import { useDeviceId } from "@/shared/hooks/use-device-id"
import { useEffect, useState } from "react"
import { useLegislation } from "../hooks/use-legislation"
import { useUserVote } from "../hooks/use-user-vote"
import { fetchLegislationResults } from "../lib/legislation-api"
import { VoteResult } from "./vote-result"
import { VoteWidget } from "./vote-widget"

interface LegislationDetailProps {
	legislationId: number
}

export function LegislationDetail({ legislationId }: LegislationDetailProps) {
	const { legislation, loading, error } = useLegislation(legislationId)
	const { vote, castVote } = useUserVote(legislationId)
	const [showFullText, setShowFullText] = useState(false)
	const deviceId = useDeviceId()
	const [results, setResults] = useState<{
		pollId: number
		votes: {
			politicianId: number
			name: string
			fraction: string | null
			vote: string
		}[]
	} | null>(null)

	useEffect(() => {
		if (!deviceId) return
		fetchLegislationResults(legislationId, deviceId)
			.then(setResults)
			.catch(() => null)
	}, [legislationId, deviceId])

	if (loading) {
		return <div className="p-4 text-center text-muted-foreground">Laden…</div>
	}

	if (error || !legislation) {
		return (
			<div className="p-4 text-center text-destructive">
				{error ?? "Gesetzesvorlage nicht gefunden"}
			</div>
		)
	}

	return (
		<div className="p-4 space-y-6">
			<div>
				<h1 className="text-lg font-semibold leading-tight">
					{legislation.title}
				</h1>
				{legislation.beratungsstand && (
					<span className="inline-block mt-2 text-xs px-2 py-1 rounded-full bg-secondary text-secondary-foreground">
						{legislation.beratungsstand}
					</span>
				)}
			</div>

			{/* Summary or abstract */}
			<div className="space-y-2">
				{legislation.summary ? (
					<p className="text-sm leading-relaxed">{legislation.summary}</p>
				) : legislation.abstract ? (
					<p className="text-sm leading-relaxed text-muted-foreground">
						{legislation.abstract}
					</p>
				) : (
					<p className="text-sm text-muted-foreground italic">
						Keine Zusammenfassung verfügbar
					</p>
				)}
			</div>

			{/* Full text toggle */}
			{legislation.fullText && (
				<div>
					<button
						type="button"
						onClick={() => setShowFullText(!showFullText)}
						className="text-sm text-primary hover:underline"
					>
						{showFullText ? "Volltext ausblenden" : "Volltext anzeigen"}
					</button>
					{showFullText && (
						<pre className="mt-2 p-3 bg-muted rounded-lg text-xs overflow-auto max-h-96 whitespace-pre-wrap">
							{legislation.fullText}
						</pre>
					)}
				</div>
			)}

			{/* Vote section */}
			<div className="space-y-3">
				<h2 className="text-sm font-medium">Dein Vote</h2>
				<VoteWidget currentVote={vote} onVote={castVote} />
				{vote && (
					<p className="text-xs text-muted-foreground text-center">
						Du hast mit{" "}
						<span className="font-medium">
							{vote === "ja" ? "Ja" : vote === "nein" ? "Nein" : "Enthaltung"}
						</span>{" "}
						gestimmt. Du kannst deine Stimme jederzeit ändern.
					</p>
				)}
			</div>

			{results && vote && (
				<div className="space-y-3">
					<h2 className="text-sm font-medium">Ergebnis</h2>
					<VoteResult userVote={vote} politicianVotes={results.votes} />
				</div>
			)}
		</div>
	)
}