import { useState, useRef, useEffect, useCallback } from "react";
import {
  Tooltip,
  TooltipTrigger,
  TooltipContent,
} from "@/components/ui/tooltip";
import { HelpCircle, ChevronDown, ChevronRight } from "lucide-react";
import { cn } from "../lib/utils";

/* ---- Help text for (?) tooltips ---- */
export const help: Record<string, string> = {
  name: "Display name for this agent.",
  title: "Job title shown in the org chart.",
  role: "Organizational role. Determines position and capabilities.",
  reportsTo: "The agent this one reports to in the org hierarchy.",
  capabilities: "Describes what this agent can do. Shown in the org chart and used for task routing.",
  adapterType: "How this agent runs: local CLI (Claude/Codex), spawned process, or HTTP webhook.",
  cwd: "The working directory where the agent operates. Use an absolute path on the machine running Paperclip.",
  promptTemplate: "The prompt sent to the agent on each heartbeat. Supports {{ agent.id }}, {{ agent.name }}, {{ agent.role }} variables.",
  model: "Override the default model used by the adapter.",
  thinkingEffort: "Control model reasoning depth. Supported values vary by adapter/model.",
  dangerouslySkipPermissions: "Run Claude without permission prompts. Required for unattended operation.",
  dangerouslyBypassSandbox: "Run Codex without sandbox restrictions. Required for filesystem/network access.",
  search: "Enable Codex web search capability during runs.",
  bootstrapPrompt: "Prompt used only on the first run (no existing session). Used for initial agent setup.",
  maxTurnsPerRun: "Maximum number of agentic turns (tool calls) per heartbeat run.",
  command: "The command to execute (e.g. node, python).",
  localCommand: "Override the local CLI command (e.g. claude, /usr/local/bin/claude, codex).",
  args: "Command-line arguments, comma-separated.",
  extraArgs: "Extra CLI arguments for local adapters, comma-separated.",
  envVars: "Environment variables injected into the adapter process. Use plain values or secret references.",
  webhookUrl: "The URL that receives POST requests when the agent is invoked.",
  heartbeatInterval: "Run this agent automatically on a timer. Useful for periodic tasks like checking for new work.",
  intervalSec: "Seconds between automatic heartbeat invocations.",
  timeoutSec: "Maximum seconds a run can take before being terminated. 0 means no timeout.",
  graceSec: "Seconds to wait after sending interrupt before force-killing the process.",
  wakeOnDemand: "Allow this agent to be woken by assignments, API calls, UI actions, or automated systems.",
  cooldownSec: "Minimum seconds between consecutive heartbeat runs.",
  maxConcurrentRuns: "Maximum number of heartbeat runs that can execute simultaneously for this agent.",
  budgetMonthlyCents: "Monthly spending limit in cents. 0 means no limit.",
};

export const adapterLabels: Record<string, string> = {
  claude_local: "Claude (local)",
  codex_local: "Codex (local)",
  process: "Process",
  http: "HTTP",
};

export const roleLabels: Record<string, string> = {
  ceo: "CEO", cto: "CTO", cmo: "CMO", cfo: "CFO",
  engineer: "Engineer", designer: "Designer", pm: "PM",
  qa: "QA", devops: "DevOps", researcher: "Researcher", general: "General",
};

/* ---- Primitive components ---- */

export function HintIcon({ text }: { text: string }) {
  return (
    <Tooltip>
      <TooltipTrigger asChild>
        <button type="button" className="inline-flex text-muted-foreground/50 hover:text-muted-foreground transition-colors">
          <HelpCircle className="h-3 w-3" />
        </button>
      </TooltipTrigger>
      <TooltipContent side="top" className="max-w-xs">
        {text}
      </TooltipContent>
    </Tooltip>
  );
}

export function Field({ label, hint, children }: { label: string; hint?: string; children: React.ReactNode }) {
  return (
    <div>
      <div className="flex items-center gap-1.5 mb-1">
        <label className="text-xs text-muted-foreground">{label}</label>
        {hint && <HintIcon text={hint} />}
      </div>
      {children}
    </div>
  );
}

export function ToggleField({
  label,
  hint,
  checked,
  onChange,
}: {
  label: string;
  hint?: string;
  checked: boolean;
  onChange: (v: boolean) => void;
}) {
  return (
    <div className="flex items-center justify-between">
      <div className="flex items-center gap-1.5">
        <span className="text-xs text-muted-foreground">{label}</span>
        {hint && <HintIcon text={hint} />}
      </div>
      <button
        className={cn(
          "relative inline-flex h-5 w-9 items-center rounded-full transition-colors",
          checked ? "bg-green-600" : "bg-muted"
        )}
        onClick={() => onChange(!checked)}
      >
        <span
          className={cn(
            "inline-block h-3.5 w-3.5 rounded-full bg-white transition-transform",
            checked ? "translate-x-4.5" : "translate-x-0.5"
          )}
        />
      </button>
    </div>
  );
}

export function ToggleWithNumber({
  label,
  hint,
  checked,
  onCheckedChange,
  number,
  onNumberChange,
  numberLabel,
  numberHint,
  numberPrefix,
  showNumber,
}: {
  label: string;
  hint?: string;
  checked: boolean;
  onCheckedChange: (v: boolean) => void;
  number: number;
  onNumberChange: (v: number) => void;
  numberLabel: string;
  numberHint?: string;
  numberPrefix?: string;
  showNumber: boolean;
}) {
  return (
    <div className="space-y-2">
      <div className="flex items-center justify-between gap-3">
        <div className="flex items-center gap-1.5">
          <span className="text-xs text-muted-foreground">{label}</span>
          {hint && <HintIcon text={hint} />}
        </div>
        <button
          className={cn(
            "relative inline-flex h-5 w-9 items-center rounded-full transition-colors shrink-0",
            checked ? "bg-green-600" : "bg-muted"
          )}
          onClick={() => onCheckedChange(!checked)}
        >
          <span
            className={cn(
              "inline-block h-3.5 w-3.5 rounded-full bg-white transition-transform",
              checked ? "translate-x-4.5" : "translate-x-0.5"
            )}
          />
        </button>
      </div>
      {showNumber && (
        <div className="flex items-center gap-1.5 text-xs text-muted-foreground">
          {numberPrefix && <span>{numberPrefix}</span>}
          <input
            type="number"
            className="w-16 rounded-md border border-border px-2 py-0.5 bg-transparent outline-none text-xs font-mono text-center"
            value={number}
            onChange={(e) => onNumberChange(Number(e.target.value))}
          />
          <span>{numberLabel}</span>
          {numberHint && <HintIcon text={numberHint} />}
        </div>
      )}
    </div>
  );
}

export function CollapsibleSection({
  title,
  icon,
  open,
  onToggle,
  bordered,
  children,
}: {
  title: string;
  icon?: React.ReactNode;
  open: boolean;
  onToggle: () => void;
  bordered?: boolean;
  children: React.ReactNode;
}) {
  return (
    <div className={cn(bordered && "border-t border-border")}>
      <button
        className="flex items-center gap-2 w-full px-4 py-2 text-xs font-medium text-muted-foreground hover:bg-accent/30 transition-colors"
        onClick={onToggle}
      >
        {open ? <ChevronDown className="h-3 w-3" /> : <ChevronRight className="h-3 w-3" />}
        {icon}
        {title}
      </button>
      {open && <div className="px-4 pb-3">{children}</div>}
    </div>
  );
}

export function AutoExpandTextarea({
  value,
  onChange,
  onBlur,
  placeholder,
  minRows,
}: {
  value: string;
  onChange: (v: string) => void;
  onBlur?: () => void;
  placeholder?: string;
  minRows?: number;
}) {
  const textareaRef = useRef<HTMLTextAreaElement>(null);
  const rows = minRows ?? 3;
  const lineHeight = 20;
  const minHeight = rows * lineHeight;

  const adjustHeight = useCallback(() => {
    const el = textareaRef.current;
    if (!el) return;
    el.style.height = "auto";
    el.style.height = `${Math.max(minHeight, el.scrollHeight)}px`;
  }, [minHeight]);

  useEffect(() => { adjustHeight(); }, [value, adjustHeight]);

  return (
    <textarea
      ref={textareaRef}
      className="w-full rounded-md border border-border px-2.5 py-1.5 bg-transparent outline-none text-sm font-mono placeholder:text-muted-foreground/40 resize-none overflow-hidden"
      placeholder={placeholder}
      value={value}
      onChange={(e) => onChange(e.target.value)}
      onBlur={onBlur}
      style={{ minHeight }}
    />
  );
}

/**
 * Text input that manages internal draft state.
 * Calls `onCommit` on blur (and optionally on every change if `immediate` is set).
 */
export function DraftInput({
  value,
  onCommit,
  immediate,
  className,
  ...props
}: {
  value: string;
  onCommit: (v: string) => void;
  immediate?: boolean;
  className?: string;
} & Omit<React.InputHTMLAttributes<HTMLInputElement>, "value" | "onChange" | "className">) {
  const [draft, setDraft] = useState(value);
  useEffect(() => setDraft(value), [value]);

  return (
    <input
      className={className}
      value={draft}
      onChange={(e) => {
        setDraft(e.target.value);
        if (immediate) onCommit(e.target.value);
      }}
      onBlur={() => {
        if (draft !== value) onCommit(draft);
      }}
      {...props}
    />
  );
}

/**
 * Auto-expanding textarea with draft state and blur-commit.
 */
export function DraftTextarea({
  value,
  onCommit,
  immediate,
  placeholder,
  minRows,
}: {
  value: string;
  onCommit: (v: string) => void;
  immediate?: boolean;
  placeholder?: string;
  minRows?: number;
}) {
  const [draft, setDraft] = useState(value);
  useEffect(() => setDraft(value), [value]);

  const textareaRef = useRef<HTMLTextAreaElement>(null);
  const rows = minRows ?? 3;
  const lineHeight = 20;
  const minHeight = rows * lineHeight;

  const adjustHeight = useCallback(() => {
    const el = textareaRef.current;
    if (!el) return;
    el.style.height = "auto";
    el.style.height = `${Math.max(minHeight, el.scrollHeight)}px`;
  }, [minHeight]);

  useEffect(() => { adjustHeight(); }, [draft, adjustHeight]);

  return (
    <textarea
      ref={textareaRef}
      className="w-full rounded-md border border-border px-2.5 py-1.5 bg-transparent outline-none text-sm font-mono placeholder:text-muted-foreground/40 resize-none overflow-hidden"
      placeholder={placeholder}
      value={draft}
      onChange={(e) => {
        setDraft(e.target.value);
        if (immediate) onCommit(e.target.value);
      }}
      onBlur={() => {
        if (draft !== value) onCommit(draft);
      }}
      style={{ minHeight }}
    />
  );
}

/**
 * Number input with draft state and blur-commit.
 */
export function DraftNumberInput({
  value,
  onCommit,
  immediate,
  className,
  ...props
}: {
  value: number;
  onCommit: (v: number) => void;
  immediate?: boolean;
  className?: string;
} & Omit<React.InputHTMLAttributes<HTMLInputElement>, "value" | "onChange" | "className" | "type">) {
  const [draft, setDraft] = useState(String(value));
  useEffect(() => setDraft(String(value)), [value]);

  return (
    <input
      type="number"
      className={className}
      value={draft}
      onChange={(e) => {
        setDraft(e.target.value);
        if (immediate) onCommit(Number(e.target.value) || 0);
      }}
      onBlur={() => {
        const num = Number(draft) || 0;
        if (num !== value) onCommit(num);
      }}
      {...props}
    />
  );
}