package authority

import (
	"crypto/x509"
	"errors"
	"net/http"
	"reflect"
	"testing"

	"go.step.sm/crypto/pemutil"

	"github.com/smallstep/assert"
	"github.com/smallstep/certificates/api/render"
)

func TestRoot(t *testing.T) {
	a := testAuthority(t)
	a.certificates.Store("invaliddata", "a string") // invalid cert for testing

	tests := map[string]struct {
		sum  string
		err  error
		code int
	}{
		"not-found":                  {"foo", errors.New("certificate with fingerprint foo was not found"), http.StatusNotFound},
		"invalid-stored-certificate": {"invaliddata", errors.New("stored value is not a *x509.Certificate"), http.StatusInternalServerError},
		"success":                    {"189f573cfa159251e445530847ef80b1b62a3a380ee670dcb49e33ed34da0616", nil, http.StatusOK},
	}

	for name, tc := range tests {
		t.Run(name, func(t *testing.T) {
			crt, err := a.Root(tc.sum)
			if err != nil {
				if assert.NotNil(t, tc.err) {
					var sc render.StatusCodedError
					assert.Fatal(t, errors.As(err, &sc), "error does not implement StatusCodedError interface")
					assert.Equals(t, sc.StatusCode(), tc.code)
					assert.HasPrefix(t, err.Error(), tc.err.Error())
				}
			} else {
				if assert.Nil(t, tc.err) {
					assert.Equals(t, crt, a.rootX509Certs[0])
				}
			}
		})
	}
}

func TestAuthority_GetRootCertificate(t *testing.T) {
	cert, err := pemutil.ReadCertificate("testdata/certs/root_ca.crt")
	if err != nil {
		t.Fatal(err)
	}

	tests := []struct {
		name string
		want *x509.Certificate
	}{
		{"ok", cert},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			a := testAuthority(t)
			if got := a.GetRootCertificate(); !reflect.DeepEqual(got, tt.want) {
				t.Errorf("Authority.GetRootCertificate() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestAuthority_GetRootCertificates(t *testing.T) {
	cert, err := pemutil.ReadCertificate("testdata/certs/root_ca.crt")
	if err != nil {
		t.Fatal(err)
	}

	tests := []struct {
		name string
		want []*x509.Certificate
	}{
		{"ok", []*x509.Certificate{cert}},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			a := testAuthority(t)
			if got := a.GetRootCertificates(); !reflect.DeepEqual(got, tt.want) {
				t.Errorf("Authority.GetRootCertificates() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestAuthority_GetRoots(t *testing.T) {
	cert, err := pemutil.ReadCertificate("testdata/certs/root_ca.crt")
	if err != nil {
		t.Fatal(err)
	}

	tests := []struct {
		name    string
		want    []*x509.Certificate
		wantErr bool
	}{
		{"ok", []*x509.Certificate{cert}, false},
	}
	for _, tt := range tests {
		a := testAuthority(t)
		t.Run(tt.name, func(t *testing.T) {
			got, err := a.GetRoots()
			if (err != nil) != tt.wantErr {
				t.Errorf("Authority.GetRoots() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(got, tt.want) {
				t.Errorf("Authority.GetRoots() = %v, want %v", got, tt.want)
			}
		})
	}
}

func TestAuthority_GetFederation(t *testing.T) {
	cert, err := pemutil.ReadCertificate("testdata/certs/root_ca.crt")
	if err != nil {
		t.Fatal(err)
	}

	tests := []struct {
		name           string
		wantFederation []*x509.Certificate
		wantErr        bool
		fn             func(a *Authority)
	}{
		{"ok", []*x509.Certificate{cert}, false, nil},
		{"fail", nil, true, func(a *Authority) {
			a.certificates.Store("foo", "bar")
		}},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			a := testAuthority(t)
			if tt.fn != nil {
				tt.fn(a)
			}
			gotFederation, err := a.GetFederation()
			if (err != nil) != tt.wantErr {
				t.Errorf("Authority.GetFederation() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if !reflect.DeepEqual(gotFederation, tt.wantFederation) {
				t.Errorf("Authority.GetFederation() = %v, want %v", gotFederation, tt.wantFederation)
			}
		})
	}
}