"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import { ReactNode } from "react";
import { VIBNSidebar } from "./vibn-sidebar";
import { Toaster } from "sonner";

interface ProjectShellProps {
  children: ReactNode;
  workspace: string;
  projectId: string;
  projectName: string;
  projectDescription?: string;
  projectStatus?: string;
  projectProgress?: number;
  discoveryPhase?: number;
  capturedData?: Record<string, string>;
  createdAt?: string;
  updatedAt?: string;
  featureCount?: number;
  creationMode?: "fresh" | "chat-import" | "code-import" | "migration";
}

const ALL_TABS = [
  { id: "overview",   label: "Atlas",     path: "overview" },
  { id: "prd",        label: "PRD",       path: "prd" },
  { id: "build",      label: "Build",     path: "build" },
  { id: "growth",     label: "Growth",    path: "growth" },
  { id: "assist",     label: "Assist",    path: "assist" },
  { id: "analytics",  label: "Analytics", path: "analytics" },
];

function getTabsForMode(
  mode: "fresh" | "chat-import" | "code-import" | "migration" = "fresh"
) {
  switch (mode) {
    case "code-import":
      return ALL_TABS.filter(t => t.id !== "prd");
    case "migration":
      return ALL_TABS
        .filter(t => t.id !== "prd")
        .map(t => t.id === "overview" ? { ...t, label: "Migration Plan" } : t);
    default:
      return ALL_TABS;
  }
}

export function ProjectShell({
  children,
  workspace,
  projectId,
  creationMode,
}: ProjectShellProps) {
  const pathname = usePathname();
  const TABS = getTabsForMode(creationMode);
  const activeTab = TABS.find(t => pathname?.includes(`/${t.path}`))?.id ?? "overview";

  return (
    <>
      <style>{`
        @media (max-width: 768px) {
          .vibn-left-sidebar { display: none !important; }
          .vibn-tab-bar      { overflow-x: auto; -webkit-overflow-scrolling: touch; }
          .vibn-tab-bar a    { padding: 10px 14px !important; font-size: 0.75rem !important; }
          .vibn-page-content { padding-bottom: env(safe-area-inset-bottom); }
        }
        @media (max-width: 480px) {
          .vibn-tab-bar a    { padding: 10px 10px !important; }
        }
      `}</style>

      <div style={{ display: "flex", height: "100dvh", background: "#f6f4f0", overflow: "hidden" }}>

        {/* Left sidebar */}
        <div className="vibn-left-sidebar" style={{ display: "flex" }}>
          <VIBNSidebar workspace={workspace} />
        </div>

        {/* Main column — full width */}
        <div style={{ flex: 1, display: "flex", flexDirection: "column", minWidth: 0 }}>

          {/* Tab bar — sits at the top, no header above it */}
          <div className="vibn-tab-bar" style={{
            padding: "0 24px",
            borderBottom: "1px solid #e8e4dc",
            display: "flex",
            background: "#fff",
            flexShrink: 0,
          }}>
            {TABS.map(t => (
              <Link
                key={t.id}
                href={`/${workspace}/project/${projectId}/${t.path}`}
                style={{
                  padding: "13px 16px",
                  fontSize: "0.8rem",
                  fontWeight: 500,
                  color: activeTab === t.id ? "#1a1a1a" : "#a09a90",
                  borderBottom: activeTab === t.id ? "2px solid #1a1a1a" : "2px solid transparent",
                  transition: "color 0.12s",
                  fontFamily: "Outfit, sans-serif",
                  textDecoration: "none",
                  display: "block",
                  whiteSpace: "nowrap",
                }}
                onMouseEnter={e => { if (activeTab !== t.id) (e.currentTarget as HTMLElement).style.color = "#6b6560"; }}
                onMouseLeave={e => { if (activeTab !== t.id) (e.currentTarget as HTMLElement).style.color = "#a09a90"; }}
              >
                {t.label}
              </Link>
            ))}
          </div>

          {/* Page content — full width, each page manages its own layout */}
          <div className="vibn-page-content" style={{ flex: 1, overflow: "auto" }}>
            {children}
          </div>
        </div>
      </div>

      <Toaster position="top-center" />
    </>
  );
}