import { useEffect, useState } from "react";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import {
  Alert,
  Box,
  Button,
  CircularProgress,
  Dialog,
  DialogActions,
  DialogContent,
  DialogTitle,
  Stack,
  Typography,
} from "@mui/material";
import { VendorFormFields } from "./vendor-form-fields";
import { vendorSchema, type VendorFormValues } from "@/domain/vendors/schemas/vendor-schema";
import { useCreateVendor } from "@/domain/vendors/use-cases/use-create-vendor";
import { useVendorFacets } from "@/domain/vendors/use-cases/use-vendor-facets";
import type { VendorFacetCompany } from "@/domain/vendors/types/vendor";

interface VendorCreateModalProps {
  open: boolean;
  onClose: () => void;
  tradeOptions: string[];
}

const defaultValues: VendorFormValues = {
  companyName: "",
  contactName: "",
  email: "",
  phone: "",
  companyPhone: "",
  googleMapsUrl: "",
  notes: "",
  totalJobs: 0,
  address: "",
  city: "",
  state: "",
  zip: "",
  tradeSpecialties: "",
  isActive: true,
};

export function VendorCreateModal({ open, onClose, tradeOptions }: VendorCreateModalProps) {
  const { data: facets, isLoading: isLoadingFacets, error: facetsError } = useVendorFacets();
  const createVendor = useCreateVendor();
  const [submitError, setSubmitError] = useState<string | null>(null);

  const {
    control,
    handleSubmit,
    reset,
    setValue,
    formState: { errors },
  } = useForm<VendorFormValues>({
    resolver: zodResolver(vendorSchema),
    defaultValues,
  });

  useEffect(() => {
    if (open) {
      reset(defaultValues);
      setSubmitError(null);
    }
  }, [open, reset]);

  const onCompanySelected = (company: VendorFacetCompany | null) => {
    if (!company) return;
    setValue("companyPhone", company.companyPhone);
    setValue("email", company.email);
    setValue("address", company.address);
    setValue("city", company.city);
    setValue("state", company.state);
    setValue("zip", company.zip);
    setValue("googleMapsUrl", company.googleMapsUrl);
  };

  const onSubmit = (values: VendorFormValues) => {
    setSubmitError(null);
    createVendor.mutate(values, {
      onSuccess: () => {
        onClose();
      },
      onError: (error: Error) => {
        setSubmitError(error.message || "Failed to create vendor");
      },
    });
  };

  const companies = facets?.companies ?? [];

  return (
    <Dialog
      open={open}
      onClose={createVendor.isPending ? undefined : onClose}
      fullWidth
      maxWidth="sm"
      aria-labelledby="vendor-create-dialog-title"
      slotProps={{ paper: { role: "dialog" } }}
    >
      <DialogTitle id="vendor-create-dialog-title">
        Add Vendor
        <Typography variant="body2" sx={{ color: "text.secondary", mt: 0.5 }}>
          Register a technician and their vendor company.
        </Typography>
      </DialogTitle>
      <DialogContent>
        <Stack spacing={2} className="mt-1">
          {Boolean(facetsError) && (
            <Alert severity="warning">
              Company autocomplete unavailable. You can still type a company manually.
            </Alert>
          )}
          {Boolean(submitError) && <Alert severity="error">{submitError}</Alert>}
          {isLoadingFacets ? (
            <CircularProgress size={24} />
          ) : (
            <Box>
              <VendorFormFields
                control={control}
                errors={errors}
                companies={companies}
                tradeOptions={tradeOptions}
                onCompanySelected={onCompanySelected}
              />
            </Box>
          )}
        </Stack>
      </DialogContent>
      <DialogActions>
        <Button onClick={onClose} disabled={createVendor.isPending}>
          Cancel
        </Button>
        <Button
          color="primary"
          variant="contained"
          onClick={handleSubmit(onSubmit)}
          disabled={createVendor.isPending}
        >
          {createVendor.isPending ? "Saving..." : "Add Vendor"}
        </Button>
      </DialogActions>
    </Dialog>
  );
}