"use client";

import { useState } from "react";
import { useForm } from "react-hook-form";
import { z } from "zod";
import { zodResolver } from "@hookform/resolvers/zod";
import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { toast } from "sonner";
import { Plus, Pencil, Archive, Star } from "lucide-react";
import { accountingApi, type Currency } from "@/lib/accounting-api";
import { useTenantId } from "@/hooks/useTenantId";
import {
  PageHeader,
  Button,
  Dialog,
  ConfirmDialog,
  Input,
  Label,
  FieldError,
  DataTable,
  EmptyState,
  LoadingState,
  ErrorState,
  Badge,
  Drawer,
  Checkbox,
} from "@/components/ds";

const createSchema = z.object({
  code: z.string().length(3, "کد ارز ۳ حرفی است"),
  name: z.string().min(1, "نام الزامی است"),
  symbol: z.string().optional(),
  is_base: z.boolean().optional(),
});

const editSchema = z.object({
  name: z.string().min(1, "نام الزامی است"),
  symbol: z.string().optional(),
});

export default function CurrenciesPage() {
  const { tenantId } = useTenantId();
  const qc = useQueryClient();
  const [createOpen, setCreateOpen] = useState(false);
  const [selected, setSelected] = useState<Currency | null>(null);
  const [archiveId, setArchiveId] = useState<string | null>(null);

  const createForm = useForm<z.infer<typeof createSchema>>({
    resolver: zodResolver(createSchema),
    defaultValues: { code: "IRR", name: "ریال", symbol: "﷼", is_base: false },
  });
  const editForm = useForm<z.infer<typeof editSchema>>({
    resolver: zodResolver(editSchema),
  });

  const listQ = useQuery({
    queryKey: ["accounting", tenantId, "currencies"],
    queryFn: () => accountingApi.currencies.list(tenantId!),
    enabled: !!tenantId,
  });

  const invalidate = async () => {
    await qc.invalidateQueries({ queryKey: ["accounting", tenantId, "currencies"] });
  };

  const createM = useMutation({
    mutationFn: (d: z.infer<typeof createSchema>) => accountingApi.currencies.create(tenantId!, d),
    onSuccess: async () => {
      toast.success("ارز ایجاد شد");
      setCreateOpen(false);
      createForm.reset({ code: "", name: "", symbol: "", is_base: false });
      await invalidate();
    },
    onError: (e: Error) => toast.error(e.message),
  });

  const updateM = useMutation({
    mutationFn: (d: z.infer<typeof editSchema>) =>
      accountingApi.currencies.update(tenantId!, selected!.id, d),
    onSuccess: async () => {
      toast.success("ارز به‌روز شد");
      setSelected(null);
      await invalidate();
    },
    onError: (e: Error) => toast.error(e.message),
  });

  const setBaseM = useMutation({
    mutationFn: (id: string) => accountingApi.currencies.setBase(tenantId!, id),
    onSuccess: async () => {
      toast.success("ارز پایه تنظیم شد");
      await invalidate();
    },
    onError: (e: Error) => toast.error(e.message),
  });

  const archiveM = useMutation({
    mutationFn: (id: string) => accountingApi.currencies.archive(tenantId!, id),
    onSuccess: async () => {
      toast.success("ارز آرشیو شد");
      setArchiveId(null);
      await invalidate();
    },
    onError: (e: Error) => toast.error(e.message),
  });

  if (!tenantId || listQ.isLoading) return <LoadingState />;
  if (listQ.error) return <ErrorState message={listQ.error.message} onRetry={() => listQ.refetch()} />;

  return (
    <div>
      <PageHeader
        title="ارزها"
        description="مدیریت ارزهای فعال، ارز پایه و آرشیو."
        actions={
          <Button onClick={() => setCreateOpen(true)}>
            <Plus className="h-4 w-4" />
            ارز جدید
          </Button>
        }
      />

      <DataTable
        columns={[
          { key: "code", header: "کد" },
          { key: "name", header: "نام" },
          { key: "symbol", header: "نماد" },
          {
            key: "is_base",
            header: "پایه",
            render: (r) => (r.is_base ? <Badge tone="primary">پایه</Badge> : "—"),
          },
          {
            key: "is_active",
            header: "فعال",
            render: (r) =>
              r.is_active ? <Badge tone="success">فعال</Badge> : <Badge tone="default">آرشیو</Badge>,
          },
          {
            key: "actions",
            header: "عملیات",
            render: (r) => {
              const id = String(r.id);
              const active = Boolean(r.is_active);
              const isBase = Boolean(r.is_base);
              return (
                <div className="flex flex-wrap gap-1">
                  <Button
                    type="button"
                    size="sm"
                    variant="outline"
                    onClick={() => {
                      const c = listQ.data?.find((x) => x.id === id);
                      if (c) {
                        setSelected(c);
                        editForm.reset({ name: c.name, symbol: c.symbol ?? "" });
                      }
                    }}
                  >
                    <Pencil className="h-3.5 w-3.5" />
                  </Button>
                  {active && !isBase ? (
                    <Button
                      type="button"
                      size="sm"
                      variant="outline"
                      disabled={setBaseM.isPending}
                      onClick={() => setBaseM.mutate(id)}
                    >
                      <Star className="h-3.5 w-3.5" />
                      پایه
                    </Button>
                  ) : null}
                  {active && !isBase ? (
                    <Button type="button" size="sm" variant="ghost" onClick={() => setArchiveId(id)}>
                      <Archive className="h-3.5 w-3.5" />
                    </Button>
                  ) : null}
                </div>
              );
            },
          },
        ]}
        rows={(listQ.data ?? []) as unknown as Record<string, unknown>[]}
        empty={<EmptyState title="ارزی ثبت نشده" action={<Button onClick={() => setCreateOpen(true)}>ایجاد ارز</Button>} />}
      />

      <Dialog open={createOpen} onClose={() => setCreateOpen(false)} title="ایجاد ارز">
        <form className="space-y-3" onSubmit={createForm.handleSubmit((d) => createM.mutate(d))}>
          <div>
            <Label>کد</Label>
            <Input {...createForm.register("code")} dir="ltr" placeholder="IRR" />
            <FieldError>{createForm.formState.errors.code?.message}</FieldError>
          </div>
          <div>
            <Label>نام</Label>
            <Input {...createForm.register("name")} />
            <FieldError>{createForm.formState.errors.name?.message}</FieldError>
          </div>
          <div>
            <Label>نماد</Label>
            <Input {...createForm.register("symbol")} />
          </div>
          <Checkbox label="ارز پایه" {...createForm.register("is_base")} />
          <div className="flex justify-end gap-2">
            <Button type="button" variant="outline" onClick={() => setCreateOpen(false)}>
              انصراف
            </Button>
            <Button type="submit" disabled={createM.isPending}>
              ذخیره
            </Button>
          </div>
        </form>
      </Dialog>

      <Drawer
        open={!!selected}
        onClose={() => setSelected(null)}
        title="ویرایش ارز"
        description={selected ? `${selected.code} — ${selected.name}` : undefined}
      >
        <form className="space-y-4" onSubmit={editForm.handleSubmit((d) => updateM.mutate(d))}>
          <div>
            <Label>نام</Label>
            <Input {...editForm.register("name")} />
            <FieldError>{editForm.formState.errors.name?.message}</FieldError>
          </div>
          <div>
            <Label>نماد</Label>
            <Input {...editForm.register("symbol")} />
          </div>
          <div className="flex justify-end gap-2 pt-2">
            <Button type="button" variant="outline" onClick={() => setSelected(null)}>
              انصراف
            </Button>
            <Button type="submit" disabled={updateM.isPending}>
              ذخیره
            </Button>
          </div>
        </form>
      </Drawer>

      <ConfirmDialog
        open={!!archiveId}
        onClose={() => setArchiveId(null)}
        onConfirm={() => archiveId && archiveM.mutate(archiveId)}
        title="آرشیو ارز؟"
        description="ارز آرشیو شده دیگر در تراکنش‌های جدید قابل انتخاب نیست."
        confirmLabel="آرشیو"
        danger
        loading={archiveM.isPending}
      />
    </div>
  );
}
