const hasPropCond = (onboardingDataPropName) => ({
  type: 'hasProp',
  onboardingDataPropName
});

const notHasPropCond = (
  onboardingDataPropName,
  validator
) => ({
  type: 'notHasProp',
  onboardingDataPropName,
  validator
});

const nextStageEvents = (
  prop,
  target
) => ({
  '': {
    cond: hasPropCond(prop),
    target
  },
  COMPLETE: {
    actions: assign({ [prop]: (ctx, e) => true })
  }
});

const takePhotoStages = (propName, targetState) => ({
  OnboardingVerificationInstructions: {
    on: {
      TAKE_PHOTO: {
        target: 'OnboardingVerificationPhoto'
      }
    }
  },
  OnboardingVerificationPhoto: {
    on: {
      COMPLETE: {
        target: 'OnboardingVerficationPhotoPreview'
      }
    }
  },
  OnboardingVerficationPhotoPreview: {
    on: {
      COMPLETE: {
        target: targetState,
        actions: assign({ [propName]: true })
      },
      RETAKE: {
        target: 'OnboardingVerificationPhoto'
      }
    }
  }
});

const states = {
  Start: {
    initial: 'Splash',
    states: {
      Splash: {
        on: {
          COMPLETE: [
            {
              cond: notHasPropCond('__disabled'),
              target: '#onboarding.OnboardingApplying'
            },
            {
              cond: hasPropCond('__disabled'),
              target: 'OnboardingUnavailable'
            }
          ]
        }
      },
      OnboardingUnavailable: {
        on: {}
      }
    }
  },
  OnboardingApplying: {
    on: {
      ...nextStageEvents('__applying', 'OnboardingPrivacy')
    }
  },
  OnboardingPrivacy: {
    on: {
      ...nextStageEvents('__privacy', 'OnboardingAccountFees')
    }
  },
  OnboardingAccountFees: {
    id: 'OnboardingAccountFees',
    on: {
      ...nextStageEvents('__accountFees', 'Terms')
    }
  },
  Terms: {
    initial: 'Picker',
    states: {
      Picker: {
        on: {
          '': [
            {
              cond: hasPropCond('__upcomingTerms'),
              target: 'OnboardingTermsAndConditions'
            },
            {
              cond: notHasPropCond('__upcomingTerms'),
              target: 'OnboardingUpcomingTermsAndConditions'
            }
          ]
        }
      },
      OnboardingTermsAndConditions: {
        on: {
          ...nextStageEvents('__terms', '#OnboardingFirstName')
        }
      },
      OnboardingUpcomingTermsAndConditions: {
        on: {
          ...nextStageEvents('__upcomingTerms', '#OnboardingAccountFees')
        }
      }
    }
  },
  OnboardingFirstName: {
    id: 'OnboardingFirstName',
    on: {
      ...nextStageEvents('firstName', 'OnboardingLastName')
    }
  },
  OnboardingLastName: {
    on: {
      ...nextStageEvents('lastName', 'OnboardingDateOfBirth')
    }
  },
  OnboardingDateOfBirth: {
    on: {
      ...nextStageEvents('dateOfBirth', 'PhoneNumber')
    }
  },
  PhoneNumber: {
    initial: 'Picker',
    states: {
      Picker: {
        on: {
          '': [
            {
              cond: notHasPropCond('mobileNumber'),
              target: 'OnboardingPhoneNumber'
            },
            {
              cond: notHasPropCond('__confirmMobileNumber'),
              target: 'OnboardingPhoneNumberConfirm'
            },
            {
              cond: hasPropCond('__confirmMobileNumber'),
              target: '#onboarding.OnboardingEmail'
            }
          ]
        }
      },
      OnboardingPhoneNumber: {
        on: {
          ...nextStageEvents('mobileNumber', 'Picker')
        }
      },
      OnboardingPhoneNumberConfirm: {
        on: {
          ...nextStageEvents('__confirmMobileNumber', 'Picker'),
          ALREADY_REGISTERED: {
            target: 'OnboardingDuplicateFeatureLogin'
          },
          RESEND_CODE: {
            target: 'OnboardingResendCode'
          }
        }
      },
      OnboardingResendCode: {
        on: {}
      },
      OnboardingDuplicateFeatureLogin: {
        on: {
          LOGIN: {
            target: 'OnboardingAccessingBoAccount'
          }
        }
      },
      OnboardingAccessingBoAccount: {
        on: {
          RECOVER: {
            target: 'RecoverEmail'
          }
        }
      },
      // Just a dead end for now
      RecoverEmail: {
        on: {}
      }
    }
  },
  OnboardingEmail: {
    on: {
      ...nextStageEvents('email', 'Address')
    }
  },
  Address: {
    initial: 'Picker',
    states: {
      Picker: {
        on: {
          '': [
            {
              cond: notHasPropCond('addressPostcode'),
              target: 'Postcode'
            },
            {
              cond: notHasPropCond('__addressComplete'),
              target: 'OnboardingAddress'
            },
            {
              cond: hasPropCond('__addressComplete'),
              target: 'OnboardingConfirmAddress'
            }
          ]
        }
      },
      Postcode: {
        initial: 'Picker',
        states: {
          Picker: {
            on: {
              '': [
                {
                  cond: notHasPropCond('addressPostcode'),
                  target: 'OnboardingPostcode'
                },
                {
                  cond: notHasPropCond('__addressComplete'),
                  target: 'OnboardingPostcodeResults'
                }
              ]
            }
          },
          OnboardingPostcode: {
            on: {
              ...nextStageEvents('addressPostcode', 'Picker')
            }
          },
          OnboardingPostcodeResults: {
            on: {
              ...nextStageEvents('__addressComplete', '#onboarding.Address'),
              MANUAL_ENTRY: {
                target: '#onboarding.Address.OnboardingAddress'
              }
            }
          }
        }
      },
      OnboardingAddress: {
        on: {
          ...nextStageEvents('__addressComplete', 'Picker')
        }
      },
      OnboardingConfirmAddress: {
        on: {
          ...nextStageEvents(
            '__confirmAddress',
            '#onboarding.OnboardingNationality'
          ),
          EDIT_ADDRESS: {
            target: 'Picker',
            actions: assign({ __addressComplete: (_ctx, _e) => false })
          }
        }
      }
    }
  },
  OnboardingNationality: {
    on: {
      ...nextStageEvents('nationalities', 'OnboardingTax', val => {
        if (Array.isArray(val)) {
          return val.length > 0;
        }
        return false;
      }),
      INVALID_NATIONALITY: {
        target: 'OnboardingDenied'
      }
    }
  },
  OnboardingTax: {
    on: {
      ...nextStageEvents('taxResidencies', 'PassCode'),
      INVALID_TAX: {
        target: 'OnboardingDenied'
      }
    }
  },
  OnboardingDenied: {
    on: {}
  },
  PassCode: {
    initial: 'Picker',
    states: {
      Picker: {
        on: {
          '': [
            {
              cond: notHasPropCond('__passCode'),
              target: 'OnboardingPassCode'
            },
            {
              cond: notHasPropCond('__passCodeConfirm'),
              target: 'OnboardingPassCodeConfirm'
            },
            {
              cond: hasPropCond('__passCodeConfirm'),
              target: '#onboarding.OnboardingNotifications'
            }
          ]
        }
      },
      OnboardingPassCode: {
        on: {
          ...nextStageEvents('__passCode', 'Picker')
        }
      },
      OnboardingPassCodeConfirm: {
        on: {
          ...nextStageEvents('__passCodeConfirm', 'Picker')
        }
      }
    }
  },
  OnboardingNotifications: {
    on: {
      COMPLETE: {
        target: 'OnboardingFSCS'
      }
    }
  },
  OnboardingFSCS: {
    on: {
      COMPLETE: {
        target: 'HooyuApi'
      }
    }
  },
  HooyuApi: {
    initial: 'OnboardingVerificationHome',
    states: {
      OnboardingVerificationHome: {
        on: {
          ENTER_ID: {
            target: 'ID',
            cond: notHasPropCond('__idPhoto')
          },
          ENTER_ADDRESS: {
            target: 'ADDRESS',
            cond: notHasPropCond('__addressPhoto')
          },
          ENTER_SELFIE: {
            target: 'SELFIE',
            cond: notHasPropCond('__selfiePhoto')
          },
          '': [
            {
              target: 'OnboardingVerificationWaiting',
              cond: context =>
                context.__idPhoto &&
                context.__addressPhoto &&
                context.__selfiePhoto &&
                !context.__hooyuVerificationComplete
            },
            {
              target: '#onboarding.OnboardingSuccess',
              cond: context =>
                context.__idPhoto &&
                context.__addressPhoto &&
                context.__selfiePhoto &&
                context.__hooyuVerificationComplete
            }
          ]
        }
      },
      ID: {
        initial: 'OnboardingVerificationOfficialID',
        states: {
          OnboardingVerificationOfficialID: {
            on: {
              TAKE_PHOTO: {
                target: 'OnboardingVerificationInstructions'
              },
              COMPLETE: {
                target: 'OnboardingVerificationOfficialIDCountry'
              }
            }
          },
          OnboardingVerificationOfficialIDCountry: {
            on: {
              TAKE_PHOTO: {
                target: 'OnboardingVerificationInstructions'
              }
            }
          },
          ...takePhotoStages(
            '__idPhoto',
            '#onboarding.HooyuApi.OnboardingVerificationHome'
          )
        }
      },
      ADDRESS: {
        initial: 'OnboardingVerificationProofAddress',
        states: {
          OnboardingVerificationProofAddress: {
            on: {
              COMPLETE: {
                target: 'OnboardingVerificationProofAddressSelection'
              }
            }
          },
          OnboardingVerificationProofAddressSelection: {
            on: {
              COMPLETE: {
                target: 'OnboardingVerficationProofOfAddressChecklist'
              }
            }
          },
          OnboardingVerficationProofOfAddressChecklist: {
            on: {
              TAKE_PHOTO: {
                target: 'OnboardingVerificationInstructions'
              }
            }
          },
          ...takePhotoStages(
            '__addressPhoto',
            '#onboarding.HooyuApi.OnboardingVerificationHome'
          )
        }
      },
      SELFIE: {
        initial: 'OnboardingVerificationSelfie',
        states: {
          OnboardingVerificationSelfie: {
            on: {
              TAKE_PHOTO: {
                target: 'OnboardingVerificationInstructions'
              }
            }
          },
          ...takePhotoStages(
            '__selfiePhoto',
            '#onboarding.HooyuApi.OnboardingVerificationHome'
          )
        }
      },
      // this polls for success
      OnboardingVerificationWaiting: {
        on: {
          FAIL: {
            target: 'OnboardingVerificationHome'
          },
          N_1: {
            target: '#onboarding.Start',
            actions: assign((_ctx, _e) => ({ ...emptyContext }))
          },
          COMPLETE: {
            target: '#onboarding.HooyuApi.OnboardingVerificationHome',
            actions: assign({
              __hooyuVerificationComplete: (_ctx, _e) => true
            })
          }
        }
      }
    }
  },
  OnboardingSuccess: {
    on: {
      COMPLETE: {
        target: 'PostOnboardingMarketingOptIn'
      }
    }
  },
  PostOnboardingMarketingOptIn: {
    on: {
      COMPLETE: {
        target: 'PostOnboardingEmail'
      }
    }
  },
  PostOnboardingEmailVerified: {
    on: {
      N_0: {
        target: 'App'
      },
      N_1: {
        target: 'PostOnboardingSupport'
      }
    }
  },
  PostOnboardingSupport: {
    on: {
      N_0: {
        target: 'PostOnboardingWelcome'
      }
    }
  },
  PostOnboardingTour: {
    on: {
      N_0: {
        target: 'PostOnboardingWelcome'
      }
    }
  },
  PostOnboardingLivingStatus: {
    on: {
      N_0: {
        target: 'PostOnboardingEmployment'
      }
    }
  },
  PostOnboardingEmployment: {
    on: {
      N_0: {
        target: 'PostOnboardingOccupation'
      },
      N_1: {
        target: 'PostOnboardingIncome'
      }
    }
  },
  PostOnboardingOccupation: {
    on: {
      N_0: {
        target: 'PostOnboardingIncome'
      }
    }
  },
  PostOnboardingIncome: {
    on: {
      N_0: {
        target: 'PostOnboardingSums'
      }
    }
  },
  PostOnboardingSums: {
    on: {
      N_0: {
        target: 'PostOnboardingCalculator'
      }
    }
  },
  PostOnboardingCalculator: {
    on: {
      N_0: {
        target: 'PostOnboardingAddMoney'
      }
    }
  },
  PostOnboardingAddMoney: {
    on: {
      N_0: {
        target: 'App'
      }
    }
  },
  PostOnboardingEmail: {
    on: {
      N_0: {
        target: 'PostOnboardingEmailEdit'
      },
      N_1: {
        target: 'PostOnboardingEmailSent'
      }
    }
  },
  PostOnboardingEmailSent: {
    on: {
      N_0: {
        target: 'PostOnboardingEmailIncorrect'
      },
      N_1: {
        target: 'ExternalOpenEmail'
      }
    }
  },
  ExternalOpenEmail: {
    on: {
      N_0: {
        target: 'PostOnboardingEmailVerified'
      }
    }
  },
  PostOnboardingWelcome: {
    on: {
      N_0: {
        target: 'PostOnboardingLivingStatus'
      },
      N_1: {
        target: 'PostOnboardingTour'
      }
    }
  },
  PostOnboardingEmailIncorrect: {
    on: {
      N_0: {
        target: 'PostOnboardingEmailEdit'
      },
      N_1: {
        target: 'PostOnboardingSupport'
      },
      N_2: {
        target: 'PostOnboardingEmailSent'
      }
    }
  },
  PostOnboardingEmailVerifiedRoute: {
    on: {
      N_0: {
        target: 'App'
      },
      N_1: {
        target: 'PostOnboardingSupport'
      }
    }
  },
  PostOnboardingEmailEdit: {
    on: {
      N_0: {
        target: 'PostOnboardingEmailSent'
      }
    }
  },
  App: {
    on: {}
  }
};

const onboardingMachine = Machine(
  {
    id: 'onboarding',
    initial: 'Start',
    context: {
      firstName: true,
      lastName: true,
      dateOfBirth: true,
      mobileCountryCode: true,
      mobileNumber: true,
      email: true,
      addressLine1: undefined,
      addressLine2: undefined,
      addressLine3: undefined,
      addressTown: undefined,
      addressCounty: undefined,
      addressCountry: undefined,
      addressPostcode: true,
      equifaxAddressId: undefined,
      nationalities: ['one'],
      taxResidencies: ['one'],
      hooyuUrl: undefined,
      documents: [],
      mobileNumberConfirmed: false,
      upcomingTermsAndConditionsAcknowledged: null,
      error: null,
      verification: null,
      // different
      applying: false,
      confirmAddress: false,
      terms: false,
      privacy: false,
      accountFees: false,
      addressPostcodeResults: false,
      __applying: true,
      __privacy: true,
      __accountFees: true,
      __upcomingTerms: true,
      __terms: true,
      __addressComplete: true,
      __passCode: true,
      __passCodeConfirm: true,
      __confirmMobileNumber: true,
      __confirmAddress: true,
    },
    states
  },
  {
    guards: {
      hasProp: (context, _event, guard) => {
        const cond = guard.cond;
        const val = context[cond.onboardingDataPropName];
        if (Array.isArray(val)) {
          return val.length > 0;
        }
        return !!context[cond.onboardingDataPropName];
      },

      notHasProp: (context, _event, guard) => {
        const cond = guard.cond;
        const val = context[cond.onboardingDataPropName];
        if (Array.isArray(val)) {
          return val.length === 0;
        }
        return !context[cond.onboardingDataPropName];
      }
    }
  }
);