'use client';

import { useState, useEffect } from 'react';
import { Button } from '@/components/ui/button';
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogFooter,
  DialogHeader,
  DialogTitle,
} from '@/components/ui/dialog';
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 { toast } from 'sonner';

interface TaskCreateDialogProps {
  open: boolean;
  onOpenChange: (open: boolean) => void;
  domainId: string;
  defaultStatus?: 'todo' | 'in_progress' | 'done' | 'cancelled';
  onCreated: () => void;
}

export function TaskCreateDialog({
  open,
  onOpenChange,
  domainId,
  defaultStatus = 'todo',
  onCreated,
}: TaskCreateDialogProps) {
  const [title, setTitle] = useState('');
  const [description, setDescription] = useState('');
  const [status, setStatus] = useState(defaultStatus);
  const [priority, setPriority] = useState<'low' | 'medium' | 'high' | 'urgent'>('medium');
  const [dueDate, setDueDate] = useState('');
  const [estimatedMinutes, setEstimatedMinutes] = useState('');
  const [submitting, setSubmitting] = useState(false);
  const [error, setError] = useState('');

  // Reset form when dialog opens
  useEffect(() => {
    if (open) {
      setTitle('');
      setDescription('');
      setStatus(defaultStatus);
      setPriority('medium');
      setDueDate('');
      setEstimatedMinutes('');
      setError('');
    }
  }, [open, defaultStatus]);

  async function handleSubmit(event: React.FormEvent<HTMLFormElement>) {
    event.preventDefault();
    if (!domainId) {
      setError('No domain selected');
      return;
    }
    setSubmitting(true);
    setError('');

    const body: Record<string, unknown> = {
      title,
      status,
      priority,
    };
    if (description) body.description = description;
    if (dueDate) body.dueDate = new Date(dueDate).toISOString();
    if (estimatedMinutes) body.estimatedMinutes = parseInt(estimatedMinutes, 10);

    try {
      const response = await fetch(`/api/domains/${domainId}/tasks`, {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify(body),
      });

      if (!response.ok) {
        const err = await response.json();
        throw new Error(err.error?.message || 'Unable to create task');
      }

      toast.success('Task created');
      onOpenChange(false);
      onCreated();
    } catch (err) {
      setError(err instanceof Error ? err.message : 'Unable to create task');
    } finally {
      setSubmitting(false);
    }
  }

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="sm:max-w-[500px]">
        <DialogHeader>
          <DialogTitle>New Task</DialogTitle>
          <DialogDescription>Create a new task to track your work.</DialogDescription>
        </DialogHeader>
        <form className="space-y-4" onSubmit={handleSubmit}>
          <div className="space-y-2">
            <Label htmlFor="task-title">Title *</Label>
            <Input
              id="task-title"
              value={title}
              onChange={(e) => setTitle(e.target.value)}
              placeholder="What needs to be done?"
              autoFocus
              required
            />
          </div>

          <div className="space-y-2">
            <Label htmlFor="task-description">Description</Label>
            <Textarea
              id="task-description"
              value={description}
              onChange={(e) => setDescription(e.target.value)}
              placeholder="Add details..."
              rows={3}
            />
          </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 any)}>
                <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>
                  <SelectItem value="cancelled">Cancelled</SelectItem>
                </SelectContent>
              </Select>
            </div>

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

            <div className="space-y-2">
              <Label htmlFor="task-estimate">Est. Minutes</Label>
              <Input
                id="task-estimate"
                type="number"
                min={1}
                value={estimatedMinutes}
                onChange={(e) => setEstimatedMinutes(e.target.value)}
                placeholder="e.g. 30"
              />
            </div>
          </div>

          {error && <p className="text-sm text-destructive" role="alert">{error}</p>}

          <DialogFooter>
            <Button type="button" variant="outline" onClick={() => onOpenChange(false)}>
              Cancel
            </Button>
            <Button type="submit" disabled={submitting || !title || !domainId}>
              {submitting ? 'Creating...' : 'Create Task'}
            </Button>
          </DialogFooter>
        </form>
      </DialogContent>
    </Dialog>
  );
}