import type { BotVersion } from '../botVersions/types'
import type { Service } from '../services/types'

// ─── Settings ─────────────────────────────────────────────────────────────────

export type BotCreatedVersion = 'v1' | 'v2' | 'v3'

export type BotLimitations = {
  hasInteractiveMessage?: boolean
  hasWebchatTrigger?: boolean
}

export type BotSettings = {
  /** If true, only the first matching rule per trigger fires; otherwise all matching rules fire. */
  sequentialRuleExecution?: boolean
  /** Version of the bot builder used to create this bot. v3 uses the visual flow builder. */
  botCreatedVersion?: BotCreatedVersion
  limitations?: BotLimitations
}

// ─── FlowJson ─────────────────────────────────────────────────────────────────

export type BotEvent =
  | 'MESSAGE_RECEIVED'
  | 'WIDGET_MESSAGE_RECEIVED'
  | 'USER_MESSAGE_SENT'
  | 'MANUAL_TICKET_OPENED'
  | 'TICKET_OPENED'
  | 'TICKET_CLOSED'
  | 'TICKET_BEFORE_CLOSE'
  | 'TICKET_INACTIVE'
  | 'ENTER_CONTEXT'
  | 'LEAVE_CONTEXT'
  | 'CONTACT_CREATED'
  | 'CONTACT_RECONNECTED'
  | 'API_SIGNAL'
  | 'ANONYMOUS_USER_CREATED_WEBCHAT'

export type BotFlowTriggerNode = {
  id: string
  type: 'triggerNode'
  position: { x: number; y: number }
  data: { trigger: BotEvent }
}

export type BotFlowMenuNodeAnswer = {
  id: string
  text: string
  fallback?: boolean
}

export type BotFlowMenuNode = {
  id: string
  type: 'menuNode'
  position: { x: number; y: number }
  data: {
    text: string
    answers?: BotFlowMenuNodeAnswer[]
  }
}

export type BotFlowNode = BotFlowTriggerNode | BotFlowMenuNode

export type BotFlowEdge = {
  id: string
  source: string
  target: string
  /** The answer handle ID on the source node this edge originates from, if any. */
  sourceHandle: string
}

/** Visual flow graph used by the flow builder UI. Gets compiled into `contexts` on save. */
export type BotFlowJson = {
  nodes: BotFlowNode[]
  edges: BotFlowEdge[]
}

// ─── Contexts ─────────────────────────────────────────────────────────────────

export type BotActionType =
  | 'SEND_MESSAGE'
  | 'SEND_TERM'
  | 'CONFIRM_TERM'
  | 'SEND_QUESTION'
  | 'WRITE_CUSTOM_FIELD'
  | 'TRANSFER_TICKET'
  | 'CLOSE_TICKET'
  | 'ADD_TAG'
  | 'REMOVE_TAG'
  | 'SET_CONTEXT'
  | 'RESET_CONTEXT'
  | 'UNSUBSCRIBE_FROM_CAMPAIGN'
  | 'SEND_WEBHOOK_COMMAND'
  | 'AI'
  | 'HTTP_REQUEST'
  | 'SET_VAR'

export type BotActionDataMap = {
  SEND_MESSAGE: {
    text?: string
    /** File UUID. */
    file?: string
    /** Message mask/template string. */
    mask?: string
    /** WhatsApp Business interactive message payload. */
    interactive?: unknown
    /** Quick reply buttons. */
    actions?: { title: string; value: string }[]
  }
  SEND_TERM: {
    /** Acceptance term UUID. */
    acceptanceTerms?: string
  }
  CONFIRM_TERM: {
    /** Acceptance term UUID to confirm. */
    confirmAcceptanceTerms?: string
  }
  SEND_QUESTION: {
    /** Question UUID. */
    question?: string
  }
  WRITE_CUSTOM_FIELD: {
    /** Custom field UUID. */
    customField?: string
    /** Custom field UUID (alias used in some versions). */
    customFieldId?: string
    /** Prompt text sent to the contact asking for input. */
    text?: string
    /** Number of retries before giving up. */
    tries?: number
    /** Message sent when the contact provides an invalid value. */
    invalidMessage?: string
    /** Context ID to navigate to on success. */
    successContext?: string
    /** Context ID to navigate to on failure. */
    fallbackContext?: string
  }
  TRANSFER_TICKET: {
    /** Department UUID. */
    department?: string
    /** User UUID. */
    user?: string
  }
  CLOSE_TICKET: {
    /** Ticket topic UUIDs. */
    ticketTopics?: string[]
    comments?: string
  }
  ADD_TAG: {
    /** Tag UUIDs to add to the contact. */
    tags: string[]
  }
  REMOVE_TAG: {
    /** Tag UUIDs to remove from the contact. */
    tags: string[]
  }
  SET_CONTEXT: {
    /** Context ID to navigate to. */
    context?: string
  }
  RESET_CONTEXT: Record<string, never>
  UNSUBSCRIBE_FROM_CAMPAIGN: Record<string, never>
  SEND_WEBHOOK_COMMAND: {
    command?: string
  }
  AI: {
    /** AI agent UUID. */
    agentId?: string
    prompt?: string
    maxAttempts?: number
    /** Actions to take based on AI agent outcomes. */
    actions?: { context?: string; action: { id: string; type: string } }[]
  }
  HTTP_REQUEST: {
    requestName?: string
    endpointUrl?: string
    httpMethod?: 'get' | 'post' | 'put' | 'patch' | 'delete'
    isAsyncRequest?: boolean
    bodyType?: 'json' | 'xml' | 'formData' | 'empty'
    headers?: { key: string; value: string }[]
    requestBodyFormData?: { key: string; value: string }[]
    requestBodyJson?: string
    requestBodyXml?: string
    retries?: number
    /** Timeout in milliseconds. */
    timeout?: number
    /** Response properties to extract into bot session variables. */
    variables?: { key: string; value: string }[]
  }
  SET_VAR: {
    /** Session variable name. */
    key: string
    /** Value to assign (supports interpolation via `{{variable}}`). */
    value: string
  }
}

export type BotAction = {
  [K in BotActionType]: {
    value: K
    name?: string
    data: BotActionDataMap[K]
  }
}[BotActionType]

/**
 * A simple condition matching a single variable against a value.
 * Key is a variable placeholder like `{{message_text}}` or `{{@customVar}}`.
 * Value is an object with one operator key (e.g. `$eq`, `$in`, `$between`).
 */
export type BotSimpleCondition = {
  [variable: string]: {
    [operator: string]: string | string[] | number | boolean
  }
}

/** Groups multiple simple conditions with a logical AND or OR. */
export type BotGroupCondition = {
  $and?: BotSimpleCondition[]
  $or?: BotSimpleCondition[]
}

export type BotCondition = BotSimpleCondition | BotGroupCondition

export type BotRule = {
  title: string
  actions: BotAction[]
  conditions: BotCondition[]
  fallbackActions: BotAction[]
  data?: Record<string, unknown>
}

export type BotContext = {
  name: string
  /** Map of event type to ordered list of rules evaluated when that event fires. */
  triggers: Partial<Record<BotEvent, BotRule[]>>
}

/**
 * Map of context IDs to their configuration.
 * `@INIT`, `@EVERY`, and `@FALLBACK` are always present built-in contexts.
 * Additional string keys are user-defined context IDs.
 */
export type BotContexts = {
  '@INIT': BotContext
  '@EVERY': BotContext
  '@FALLBACK': BotContext
  [contextId: string]: BotContext
}

// ─── Bot ──────────────────────────────────────────────────────────────────────

export type Bot = {
  id: string
  name: string
  data: Record<string, unknown>
  contexts: BotContexts
  flowJson: BotFlowJson | null
  settings: BotSettings
  currentBotVersionId: string | null
  accountId: string
  createdAt: string
  updatedAt: string
  deletedAt: string | null
  // relationships
  currentBotVersion?: BotVersion | null
  services?: Service[]
}

export type CreateBotPayload = {
  name: string
  data?: Record<string, unknown>
  contexts?: BotContexts
  flowJson?: BotFlowJson
  settings?: BotSettings
}

export type BotRelationships = 'currentBotVersion' | 'services'

export type UpdateBotPayload = {
  name?: string
  data?: Record<string, unknown>
  contexts?: BotContexts
  flowJson?: BotFlowJson
  settings?: BotSettings
  currentBotVersionId?: string | null
}