import {z} from 'zod'

export type GetApiReportsKeyRenderArgs = {key: string, format?: string | undefined, table?: string | undefined, actions?: string | undefined};

export type GetApiReportsKeyRenderOptions = {baseUrl?: string | undefined, Bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const reportHeader = z.object({title: z.string().optional(), subtitle: z.string().nullable().optional(), clinicName: z.string().optional(), periodLabel: z.string().optional(), generatedAt: z.string().optional()});

export const reportAccent = z.enum(["Blue", "Green", "Orange", "Teal", "Purple", "Grey"]);

export const reportValueType = z.enum(["Text", "CurrencySummary", "CurrencyExact", "Percent", "Count", "Duration", "Status", "Date", "Trend"]);

export const reportValueState = z.enum(["Normal", "NoDataYet", "NotConfigured"]);

export const reportTone = z.enum(["Neutral", "Positive", "Negative"]);

export const reportEntityKind = z.enum(["None", "Client", "Patient"]);

export const reportValue = z.object({type: reportValueType.optional(), number: z.union([z.number(), z.string()]).nullable().optional(), text: z.string().nullable().optional(), state: reportValueState.optional(), tone: reportTone.optional(), decimals: z.union([z.number().int(), z.string()]).nullable().optional(), entityKind: reportEntityKind.optional(), entityId: z.string().nullable().optional()});

export const reportStatCard = z.object({label: z.string().optional(), value: reportValue.optional(), caption: z.string().nullable().optional(), captionTone: reportTone.optional()});

export const reportOutputs = z.string();

export const reportAlign = z.unknown();

export const reportColumn = z.object({key: z.string().optional(), label: z.string().optional(), type: reportValueType.optional(), relativeWidth: z.union([z.number(), z.string()]).optional(), fixedWidth: z.union([z.number(), z.string()]).nullable().optional(), align: reportAlign.nullable().optional(), targets: reportOutputs.optional()});

export const reportRowStyle = z.enum(["Normal", "Header", "Total"]);

export const reportRow = z.object({cells: z.record(z.string(), reportValue).optional(), style: reportRowStyle.optional(), indent: z.union([z.number().int(), z.string()]).optional()});

export const reportAction = z.object({action: z.string().optional(), owner: z.string().nullable().optional(), due: z.string().nullable().optional(), rationale: z.string().nullable().optional()});

export const reportNoteTone = z.enum(["Info", "Warning", "Rule"]);

export const reportBlock = z.discriminatedUnion("kind", [z.object({kind: z.literal("statCards"), cards: z.array(reportStatCard).optional(), targets: reportOutputs.optional()}), z.object({kind: z.literal("table"), key: z.string().optional(), title: z.string().nullable().optional(), subtitle: z.string().nullable().optional(), columns: z.array(reportColumn).optional(), rows: z.array(reportRow).optional(), pdfRowLimit: z.union([z.number().int(), z.string()]).nullable().optional(), dense: z.boolean().optional(), csvIncludeStyleColumns: z.boolean().optional(), targets: reportOutputs.optional()}), z.object({kind: z.literal("actions"), title: z.string().optional(), actions: z.array(reportAction).optional(), targets: reportOutputs.optional()}), z.object({kind: z.literal("note"), text: z.string().optional(), tone: reportNoteTone.optional(), targets: reportOutputs.optional()})]);

export const reportSection = z.object({title: z.string().nullable().optional(), accent: reportAccent.optional(), pageBreakAfter: z.boolean().optional(), blocks: z.array(reportBlock).optional()});

export const reportDocument = z.object({header: reportHeader.optional(), sections: z.array(reportSection).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
};

/**
 * Render a report. Remaining query parameters (period, mode, …) are passed to the
 * report's data provider; its descriptor documents which ones it understands.
 * 
 * GET /Reports/{key}/render
 */
export const getApiReportsKeyRender = async (args: GetApiReportsKeyRenderArgs, options?: GetApiReportsKeyRenderOptions) => {
const {baseUrl = "https://api.clinicos.vet/backend/business", fetch: fetchFn = fetch, Bearer} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/Reports/${encodeURIComponent(String(args.key))}/render${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(reportDocument, await res.json())
};