'use client';

import { useState } from 'react';
import { toast } from 'sonner';
import {
  Sheet,
  SheetContent,
  SheetHeader,
  SheetTitle
} from '@/components/ui/sheet';
import { Button } from '@/components/ui/button';
import { Input } from '@/components/ui/input';
import { Label } from '@/components/ui/label';
import { Textarea } from '@/components/ui/textarea';
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue
} from '@/components/ui/select';
import {
  AlertDialog,
  AlertDialogAction,
  AlertDialogCancel,
  AlertDialogContent,
  AlertDialogDescription,
  AlertDialogFooter,
  AlertDialogHeader,
  AlertDialogTitle
} from '@/components/ui/alert-dialog';

interface Task {
  id: string;
  title: string;
  description?: string;
  status: 'todo' | 'in_progress' | 'done';
  priority: 'low' | 'medium' | 'high' | 'urgent';
  domain: string;
  due_date?: string;
  project_id?: string;
  tags: string[];
}

interface TaskDetailPanelProps {
  task: Task;
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onUpdate: () => void;
}

export function TaskDetailPanel({
  task,
  open,
  onOpenChange,
  onUpdate
}: TaskDetailPanelProps) {
  const [title, setTitle] = useState(task.title);
  const [description, setDescription] = useState(task.description || '');
  const [status, setStatus] = useState(task.status);
  const [priority, setPriority] = useState(task.priority);
  const [domain, setDomain] = useState(task.domain);
  const [dueDate, setDueDate] = useState(task.due_date || '');
  const [saving, setSaving] = useState(false);
  const [deleteOpen, setDeleteOpen] = useState(false);
  const [deleting, setDeleting] = useState(false);

  async function handleSave() {
    setSaving(true);
    try {
      const response = await fetch(`/api/tasks/${task.id}`, {
        method: 'PATCH',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          title,
          description,
          status,
          priority,
          domain,
          due_date: dueDate || null
        })
      });
      if (!response.ok) throw new Error('Unable to save task');
      onUpdate();
      onOpenChange(false);
      toast.success('Task saved');
    } catch (error) {
      console.error('Failed to update task:', error);
      toast.error('Unable to save task');
    } finally {
      setSaving(false);
    }
  }

  async function handleDelete() {
    setDeleting(true);
    try {
      const response = await fetch(`/api/tasks/${task.id}`, {
        method: 'DELETE'
      });
      if (!response.ok) throw new Error('Unable to delete task');
      onUpdate();
      setDeleteOpen(false);
      onOpenChange(false);
      toast.success('Task deleted');
    } catch (error) {
      console.error('Failed to delete task:', error);
      toast.error('Unable to delete task');
    } finally {
      setDeleting(false);
    }
  }

  return (
    <Sheet open={open} onOpenChange={onOpenChange}>
      <SheetContent className="w-[500px] sm:w-[600px] overflow-y-auto">
        <SheetHeader>
          <SheetTitle>Task Details</SheetTitle>
        </SheetHeader>

        <div className="mt-6 space-y-6">
          <div className="space-y-2">
            <Label htmlFor="title">Title</Label>
            <Input
              id="title"
              value={title}
              onChange={(e) => setTitle(e.target.value)}
              placeholder="Task title"
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="description">Description</Label>
            <Textarea
              id="description"
              value={description}
              onChange={(e) => setDescription(e.target.value)}
              placeholder="Add a description..."
              rows={4}
            />
          </div>

          <div className="grid grid-cols-2 gap-4">
            <div className="space-y-2">
              <Label htmlFor="task-status">Status</Label>
              <Select
                value={status}
                onValueChange={(v) => setStatus(v as Task['status'])}
              >
                <SelectTrigger id="task-status">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="todo">To Do</SelectItem>
                  <SelectItem value="in_progress">In Progress</SelectItem>
                  <SelectItem value="done">Done</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="space-y-2">
              <Label htmlFor="task-priority">Priority</Label>
              <Select
                value={priority}
                onValueChange={(v) => setPriority(v as Task['priority'])}
              >
                <SelectTrigger id="task-priority">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="low">Low</SelectItem>
                  <SelectItem value="medium">Medium</SelectItem>
                  <SelectItem value="high">High</SelectItem>
                  <SelectItem value="urgent">Urgent</SelectItem>
                </SelectContent>
              </Select>
            </div>
          </div>

          <div className="grid grid-cols-2 gap-4">
            <div className="space-y-2">
              <Label htmlFor="task-domain">Domain</Label>
              <Select value={domain} onValueChange={setDomain}>
                <SelectTrigger id="task-domain">
                  <SelectValue />
                </SelectTrigger>
                <SelectContent>
                  <SelectItem value="personal">Personal</SelectItem>
                  <SelectItem value="work">Work</SelectItem>
                  <SelectItem value="ots">OTS</SelectItem>
                </SelectContent>
              </Select>
            </div>

            <div className="space-y-2">
              <Label htmlFor="task-due-date">Due Date</Label>
              <Input
                id="task-due-date"
                type="date"
                value={dueDate}
                onChange={(e) => setDueDate(e.target.value)}
              />
            </div>
          </div>

          <div className="flex gap-2 pt-4">
            <Button onClick={handleSave} disabled={saving}>
              {saving ? 'Saving...' : 'Save Changes'}
            </Button>
            <Button variant="outline" onClick={() => onOpenChange(false)}>
              Cancel
            </Button>
            <Button
              variant="destructive"
              onClick={() => setDeleteOpen(true)}
              className="ml-auto"
            >
              Delete
            </Button>
          </div>
        </div>

        <AlertDialog open={deleteOpen} onOpenChange={setDeleteOpen}>
          <AlertDialogContent>
            <AlertDialogHeader>
              <AlertDialogTitle>Delete task?</AlertDialogTitle>
              <AlertDialogDescription>
                This permanently deletes &quot;{task.title}&quot;.
              </AlertDialogDescription>
            </AlertDialogHeader>
            <AlertDialogFooter>
              <AlertDialogCancel disabled={deleting}>Cancel</AlertDialogCancel>
              <AlertDialogAction
                onClick={(event) => {
                  event.preventDefault();
                  handleDelete();
                }}
                disabled={deleting}
                className="bg-destructive text-destructive-foreground hover:bg-destructive/90"
              >
                {deleting ? 'Deleting...' : 'Delete'}
              </AlertDialogAction>
            </AlertDialogFooter>
          </AlertDialogContent>
        </AlertDialog>
      </SheetContent>
    </Sheet>
  );
}