"use client"

import { useEffect, useState } 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 Addendum {
  id: number
  addendumNumber: string
  contractNumber: string
  company: string
  status: string
  type: AddendumType
  createdDate: string
  validUntil: string
  signedBy: string
  changes: string
}

export default function AddendumDetailPage({ params }: { params: { id: string } }) {
  const [addendum, setAddendum] = useState<Addendum | null>(null)
  const [isTypeSelectorOpen, setIsTypeSelectorOpen] = useState(false)
  const { t } = useTranslation()
  const router = useRouter()
  const [goodsOptions, setGoodsOptions] = useState<{ value: string; label: string }[]>([])
  const [companyOptions, setCompanyOptions] = useState<{ value: string; label: string }[]>([])
  const [paymentTermsOptions, setPaymentTermsOptions] = useState<{ value: string; label: string }[]>([])

  useEffect(() => {
    fetch(`/contracts/api/addendums`)
      .then(res => res.json())
      .then(data => {
        const foundAddendum = data.find((a: Addendum) => a.id === parseInt(params.id))
        if (foundAddendum) {
          setAddendum(foundAddendum)
        }

        const companiesSet = new Set<string>(data.map((item: Addendum) => item.company))

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

  const handleChange = (field: keyof Addendum, value: Addendum[keyof Addendum]) => {
    if (addendum) {
      setAddendum(prev => ({
        ...prev!,
        [field]: value
      }))
    }
  }

  const handleSave = async () => {
    if (!addendum) return

    try {
      const response = await fetch(`/contracts/api/addendums`, {
        method: "PUT",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify(addendum),
      })

      if (response.ok) {
        router.push("/contracts/addendum")
      }
    } catch (error) {
      console.error('Error updating 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"
  ]

  if (!addendum) {
    return <div>Loading...</div>
  }

  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.details")}/>
        <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 gap-4">
                  <h2 className="text-2xl font-bold">{t("addendum.details")}</h2>
                </div>
                <div className="flex gap-2">
                  <Button variant="outline" onClick={() => router.back()}>
                    {t("addendum.back")}
                  </Button>
                  <Button onClick={handleSave}>
                    {t("addendum.save")}
                  </Button>
                </div>
              </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={() => {
                          handleChange('type', type)
                          setIsTypeSelectorOpen(false)
                        }}
                      >
                        <CardHeader>
                          <CardTitle className="text-lg">{t(`addendum.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>{t("addendum.addendumnumber")}</Label>
                        <Input
                          value={addendum.addendumNumber}
                          onChange={(e) => setAddendum({ ...addendum, addendumNumber: e.target.value })}
                        />
                      </div>
                      <div className="space-y-2">
                        <Label>{t("addendum.contractnumber")}</Label>
                        <Input
                          value={addendum.contractNumber}
                          onChange={(e) => setAddendum({ ...addendum, contractNumber: e.target.value })}
                        />
                      </div>
                      <div className="space-y-2">
                        <Label>{t("addendum.company")}</Label>
                        <Combobox
                          items={companyOptions}
                          value={addendum.company}
                          onValueChange={(value) => handleChange('company', value)}
                        />
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="status">{t("drafts.status")}</Label>
                        <Select
                          value={addendum.status}
                          onValueChange={(value) => handleChange('status', value)}
                        >
                          <SelectTrigger>
                            <SelectValue />
                          </SelectTrigger>
                          <SelectContent>
                            <SelectItem value="Active">{t("drafts.statusLabels.active")}</SelectItem>
                            <SelectItem value="In Progress">{t("drafts.statusLabels.inprogress")}</SelectItem>
                            <SelectItem value="Under Review">{t("drafts.statusLabels.underreview")}</SelectItem>
                            <SelectItem value="Pending Approval">{t("drafts.statusLabels.pendingapproval")}</SelectItem>
                          </SelectContent>
                        </Select>
                      </div>
                      <div className="space-y-2">
                        <Label htmlFor="type">{t("drafts.type")}</Label>
                        <Button
                          variant="outline"
                          className="w-full justify-start"
                          onClick={() => setIsTypeSelectorOpen(true)}
                        >
                          {t(`drafts.types.${addendum.type}`)}
                        </Button>
                      </div>
                    </CardContent>
                  </Card>

                  <Card>
                    <CardHeader>
                      <CardTitle>{t("addendum.dates")}</CardTitle>
                    </CardHeader>
                    <CardContent className="space-y-4">
                      <div className="space-y-2">
                        <Label>{t("addendum.createddate")}</Label>
                        <p>{new Date(addendum.createdDate).toLocaleDateString()}</p>
                      </div>
                      <div className="space-y-2">
                        <Label>{t("addendum.validuntil")}</Label>
                        <Input
                          type="date"
                          value={addendum.validUntil.split('T')[0]}
                          onChange={(e) => setAddendum({ ...addendum, validUntil: e.target.value })}
                        />
                      </div>
                      <div className="space-y-2">
                        <Label>{t("addendum.signedby")}</Label>
                        <Input
                          value={addendum.signedBy}
                          onChange={(e) => setAddendum({ ...addendum, signedBy: e.target.value })}
                        />
                      </div>
                    </CardContent>
                  </Card>

                  <Card className="md:col-span-2">
                    <CardHeader>
                      <CardTitle>{t("addendum.changesinfo")}</CardTitle>
                    </CardHeader>
                    <CardContent>
                      <Textarea
                        value={addendum.changes}
                        onChange={(e) => setAddendum({ ...addendum, changes: e.target.value })}
                        className="min-h-[200px]"
                      />
                    </CardContent>
                  </Card>
                </div>
              </div>
            </div>
          </div>
        </div>
      </SidebarInset>
    </SidebarProvider>
  )
}