'use client';

import { useTransition } from 'react';
import { useRouter } from 'next/navigation';
import Link from 'next/link';
import { Badge, Card, CardContent, CardHeader, CardTitle, IconButton, IconTrash } from '@/components/ui';
import { getGravatarUrl } from '@/lib/gravatar';
import type { OKR, KeyResult, OKRStatus, KeyResultStatus } from '@/lib/types';
import { OKR_STATUS_LABELS, KEY_RESULT_STATUS_LABELS } from '@/lib/types';

// Helper functions for status colors
function getOKRStatusColor(status: OKRStatus): { bg: string; color: string } {
  switch (status) {
    case 'NOT_STARTED':
      return {
        bg: 'color-mix(in srgb, #6b7280 15%, transparent)', // gray-500
        color: '#6b7280',
      };
    case 'IN_PROGRESS':
      return {
        bg: 'color-mix(in srgb, #3b82f6 15%, transparent)', // blue-500
        color: '#3b82f6',
      };
    case 'COMPLETED':
      return {
        bg: 'color-mix(in srgb, #10b981 15%, transparent)', // green-500 (success)
        color: '#10b981',
      };
    case 'CANCELLED':
      return {
        bg: 'color-mix(in srgb, #ef4444 15%, transparent)', // red-500 (destructive)
        color: '#ef4444',
      };
    default:
      return {
        bg: 'color-mix(in srgb, #6b7280 15%, transparent)',
        color: '#6b7280',
      };
  }
}

function getKeyResultStatusColor(status: KeyResultStatus): { bg: string; color: string } {
  switch (status) {
    case 'NOT_STARTED':
      return {
        bg: 'color-mix(in srgb, #6b7280 12%, transparent)', // gray-500
        color: '#6b7280',
      };
    case 'IN_PROGRESS':
      return {
        bg: 'color-mix(in srgb, #3b82f6 12%, transparent)', // blue-500
        color: '#3b82f6',
      };
    case 'COMPLETED':
      return {
        bg: 'color-mix(in srgb, #10b981 12%, transparent)', // green-500
        color: '#10b981',
      };
    case 'AT_RISK':
      return {
        bg: 'color-mix(in srgb, #f59e0b 12%, transparent)', // amber-500 (orange/yellow)
        color: '#f59e0b',
      };
    default:
      return {
        bg: 'color-mix(in srgb, #6b7280 12%, transparent)',
        color: '#6b7280',
      };
  }
}

interface OKRCardProps {
  okr: OKR & { teamMember?: { user: { id: string; email: string; name: string | null } } };
  teamId: string;
  isAdmin?: boolean;
  compact?: boolean;
}

export function OKRCard({ okr, teamId, isAdmin = false, compact = false }: OKRCardProps) {
  const router = useRouter();
  const [isPending, startTransition] = useTransition();
  const progress = okr.progress || 0;
  const progressColor =
    progress >= 75 ? 'var(--success)' : progress >= 25 ? 'var(--accent)' : 'var(--destructive)';

  const handleDelete = (e: React.MouseEvent) => {
    e.preventDefault();
    e.stopPropagation();

    if (!confirm(`Êtes-vous sûr de vouloir supprimer l'OKR "${okr.objective}" ?`)) {
      return;
    }

    startTransition(async () => {
      try {
        const response = await fetch(`/api/okrs/${okr.id}`, {
          method: 'DELETE',
        });

        if (!response.ok) {
          const error = await response.json();
          alert(error.error || "Erreur lors de la suppression de l'OKR");
          return;
        }

        router.refresh();
      } catch (error) {
        console.error('Error deleting OKR:', error);
        alert("Erreur lors de la suppression de l'OKR");
      }
    });
  };

  if (compact) {
    return (
      <Card hover className="relative group">
        <Link href={`/teams/${teamId}/okrs/${okr.id}`}>
          <CardHeader className="pb-2">
            <div className="flex items-start justify-between gap-3">
              <div className="flex-1 min-w-0 flex items-start gap-3">
                <span className="text-xl flex-shrink-0">🎯</span>
                <div className="flex-1 min-w-0">
                  <CardTitle className="text-lg leading-snug mb-1.5 line-clamp-2">
                    {okr.objective}
                  </CardTitle>
                  {okr.teamMember && (
                    <div className="flex items-center gap-1.5">
                      {/* eslint-disable-next-line @next/next/no-img-element */}
                      <img
                        src={getGravatarUrl(okr.teamMember.user.email, 96)}
                        alt={okr.teamMember.user.name || okr.teamMember.user.email}
                        width={16}
                        height={16}
                        className="rounded-full flex-shrink-0"
                      />
                      <span className="text-xs text-muted line-clamp-1">
                        {okr.teamMember.user.name || okr.teamMember.user.email}
                      </span>
                    </div>
                  )}
                </div>
              </div>
              <div className="flex items-center gap-1.5 flex-shrink-0 relative z-10">
                {isAdmin && (
                  <IconButton
                    icon={<IconTrash className="h-3 w-3" />}
                    label="Supprimer l'OKR"
                    variant="destructive"
                    size="xs"
                    onClick={handleDelete}
                    className="flex-shrink-0"
                    style={{
                      color: 'var(--destructive)',
                      border: '1px solid color-mix(in srgb, var(--destructive) 40%, transparent)',
                      backgroundColor: 'color-mix(in srgb, var(--destructive) 5%, transparent)',
                    }}
                    disabled={isPending}
                  />
                )}
                <Badge
                  style={{
                    backgroundColor: 'color-mix(in srgb, var(--purple) 15%, transparent)',
                    color: 'var(--purple)',
                    fontSize: '11px',
                    padding: '2px 6px',
                  }}
                >
                  {okr.period}
                </Badge>
              </div>
            </div>
          </CardHeader>
          <CardContent className="pt-0 pb-3">
            <div className="flex items-center gap-4">
              {/* Progress Bar */}
              <div className="flex-1 min-w-0">
                <div className="mb-1 flex items-center justify-between text-xs">
                  <span className="text-muted">Progression</span>
                  <span className="font-medium" style={{ color: progressColor }}>
                    {progress}%
                  </span>
                </div>
                <div className="h-1.5 w-full overflow-hidden rounded-full bg-card-column">
                  <div
                    className="h-full transition-all"
                    style={{
                      width: `${progress}%`,
                      backgroundColor: progressColor,
                    }}
                  />
                </div>
              </div>

              {/* Status */}
              <div className="flex items-center gap-2 flex-shrink-0">
                <Badge style={getOKRStatusColor(okr.status)} className="text-xs px-2 py-0.5">
                  {OKR_STATUS_LABELS[okr.status]}
                </Badge>
                {okr.keyResults && okr.keyResults.length > 0 && (
                  <span className="text-xs text-muted whitespace-nowrap">
                    {okr.keyResults.length} KR{okr.keyResults.length !== 1 ? 's' : ''}
                  </span>
                )}
              </div>
            </div>
          </CardContent>
        </Link>
      </Card>
    );
  }

  return (
    <Card hover className="h-full relative group">
      <CardHeader>
        <div className="flex items-start justify-between gap-2">
          <Link href={`/teams/${teamId}/okrs/${okr.id}`} className="flex-1 min-w-0">
            <div className="flex items-start justify-between">
              <div className="flex-1 pr-2">
                <CardTitle className="flex items-center gap-2">
                  <span className="text-xl">🎯</span>
                  {okr.objective}
                </CardTitle>
                {okr.teamMember && (
                  <div className="mt-2 flex items-center gap-2">
                    {/* eslint-disable-next-line @next/next/no-img-element */}
                    <img
                      src={getGravatarUrl(okr.teamMember.user.email, 96)}
                      alt={okr.teamMember.user.name || okr.teamMember.user.email}
                      width={24}
                      height={24}
                      className="rounded-full"
                    />
                    <span className="text-sm text-muted">
                      {okr.teamMember.user.name || okr.teamMember.user.email}
                    </span>
                  </div>
                )}
              </div>
            </div>
          </Link>

          {/* Action Zone */}
          <div className="flex items-center gap-2 flex-shrink-0 relative z-10">
            {isAdmin && (
              <IconButton
                icon={<IconTrash className="h-4 w-4" />}
                label="Supprimer l'OKR"
                variant="destructive"
                size="sm"
                onClick={handleDelete}
                className="flex-shrink-0"
                style={{
                  color: 'var(--destructive)',
                  border: '1px solid color-mix(in srgb, var(--destructive) 40%, transparent)',
                  backgroundColor: 'color-mix(in srgb, var(--destructive) 5%, transparent)',
                }}
                disabled={isPending}
              />
            )}
            <Badge
              style={{
                backgroundColor: 'color-mix(in srgb, var(--purple) 15%, transparent)',
                color: 'var(--purple)',
              }}
            >
              {okr.period}
            </Badge>
          </div>
        </div>
      </CardHeader>
      <Link href={`/teams/${teamId}/okrs/${okr.id}`}>
        <CardContent>
          <div className="space-y-3">
            {/* Progress Bar */}
            <div>
              <div className="mb-1 flex items-center justify-between text-sm">
                <span className="text-muted">Progression</span>
                <span className="font-medium" style={{ color: progressColor }}>
                  {progress}%
                </span>
              </div>
              <div className="h-2 w-full overflow-hidden rounded-full bg-card-column">
                <div
                  className="h-full transition-all"
                  style={{
                    width: `${progress}%`,
                    backgroundColor: progressColor,
                  }}
                />
              </div>
            </div>

            {/* Status */}
            <div className="flex items-center gap-2">
              <span className="text-sm text-muted">Statut:</span>
              <Badge style={getOKRStatusColor(okr.status)}>{OKR_STATUS_LABELS[okr.status]}</Badge>
            </div>

            {/* Key Results List */}
            {okr.keyResults && okr.keyResults.length > 0 && (
              <div className="space-y-2 pt-2 border-t border-border">
                <div className="text-xs font-medium text-muted uppercase tracking-wide">
                  Key Results ({okr.keyResults.length})
                </div>
                <div className="space-y-2">
                  {okr.keyResults
                    .sort((a, b) => a.order - b.order)
                    .map((kr: KeyResult) => {
                      const krProgress =
                        kr.targetValue > 0 ? (kr.currentValue / kr.targetValue) * 100 : 0;
                      const krProgressColor =
                        krProgress >= 100
                          ? 'var(--success)'
                          : krProgress >= 50
                            ? 'var(--accent)'
                            : 'var(--destructive)';

                      return (
                        <div key={kr.id} className="space-y-1">
                          <div className="flex items-start justify-between gap-2">
                            <span className="text-sm text-foreground flex-1 line-clamp-2">
                              {kr.title}
                            </span>
                            <Badge
                              style={{
                                ...getKeyResultStatusColor(kr.status),
                                fontSize: '10px',
                                padding: '2px 6px',
                              }}
                            >
                              {KEY_RESULT_STATUS_LABELS[kr.status]}
                            </Badge>
                          </div>
                          <div className="space-y-1">
                            <div className="flex items-center justify-between text-xs text-muted">
                              <span>
                                {kr.currentValue} / {kr.targetValue} {kr.unit}
                              </span>
                              <span className="font-medium" style={{ color: krProgressColor }}>
                                {Math.round(krProgress)}%
                              </span>
                            </div>
                            <div className="h-1.5 w-full overflow-hidden rounded-full bg-card-column">
                              <div
                                className="h-full transition-all"
                                style={{
                                  width: `${Math.min(krProgress, 100)}%`,
                                  backgroundColor: krProgressColor,
                                }}
                              />
                            </div>
                          </div>
                        </div>
                      );
                    })}
                </div>
              </div>
            )}
          </div>
        </CardContent>
      </Link>
    </Card>
  );
}