import { Prisma } from "@prisma/client";
import { PrismaClientKnownRequestError } from "@prisma/client/runtime";
import { Request, Response } from "express";
import prisma from "../lib/prisma";
import { DurationSchemaT, parseSchema, PointSchemaT } from "../lib/result_schema";
import NotFoundError from "../Middleware/error/NotFoundError";
import SchemaError from "../Middleware/error/SchemaError";
import {
  createInsufficientPermissionsError,
  DataType,
  generateInvalidBodyError,
  NAME_ERROR,
  validateName,
} from "./common";

const roleSchema = {
  name: true,
  schema: true,
  discipline: { select: { pid: true, name: true } },
  visual: { select: { pid: true, location: true } },
} as const;

export const _getAllRoleSchemas = async (res: Response, disciplinePid: string | undefined) => {
  const schemas = await prisma.roleSchema.findMany({
    where: { discipline: { pid: disciplinePid } },
    select: roleSchema,
  });

  return res.status(200).json({
    type: "success",
    payload: {
      roleSchemas: schemas,
    },
  });
};

interface GetAllRoleSchemasSearchParams {
  disciplinePid?: string;
}

export const getAllRoleSchemas = async (req: Request<{}, {}, {}, GetAllRoleSchemasSearchParams>, res: Response) => {
  return _getAllRoleSchemas(res, req.query.disciplinePid);
};

interface GetAllRoleSchemasWithParamQueryParams {
  organisationPid: string;
}

export const getAllRoleSchemasWithParam = async (
  req: Request<GetAllRoleSchemasWithParamQueryParams>,
  res: Response
) => {
  return _getAllRoleSchemas(res, req.params.organisationPid);
};

interface GetRoleSchemaQueryParams {
  pid: string;
}

export const getRoleSchema = async (req: Request<GetRoleSchemaQueryParams>, res: Response) => {
  const { pid } = req.params;

  const schema = await prisma.roleSchema.findUnique({ where: { pid }, select: roleSchema });

  if (!schema) {
    throw new NotFoundError("roleSchema", pid);
  }

  return res.status(200).json({
    type: "success",
    payload: {
      roleSchema: {
        ...schema,
        discipline: {
          ...schema.discipline,
          _links: [{ rel: "self", type: "GET", href: `/api/disciplines/${schema.discipline.pid}` }],
        },
      },
    },
  });
};

interface CreateRoleSchemaBody {
  name?: string;
  schema?: any;
}

// at: POST /discipline/:disciplinePid/role-schemas
// requires: auth(ELEVATED)
export const createRoleSchema = async (
  req: Request<{ disciplinePid: string }, {}, CreateRoleSchemaBody>,
  res: Response
) => {
  if (req.auth?.permission_level !== "ELEVATED") {
    return res.status(403).json(createInsufficientPermissionsError());
  }

  const { name, schema: resultSchema } = req.body;

  if (typeof name !== "string") {
    return res.status(400).json(generateInvalidBodyError({ name: DataType.STRING, schema: DataType.RESULT_SCHEMA }));
  }

  if (!validateName(name)) {
    return res.status(400).json(NAME_ERROR);
  }

  // Validate the result schema (Errors should be handled by the default error handler)
  const validatedSchema = parseSchema(resultSchema);

  try {
    const schema = await prisma.roleSchema.create({
      data: { name, schema: validatedSchema, discipline: { connect: { pid: req.params.disciplinePid } } },
      select: roleSchema,
    });

    return res.status(201).json({ type: "success", payload: { roleSchema: schema } });
  } catch (e) {
    if (e instanceof PrismaClientKnownRequestError && e.code === "P2025") {
      throw new NotFoundError("discipline", req.params.disciplinePid);
    }

    throw e;
  }
};