"use client";

import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { z } from "zod";
import { Button } from "@/components/ui/button";
import { Card, CardContent } from "@/components/ui/card";
import {
  Form,
  FormField,
  FormItem,
  FormControl,
  FormMessage,
} from "@/components/ui/form";
import { Textarea } from "@/components/ui/textarea";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { CreateThoughtSchema, type Me } from "@/lib/api";
import { useAuth } from "@/hooks/use-auth";
import { toast } from "sonner";
import { Globe, Lock, Users } from "lucide-react";
import { useState } from "react";
import { Confetti } from "./confetti";
import { createThought } from "@/app/actions/thoughts";

const DEFAULT_MOODS = [
  "relaxed 😌",
  "happy 😊",
  "excited 🤩",
  "grateful 🙏",
  "inspired ✨",
  "thoughtful 🤔",
  "curious 🧐",
  "amused 😄",
  "proud 💪",
  "hopeful 🌟",
  "tired 😴",
  "stressed 😰",
  "anxious 😟",
  "sad 😢",
  "frustrated 😤",
  "angry 😠",
  "bored 😑",
  "confused 😕",
  "nostalgic 🥹",
  "silly 🤪",
];

interface ThoughtFormProps {
  /** Set to the parent thought ID when composing a reply. */
  replyToId?: string;
  /** Called after successful submit (e.g. close the reply panel). */
  onSuccess?: () => void;
  /** Whether to wrap in a Card. Defaults to true when no replyToId. */
  card?: boolean;
  currentUser?: Me | null;
}

export function ThoughtForm({
  replyToId,
  onSuccess,
  card = !replyToId,
  currentUser,
}: ThoughtFormProps) {
  const { token } = useAuth();
  const [showConfetti, setShowConfetti] = useState(false);

  const allMoods = [
    ...DEFAULT_MOODS,
    ...(currentUser?.customMoods ?? [])
      .filter(
        (m) =>
          !DEFAULT_MOODS.some((d) =>
            d.toLowerCase().startsWith(m.name.toLowerCase()),
          ),
      )
      .map((m) => `${m.name} ${m.value}`),
  ];

  const form = useForm<z.infer<typeof CreateThoughtSchema>>({
    resolver: zodResolver(CreateThoughtSchema),
    defaultValues: {
      content: "",
      visibility: "public",
      ...(replyToId ? { inReplyToId: replyToId } : {}),
    },
  });

  async function onSubmit(values: z.infer<typeof CreateThoughtSchema>) {
    if (!token) {
      toast.error("You must be logged in.");
      return;
    }
    try {
      await createThought(values);
      toast.success(replyToId ? "Reply posted!" : "Thought posted!");
      setShowConfetti(true);
      form.reset();
      onSuccess?.();
    } catch {
      toast.error(
        replyToId ? "Failed to post reply." : "Failed to post thought.",
      );
    }
  }

  const inner = (
    <Form {...form}>
      <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-4">
        <FormField
          control={form.control}
          name="content"
          render={({ field }) => (
            <FormItem>
              <FormControl>
                <Textarea
                  placeholder={
                    replyToId ? "Post your reply..." : "What's on your mind?"
                  }
                  className={`resize-none ${replyToId ? "bg-white shadow-fa-sm" : ""}`}
                  {...field}
                />
              </FormControl>
              <FormMessage />
            </FormItem>
          )}
        />
        <div
          className={`flex ${replyToId ? "justify-end gap-2" : "justify-between items-center"}`}
        >
          <div className="flex gap-2 flex-col md:flex-row">
            {!replyToId && (
              <FormField
                control={form.control}
                name="visibility"
                render={({ field }) => (
                  <Select
                    onValueChange={field.onChange}
                    defaultValue={field.value}
                  >
                    <FormControl>
                      <SelectTrigger className="w-[170px]">
                        <SelectValue placeholder="Visibility" />
                      </SelectTrigger>
                    </FormControl>
                    <SelectContent>
                      <SelectItem value="public">
                        <div className="flex items-center gap-2">
                          <Globe className="h-4 w-4" /> Public
                        </div>
                      </SelectItem>
                      <SelectItem value="followers">
                        <div className="flex items-center gap-2">
                          <Users className="h-4 w-4" /> Followers
                        </div>
                      </SelectItem>
                      <SelectItem value="unlisted">
                        <div className="flex items-center gap-2">
                          <Lock className="h-4 w-4" /> Unlisted
                        </div>
                      </SelectItem>
                      <SelectItem value="direct">
                        <div className="flex items-center gap-2">
                          <Lock className="h-4 w-4" /> Direct
                        </div>
                      </SelectItem>
                    </SelectContent>
                  </Select>
                )}
              />
            )}
            <FormField
              control={form.control}
              name="mood"
              render={({ field }) => (
                <Select
                  onValueChange={(v) =>
                    field.onChange(v === "__none__" ? undefined : v)
                  }
                  value={field.value ?? "__none__"}
                >
                  <FormControl>
                    <SelectTrigger className="w-[170px]">
                      <SelectValue placeholder="How are you feeling?" />
                    </SelectTrigger>
                  </FormControl>
                  <SelectContent>
                    <SelectItem value="__none__">No mood</SelectItem>
                    {allMoods.map((mood) => (
                      <SelectItem key={mood} value={mood}>
                        {mood}
                      </SelectItem>
                    ))}
                  </SelectContent>
                </Select>
              )}
            />
            {replyToId && (
              <Button
                type="button"
                variant="ghost"
                onClick={() => onSuccess?.()}
              >
                Cancel
              </Button>
            )}
          </div>
          <Button type="submit" disabled={form.formState.isSubmitting}>
            {form.formState.isSubmitting
              ? replyToId
                ? "Replying..."
                : "Posting..."
              : replyToId
                ? "Reply"
                : "Post Thought"}
          </Button>
        </div>
      </form>
    </Form>
  );

  return (
    <>
      <Confetti fire={showConfetti} onComplete={() => setShowConfetti(false)} />
      {card ? (
        <Card>
          <CardContent className="p-4">{inner}</CardContent>
        </Card>
      ) : (
        <div className="space-y-2 p-4">{inner}</div>
      )}
    </>
  );
}