import {z} from 'zod'

export type GetApiApiV1ContextIdStateArgs = {context_id: string, limit?: number | undefined};

export type GetApiApiV1ContextIdStateOptions = {baseUrl: string, apiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const memoryCategory = z.enum(["identity", "knowledge", "context"]);

export const sourceRefJson = z.object({kind: z.string(), ref: z.string().nullable().optional(), sessionId: z.string().nullable().optional()});

export const actionDetailJson = z.object({actor: z.string(), confidence: z.number(), createdAt: z.string(), id: z.string(), memoryCategory: memoryCategory, object: z.string().nullable().optional(), objectText: z.string().nullable().optional(), occurredAt: z.string().nullable().optional(), source: sourceRefJson.nullable().optional(), summary: z.string(), validFrom: z.string().nullable().optional(), validUntil: z.string().nullable().optional(), verb: z.string()});

export const attributeDetailJson = z.object({createdAt: z.string(), entity: z.string(), id: z.string(), importance: z.number(), key: z.string(), memoryCategory: memoryCategory, source: sourceRefJson.nullable().optional(), supersededBy: z.string().nullable().optional(), supersedes: z.string().nullable().optional(), validFrom: z.string().nullable().optional(), validUntil: z.string().nullable().optional(), value: z.string()});

export const entityDetailJson = z.object({createdAt: z.string(), entityType: z.string(), id: z.string(), importance: z.number(), memoryCategory: memoryCategory, name: z.string(), updatedAt: z.string()});

export const relationDetailJson = z.object({createdAt: z.string(), id: z.string(), label: z.string(), memoryCategory: memoryCategory, object: z.string(), source: sourceRefJson.nullable().optional(), subject: z.string(), validFrom: z.string().nullable().optional(), validUntil: z.string().nullable().optional()});

export const categoryStateJson = z.object({actions: z.array(actionDetailJson), attributes: z.array(attributeDetailJson), entities: z.array(entityDetailJson), relations: z.array(relationDetailJson)});

export const instructionSummaryJson = z.object({description: z.string(), id: z.string(), label: z.string()});

export const stateTruncationJson = z.object({actions: z.boolean(), attributes: z.boolean(), entities: z.boolean(), instructions: z.boolean(), relations: z.boolean(), unknowns: z.boolean()});

export const uncertaintySummaryJson = z.object({about: z.string(), reason: z.string()});

export const stateResponseJson = z.object({context: categoryStateJson, identity: categoryStateJson, instructions: z.array(instructionSummaryJson), knowledge: categoryStateJson, truncated: stateTruncationJson, unknowns: z.array(uncertaintySummaryJson)});

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
};

/**
 * Get the structured memory state grouped by category. This is a composite read over six tables, each bounded by `limit` (default 100, max 500); `truncated` reports which tables had more rows. It is a snapshot, not an export: to enumerate a table completely, walk `/entities`, `/attributes`, `/relations`, or `/actions` instead.
 * 
 * GET /api/v1/{context_id}/state
 */
export const getApiApiV1ContextIdState = async (args: GetApiApiV1ContextIdStateArgs, options: GetApiApiV1ContextIdStateOptions) => {
const {baseUrl, fetch: fetchFn = fetch, apiKey} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (apiKey !== undefined) headers.set('authorization', `Bearer ${apiKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/${encodeURIComponent(String(args.context_id))}/state${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(stateResponseJson, await res.json())
};