import { generateId } from './_helpers';
import type { ManifestFunction } from './manifest-function';
import type { ManifestComponentDeletion, ManifestScope } from './manifest-builder';

export type WorkflowAutomationEventType =
  | 'AUTOMATION_EVENT_TYPE_BUSINESS'
  | 'AUTOMATION_EVENT_TYPE_RECORD_CHANGE'
  | 'AUTOMATION_EVENT_TYPE_SCHEDULED'
  | 'AUTOMATION_EVENT_TYPE_MANUAL'
  | 'AUTOMATION_EVENT_TYPE_DATE_RELATIVE';

export type WorkflowRecordChangeOperationType =
  | 'RECORD_CHANGE_OPERATION_TYPE_CREATE'
  | 'RECORD_CHANGE_OPERATION_TYPE_UPDATE'
  | 'RECORD_CHANGE_OPERATION_TYPE_DELETE'
  | 'RECORD_CHANGE_OPERATION_TYPE_CREATE_OR_UPDATE';

export type WorkflowDateRelativeOperatorType =
  | 'DATE_RELATIVE_TRIGGER_OPERATOR_TYPE_EQ'
  | 'DATE_RELATIVE_TRIGGER_OPERATOR_TYPE_WITHIN'
  | 'DATE_RELATIVE_TRIGGER_OPERATOR_TYPE_BETWEEN';

export type WorkflowScheduledFrequencyType =
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_DAILY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_WEEKDAY_DAILY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_WEEKLY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_BIWEEKLY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_MONTHLY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_MONTHLY_ON_DAY_OF_WEEK'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_ONE_TIME'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_QUARTERLY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_ANNUALLY'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_CUSTOM'
  | 'SCHEDULED_TRIGGER_FREQUENCY_TYPE_CRON';

export type WorkflowCustomScheduleFrequencyUnit =
  | 'CUSTOM_SCHEDULE_TRIGGER_FREQUENCY_UNIT_DAYS'
  | 'CUSTOM_SCHEDULE_TRIGGER_FREQUENCY_UNIT_WEEKS'
  | 'CUSTOM_SCHEDULE_TRIGGER_FREQUENCY_UNIT_MONTHS'
  | 'CUSTOM_SCHEDULE_TRIGGER_FREQUENCY_UNIT_YEARS'
  | 'CUSTOM_SCHEDULE_TRIGGER_FREQUENCY_UNIT_HOURS'
  | 'CUSTOM_SCHEDULE_TRIGGER_FREQUENCY_UNIT_MINUTES';

export interface WorkflowTimeOfDaySchedule {
  hour_of_day: number;
  minute_of_hour?: number;
}

export interface WorkflowOneTimeSchedule extends WorkflowTimeOfDaySchedule {
  year: number;
  month_of_year: number;
  day_of_month: number;
}

export interface WorkflowWeeklySchedule extends WorkflowTimeOfDaySchedule {
  day_of_week: number[];
}

export interface WorkflowMonthlySchedule extends WorkflowTimeOfDaySchedule {
  day_of_month: number;
  start_month?: number;
}

export interface WorkflowMonthlyOnDayOfWeekSchedule extends WorkflowTimeOfDaySchedule {
  day_of_week: number;
  day_of_month: number;
}

export interface WorkflowQuarterlySchedule extends WorkflowTimeOfDaySchedule {
  day_of_month: number;
  month_of_year: number;
}

export interface WorkflowAnnualSchedule extends WorkflowTimeOfDaySchedule {
  day_of_month: number;
  month_of_year: number;
  start_month?: number;
}

export interface WorkflowCronSchedule {
  cron_expression: string;
}

export interface WorkflowCustomSchedule extends WorkflowTimeOfDaySchedule {
  custom_schedule_frequency: WorkflowCustomScheduleFrequencyUnit;
  custom_schedule_frequency_value: number;
  daily_schedule?: WorkflowTimeOfDaySchedule;
  weekly_schedule?: WorkflowWeeklySchedule;
  monthly_schedule?: WorkflowMonthlySchedule;
  annual_schedule?: WorkflowAnnualSchedule;
}

export interface WorkflowTriggerBase {
  automation_event_type: WorkflowAutomationEventType;
  og_module?: string;
  base_model?: string;
  rql_formula?: string;
  is_basic_workflow?: boolean;
  og_category?: string;
  condition_builder_mode?: string;
  conditions_tree?: string;
}

export interface WorkflowBusinessTrigger extends WorkflowTriggerBase {
  automation_event_type: 'AUTOMATION_EVENT_TYPE_BUSINESS';
  event_name: string;
  business_event_trigger?: {
    navigation_path?: string;
  };
}

export interface WorkflowRecordChangeTrigger extends WorkflowTriggerBase {
  automation_event_type: 'AUTOMATION_EVENT_TYPE_RECORD_CHANGE';
  record_change_operation_type: WorkflowRecordChangeOperationType;
}

export interface WorkflowDateRelativeTrigger extends WorkflowTriggerBase {
  automation_event_type: 'AUTOMATION_EVENT_TYPE_DATE_RELATIVE';
  date_relative_trigger: {
    hour_of_day: number;
    minute_of_hour?: number;
    timezone?: string;
    base_model_date_field_rql_path?: string;
    trigger_on_anniversary?: boolean;
    date_range_operator?: WorkflowDateRelativeOperatorType;
    should_trigger_exactly_once_per_trigger_object?: boolean;
    operands?: Array<{ time_delta?: { days: number } }>;
  };
}

export interface WorkflowScheduledTrigger extends WorkflowTriggerBase {
  automation_event_type: 'AUTOMATION_EVENT_TYPE_SCHEDULED';
  scheduled_trigger: {
    frequency: WorkflowScheduledFrequencyType;
    timezone: string;
    daily_schedule?: WorkflowTimeOfDaySchedule;
    weekday_schedule?: WorkflowTimeOfDaySchedule;
    one_time_schedule?: WorkflowOneTimeSchedule;
    weekly_schedule?: WorkflowWeeklySchedule;
    bi_weekly_schedule?: WorkflowWeeklySchedule;
    monthly_schedule?: WorkflowMonthlySchedule;
    monthly_on_day_of_week_schedule?: WorkflowMonthlyOnDayOfWeekSchedule;
    quarterly_schedule?: WorkflowQuarterlySchedule;
    annual_schedule?: WorkflowAnnualSchedule;
    cron_schedule?: WorkflowCronSchedule;
    custom_schedule?: WorkflowCustomSchedule;
  };
}

export interface WorkflowManualTrigger extends WorkflowTriggerBase {
  automation_event_type: 'AUTOMATION_EVENT_TYPE_MANUAL';
}

export type WorkflowTrigger =
  | WorkflowBusinessTrigger
  | WorkflowRecordChangeTrigger
  | WorkflowDateRelativeTrigger
  | WorkflowScheduledTrigger
  | WorkflowManualTrigger;

export interface WorkflowDeletionIdentifier {
  definitionId: string;
}

export interface WorkflowProps {
  /**
   * Stable workflow definition id. Auto-generated when omitted.
   */
  definitionId?: string;
  /**
   * Workflow title shown to admins.
   */
  title: string;
  /**
   * Short workflow description shown to admins.
   */
  description: string;
  /**
   * The function this workflow runs. Pass a live {@link ManifestFunction} reference,
   * or a raw api_name string for functions defined outside this manifest.
   *
   * Required.
   */
  function: ManifestFunction | string;
  /**
   * Trigger definition in the workflows v2 proto JSON shape.
   */
  trigger: WorkflowTrigger;
}

/**
 * Defines a simple Workflow Studio workflow and registers it with the manifest.
 *
 * This intentionally models only the authoring inputs we need today: workflow
 * metadata, trigger JSON, and the function reference. The installer/backend can
 * derive the graph from these fields later.
 */
export class Workflow {
  static readonly componentType = 'WORKFLOW_DEFINITION' as const;

  static toDeletionIdentifier(identifier: WorkflowDeletionIdentifier | string): ManifestComponentDeletion {
    const definitionId = typeof identifier === 'string' ? identifier : identifier.definitionId;
    return {
      type: Workflow.componentType,
      definition_id: definitionId,
    };
  }

  private readonly _definitionId: string;
  private readonly _title: string;
  private readonly _description: string;
  private readonly _functionApiName: string;
  private readonly _trigger: WorkflowTrigger;

  constructor(scope: ManifestScope, props: WorkflowProps) {
    if (!props.function) throw new Error('function is required');
    this._definitionId = props.definitionId ?? generateId('workflow');
    this._title = props.title;
    this._description = props.description;
    this._functionApiName = typeof props.function === 'string' ? props.function : props.function.getApiName();
    this._trigger = props.trigger;
    scope._register(this);
  }

  getDefinitionId(): string {
    return this._definitionId;
  }

  toDict(): Record<string, any> {
    const component: Record<string, any> = {
      type: Workflow.componentType,
      definition_id: this._definitionId,
      version_status: 'VERSION_STATUS_DRAFT',
      trigger_status: 'TRIGGER_STATUS_INACTIVE',
      trigger: this._trigger,
      workflow_meta: {
        name: this._title,
        description: this._description,
      },
      function_api_name: this._functionApiName,
    };
    return component;
  }
}