import { Prisma, Status, UserType } from "@prisma/client";
import {
  Body,
  Controller,
  Delete,
  Get,
  Put,
  Path,
  Post,
  Query,
  Request,
  Route,
  Security,
  Tags,
} from "tsoa";

import prisma from "../db";
import HttpError from "../interfaces/http-error";
import HttpStatus from "../interfaces/http-status";
import { RequestWithUser } from "../interfaces/user";
import minio from "../services/minio";

if (!process.env.MINIO_BUCKET) {
  throw Error("Require MinIO bucket.");
}

const MINIO_BUCKET = process.env.MINIO_BUCKET;

type BranchCreate = {
  status?: Status;
  taxNo: string;
  nameEN: string;
  name: string;
  addressEN: string;
  address: string;
  zipCode: string;
  email: string;
  contactName?: string | null;
  contact?: string | string[] | null;
  telephoneNo: string;
  lineId?: string | null;
  longitude: string;
  latitude: string;

  subDistrictId?: string | null;
  districtId?: string | null;
  provinceId?: string | null;
  headOfficeId?: string | null;
};

type BranchUpdate = {
  status?: "ACTIVE" | "INACTIVE";
  taxNo?: string;
  nameEN?: string;
  name?: string;
  addressEN?: string;
  address?: string;
  zipCode?: string;
  email?: string;
  telephoneNo?: string;
  contactName?: string;
  contact?: string | string[] | null;
  lineId?: string;
  longitude?: string;
  latitude?: string;

  subDistrictId?: string | null;
  districtId?: string | null;
  provinceId?: string | null;
  headOfficeId?: string | null;
};

function lineImageLoc(id: string) {
  return `branch/line-qr-${id}`;
}

function branchImageLoc(id: string) {
  return `branch/branch-img-${id}`;
}

@Route("api/v1/branch")
@Tags("Branch")
@Security("keycloak")
export class BranchController extends Controller {
  @Get("stats")
  async getStats() {
    const list = await prisma.branch.groupBy({
      _count: true,
      by: "isHeadOffice",
    });

    return list.reduce<Record<"hq" | "br", number>>(
      (a, c) => {
        a[c.isHeadOffice ? "hq" : "br"] = c._count;
        return a;
      },
      { hq: 0, br: 0 },
    );
  }

  @Get("user-stats")
  async getUserStat(@Query() userType?: UserType) {
    const list = await prisma.branchUser.groupBy({
      _count: true,
      where: { user: { userType } },
      by: "branchId",
    });

    const record = await prisma.branch.findMany({
      select: {
        id: true,
        headOfficeId: true,
        isHeadOffice: true,
        nameEN: true,
        name: true,
      },
      orderBy: [{ isHeadOffice: "desc" }, { createdAt: "asc" }],
    });

    const sort = record.reduce<(typeof record)[]>((acc, curr) => {
      for (const i of acc) {
        if (i[0].id === curr.headOfficeId) {
          i.push(curr);
          return acc;
        }
      }
      acc.push([curr]);
      return acc;
    }, []);

    return sort.flat().map((a) =>
      Object.assign(a, {
        count: list.find((b) => b.branchId === a.id)?._count ?? 0,
      }),
    );
  }

  @Get()
  async getBranch(
    @Query() zipCode?: string,
    @Query() filter?: "head" | "sub",
    @Query() headOfficeId?: string,
    @Query() tree?: boolean,
    @Query() query: string = "",
    @Query() page: number = 1,
    @Query() pageSize: number = 30,
  ) {
    const where = {
      AND: {
        headOfficeId: headOfficeId ?? (filter === "head" || tree ? null : undefined),
        NOT: { headOfficeId: filter === "sub" && !headOfficeId ? null : undefined },
      },
      OR: [
        { nameEN: { contains: query }, zipCode },
        { name: { contains: query }, zipCode },
        { email: { contains: query }, zipCode },
        { telephoneNo: { contains: query }, zipCode },
      ],
    } satisfies Prisma.BranchWhereInput;

    const [result, total] = await prisma.$transaction([
      prisma.branch.findMany({
        orderBy: { createdAt: "asc" },
        include: {
          province: true,
          district: true,
          subDistrict: true,
          contact: true,
          branch: tree && {
            include: {
              province: true,
              district: true,
              subDistrict: true,
            },
          },
        },
        where,
        take: pageSize,
        skip: (page - 1) * pageSize,
      }),
      prisma.branch.count({ where }),
    ]);

    return { result, page, pageSize, total };
  }

  @Get("{branchId}")
  async getBranchById(
    @Path() branchId: string,
    @Query() includeSubBranch?: boolean,
    @Query() includeContact?: boolean,
  ) {
    const record = await prisma.branch.findFirst({
      include: {
        province: true,
        district: true,
        subDistrict: true,
        branch: includeSubBranch && {
          include: {
            province: true,
            district: true,
            subDistrict: true,
          },
        },
        contact: includeContact,
      },
      where: { id: branchId },
    });

    if (!record) {
      throw new HttpError(HttpStatus.NOT_FOUND, "Branch cannot be found.", "branchNotFound");
    }

    return Object.assign(record, {
      imageUrl: await minio.presignedGetObject(MINIO_BUCKET, branchImageLoc(record.id)),
      qrCodeImageUrl: await minio.presignedGetObject(MINIO_BUCKET, lineImageLoc(record.id)),
    });
  }

  @Post()
  async createBranch(@Request() req: RequestWithUser, @Body() body: BranchCreate) {
    const [province, district, subDistrict, head] = await prisma.$transaction([
      prisma.province.findFirst({ where: { id: body.provinceId || undefined } }),
      prisma.district.findFirst({ where: { id: body.districtId || undefined } }),
      prisma.subDistrict.findFirst({ where: { id: body.subDistrictId || undefined } }),
      prisma.branch.findFirst({ where: { id: body.headOfficeId || undefined } }),
    ]);
    if (body.provinceId && !province)
      throw new HttpError(
        HttpStatus.BAD_REQUEST,
        "Province cannot be found.",
        "relationProvinceNotFound",
      );
    if (body.districtId && !district)
      throw new HttpError(
        HttpStatus.BAD_REQUEST,
        "District cannot be found.",
        "relationDistrictNotFound",
      );
    if (body.subDistrictId && !subDistrict)
      throw new HttpError(
        HttpStatus.BAD_REQUEST,
        "Sub-district cannot be found.",
        "relationSubDistrictNotFound",
      );
    if (body.headOfficeId && !head)
      throw new HttpError(
        HttpStatus.BAD_REQUEST,
        "Headquaters cannot be found.",
        "relationHQNotFound",
      );

    const { provinceId, districtId, subDistrictId, headOfficeId, contact, ...rest } = body;

    const year = new Date().getFullYear();

    const record = await prisma.$transaction(
      async (tx) => {
        const last = await tx.runningNo.upsert({
          where: {
            key: !headOfficeId ? `HQ${year.toString().slice(2)}` : `BR${head?.code.slice(2, 5)}`,
          },
          create: {
            key: !headOfficeId ? `HQ${year.toString().slice(2)}` : `BR${head?.code.slice(2, 5)}`,
            value: 1,
          },
          update: { value: { increment: 1 } },
        });

        const code = !headOfficeId
          ? `HQ${year.toString().slice(2)}${last.value}`
          : `BR${head?.code.slice(2, 5)}${last.value.toString().padStart(2, "0")}`;

        return await tx.branch.create({
          include: {
            province: true,
            district: true,
            subDistrict: true,
          },
          data: {
            ...rest,
            statusOrder: +(rest.status === "INACTIVE"),
            code,
            isHeadOffice: !headOfficeId,
            province: { connect: provinceId ? { id: provinceId } : undefined },
            district: { connect: districtId ? { id: districtId } : undefined },
            subDistrict: { connect: subDistrictId ? { id: subDistrictId } : undefined },
            headOffice: { connect: headOfficeId ? { id: headOfficeId } : undefined },
            createdBy: { connect: { id: req.user.sub } },
            updatedBy: { connect: { id: req.user.sub } },
          },
        });
      },
      { isolationLevel: Prisma.TransactionIsolationLevel.Serializable },
    );

    if (headOfficeId) {
      await prisma.branch.updateMany({
        where: { id: headOfficeId, status: Status.CREATED },
        data: { status: Status.ACTIVE },
      });
    }

    this.setStatus(HttpStatus.CREATED);

    if (record && contact) {
      await prisma.branchContact.createMany({
        data:
          typeof contact === "string"
            ? [{ telephoneNo: contact, branchId: record.id }]
            : contact.map((v) => ({ telephoneNo: v, branchId: record.id })),
      });
    }

    return Object.assign(record, {
      contact: await prisma.branchContact.findMany({ where: { branchId: record.id } }),
      imageUrl: await minio.presignedGetObject(MINIO_BUCKET, branchImageLoc(record.id)),
      imageUploadUrl: await minio.presignedPutObject(MINIO_BUCKET, branchImageLoc(record.id)),
      qrCodeImageUrl: await minio.presignedGetObject(
        MINIO_BUCKET,
        lineImageLoc(record.id),
        12 * 60 * 60,
      ),
      qrCodeImageUploadUrl: await minio.presignedPutObject(
        MINIO_BUCKET,
        lineImageLoc(record.id),
        12 * 60 * 60,
      ),
    });
  }

  @Put("{branchId}")
  async editBranch(
    @Request() req: RequestWithUser,
    @Body() body: BranchUpdate,
    @Path() branchId: string,
  ) {
    if (body.headOfficeId === branchId)
      throw new HttpError(
        HttpStatus.BAD_REQUEST,
        "Cannot make this as headquaters and branch at the same time.",
        "cantMakeHQAndBranchSameTime",
      );

    if (body.subDistrictId || body.districtId || body.provinceId || body.headOfficeId) {
      const [province, district, subDistrict, branch] = await prisma.$transaction([
        prisma.province.findFirst({ where: { id: body.provinceId || undefined } }),
        prisma.district.findFirst({ where: { id: body.districtId || undefined } }),
        prisma.subDistrict.findFirst({ where: { id: body.subDistrictId || undefined } }),
        prisma.branch.findFirst({ where: { id: body.headOfficeId || undefined } }),
      ]);
      if (body.provinceId && !province)
        throw new HttpError(
          HttpStatus.BAD_REQUEST,
          "Province cannot be found.",
          "relationProvinceNotFound",
        );
      if (body.districtId && !district)
        throw new HttpError(
          HttpStatus.BAD_REQUEST,
          "District cannot be found.",
          "relationDistrictNotFound",
        );
      if (body.subDistrictId && !subDistrict)
        throw new HttpError(
          HttpStatus.BAD_REQUEST,
          "Sub-district cannot be found.",
          "relationSubDistrictNotFound",
        );
      if (body.headOfficeId && !branch)
        throw new HttpError(
          HttpStatus.BAD_REQUEST,
          "Headquaters cannot be found.",
          "relationHQNotFound",
        );
    }

    const { provinceId, districtId, subDistrictId, headOfficeId, contact, ...rest } = body;

    if (!(await prisma.branch.findUnique({ where: { id: branchId } }))) {
      throw new HttpError(HttpStatus.NOT_FOUND, "Branch cannot be found.", "branchNotFound");
    }

    const record = await prisma.branch.update({
      include: { province: true, district: true, subDistrict: true },
      data: {
        ...rest,
        statusOrder: +(rest.status === "INACTIVE"),
        isHeadOffice: headOfficeId !== undefined ? headOfficeId === null : undefined,
        province: {
          connect: provinceId ? { id: provinceId } : undefined,
          disconnect: provinceId === null || undefined,
        },
        district: {
          connect: districtId ? { id: districtId } : undefined,
          disconnect: districtId === null || undefined,
        },
        subDistrict: {
          connect: subDistrictId ? { id: subDistrictId } : undefined,
          disconnect: subDistrictId === null || undefined,
        },
        headOffice: {
          connect: headOfficeId ? { id: headOfficeId } : undefined,
          disconnect: headOfficeId === null || undefined,
        },
        updatedBy: { connect: { id: req.user.sub } },
      },
      where: { id: branchId },
    });

    if (record && contact !== undefined) {
      await prisma.branchContact.deleteMany({ where: { branchId } });
      contact &&
        (await prisma.branchContact.createMany({
          data:
            typeof contact === "string"
              ? [{ telephoneNo: contact, branchId }]
              : contact.map((v) => ({ telephoneNo: v, branchId })),
        }));
    }

    return Object.assign(record, {
      imageUrl: await minio.presignedGetObject(MINIO_BUCKET, branchImageLoc(record.id)),
      imageUploadUrl: await minio.presignedPutObject(MINIO_BUCKET, branchImageLoc(record.id)),
      qrCodeImageUrl: await minio.presignedGetObject(
        MINIO_BUCKET,
        lineImageLoc(record.id),
        12 * 60 * 60,
      ),
      qrCodeImageUploadUrl: await minio.presignedPutObject(
        MINIO_BUCKET,
        lineImageLoc(record.id),
        12 * 60 * 60,
      ),
    });
  }

  @Delete("{branchId}")
  async deleteBranch(@Path() branchId: string) {
    const record = await prisma.branch.findFirst({
      include: {
        province: true,
        district: true,
        subDistrict: true,
      },
      where: { id: branchId },
    });

    if (!record) {
      throw new HttpError(HttpStatus.NOT_FOUND, "Branch cannot be found.", "branchNotFound");
    }

    if (record.status !== Status.CREATED) {
      throw new HttpError(HttpStatus.FORBIDDEN, "Branch is in used.", "branchInUsed");
    }

    await minio.removeObject(MINIO_BUCKET, lineImageLoc(branchId), {
      forceDelete: true,
    });
    await minio.removeObject(MINIO_BUCKET, branchImageLoc(branchId), {
      forceDelete: true,
    });

    return await prisma.branch.delete({
      include: {
        province: true,
        district: true,
        subDistrict: true,
      },
      where: { id: branchId },
    });
  }
}