"use client"

import { useState, useEffect } from "react"
import { useTranslation } from "react-i18next"
import { useRouter } from "next/navigation"
import { AppSidebar } from "@/components/app-sidebar"
import { SiteHeader } from "@/components/site-header"
import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar"
import { Button } from "@/components/ui/button"
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card"
import { Input } from "@/components/ui/input"
import { Label } from "@/components/ui/label"
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
import { Textarea } from "@/components/ui/textarea"
import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/draft-dialog"
import { Combobox } from "@/components/combobox"

type AddendumType = 
  | "ADD_RO"
  | "ADD_ENG"
  | "ADD_BLINGV"
  | "ADD_EUROCONSULT_ENG"
  | "ADD_MAGIC_ENG"
  | "ADD_SMART_RO"
  | "ADD_SMART_ENG"
  | "ADD_GGI_RO"
  | "ADD_GGI_ENG"
  | "ADD_ANDERSONS_RO"
  | "ADD_ROFERSPED_RO"
  | "ADD_GOZURI_GGI_RO"

interface AddendumFormData {
  addendumNumber: string
  contractNumber: string
  company: string
  status: string
  type: AddendumType | null
  validUntil: string
  signedBy: string
  changes: string
}

export default function NewAddendumPage() {
  const [showTypeDialog, setShowTypeDialog] = useState(true)
  const [formData, setFormData] = useState<AddendumFormData>({
    addendumNumber: "",
    contractNumber: "",
    company: "",
    status: "Pending",
    type: null,
    validUntil: "",
    signedBy: "",
    changes: ""
  })

  const [isTypeSelectorOpen, setIsTypeSelectorOpen] = useState(true)
  const [companyOptions, setCompanyOptions] = useState<{ value: string; label: string }[]>([])

  const { t } = useTranslation()
  const router = useRouter()

  useEffect(() => {
    // Fetch options for companies, goods, and payment terms
    fetch('/contracts/api/addendums')
      .then(res => res.json())
      .then(data => {
        const companiesSet = new Set<string>(data.map((item: AddendumFormData) => item.company))

        setCompanyOptions(Array.from(companiesSet).map(item => ({ value: item, label: item })))
      })
  }, [])

  const handleInputChange = (field: keyof AddendumFormData, value: string | AddendumType) => {
    setFormData(prev => ({
      ...prev,
      [field]: value
    }))
  }

  const handleSubmit = async () => {
    if (!formData.type) return

    try {
      const response = await fetch("/contracts/api/addendums", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify({
          ...formData,
          createdDate: new Date().toISOString(),
        }),
      })

      if (response.ok) {
        router.push("/contracts/addendum")
      }
    } catch (error) {
      console.error("Error creating addendum:", error)
    }
  }

  const addendumTypes: AddendumType[] = [
     "ADD_RO",
     "ADD_ENG",
     "ADD_BLINGV",
     "ADD_EUROCONSULT_ENG",
     "ADD_MAGIC_ENG",
     "ADD_SMART_RO",
     "ADD_SMART_ENG",
     "ADD_GGI_RO",
     "ADD_GGI_ENG",
     "ADD_ANDERSONS_RO",
     "ADD_ROFERSPED_RO",
     "ADD_GOZURI_GGI_RO"
  ]

  const handleTypeSelect = (type: AddendumType) => {
    handleInputChange('type', type)
    const randomNum = Math.floor(1000 + Math.random() * 9000) // Generate a random 4-digit number
    const addendumNumber = `${type.slice(0, 2)}${randomNum}` // Combine first 2 letters of type with random number
    handleInputChange('addendumNumber', addendumNumber) // Set the draft number
    setIsTypeSelectorOpen(false) // Close the dialog
  }

  return (
    <SidebarProvider
      style={{
        "--sidebar-width": "calc(var(--spacing) * 72)",
        "--header-height": "calc(var(--spacing) * 12)",
      } as React.CSSProperties}
    >
      <AppSidebar variant="inset" />
      <SidebarInset>
        <SiteHeader title={t("addendum.newaddendum")}/>
        <div className="flex flex-1 flex-col">
          <div className="@container/main flex flex-1 flex-col gap-2">
            <div className="flex flex-col gap-4 py-4 md:gap-6 md:py-6">
              <div className="flex justify-between items-center px-4 lg:px-6">
                <div className="flex items-center justify-between gap-4">
                  <h2 className="text-2xl font-bold">{t("addendum.newaddendum")}</h2>      
                </div>
                <Button variant="outline" onClick={() => router.back()}>
                    {t("addendum.back")}
                  </Button>
              </div>

              <Dialog open={isTypeSelectorOpen} onOpenChange={setIsTypeSelectorOpen}>
                <DialogContent className="max-w-4xl">
                  <DialogHeader>
                    <DialogTitle>{t("drafts.selecttype")}</DialogTitle>
                  </DialogHeader>
                  <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
                    {addendumTypes.map((type) => (
                      <Card
                        key={type}
                        className="cursor-pointer hover:bg-accent transition-colors"
                        onClick={() => handleTypeSelect(type)}
                      >
                        <CardHeader>
                          <CardTitle className="text-lg">{t(`drafts.types.${type}`)}</CardTitle>
                        </CardHeader>
                      </Card>
                    ))}
                  </div>
                </DialogContent>
              </Dialog>

              <div className="px-4 lg:px-6">
                  <div className="grid grid-cols-1 md:grid-cols-2 gap-4">
                    <Card>
                      <CardHeader>
                        <CardTitle>{t("addendum.basicinfo")}</CardTitle>
                      </CardHeader>
                      <CardContent className="space-y-4">
                        <div className="space-y-2">
                          <Label htmlFor="addendumNumber">{t("addendum.addendumnumber")}</Label>
                          <Input
                            id="addendumNumber"
                            value={formData.addendumNumber}
                            onChange={(e) => handleInputChange('addendumNumber', e.target.value)}
                          />
                        </div>
                        <div className="space-y-2">
                          <Label htmlFor="contractNumber">{t("addendum.contractnumber")}</Label>
                          <Input
                            id="contractNumber"
                            value={formData.contractNumber}
                            onChange={(e) => handleInputChange('contractNumber', e.target.value)}
                          />
                        </div>
                        <div className="space-y-2">
                          <Label htmlFor="company">{t("addendum.company")}</Label>
                          <Combobox
                            items={companyOptions}
                            value={formData.company}
                            onValueChange={(value) => handleInputChange('company', value)}
                            placeholder="Select company"
                            emptyText="No companies found"
                          />
                        </div>
                        <div className="space-y-2">
                        <Label htmlFor="type">{t("addendum.type")}</Label>
                        <Button
                          variant="outline"
                          className="w-full justify-start"
                          onClick={() => setIsTypeSelectorOpen(true)}
                        >
                          {t(`addendum.types.${formData.type}`)}
                        </Button>
                      </div>
                      </CardContent>
                    </Card>

                    <Card>
                      <CardHeader>
                        <CardTitle>{t("addendum.dates")}</CardTitle>
                      </CardHeader>
                      <CardContent className="space-y-4">
                        <div className="space-y-2">
                          <Label htmlFor="validUntil">{t("addendum.validuntil")}</Label>
                          <Input
                            id="validUntil"
                            type="date"
                            value={formData.validUntil}
                            onChange={(e) => handleInputChange('validUntil', e.target.value)}
                          />
                        </div>
                        <div className="space-y-2">
                          <Label htmlFor="signedBy">{t("addendum.signedby")}</Label>
                          <Input
                            id="signedBy"
                            value={formData.signedBy}
                            onChange={(e) => handleInputChange('signedBy', e.target.value)}
                          />
                        </div>
                      </CardContent>
                    </Card>

                    <Card className="md:col-span-2">
                      <CardHeader>
                        <CardTitle>{t("addendum.changesinfo")}</CardTitle>
                      </CardHeader>
                      <CardContent>
                        <Textarea
                          value={formData.changes}
                          onChange={(e) => handleInputChange('changes', e.target.value)}
                          className="min-h-[200px]"
                        />
                      </CardContent>
                    </Card>

                    <div className="md:col-span-2 flex justify-end">
                      <Button onClick={handleSubmit}>{t("addendum.create")}</Button>
                    </div>
                  </div>
                
              </div>
            </div>
          </div>
        </div>
      </SidebarInset>
    </SidebarProvider>
  )
}