import { Button } from "@repo/shadcn-ui/components/button";
import { ArrowDownIcon, ArrowUpIcon, Trash2Icon } from "lucide-react";
import { useId } from "react";

import type { FieldSection } from "./field-sections";
import { SelectWithAction } from "./select-with-action";
import { SwitchField } from "./switch-field";
import type { SectionBinding, SectionEditorLabels } from "./template-sections-editor";

export function TemplateSectionFields({
  sectionId,
  sections,
  fields,
  fieldNames,
  fieldNotes,
  labels,
  disabled,
  onChange,
}: {
  sectionId?: string | undefined;
  sections: readonly FieldSection[];
  fields: readonly SectionBinding[];
  fieldNames: Readonly<Record<string, string>>;
  fieldNotes?: Readonly<Record<string, string>> | undefined;
  labels: SectionEditorLabels;
  disabled: boolean;
  onChange: (fields: SectionBinding[]) => void;
}) {
  const prefix = useId();
  const grouped = fields.filter((field) => field.sectionId === sectionId);

  const move = (fieldId: string, offset: number) => {
    const position = grouped.findIndex((field) => field.fieldId === fieldId);
    const neighbor = grouped[position + offset];
    const current = grouped[position];

    if (!(neighbor && current)) {
      return;
    }
    const next = [...fields];
    const index = fields.indexOf(current);
    const other = fields.indexOf(neighbor);

    next[index] = neighbor;
    next[other] = current;
    onChange(next);
  };

  if (!(sectionId || grouped.length)) {
    return null;
  }

  return (
    <div className="space-y-2">
      {!sectionId && sections.length > 0 && (
        <h4 className="text-sm font-medium">{labels.ungrouped}</h4>
      )}
      {!grouped.length && <p className="text-xs text-muted-foreground">{labels.empty}</p>}
      {grouped.map((field, index) => {
        const name = fieldNames[field.fieldId] ?? field.fieldId;

        return (
          <div className="space-y-2 rounded-md border p-3" key={field.fieldId}>
            <div className="flex items-center justify-between gap-2">
              <div className="min-w-0">
                <p className="break-words text-sm font-medium">{name}</p>
                {fieldNotes?.[field.fieldId] && (
                  <p className="text-xs text-muted-foreground">{fieldNotes[field.fieldId]}</p>
                )}
              </div>
              <div className="flex shrink-0 items-center">
                <Button
                  aria-label={`${labels.moveUp}: ${name}`}
                  disabled={disabled || index === 0}
                  onClick={() => move(field.fieldId, -1)}
                  size="icon-sm"
                  type="button"
                  variant="ghost"
                >
                  <ArrowUpIcon />
                </Button>
                <Button
                  aria-label={`${labels.moveDown}: ${name}`}
                  disabled={disabled || index === grouped.length - 1}
                  onClick={() => move(field.fieldId, 1)}
                  size="icon-sm"
                  type="button"
                  variant="ghost"
                >
                  <ArrowDownIcon />
                </Button>
                <Button
                  aria-label={`${labels.removeField}: ${name}`}
                  disabled={disabled}
                  onClick={() => onChange(fields.filter((item) => item.fieldId !== field.fieldId))}
                  size="icon-sm"
                  type="button"
                  variant="ghost"
                >
                  <Trash2Icon />
                </Button>
              </div>
            </div>
            <div className="flex flex-wrap items-center gap-3">
              <SwitchField
                checked={field.required}
                disabled={disabled}
                id={`${prefix}-${field.fieldId}-required`}
                label={
                  <>
                    {labels.required}
                    <span className="sr-only">: {name}</span>
                  </>
                }
                onCheckedChange={(required) =>
                  onChange(
                    fields.map((item) =>
                      item.fieldId === field.fieldId ? { ...item, required } : item
                    )
                  )
                }
              />
              {sections.length > 0 && (
                <div className="min-w-40 flex-1">
                  <SelectWithAction
                    disabled={disabled}
                    id={`${prefix}-${field.fieldId}-section`}
                    label={`${labels.assign}: ${name}`}
                    onValueChange={(section) =>
                      onChange(
                        fields.map((item) =>
                          item.fieldId === field.fieldId
                            ? {
                                fieldId: item.fieldId,
                                required: item.required,
                                ...(section ? { sectionId: section } : {}),
                              }
                            : item
                        )
                      )
                    }
                    options={[
                      ...sections.map((section) => ({
                        value: section.id,
                        label: section.name || labels.name,
                      })),
                    ]}
                    placeholder={labels.ungrouped}
                    value={field.sectionId ?? ""}
                  />
                </div>
              )}
            </div>
          </div>
        );
      })}
    </div>
  );
}