"use client";

import { useState, useRef } from "react";
import { ChevronRight, Maximize2, Minimize2, X as XIcon, UserMinus } from "lucide-react";
import { useQuery } from "@tanstack/react-query";
import { useCreateProject } from "@multica/core/projects/mutations";
import {
  PROJECT_STATUS_CONFIG,
  PROJECT_STATUS_ORDER,
  PROJECT_PRIORITY_CONFIG,
  PROJECT_PRIORITY_ORDER,
} from "@multica/core/projects/config";
import { useWorkspaceId } from "@multica/core/hooks";
import { useCurrentWorkspace, useWorkspacePaths } from "@multica/core/paths";
import { memberListOptions, agentListOptions } from "@multica/core/workspace/queries";
import { useActorName } from "@multica/core/workspace/hooks";
import type { ProjectStatus, ProjectPriority } from "@multica/core/types";
import { cn } from "@multica/ui/lib/utils";
import { toast } from "sonner";
import { Dialog, DialogContent, DialogTitle } from "@multica/ui/components/ui/dialog";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuTrigger,
} from "@multica/ui/components/ui/dropdown-menu";
import { Popover, PopoverTrigger, PopoverContent } from "@multica/ui/components/ui/popover";
import { Tooltip, TooltipTrigger, TooltipContent } from "@multica/ui/components/ui/tooltip";
import { Button } from "@multica/ui/components/ui/button";
import { EmojiPicker } from "@multica/ui/components/common/emoji-picker";
import { ContentEditor, type ContentEditorRef, TitleEditor } from "../editor";
import { PriorityIcon } from "../issues/components/priority-icon";
import { ActorAvatar } from "../common/actor-avatar";
import { useNavigation } from "../navigation";

function PillButton({
  children,
  className,
  ...props
}: React.ButtonHTMLAttributes<HTMLButtonElement>) {
  return (
    <button
      type="button"
      className={cn(
        "inline-flex items-center gap-1.5 rounded-full border px-2.5 py-1 text-xs",
        "hover:bg-accent/60 transition-colors cursor-pointer",
        className,
      )}
      {...props}
    >
      {children}
    </button>
  );
}

export function CreateProjectModal({ onClose }: { onClose: () => void }) {
  const router = useNavigation();
  const workspace = useCurrentWorkspace();
  const workspaceName = workspace?.name;
  const wsPaths = useWorkspacePaths();
  const wsId = useWorkspaceId();
  const { data: members = [] } = useQuery(memberListOptions(wsId));
  const { data: agents = [] } = useQuery(agentListOptions(wsId));
  const { getActorName } = useActorName();

  const [title, setTitle] = useState("");
  const descEditorRef = useRef<ContentEditorRef>(null);
  const [status, setStatus] = useState<ProjectStatus>("planned");
  const [priority, setPriority] = useState<ProjectPriority>("none");
  const [leadType, setLeadType] = useState<"member" | "agent" | undefined>();
  const [leadId, setLeadId] = useState<string | undefined>();
  const [icon, setIcon] = useState<string | undefined>();
  const [iconPickerOpen, setIconPickerOpen] = useState(false);
  const [submitting, setSubmitting] = useState(false);
  const [isExpanded, setIsExpanded] = useState(false);

  const [leadOpen, setLeadOpen] = useState(false);
  const [leadFilter, setLeadFilter] = useState("");

  const leadQuery = leadFilter.toLowerCase();
  const filteredMembers = members.filter((m) => m.name.toLowerCase().includes(leadQuery));
  const filteredAgents = agents.filter(
    (a) => !a.archived_at && a.name.toLowerCase().includes(leadQuery),
  );

  const leadLabel = leadType && leadId ? getActorName(leadType, leadId) : "Lead";

  const createProject = useCreateProject();

  const handleSubmit = async () => {
    if (!title.trim() || submitting) return;
    setSubmitting(true);
    try {
      const project = await createProject.mutateAsync({
        title: title.trim(),
        description: descEditorRef.current?.getMarkdown()?.trim() || undefined,
        icon,
        status,
        priority,
        lead_type: leadType,
        lead_id: leadId,
      });
      onClose();
      toast.success("Project created");
      router.push(wsPaths.projectDetail(project.id));
    } catch {
      toast.error("Failed to create project");
    } finally {
      setSubmitting(false);
    }
  };

  return (
    <Dialog open onOpenChange={(v) => { if (!v) onClose(); }}>
      <DialogContent
        showCloseButton={false}
        className={cn(
          "p-0 gap-0 flex flex-col overflow-hidden",
          "!top-1/2 !left-1/2 !-translate-x-1/2",
          "!transition-all !duration-300 !ease-out",
          isExpanded
            ? "!max-w-4xl !w-full !h-5/6 !-translate-y-1/2"
            : "!max-w-2xl !w-full !h-96 !-translate-y-1/2",
        )}
      >
        <DialogTitle className="sr-only">New Project</DialogTitle>

        <div className="flex items-center justify-between px-5 pt-3 pb-2 shrink-0">
          <div className="flex items-center gap-1.5 text-xs">
            <span className="text-muted-foreground">{workspaceName}</span>
            <ChevronRight className="size-3 text-muted-foreground/50" />
            <span className="font-medium">New project</span>
          </div>
          <div className="flex items-center gap-1">
            <Tooltip>
              <TooltipTrigger
                render={
                  <button
                    onClick={() => setIsExpanded(!isExpanded)}
                    className="rounded-sm p-1.5 opacity-70 hover:opacity-100 hover:bg-accent/60 transition-all cursor-pointer"
                  >
                    {isExpanded ? <Minimize2 className="size-4" /> : <Maximize2 className="size-4" />}
                  </button>
                }
              />
              <TooltipContent side="bottom">{isExpanded ? "Collapse" : "Expand"}</TooltipContent>
            </Tooltip>
            <Tooltip>
              <TooltipTrigger
                render={
                  <button
                    onClick={onClose}
                    className="rounded-sm p-1.5 opacity-70 hover:opacity-100 hover:bg-accent/60 transition-all cursor-pointer"
                  >
                    <XIcon className="size-4" />
                  </button>
                }
              />
              <TooltipContent side="bottom">Close</TooltipContent>
            </Tooltip>
          </div>
        </div>

        <div className="px-5 pb-2 shrink-0">
          <Popover open={iconPickerOpen} onOpenChange={setIconPickerOpen}>
            <PopoverTrigger
              render={
                <button
                  type="button"
                  className="text-2xl cursor-pointer rounded-lg p-1 -ml-1 hover:bg-accent/60 transition-colors"
                  title="Choose icon"
                >
                  {icon || "📁"}
                </button>
              }
            />
            <PopoverContent align="start" className="w-auto p-0">
              <EmojiPicker
                onSelect={(emoji) => {
                  setIcon(emoji);
                  setIconPickerOpen(false);
                }}
              />
            </PopoverContent>
          </Popover>
          <TitleEditor
            autoFocus
            defaultValue=""
            placeholder="Project title"
            className="text-lg font-semibold"
            onChange={(v) => setTitle(v)}
            onSubmit={handleSubmit}
          />
        </div>

        <div className="flex-1 min-h-0 overflow-y-auto px-5">
          <ContentEditor
            ref={descEditorRef}
            defaultValue=""
            placeholder="Add description..."
            debounceMs={500}
          />
        </div>

        <div className="flex items-center gap-1.5 px-4 py-2 shrink-0 flex-wrap">
          <DropdownMenu>
            <DropdownMenuTrigger
              render={
                <PillButton>
                  <span className={cn("size-2 rounded-full", PROJECT_STATUS_CONFIG[status].dotColor)} />
                  <span>{PROJECT_STATUS_CONFIG[status].label}</span>
                </PillButton>
              }
            />
            <DropdownMenuContent align="start" className="w-44">
              {PROJECT_STATUS_ORDER.map((s) => (
                <DropdownMenuItem key={s} onClick={() => setStatus(s)}>
                  <span className={cn("size-2 rounded-full", PROJECT_STATUS_CONFIG[s].dotColor)} />
                  <span>{PROJECT_STATUS_CONFIG[s].label}</span>
                </DropdownMenuItem>
              ))}
            </DropdownMenuContent>
          </DropdownMenu>

          <DropdownMenu>
            <DropdownMenuTrigger
              render={
                <PillButton>
                  <PriorityIcon priority={priority} />
                  <span>{PROJECT_PRIORITY_CONFIG[priority].label}</span>
                </PillButton>
              }
            />
            <DropdownMenuContent align="start" className="w-44">
              {PROJECT_PRIORITY_ORDER.map((pr) => (
                <DropdownMenuItem key={pr} onClick={() => setPriority(pr)}>
                  <PriorityIcon priority={pr} />
                  <span>{PROJECT_PRIORITY_CONFIG[pr].label}</span>
                </DropdownMenuItem>
              ))}
            </DropdownMenuContent>
          </DropdownMenu>

          <Popover
            open={leadOpen}
            onOpenChange={(v) => {
              setLeadOpen(v);
              if (!v) setLeadFilter("");
            }}
          >
            <PopoverTrigger
              render={
                <PillButton>
                  {leadType && leadId ? (
                    <>
                      <ActorAvatar actorType={leadType} actorId={leadId} size={16} />
                      <span>{leadLabel}</span>
                    </>
                  ) : (
                    <span className="text-muted-foreground">Lead</span>
                  )}
                </PillButton>
              }
            />
            <PopoverContent align="start" className="w-52 p-0">
              <div className="px-2 py-1.5 border-b">
                <input
                  type="text"
                  value={leadFilter}
                  onChange={(e) => setLeadFilter(e.target.value)}
                  placeholder="Assign lead..."
                  className="w-full bg-transparent text-sm placeholder:text-muted-foreground outline-none"
                />
              </div>
              <div className="p-1 max-h-60 overflow-y-auto">
                <button
                  type="button"
                  onClick={() => {
                    setLeadType(undefined);
                    setLeadId(undefined);
                    setLeadOpen(false);
                  }}
                  className="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm hover:bg-accent transition-colors"
                >
                  <UserMinus className="h-3.5 w-3.5 text-muted-foreground" />
                  <span className="text-muted-foreground">No lead</span>
                </button>
                {filteredMembers.length > 0 && (
                  <>
                    <div className="px-2 pt-2 pb-1 text-xs font-medium text-muted-foreground uppercase tracking-wider">
                      Members
                    </div>
                    {filteredMembers.map((m) => (
                      <button
                        type="button"
                        key={m.user_id}
                        onClick={() => {
                          setLeadType("member");
                          setLeadId(m.user_id);
                          setLeadOpen(false);
                        }}
                        className="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm hover:bg-accent transition-colors"
                      >
                        <ActorAvatar actorType="member" actorId={m.user_id} size={16} />
                        <span>{m.name}</span>
                      </button>
                    ))}
                  </>
                )}
                {filteredAgents.length > 0 && (
                  <>
                    <div className="px-2 pt-2 pb-1 text-xs font-medium text-muted-foreground uppercase tracking-wider">
                      Agents
                    </div>
                    {filteredAgents.map((a) => (
                      <button
                        type="button"
                        key={a.id}
                        onClick={() => {
                          setLeadType("agent");
                          setLeadId(a.id);
                          setLeadOpen(false);
                        }}
                        className="flex w-full items-center gap-2 rounded-md px-2 py-1.5 text-sm hover:bg-accent transition-colors"
                      >
                        <ActorAvatar actorType="agent" actorId={a.id} size={16} />
                        <span>{a.name}</span>
                      </button>
                    ))}
                  </>
                )}
                {filteredMembers.length === 0 &&
                  filteredAgents.length === 0 &&
                  leadFilter && (
                    <div className="px-2 py-3 text-center text-sm text-muted-foreground">
                      No results
                    </div>
                  )}
              </div>
            </PopoverContent>
          </Popover>
        </div>

        <div className="flex items-center justify-end px-4 py-3 border-t shrink-0">
          <Button size="sm" onClick={handleSubmit} disabled={!title.trim() || submitting}>
            {submitting ? "Creating..." : "Create Project"}
          </Button>
        </div>
      </DialogContent>
    </Dialog>
  );
}