import {z} from 'zod'

export type ElementalContentSugar = {title: string, body: string};

export type TextAlign = 'left' | 'center' | 'right';

export type TextStyle = 'text' | 'h1' | 'h2' | 'subtext';

export type Locale = {content: string};

export type Locales = {[key: string]: Locale} | null;

export type IAlignment = 'center' | 'left' | 'right' | 'full';

export type IActionButtonStyle = 'button' | 'link';

export type ElementalNode = {type: 'text', content: string, align: TextAlign, text_style?: TextStyle | undefined, color?: (string | null) | undefined, bold?: (string | null) | undefined, italic?: (string | null) | undefined, strikethrough?: (string | null) | undefined, underline?: (string | null) | undefined, font_size?: (string | null) | undefined, line_height?: (string | null) | undefined, locales?: Locales | undefined, format?: ('markdown' | null) | undefined, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'meta', title?: (string | null) | undefined, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'channel', channel: string, padding?: (string | null) | undefined, font_size?: (string | null) | undefined, line_height?: (string | null) | undefined, raw?: ({[key: string]: unknown} | null) | undefined, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'image', src: string, href?: (string | null) | undefined, align?: IAlignment | undefined, altText?: (string | null) | undefined, width?: (string | null) | undefined, border_color?: (string | null) | undefined, border_size?: (string | null) | undefined, padding?: (string | null) | undefined, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'action', content: string, href: string, action_id?: (string | null) | undefined, align?: (IAlignment | null) | undefined, background_color?: (string | null) | undefined, border_radius?: (string | null) | undefined, border_size?: (string | null) | undefined, font_size?: (string | null) | undefined, padding?: (string | null) | undefined, disable_tracking?: (boolean | null) | undefined, style?: (IActionButtonStyle | null) | undefined, locales: Locales, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'divider', color?: (string | null) | undefined, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'quote', content: string, align?: IAlignment | undefined, borderColor?: (string | null) | undefined, text_style: TextStyle, font_size?: (string | null) | undefined, line_height?: (string | null) | undefined, locales: Locales, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined} | {type: 'html', content: string, locales?: Locales | undefined, channels?: (Array<string> | null) | undefined, ref?: (string | null) | undefined, if?: (string | null) | undefined, loop?: (string | null) | undefined};

export type ElementalContent = {version: string, elements: Array<ElementalNode>};

export type Content = ElementalContentSugar | ElementalContent;

export type MessageData = {[key: string]: unknown};

export type RoutingMethod = 'all' | 'single';

export type Timeouts = {provider?: (number | null) | undefined, channel?: (number | null) | undefined};

export type UTM = {source?: (string | null) | undefined, medium?: (string | null) | undefined, campaign?: (string | null) | undefined, term?: (string | null) | undefined, content?: (string | null) | undefined};

export type ChannelMetadata = {utm?: UTM | undefined};

export type Channel = {brand_id?: (string | null) | undefined, providers?: (Array<string> | null) | undefined, routing_method?: RoutingMethod | undefined, if?: (string | null) | undefined, timeouts?: Timeouts | undefined, override?: ({[key: string]: unknown} | null) | undefined, metadata?: ChannelMetadata | undefined};

export type MessageChannels = {[key: string]: Channel};

export type MessageContext = {tenant_id?: (string | null) | undefined};

export type MessageMetadata = {event?: (string | null) | undefined, tags?: (Array<string> | null) | undefined, utm?: UTM | undefined, trace_id?: (string | null) | undefined};

export type MessagePreferences = {subscription_topic_id: string};

export type Metadata = {utm?: UTM | undefined};

export type MessageProvidersType = {override?: ({[key: string]: unknown} | null) | undefined, if?: (string | null) | undefined, timeouts?: (number | null) | undefined, metadata?: Metadata | undefined};

export type MessageProviders = {[key: string]: MessageProvidersType};

export type MessageRoutingMethod = 'all' | 'single';

export type MessageRouting = {method: MessageRoutingMethod, channels: Array<MessageRoutingChannel>};

export type MessageRoutingChannel = string | MessageRouting;

export type Routing = {method: RoutingMethod, channels: Array<MessageRoutingChannel>};

export type Criteria = 'no-escalation' | 'delivered' | 'viewed' | 'engaged';

export type Timeout = {provider?: ({[key: string]: number} | null) | undefined, channel?: ({[key: string]: number} | null) | undefined, message?: (number | null) | undefined, escalation?: (number | null) | undefined, criteria?: Criteria | undefined};

export type Delay = {duration?: (number | null) | undefined, until?: (string | null) | undefined, timezone?: (string | null) | undefined};

export type ExpiresInType = string | number;

export type Expiry = {expires_at?: (string | null) | undefined, expires_in: ExpiresInType};

export type UserRecipient = Record<string, never>;

export type AudienceFilter = {operator: 'MEMBER_OF', path: 'account_id', value: string};

export type AudienceRecipient = {audience_id: string, data?: MessageData | undefined, filters?: (Array<AudienceFilter> | null) | undefined};

export type ListFilter = {operator: 'MEMBER_OF', path: 'account_id', value: string};

export type ListRecipient = {list_id?: (string | null) | undefined, data?: MessageData | undefined, filters?: (Array<ListFilter> | null) | undefined};

export type ListPatternRecipient = {list_pattern?: (string | null) | undefined, data?: MessageData | undefined};

export type SendToSlackChannel = {access_token: string, channel: string};

export type SendToSlackEmail = {access_token: string, email: string};

export type SendToSlackUserId = {access_token: string, user_id: string};

export type Slack = SendToSlackChannel | SendToSlackEmail | SendToSlackUserId;

export type SlackRecipient = {slack: Slack};

export type SendToMsTeamsUserId = {tenant_id: string, service_url: string, user_id: string};

export type SendToMsTeamsEmail = {tenant_id: string, service_url: string, email: string};

export type SendToMsTeamsChannelId = {tenant_id: string, service_url: string, channel_id: string};

export type SendToMsTeamsConversationId = {tenant_id: string, service_url: string, conversation_id: string};

export type SendToMsTeamsChannelName = {tenant_id: string, service_url: string, channel_name: string, team_id: string};

export type MsTeams = SendToMsTeamsUserId | SendToMsTeamsEmail | SendToMsTeamsChannelId | SendToMsTeamsConversationId | SendToMsTeamsChannelName;

export type MsTeamsRecipient = {ms_teams: MsTeams};

export type Pagerduty = {routing_key?: (string | null) | undefined, event_action?: (string | null) | undefined, severity?: (string | null) | undefined, source?: (string | null) | undefined};

export type PagerdutyRecipient = {pagerduty: Pagerduty};

export type WebhookMethod = 'POST' | 'PUT';

export type WebhookAuthMode = 'none' | 'basic' | 'bearer';

export type WebhookAuthentication = {mode: WebhookAuthMode, username?: (string | null) | undefined, password?: (string | null) | undefined, token?: (string | null) | undefined};

export type WebhookProfileType = 'limited' | 'expanded';

export type WebhookProfile = {url: string, method?: WebhookMethod | undefined, headers?: ({[key: string]: string} | null) | undefined, authentication?: WebhookAuthentication | undefined, profile?: WebhookProfileType | undefined};

export type WebhookRecipient = {webhook: WebhookProfile};

export type Recipient = UserRecipient | AudienceRecipient | ListRecipient | ListPatternRecipient | SlackRecipient | MsTeamsRecipient | PagerdutyRecipient | WebhookRecipient;

export type MessageRecipient = Recipient | Array<Recipient>;

export type Message = {content?: Content | undefined, template?: (string | null) | undefined, data?: MessageData | undefined, brand_id?: (string | null) | undefined, channels?: MessageChannels | undefined, context?: MessageContext | undefined, metadata?: MessageMetadata | undefined, preferences?: MessagePreferences | undefined, providers?: MessageProviders | undefined, routing?: Routing | undefined, timeout?: Timeout | undefined, delay?: Delay | undefined, expiry?: Expiry | undefined, to?: MessageRecipient | undefined};

export type CreateApiSendArgs = {'Idempotency-Key'?: string | undefined, 'x-idempotency-expiration'?: string | undefined, body: {message: Message}};

export type CreateApiSendOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const sendMessageResponse = z.object({requestId: z.string()});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Send a message
 * 
 * POST /send
 */
export const createApiSend = async (args: CreateApiSendArgs, options?: CreateApiSendOptions) => {
const {baseUrl = "https://api.courier.com", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('content-type', "application/json")
headers.set('accept', "application/json")

if (args['Idempotency-Key'] != null) headers.set("Idempotency-Key", String(args['Idempotency-Key']))
if (args['x-idempotency-expiration'] != null) headers.set("x-idempotency-expiration", String(args['x-idempotency-expiration']))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/send${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(sendMessageResponse, await res.json())
};