"use client"

import { AppSidebar } from "@/components/app-sidebar"
import { SiteHeader } from "@/components/site-header"
import { SidebarInset, SidebarProvider } from "@/components/ui/sidebar"
import { useEffect, useState } from "react"
import { useTranslation } from "react-i18next"
import { DataTableSimple } from "@/components/data-table-simple"
import { ColumnDef, VisibilityState } from "@tanstack/react-table"
import { Badge } from "@/components/ui/badge"
import { IconSearch, IconPlus, IconEye } from "@tabler/icons-react"
import { Input } from "@/components/ui/input"
import { useRouter } from "next/navigation"
import { Button } from "@/components/ui/button"
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select"
import {
  DropdownMenu,
  DropdownMenuCheckboxItem,
  DropdownMenuContent,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu"

type PriceCalculation = {
  id: number
  type: "price" | "cd" | "matif"
  date: string
  contract: {
    number: string
    supplier: { name: string }
    buyer: { name: string }
    product: string
  }
  totalValue: number
  totalValueRON: number
  currency: string
  vatAmount: number
  vatAmountRON: number
}

export default function PriceCalculationPage() {
  const router = useRouter()
  const [calculations, setCalculations] = useState<PriceCalculation[]>([])
  const [columnVisibility, setColumnVisibility] = useState<VisibilityState>({})
  const [search, setSearch] = useState("")
  const [selectedCompany, setSelectedCompany] = useState<string>("all")
  const { t } = useTranslation()

  useEffect(() => {
    // Fetch price calculations
    fetch("/api/price-calculations")
      .then(res => res.json())
      .then(data => {
        console.log("Received calculations:", data)
        setCalculations(data)
      })
      .catch(error => {
        console.error("Error fetching calculations:", error)
      })
  }, [])

  // Get unique companies for filter
  const companies = [...new Set(calculations.map(c => c.contract.supplier.name).filter(Boolean))]

  // Filter calculations based on search and filters
  const filteredCalculations = calculations.filter(calculation => {
    const matchesSearch = 
      calculation.contract.number.toLowerCase().includes(search.toLowerCase()) ||
      calculation.contract.supplier.name.toLowerCase().includes(search.toLowerCase()) ||
      calculation.contract.buyer.name.toLowerCase().includes(search.toLowerCase())
    
    const matchesCompany = selectedCompany === "all" || calculation.contract.supplier.name === selectedCompany

    return matchesSearch && matchesCompany
  })

  const columns: ColumnDef<PriceCalculation>[] = [
    {
      accessorKey: "contract.number",
      header: "Contract Number",
    },
    {
      accessorKey: "contract.supplier.name",
      header: "Supplier",
    },
    {
      accessorKey: "contract.buyer.name",
      header: "Buyer",
    },
    {
      accessorKey: "contract.product",
      header: "Product",
    },
    {
      accessorKey: "type",
      header: "Type",
      cell: ({ row }) => {
        const type = row.original.type
        return (
          <Badge variant="outline">
            {type === "price" ? "Price" : type === "cd" ? "CD" : "Matif"}
          </Badge>
        )
      },
    },
    {
      accessorKey: "date",
      header: "Date",
      cell: ({ row }) => new Date(row.original.date).toLocaleDateString(),
    },
    {
      accessorKey: "totalValue",
      header: "Total Value",
      cell: ({ row }) => {
        const value = row.original.totalValue
        const currency = row.original.currency
        return `${value.toFixed(2)} ${currency}`
      },
    },
    {
      accessorKey: "totalValueRON",
      header: "Total Value (RON)",
      cell: ({ row }) => `${row.original.totalValueRON.toFixed(2)} RON`,
    },
    {
      accessorKey: "vatAmount",
      header: "VAT",
      cell: ({ row }) => {
        const value = row.original.vatAmount
        const currency = row.original.currency
        return `${value.toFixed(2)} ${currency}`
      },
    },
    {
      id: "actions",
      header: "Actions",
      cell: ({ row }) => {
        return (
          <Button
            variant="ghost"
            size="icon"
            onClick={() => router.push(`/execution-operations/pricecalculation/${row.original.id}`)}
          >
            <IconEye className="h-4 w-4" />
          </Button>
        )
      },
    },
  ]

  return (
    <SidebarProvider
      style={{
        "--sidebar-width": "calc(var(--spacing) * 72)",
        "--header-height": "calc(var(--spacing) * 12)",
      } as React.CSSProperties}
    >
      <AppSidebar variant="inset" />
      <SidebarInset>
        <SiteHeader />
        <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">
                <h2 className="text-2xl font-bold">{t("priceCalculation.title")}</h2>
                <div className="flex items-center gap-2">
                  <Button onClick={() => router.push("/execution-operations/pricecalculation/new")}>
                    <IconPlus className="h-4 w-4 mr-2" />
                    New Calculation
                  </Button>
                  <DropdownMenu>
                    <DropdownMenuTrigger asChild>
                      <Button variant="outline">
                        Columns
                      </Button>
                    </DropdownMenuTrigger>
                    <DropdownMenuContent align="end" className="w-[150px]">
                      {columns.map((column) => {
                        const columnId = typeof column.id === 'string' ? column.id : 
                          'accessorKey' in column ? column.accessorKey as string : null;
                        if (!columnId) return null;
                        return (
                          <DropdownMenuCheckboxItem
                            key={columnId}
                            checked={columnVisibility[columnId]}
                            onCheckedChange={(value) =>
                              setColumnVisibility((prev) => ({
                                ...prev,
                                [columnId]: value,
                              }))
                            }
                          >
                            {column.header?.toString()}
                          </DropdownMenuCheckboxItem>
                        );
                      })}
                    </DropdownMenuContent>
                  </DropdownMenu>
                </div>
              </div>
              <div className="px-4 lg:px-6 flex gap-4 items-center">
                <div className="flex-1 relative">
                  <IconSearch className="absolute left-2 top-2.5 h-4 w-4 text-muted-foreground" />
                  <Input
                    placeholder="Search calculations..."
                    value={search}
                    onChange={(e) => setSearch(e.target.value)}
                    className="pl-8"
                  />
                </div>
                <Select value={selectedCompany} onValueChange={setSelectedCompany}>
                  <SelectTrigger className="w-[180px]">
                    <SelectValue placeholder="Select company" />
                  </SelectTrigger>
                  <SelectContent>
                    <SelectItem value="all">All Companies</SelectItem>
                    {companies.map(company => (
                      <SelectItem key={company} value={company}>
                        {company}
                      </SelectItem>
                    ))}
                  </SelectContent>
                </Select>
              </div>
              <div className="px-4 lg:px-6">
                {calculations.length === 0 ? (
                  <div className="text-center py-4">No calculations found</div>
                ) : (
                  <DataTableSimple 
                    data={filteredCalculations} 
                    columns={columns}
                    columnVisibility={columnVisibility}
                    onColumnVisibilityChange={setColumnVisibility}
                  />
                )}
              </div>
            </div>
          </div>
        </div>
      </SidebarInset>
    </SidebarProvider>
  )
}