import {z} from 'zod'

export type GetApiApiV0GraphPackagesSlugVersionArgs = {slug: string, version: string};

export type GetApiApiV0GraphPackagesSlugVersionOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const attributeFieldSpec = z.object({name: z.string(), kind: z.string(), required: z.boolean().optional(), description: z.string().optional(), enum_values: z.array(z.string()).nullable().optional(), label: z.string().nullable().optional(), instant: z.boolean().optional()});

export const patternCase = z.object({pattern: z.string().min(1).max(256), value: z.string().max(256)});

export const patternMapRule = z.object({kind: z.literal("pattern_map").optional(), source_field: z.string().optional(), cases: z.array(patternCase), default: z.string().nullable().optional()});

export const edgeDegreeRule = z.object({kind: z.literal("edge_degree").optional(), relationship_type_id: z.string().min(1), node_role: z.enum(["source", "target", "either"]).optional(), minimum: z.number().int().gte(0).optional()});

export const derivedPropertyDefOutput = z.object({id: z.string().min(1).max(64), description: z.string().optional(), rule: z.discriminatedUnion("kind", [patternMapRule, edgeDegreeRule]), label: z.string().nullable().optional()});

export const sourceBindingSpec = z.object({source_kind: z.string(), role: z.string(), field_map: z.record(z.string(), z.string()).optional()});

export const entityTypeCatalogItem = z.object({type_id: z.string(), display_name: z.string(), description: z.string(), tier: z.enum(["representation", "domain"]), attribute_fields: z.array(attributeFieldSpec), derived_properties: z.array(derivedPropertyDefOutput).optional(), origin: z.string(), editable: z.boolean(), public_id: z.string().nullable(), node_count: z.number().int(), source_bindings: z.array(sourceBindingSpec).optional(), edits_package: z.boolean().optional(), package_editable: z.boolean().optional(), package_attribute_names: z.array(z.string()).optional()});

export const relationshipTypeCatalogItem = z.object({type_id: z.string(), display_name: z.string(), description: z.string(), attribute_fields: z.array(attributeFieldSpec), origin: z.string(), editable: z.boolean(), public_id: z.string().nullable(), edits_package: z.boolean().optional(), package_editable: z.boolean().optional(), source_tier: z.enum(["representation", "domain"]), target_tier: z.enum(["representation", "domain"]), source_entity_type_ids: z.array(z.string()).optional(), target_entity_type_ids: z.array(z.string()).optional(), source_accepts_any: z.boolean().optional(), target_accepts_any: z.boolean().optional(), symmetric: z.boolean().optional(), edge_count: z.number().int(), source_bindings: z.array(sourceBindingSpec).optional()});

export const hierarchyLevelResponse = z.object({entity_type_id: z.string(), via_relationship_type_id: z.string().nullable().optional(), via_points_up: z.boolean().optional(), shadowed_by: z.array(z.string()).optional()});

export const packageContents = z.object({slug: z.string(), version: z.string(), display_name: z.string(), description: z.string(), entity_types: z.array(entityTypeCatalogItem), relationship_types: z.array(relationshipTypeCatalogItem), hierarchy: z.array(hierarchyLevelResponse).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
};

/**
 * Get KG package contents
 * 
 * GET /api/v0/graph-packages/{slug}/{version}
 */
export const getApiApiV0GraphPackagesSlugVersion = async (args: GetApiApiV0GraphPackagesSlugVersionArgs, options: GetApiApiV0GraphPackagesSlugVersionOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v0/graph-packages/${encodeURIComponent(String(args.slug))}/${encodeURIComponent(String(args.version))}${query.size > 0 ? `?${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(packageContents, await res.json())
};