"use client";

import { useState } from "react";
import { useRouter } from "next/navigation";
import { CheckIcon, CrosshairIcon, EyeIcon, EyeOffIcon, Loader2Icon, XIcon } from "lucide-react";
import { Item, ItemContent, ItemHeader, ItemTitle } from "@/components/ui/item";
import { Button } from "@/components/ui/button";
import {
  Tooltip,
  TooltipContent,
  TooltipProvider,
  TooltipTrigger,
} from "@/components/ui/tooltip";
import { toggleObjectiveRedacted } from "@/app/(frontend)/intelligence/missions/objectives/actions";
import { redactText } from "@/lib/redaction";

interface Objective {
  title: string;
  description?: string | null;
  missionCritical?: boolean | null;
  successOrFailConditions?: string | null;
  redacted?: boolean | null;
}

interface MissionObjectivesProps {
  objectives: Objective[] | null;
  missionId?: number;
  isEditable?: boolean;
  canReveal?: boolean;
}

function ObjectiveText({
  text,
  redacted,
  canReveal,
  className,
}: {
  text: string | null | undefined;
  redacted: boolean;
  canReveal: boolean;
  className?: string;
}) {
  if (!redacted) {
    return <span className={className}>{text ?? "-"}</span>;
  }

  const display = redactText(text) ?? "-";

  if (!canReveal) {
    return <span className={`${className ?? ""} select-none break-all`}>{display}</span>;
  }

  return (
    <TooltipProvider delayDuration={150}>
      <Tooltip>
        <TooltipTrigger asChild>
          <span className={`${className ?? ""} cursor-help select-none break-all`}>{display}</span>
        </TooltipTrigger>
        <TooltipContent className="max-w-sm whitespace-pre-wrap break-words">
          {text ?? "-"}
        </TooltipContent>
      </Tooltip>
    </TooltipProvider>
  );
}

export function MissionObjectives({
  objectives,
  missionId,
  isEditable = false,
  canReveal = false,
}: MissionObjectivesProps) {
  const router = useRouter();
  const [togglingIndex, setTogglingIndex] = useState<number | null>(null);
  const [toggleError, setToggleError] = useState<string | null>(null);

  if (!objectives || objectives.length === 0) {
    return (
      <Item variant="outline">
        <ItemHeader>
          <div className="flex items-center gap-2">
            <CrosshairIcon className="size-4 text-muted-foreground" />
            <ItemTitle>Objectives</ItemTitle>
          </div>
        </ItemHeader>
        <ItemContent>
          <p className="text-sm text-muted-foreground italic">No objectives defined.</p>
        </ItemContent>
      </Item>
    );
  }

  return (
    <div className="flex flex-col gap-3">
      <div className="flex items-center gap-2">
        <CrosshairIcon className="size-4 text-muted-foreground" />
        <h2 className="text-sm font-semibold uppercase tracking-wider text-muted-foreground">
          Objectives
        </h2>
      </div>
      <div className="border border-border rounded-lg overflow-x-auto">
        <table className="w-full text-sm">
          <thead>
            <tr className="bg-muted/50 border-b border-border">
              <th className="text-left px-4 py-2.5 font-semibold uppercase text-xs tracking-wider text-muted-foreground">
                Title
              </th>
              <th className="text-left px-4 py-2.5 font-semibold uppercase text-xs tracking-wider text-muted-foreground">
                Description
              </th>
              <th className="text-center px-4 py-2.5 font-semibold uppercase text-xs tracking-wider text-muted-foreground">
                Critical
              </th>
              <th className="text-left px-4 py-2.5 font-semibold uppercase text-xs tracking-wider text-muted-foreground">
                Success / Fail Conditions
              </th>
              {isEditable && (
                <th className="text-center px-4 py-2.5 font-semibold uppercase text-xs tracking-wider text-muted-foreground">
                  Actions
                </th>
              )}
            </tr>
          </thead>
          <tbody>
            {objectives.map((obj, index) => (
              <tr key={index} className="border-b border-border/50">
                <td className="px-4 py-2 font-medium">
                  <ObjectiveText
                    text={obj.title}
                    redacted={!!obj.redacted}
                    canReveal={canReveal}
                  />
                </td>
                <td className="px-4 py-2 text-muted-foreground max-w-md wrap-break-word">
                  <ObjectiveText
                    text={obj.description}
                    redacted={!!obj.redacted}
                    canReveal={canReveal}
                  />
                </td>
                <td className="px-4 py-2 text-center">
                  {obj.missionCritical ? (
                    <CheckIcon className="size-3.5 text-orange-400 inline" />
                  ) : (
                    <XIcon className="size-3.5 text-muted-foreground inline" />
                  )}
                </td>
                <td className="px-4 py-2 text-muted-foreground">
                  <ObjectiveText
                    text={obj.successOrFailConditions}
                    redacted={!!obj.redacted}
                    canReveal={canReveal}
                  />
                </td>
                {isEditable && (
                  <td className="px-4 py-2 text-center whitespace-nowrap">
                    <Button
                      variant="outline"
                      size="sm"
                      disabled={togglingIndex !== null}
                      onClick={async () => {
                        if (!missionId || togglingIndex !== null) return;
                        setToggleError(null);
                        setTogglingIndex(index);
                        try {
                          const res = await toggleObjectiveRedacted({
                            missionId,
                            objectiveIndex: index,
                            redacted: !obj.redacted,
                          });
                          if (!res.success) {
                            setToggleError(res.error ?? "Failed to update objective.");
                            return;
                          }
                          router.refresh();
                        } catch {
                          setToggleError("Something went wrong. Please try again.");
                        } finally {
                          setTogglingIndex(null);
                        }
                      }}
                    >
                      {togglingIndex === index ? (
                        <Loader2Icon className="size-3.5 mr-1 animate-spin" />
                      ) : obj.redacted ? (
                        <>
                          <EyeIcon className="size-3.5 mr-1" />
                          Show
                        </>
                      ) : (
                        <>
                          <EyeOffIcon className="size-3.5 mr-1" />
                          Hide
                        </>
                      )}
                    </Button>
                  </td>
                )}
              </tr>
            ))}
          </tbody>
        </table>
      </div>
      {toggleError && <p className="text-sm text-destructive">{toggleError}</p>}
    </div>
  );
}