import {z} from 'zod'

export type GetApiV2TenantSlugCasesCaseIdArgs = {tenant_slug: string, case_id: string};

export type GetApiV2TenantSlugCasesCaseIdOptions = {baseUrl?: string | undefined, oauth2?: string | undefined, fetch?: typeof fetch | undefined};

export const caseStatus = z.enum(["OPEN", "CLOSED"]);

export const sessionStatus = z.enum(["ACTIVE", "FINISHED"]);

export const caseState = z.object({state_id: z.string(), case_status: caseStatus, session_status: sessionStatus, score: z.number().int().gte(1).lte(5), changed_at: z.string(), changed_by: z.string().min(1).optional(), reason: z.string().min(1)});

export const fraudLabels = z.enum(["Bot", "Synthetic", "Account Takeover", "Organic"]);

export const recommendedAction = z.enum(["MONITOR", "CHALLENGE", "BLOCK", "ESCALATE"]);

export const caseDetails = z.object({overall_risk_score: z.number().int().gte(1).lte(5), fraud_labels: z.array(fraudLabels), primary_fraud_label: fraudLabels, summary: z.string().nullable(), highlights: z.array(z.string()).optional(), recommended_action: recommendedAction.nullable().optional()});

export const fraudTypes = z.enum(["Bot Creation", "Synthetic Fraud", "Account Takeover", "Organic Fraud"]);

export const shapContributor = z.object({feature: z.string().min(1), plain_name: z.string().nullable().optional(), feature_value: z.union([z.number(), z.number().int(), z.string(), z.boolean()]).nullable().optional(), shap_value: z.number().nullable().optional(), direction: z.string().nullable().optional(), alignment: z.string().nullable().optional(), impact_level: z.string().nullable().optional(), direction_specific: z.string().nullable().optional(), description: z.string().nullable().optional()});

export const modelBehaviour = z.object({type: z.string().min(1), model_name: z.string().min(1), top_contributors: z.array(shapContributor).optional()});

export const fraudExplanation = z.object({fraud_reason: z.string().min(1), fraud_reason_description: z.string().min(1), fraud_types: z.array(fraudTypes), model_behaviour: z.array(modelBehaviour).nullable().optional()});

export const detailedFraudOccurrence = z.object({occurrence_id: z.string(), prediction_id: z.string().min(1), session_id: z.string().min(1), generated_at: z.string(), risk_score: z.number().int().gte(1).lte(5), explanation: fraudExplanation});

export const caseSingleResponse = z.object({case_id: z.string(), tenant_id: z.string(), website_account_id: z.string().optional(), session_id: z.string(), unique_id: z.string(), end_user_is_blocked: z.boolean(), status: caseStatus, created_at: z.string(), updated_at: z.string().nullable().optional(), case_version: z.number().int().optional(), current_state: caseState.nullable().optional(), state_history: z.array(caseState).nullable().optional(), details: caseDetails, fraud_occurrences: z.record(z.string(), detailedFraudOccurrence).optional()});

export const aPIResponseCaseSingleResponse = z.object({data: caseSingleResponse});

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 a case
 * 
 * GET /v2/{tenant_slug}/cases/{case_id}
 */
export const getApiV2TenantSlugCasesCaseId = async (args: GetApiV2TenantSlugCasesCaseIdArgs, options?: GetApiV2TenantSlugCasesCaseIdOptions) => {
const {baseUrl = "https://api.demo-retail.urbanfox.io", fetch: fetchFn = fetch, oauth2} = options ?? {}

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

if (oauth2 !== undefined) headers.set('authorization', `Bearer ${oauth2}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v2/${encodeURIComponent(String(args.tenant_slug))}/cases/${encodeURIComponent(String(args.case_id))}${query.size > 0 ? `?${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(aPIResponseCaseSingleResponse, await res.json())
};