String())
	assert.Equal(t, "headers,bodies,requests,responses,auth,filters", (DumpHeaders | DumpBodies | DumpRequests | DumpResponses | DumpAuth | DumpFilters).String())
	assert.Equal(t, "headers,Unknown-0x8000", (DumpHeaders | DumpFlags(0x8000)).String())
}

func TestDumpFlagsSet(t *testing.T) {
	for _, test := range []struct {
		in      string
		want    DumpFlags
		wantErr string
	}{
		{"", DumpFlags(0), ""},
		{"bodies", DumpBodies, ""},
		{"bodies,headers,auth", DumpBodies | DumpHeaders | DumpAuth, ""},
		{"bodies,headers,auth", DumpBodies | DumpHeaders | DumpAuth, ""},
		{"headers,bodies,requests,responses,auth,filters", DumpHeaders | DumpBodies | DumpRequests | DumpResponses | DumpAuth | DumpFilters, ""},
		{"headers,bodies,unknown,auth", 0, "invalid choice \"unknown\""},
	} {
		f := DumpFlags(0xffffffffffffffff)
		initial := f
		err := f.Set(test.in)
		if err != nil {
			if test.wantErr == "" {
				t.Errorf("Got an error when not expecting one on %q: %v", test.in, err)
			} else {
				assert.Contains(t, err.Error(), test.wantErr)
			}
			assert.Equal(t, initial, f, test.want)
		} else {
			if test.wantErr != "" {
				t.Errorf("Got no error when expecting one on %q", test.in)
			} else {
				assert.Equal(t, test.want, f)
			}
		}

	}
}

func TestDumpFlagsType(t *testing.T) {
	f := DumpFlags(0)
	assert.Equal(t, "DumpFlags", f.Type())
}

func TestDumpFlagsUnmarshallJSON(t *testing.T) {
	for _, test := range []struct {
		in      string
		want    DumpFlags
		wantErr string
	}{
		{`""`, DumpFlags(0), ""},
		{`"bodies"`, DumpBodies, ""},
		{`"bodies,headers,auth"`, DumpBodies | DumpHeaders | DumpAuth, ""},
		{`"bodies,headers,auth"`, DumpBodies | DumpHeaders | DumpAuth, ""},
		{`"headers,bodies,requests,responses,auth,filters"`, DumpHeaders | DumpBodies | DumpRequests | DumpResponses | DumpAuth | DumpFilters, ""},
		{`"headers,bodies,unknown,auth"`, 0, "invalid choice \"unknown\""},
		{`0`, DumpFlags(0), ""},
		{strconv.Itoa(int(DumpBodies)), DumpBodies, ""},
		{strconv.Itoa(int(DumpBodies | DumpHeaders | DumpAuth)), DumpBodies | DumpHeaders | DumpAuth, ""},
	} {
		f := DumpFlags(0xffffffffffffffff)
		initial := f
		err := json.Unmarshal([]byte(test.in), &f)
		if err != nil {
			if test.wantErr == "" {
				t.Errorf("Got an error when not expecting one on %q: %v", test.in, err)
			} else {
				assert.Contains(t, err.Error(), test.wantErr)
			}
			assert.Equal(t, initial, f, test.want)
		} else {
			if test.wantErr != "" {
				t.Errorf("Got no error when expecting one on %q", test.in)
			} else {
				assert.Equal(t, test.want, f)
			}
		}
	}
}