const mongoose = require("mongoose")
const router = require('express').Router()
const { MasterModel } = require('./model/master')
const { OrderModel } = require('./model/order')
const { orderStatus } = require('./model/const')

const isValidPhoneNumber = (value) => /^(\+)?\d{9,15}/.test(value)
const isValidCarNumber = (value) => /^[авекмнорстух][0-9]{3}[авекмнорстух]{2}[0-9]{2,3}$/i.test(value)
const isValidCarBodyType = (value) => typeof value === 'number' && value > 0 && value < 100
const isValidCarColor = (value) => value.length < 50 && /^[#a-z0-9а-я-\s,.()]+$/i.test(value)
const isValidISODate = (value) => /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:.\d{1,3})?Z$/.test(value)

const latitudeRe = /^(-?[1-8]?\d(?:\.\d{1,18})?|90(?:\.0{1,18})?)$/
const longitudeRe = /^(-?(?:1[0-7]|[1-9])?\d(?:\.\d{1,18})?|180(?:\.0{1,18})?)$/
const addressRe = /^[а-я0-9\s,.'-/()]*$/i
const isValidLocation = (value) => {
    if (value.length > 200) {
        return false
    }

    const [coordinates, address] = value.split(' ')
    const [latitude, longitude] = coordinates.split(',')
    return latitudeRe.test(latitude) && longitudeRe.test(longitude) && addressRe.test(address)
}

const isValidOrderStatus = (value) => Object.values(orderStatus).includes(value)
const isValidOrderNotes = (value) => value.length < 500

const VALIDATION_MESSAGES = {
    order: {
        notFound: 'Order not found'
    },
    orderId: {
        invalid: 'Valid order ID is required',
    },
    orderStatus: {
        invalid: 'Invalid order status'
    },
    orderNotes: {
        invalid: 'Invalid order notes'
    },
    master: {
        notFound: 'Master not found'
    },
    masterId: {
        invalid: 'Invalid master ID',
    },
    phoneNumber: {
        required: 'Phone number is required',
        invalid: 'Invalid phone number'
    },
    carNumber: {
        required: 'Car number is required',
        invalid: 'Invalid car number'
    },
    carBody: {
        required: 'Car body type is required',
        invalid: 'Invalid car body type'
    },
    carColor: {
        invalid: 'Invalid car color'
    },
    washingBegin: {
        required: 'Begin time of washing is required',
        invalid: 'Invalid begin time of washing'
    },
    washingEnd: {
        required: 'End time of washing is required',
        invalid: 'Invalid end time of washing'
    },
    washingLocation: {
        required: 'Location of washing is required',
        invalid: 'Invalid location of washing'
    },
}

const createOrder = async (req, res) => {
    const bodyErrors = []

    const { customer } = req.body
    if (!customer.phone) {
        bodyErrors.push(VALIDATION_MESSAGES.phoneNumber.required)
    } else if (!isValidPhoneNumber(customer.phone)) {
        bodyErrors.push(VALIDATION_MESSAGES.phoneNumber.invalid)
    }

    const { car } = req.body
    if (!car.number) {
        bodyErrors.push(VALIDATION_MESSAGES.carNumber.required)
    } else if (!isValidCarNumber(car.number)) {
        bodyErrors.push(VALIDATION_MESSAGES.carNumber.invalid)
    }
    if (!car.body) {
        bodyErrors.push(VALIDATION_MESSAGES.carBody.required)
    } else if (!isValidCarBodyType(car.body)) {
        bodyErrors.push(VALIDATION_MESSAGES.carBody.invalid)
    }
    if (!isValidCarColor(car.color)) {
        bodyErrors.push(VALIDATION_MESSAGES.carColor.invalid)
    }

    const { washing } = req.body
    if (!washing.begin) {
        bodyErrors.push(VALIDATION_MESSAGES.washingBegin.required)
    } else if (!isValidISODate(washing.begin)) {
        bodyErrors.push(VALIDATION_MESSAGES.washingBegin.invalid)
    }
    if (!washing.end) {
        bodyErrors.push(VALIDATION_MESSAGES.washingEnd.required)
    } else if (!isValidISODate(washing.end)) {
        bodyErrors.push(VALIDATION_MESSAGES.washingEnd.invalid)
    }
    if (!washing.location) {
        bodyErrors.push(VALIDATION_MESSAGES.washingLocation.required)
    } else if (!isValidLocation(washing.location)) {
        bodyErrors.push(VALIDATION_MESSAGES.washingLocation.invalid)
    }

    if (bodyErrors.length > 0) {
        throw new Error(bodyErrors.join(', '))
    }

    const order = await OrderModel.create({
        phone: customer.phone,
        carNumber: car.number,
        carBody: car.body,
        carColor: car.color,
        startWashTime: washing.begin,
        endWashTime: washing.end,
        location: washing.location,
        status: orderStatus.PROGRESS,
        notes: '',
        created: new Date().toISOString(),
    })

    res.status(200).send({ success: true, body: order })
}

const getOrder = async (req, res) => {
    const { id } = req.params
    if (!mongoose.Types.ObjectId.isValid(id)) {
        throw new Error(VALIDATION_MESSAGES.orderId.invalid)
    }

    const order = await OrderModel.findById(id)
    if (!order) {
        throw new Error(VALIDATION_MESSAGES.order.notFound)
    }

    res.status(200).send({ success: true, body: order })
}

const updateOrder = async (req, res) => {
    const { id } = req.params
    if (!mongoose.Types.ObjectId.isValid(id)) {
        throw new Error(VALIDATION_MESSAGES.orderId.invalid)
    }

    const bodyErrors = []

    const { status } = req.body
    if (status) {
        if (!isValidOrderStatus(status)) {
            bodyErrors.push(VALIDATION_MESSAGES.orderStatus.invalid)
        }
    }

    const { master: masterId } = req.body
    if (masterId) {
        if (!mongoose.Types.ObjectId.isValid(masterId)) {
            bodyErrors.push(VALIDATION_MESSAGES.masterId.invalid)
        } else {
            const master = await MasterModel.findById(masterId)
            if (!master) {
                bodyErrors.push(VALIDATION_MESSAGES.master.notFound)
            }
        }
    }

    const { notes } = req.body
    if (notes) {
        if (!isValidOrderNotes(notes)) {
            bodyErrors.push(VALIDATION_MESSAGES.orderNotes.invalid)
        }
    }

    if (bodyErrors.length > 0) {
        throw new Error(bodyErrors.join(', '))
    }

    const updateData = {}
    if (status) {
        updateData.status = status
    }
    if (masterId) {
        updateData.master = masterId
    }
    if (notes) {
        updateData.notes = notes
    }
    updateData.updated = new Date().toISOString()

    const order = await OrderModel.findByIdAndUpdate(
        id,
        updateData,
        { new: true }
    )
    if (!order) {
        throw new Error(VALIDATION_MESSAGES.order.notFound)
    }

    res.status(200).send({ success: true, body: order })
}

const deleteOrder = async (req, res) => {
    const { id } = req.params
    if (!mongoose.Types.ObjectId.isValid(id)) {
        throw new Error(VALIDATION_MESSAGES.orderId.invalid)
    }

    const order = await OrderModel.findByIdAndDelete(id, {
        new: true,
    })
    if (!order) {
        throw new Error(VALIDATION_MESSAGES.order.notFound)
    }
    res.status(200).send({ success: true, body: order })
}

router.post('/create', createOrder)
router.get('/:id', getOrder)
router.patch('/:id', updateOrder)
router.delete('/:id', deleteOrder)

module.exports = router