import {z} from 'zod'

export type DraftStatus = 'draft' | 'submitted' | 'approved' | 'sending' | 'sent' | 'failed' | 'discarded';

export type GetApiV1EmailDraftsArgs = {session_id?: (string | null) | undefined, status?: (DraftStatus | null) | undefined, cursor?: (string | null) | undefined, limit?: number | undefined};

export type GetApiV1EmailDraftsOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const draftMode = z.enum(["human_only", "copilot"]);

export const draftStatus = z.enum(["draft", "submitted", "approved", "sending", "sent", "failed", "discarded"]);

export const draftApprovalState = z.enum(["unsubmitted", "pending", "approved", "rejected", "auto_approved"]);

export const emailAddress = z.object({address: z.string().max(320), name: z.string().max(255).nullable().optional()});

export const draftResponse = z.object({id: z.string(), organization_id: z.string(), session_id: z.string(), account_id: z.string(), agent_id: z.string().nullable(), in_reply_to_turn_id: z.string().nullable(), mode: draftMode, status: draftStatus, approval_state: draftApprovalState, subject: z.string(), body_html: z.string(), body_text: z.string().nullable(), to: z.array(emailAddress), cc: z.array(emailAddress), bcc: z.array(emailAddress), reply_to: z.array(emailAddress), approved_by_member_id: z.string().nullable(), approved_at: z.string().nullable(), sent_turn_id: z.string().nullable(), evidence_snapshot: z.record(z.string(), z.unknown()).nullable(), auto_send_reason: z.string().nullable(), discarded_by_member_id: z.string().nullable(), discarded_at: z.string().nullable(), created_at: z.string(), updated_at: z.string()});

export const listDraftsResponse = z.object({drafts: z.array(draftResponse), next_cursor: z.string().nullable().optional()});

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
};

/**
 * List drafts for the caller's organization
 * 
 * GET /v1/email/drafts
 */
export const getApiV1EmailDrafts = async (args: GetApiV1EmailDraftsArgs, options: GetApiV1EmailDraftsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.session_id != null) query.append("session_id", String(args.session_id))
if (args.status != null) query.append("status", String(args.status))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.limit != null) query.append("limit", String(args.limit))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/email/drafts${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

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

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