import type {
  InputBookingField_2024_06_14,
  LocationDefaultFieldOutput_2024_06_14,
  PhoneDefaultFieldOutput_2024_06_14,
  MultiSelectFieldInput_2024_06_14,
  CheckboxGroupFieldInput_2024_06_14,
  RadioGroupFieldInput_2024_06_14,
  NameDefaultFieldInput_2024_06_14,
  EmailDefaultFieldInput_2024_06_14,
  TitleDefaultFieldInput_2024_06_14,
  NotesDefaultFieldInput_2024_06_14,
  GuestsDefaultFieldInput_2024_06_14,
  RescheduleReasonDefaultFieldInput_2024_06_14,
  SplitNameDefaultFieldInput_2024_06_14,
} from "@calcom/platform-types";

import {
  systemBeforeFieldEmail,
  systemBeforeFieldName,
  systemBeforeFieldLocation,
  systemBeforeFieldPhone,
  systemAfterFieldTitle,
  systemAfterFieldNotes,
  systemAfterFieldGuests,
  systemAfterFieldRescheduleReason,
  type CustomField,
  type SystemField,
  systemBeforeFieldNameSplit,
} from "../internal-to-api";

type InputBookingField =
  | InputBookingField_2024_06_14
  | LocationDefaultFieldOutput_2024_06_14
  | PhoneDefaultFieldOutput_2024_06_14;

export function transformBookingFieldsApiToInternal(bookingFields: InputBookingField[]) {
  const customBookingFields = bookingFields.map((field) => {
    const baseProperties = getBaseProperties(field);

    const options =
      "options" in field && field.options ? transformSelectOptionsApiToInternal(field.options) : undefined;

    if (!options) {
      return baseProperties;
    }

    return {
      ...baseProperties,
      options,
    };
  });

  return customBookingFields;
}

function getBaseProperties(field: InputBookingField): CustomField | SystemField {
  if (fieldIsSelect(field)) {
    return {
      name: field.slug,
      type: field.type,
      label: field.label,
      sources: [
        {
          id: "user",
          type: "user",
          label: "User",
          fieldRequired: true,
        },
      ],
      editable: "user",
      required: field.required,
      disableOnPrefill: !!field.disableOnPrefill,
      hidden: "hidden" in field ? field.hidden : false,
    };
  }

  if (fieldIsDefaultSystemLocation(field)) {
    return {
      ...systemBeforeFieldLocation,
      required: field.required,
      hidden: field.hidden,
    };
  }

  if (fieldIsDefaultAttendeePhone(field)) {
    return {
      ...systemBeforeFieldPhone,
      required: field.required,
      hidden: field.hidden,
      label: field.label,
      placeholder: field.placeholder,
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (fieldIsCustomSystemName(field)) {
    const systemName = { ...systemBeforeFieldName };
    if (systemName.variantsConfig?.variants?.fullName?.fields?.[0]) {
      systemName.variantsConfig.variants.fullName.fields[0].label = field.label;
    }

    if (systemName.variantsConfig?.variants?.fullName?.fields?.[0]) {
      systemName.variantsConfig.variants.fullName.fields[0].placeholder = field.placeholder;
    }
    // note(Lauris): we attach top level label and placeholder for easier access when converting database event type
    // to v2 response event type even though form builder uses label and placeholder from variantsConfig.
    systemName.label = field.label;
    systemName.placeholder = field.placeholder;

    return {
      ...systemName,
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (fieldIsCustomSystemNameSplit(field)) {
    const systemNameSplit = { ...systemBeforeFieldNameSplit };

    const firstNameField = systemNameSplit.variantsConfig?.variants?.firstAndLastName?.fields?.find(
      (field) => field.name === "firstName"
    );
    const lastNameField = systemNameSplit.variantsConfig?.variants?.firstAndLastName?.fields?.find(
      (field) => field.name === "lastName"
    );

    if (firstNameField) {
      firstNameField.label = field.firstNameLabel || "";
      firstNameField.placeholder = field.firstNamePlaceholder || "";
    }

    if (lastNameField) {
      lastNameField.label = field.lastNameLabel || "";
      lastNameField.placeholder = field.lastNamePlaceholder || "";
      lastNameField.required = !!field.lastNameRequired;
    }

    return {
      ...systemNameSplit,
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (fieldIsCustomSystemEmail(field)) {
    return {
      ...systemBeforeFieldEmail,
      label: field.label,
      placeholder: field.placeholder,
      disableOnPrefill: !!field.disableOnPrefill,
      required: field.required,
    };
  }

  if (fieldIsCustomSystemRescheduleReason(field)) {
    return {
      ...systemAfterFieldRescheduleReason,
      required: !!field.required,
      hidden: !!field.hidden,
      label: field.label,
      placeholder: "placeholder" in field ? field.placeholder : "",
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (fieldIsCustomSystemTitle(field)) {
    return {
      ...systemAfterFieldTitle,
      required: !!field.required,
      hidden: !!field.hidden,
      label: field.label,
      placeholder: "placeholder" in field ? field.placeholder : "",
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (fieldIsCustomSystemNotes(field)) {
    return {
      ...systemAfterFieldNotes,
      required: !!field.required,
      hidden: !!field.hidden,
      label: field.label,
      placeholder: "placeholder" in field ? field.placeholder : "",
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (fieldIsCustomSystemGuests(field)) {
    return {
      ...systemAfterFieldGuests,
      required: !!field.required,
      hidden: !!field.hidden,
      label: field.label,
      placeholder: "placeholder" in field ? field.placeholder : "",
      disableOnPrefill: !!field.disableOnPrefill,
    };
  }

  if (field.type === "boolean") {
    return {
      name: field.slug,
      type: field.type,
      label: field.label,
      labelAsSafeHtml: `<p>${field.label}</p>\n`,
      sources: [
        {
          id: "user",
          type: "user",
          label: "User",
          fieldRequired: true,
        },
      ],
      editable: "user",
      required: !!field.required,
      disableOnPrefill: !!field.disableOnPrefill,
      hidden: !!field.hidden,
    };
  }

  return {
    name: field.slug,
    type: field.type,
    label: "label" in field ? field.label : "",
    sources: [
      {
        id: "user",
        type: "user",
        label: "User",
        fieldRequired: true,
      },
    ],
    editable: "user",
    required: !!field.required,
    placeholder: field.placeholder,
    disableOnPrefill: !!field.disableOnPrefill,
    hidden: !!field.hidden,
  };
}

function fieldIsCustomSystemName(field: InputBookingField): field is NameDefaultFieldInput_2024_06_14 {
  return "type" in field && field.type === "name";
}

function fieldIsCustomSystemNameSplit(
  field: InputBookingField
): field is SplitNameDefaultFieldInput_2024_06_14 {
  return "type" in field && field.type === "splitName";
}

function fieldIsCustomSystemEmail(field: InputBookingField): field is EmailDefaultFieldInput_2024_06_14 {
  return "type" in field && field.type === "email";
}

function fieldIsCustomSystemTitle(field: InputBookingField): field is TitleDefaultFieldInput_2024_06_14 {
  return "slug" in field && field.slug === "title";
}

function fieldIsCustomSystemNotes(field: InputBookingField): field is NotesDefaultFieldInput_2024_06_14 {
  return "slug" in field && field.slug === "notes";
}

function fieldIsCustomSystemGuests(field: InputBookingField): field is GuestsDefaultFieldInput_2024_06_14 {
  return "slug" in field && field.slug === "guests";
}

function fieldIsCustomSystemRescheduleReason(
  field: InputBookingField
): field is RescheduleReasonDefaultFieldInput_2024_06_14 {
  return "slug" in field && field.slug === "rescheduleReason";
}

function fieldIsDefaultAttendeePhone(field: InputBookingField): field is PhoneDefaultFieldOutput_2024_06_14 {
  return "slug" in field && field.slug === "attendeePhoneNumber";
}

function fieldIsDefaultSystemLocation(
  field: InputBookingField
): field is LocationDefaultFieldOutput_2024_06_14 {
  return "slug" in field && field.slug === "location";
}

function fieldIsSelect(
  field: InputBookingField
): field is
  | CheckboxGroupFieldInput_2024_06_14
  | RadioGroupFieldInput_2024_06_14
  | MultiSelectFieldInput_2024_06_14 {
  return (
    "type" in field && (field.type === "checkbox" || field.type === "radio" || field.type === "multiselect")
  );
}

export function transformSelectOptionsApiToInternal(options: string[]) {
  return options.map((option) => ({
    label: option,
    value: option,
  }));
}