import "server-only";

import { queryAdminRows } from "./database";
import type { AdminSession } from "./auth";

export type RedemptionCodeRecord = {
  id: string;
  mask: string;
  credits: number;
  expiresAt: string | null;
  note: string | null;
  createdAt: string;
  redeemedBy: string | null;
  redeemedEmail: string | null;
  redeemedAt: string | null;
  revokedBy: string | null;
  revokedAt: string | null;
  status: "available" | "expired" | "redeemed" | "revoked";
};

type RpcCodeRow = {
  id: string;
  code_mask: string;
  credits: number;
  expires_at: Date | string | null;
  note: string | null;
  created_at: Date | string;
  redeemed_by: string | null;
  redeemed_email: string | null;
  redeemed_at: Date | string | null;
  revoked_by: string | null;
  revoked_at: Date | string | null;
};

type CodeRpcArgs = {
  admin_create_redemption_codes: {
    p_codes: unknown;
    p_reason: string;
  };
  admin_update_redemption_code: {
    p_code_id: string;
    p_set_note: boolean;
    p_note: string | null;
    p_set_expires_at: boolean;
    p_expires_at: string | null;
    p_reason: string;
  };
  admin_revoke_redemption_code: {
    p_code_id: string;
    p_reason: string;
  };
};

function isoTimestamp(value: Date | string | null): string | null {
  return value instanceof Date ? value.toISOString() : value;
}

export function codeStatus(row: RpcCodeRow): RedemptionCodeRecord["status"] {
  const expiresAt = isoTimestamp(row.expires_at);
  if (row.redeemed_at) return "redeemed";
  if (row.revoked_at) return "revoked";
  if (expiresAt && Date.parse(expiresAt) <= Date.now()) return "expired";
  return "available";
}

export function mapCode(row: RpcCodeRow): RedemptionCodeRecord {
  const expiresAt = isoTimestamp(row.expires_at);
  const redeemedAt = isoTimestamp(row.redeemed_at);
  const revokedAt = isoTimestamp(row.revoked_at);
  return {
    id: row.id,
    mask: row.code_mask,
    credits: row.credits,
    expiresAt,
    note: row.note,
    createdAt: isoTimestamp(row.created_at)!,
    redeemedBy: row.redeemed_by,
    redeemedEmail: row.redeemed_email,
    redeemedAt,
    revokedBy: row.revoked_by,
    revokedAt,
    status: codeStatus({
      ...row,
      expires_at: expiresAt,
      created_at: isoTimestamp(row.created_at)!,
      redeemed_at: redeemedAt,
      revoked_at: revokedAt,
    }),
  };
}

export async function runCodeRpc<T extends keyof CodeRpcArgs>(
  functionName: T,
  session: Pick<AdminSession, "user">,
  id: string,
  args: CodeRpcArgs[T],
): Promise<RedemptionCodeRecord[]> {
  const common = [
    session.user.id,
    session.user.email,
    "admin",
    id,
  ];
  let rows: RpcCodeRow[] = [];

  switch (functionName) {
    case "admin_create_redemption_codes": {
      const input = args as CodeRpcArgs["admin_create_redemption_codes"];
      rows = await queryAdminRows<RpcCodeRow>(
        `select * from public.admin_create_redemption_codes(
          $1::uuid,$2::text,$3::text,$4::text,$5::jsonb,$6::text
        )`,
        [...common, JSON.stringify(input.p_codes), input.p_reason],
      );
      break;
    }
    case "admin_update_redemption_code": {
      const input = args as CodeRpcArgs["admin_update_redemption_code"];
      rows = await queryAdminRows<RpcCodeRow>(
        `select * from public.admin_update_redemption_code(
          $1::uuid,$2::text,$3::text,$4::text,$5::uuid,
          $6::boolean,$7::text,$8::boolean,$9::timestamptz,$10::text
        )`,
        [
          ...common,
          input.p_code_id,
          input.p_set_note,
          input.p_note,
          input.p_set_expires_at,
          input.p_expires_at,
          input.p_reason,
        ],
      );
      break;
    }
    case "admin_revoke_redemption_code": {
      const input = args as CodeRpcArgs["admin_revoke_redemption_code"];
      rows = await queryAdminRows<RpcCodeRow>(
        `select * from public.admin_revoke_redemption_code(
          $1::uuid,$2::text,$3::text,$4::text,$5::uuid,$6::text
        )`,
        [...common, input.p_code_id, input.p_reason],
      );
      break;
    }
  }

  return rows.map(mapCode);
}