import {z} from 'zod'

export type DateISO = string;

export type GetApiTasksArgs = {limit?: number | undefined, cursor?: string | undefined, modifiedSince?: DateISO | undefined, modifiedUntil?: DateISO | undefined, candidateIds?: Array<string> | undefined, clientContactIds?: Array<string> | undefined, vacancyIds?: Array<string> | undefined, companyIds?: Array<string> | undefined, opportunityIds?: Array<string> | undefined, sources?: (Array<'MANUAL' | 'AI_SUGGESTION' | 'OUTREACH_SEQUENCE_STEP' | 'AUTOMATION'>) | undefined, labelIds?: Array<string> | undefined};

export type GetApiTasksOptions = {baseUrl: string, xApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const dateISO = z.string();

export const userBadgeDto = z.object({id: z.string(), name: z.string(), avatarUrl: z.string().nullable(), deactivatedAt: dateISO.nullable()});

export const taskMetadataDto = z.union([z.object({outreachSequenceId: z.string(), outreachSequenceName: z.string(), outreachSequenceRunId: z.string(), type: z.literal("GENERIC_TASK")}), z.object({outreachSequenceId: z.string(), outreachSequenceName: z.string(), outreachSequenceRunId: z.string(), type: z.literal("PHONE_CALL_TASK"), phoneNumber: z.string().nullable()}), z.object({outreachSequenceId: z.string(), outreachSequenceName: z.string(), outreachSequenceRunId: z.string(), type: z.literal("LINKEDIN_CONNECTION_REQUEST_TASK"), linkedInUrl: z.string().nullable()}), z.object({outreachSequenceId: z.string(), outreachSequenceName: z.string(), outreachSequenceRunId: z.string(), type: z.literal("LINKEDIN_MESSAGE_TASK"), linkedInUrl: z.string().nullable(), messageBody: z.string().nullable()}), z.object({outreachSequenceId: z.string(), outreachSequenceName: z.string(), outreachSequenceRunId: z.string(), type: z.literal("WHATSAPP_MESSAGE_TASK"), phoneNumber: z.string().nullable(), messageBody: z.string().nullable()})]);

export const taskLabelDto = z.object({id: z.string(), name: z.string(), colorHex: z.string()});

export const taskLinkIdDto = z.object({id: z.string()});

export const getTaskLinksDto = z.object({candidates: z.array(taskLinkIdDto), vacancies: z.array(taskLinkIdDto), clients: z.array(taskLinkIdDto), users: z.array(taskLinkIdDto), teams: z.array(taskLinkIdDto), clientContacts: z.array(taskLinkIdDto), opportunities: z.array(taskLinkIdDto)});

export const getTaskDto = z.object({id: z.string(), content: z.string(), dueDate: dateISO.nullable(), isCompleted: z.boolean(), completedAt: dateISO.nullable(), createdAt: dateISO, createdBy: userBadgeDto.nullable(), assignedTo: userBadgeDto.nullable(), source: z.enum(["MANUAL", "AI_SUGGESTION", "OUTREACH_SEQUENCE_STEP", "AUTOMATION"]), metadata: taskMetadataDto.nullable(), labels: z.array(taskLabelDto), links: getTaskLinksDto});

export const cursorPageInfoDto = z.object({nextCursor: z.string().nullable(), hasNextPage: z.boolean()});

export const getTasksResponseDto = z.object({items: z.array(getTaskDto), pageInfo: cursorPageInfoDto});

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 tasks
 * 
 * GET /tasks
 */
export const getApiTasks = async (args: GetApiTasksArgs, options: GetApiTasksOptions) => {
const {baseUrl, fetch: fetchFn = fetch, xApiKey} = 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 (args.cursor != null) query.append("cursor", String(args.cursor))
if (args.modifiedSince != null) query.append("modifiedSince", String(args.modifiedSince))
if (args.modifiedUntil != null) query.append("modifiedUntil", String(args.modifiedUntil))
for (const item of args.candidateIds ?? []) query.append("candidateIds", String(item))
for (const item of args.clientContactIds ?? []) query.append("clientContactIds", String(item))
for (const item of args.vacancyIds ?? []) query.append("vacancyIds", String(item))
for (const item of args.companyIds ?? []) query.append("companyIds", String(item))
for (const item of args.opportunityIds ?? []) query.append("opportunityIds", String(item))
for (const item of args.sources ?? []) query.append("sources", String(item))
for (const item of args.labelIds ?? []) query.append("labelIds", String(item))
if (xApiKey !== undefined) headers.set("x-api-key", xApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/tasks${query.size > 0 ? `?${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(getTasksResponseDto, await res.json())
};