"use client";

import React, { useEffect, useState } from "react";
import { useParams, useRouter } from "next/navigation";
import { Button, Badge, RenderAppBreadcrumb } from "ikoncomponents";
import { Pencil, CalendarDays, UserRound, Building2, Hash } from "lucide-react";

import { getProjectByIdentifierApi } from "@/app/utils/api/projectApi";
import { useAppCache } from "@/app/utils/context/AppCacheContext";
import { Project } from "../types/project";

export default function ProjectDetailsLayout({
  children,
}: {
  children: React.ReactNode;
}) {
  const router = useRouter();
  const { projectIdentifier } = useParams();

  // Resolves the project manager UUID to a display name.
  const { userNameMap } = useAppCache();

  const [project, setProject] = useState<Project | null>(null);

  useEffect(() => {
    if (!projectIdentifier) return;
    let active = true;
    getProjectByIdentifierApi(projectIdentifier as string)
      .then((data) => {
        if (active) setProject(data);
      })
      .catch((error) => console.error("Failed to load project", error));
    return () => {
      active = false;
    };
  }, [projectIdentifier]);

  const managerName = project?.projectManager
    ? userNameMap.get(project.projectManager) ?? "—"
    : "—";

  const startDate =
    project?.contractedStartDate || project?.projectStartDate || "—";

  // Initials for the avatar tile (first letter of up to two name words).
  const initials =
    (project?.projectName || "")
      .split(" ")
      .filter(Boolean)
      .slice(0, 2)
      .map((word) => word[0])
      .join("")
      .toUpperCase() || "—";

  // Map a status to a badge style so the state reads at a glance.
  const statusVariant = (() => {
    switch (project?.projectStatus?.toLowerCase()) {
      case "completed":
        return "verified" as const;
      case "active":
      case "ongoing":
        return "default" as const;
      default:
        return "secondary" as const;
    }
  })();

  const handleEdit = () => {
    router.push(`/main/planning/projects/${projectIdentifier}?mode=edit`);
  };

  return (
    <div className="min-h-screen bg-background text-foreground mt-2 gap-4">
      {/* App-bar breadcrumb (same mechanism as the FX Rate page). The sidebar
          shell sets level 1 ("Projects"); this registers the project name at
          level 2 and updates once the project has loaded. */}
      

      <div className="relative flex flex-col gap-6 overflow-hidden rounded-xl border bg-card p-0 shadow-sm">
        {/* Top accent bar */}
        <div className="h-1 w-full bg-accent" />

        <div className="p-5 sm:p-6">
          {/* Title row: avatar + name/subtitle + edit */}
          <div className="flex flex-col gap-4 sm:flex-row sm:items-center sm:justify-between">
            <div className="flex items-center gap-4">
              {/* Avatar tile */}
              <div className="flex h-14 w-14 shrink-0 items-center justify-center rounded-xl bg-foreground text-lg font-semibold text-background">
                {initials}
              </div>

              <div className="space-y-1">
                <div className="flex items-center gap-3">
                  <h1 className="text-2xl font-bold leading-tight">
                    {project?.projectName ?? "—"}
                  </h1>
                  <Badge variant={statusVariant}>
                    {project?.projectStatus ?? "—"}
                  </Badge>
                </div>

                <div className="flex items-center gap-1.5 text-sm text-muted-foreground">
                  <Hash className="h-3.5 w-3.5 shrink-0" />
                  <span className="truncate">{projectIdentifier}</span>
                </div>
              </div>
            </div>

            <div className="flex shrink-0 items-center justify-end gap-2">
              <Button
                variant="outline"
                size="sm"
                onClick={handleEdit}
                className="flex items-center gap-2"
              >
                <Pencil className="h-4 w-4" />
                Edit Project
              </Button>
            </div>
          </div>

          {/* Divider */}
          <div className="my-5 border-t" />

          {/* Meta row: icon-tiled fields */}
          <div className="grid gap-6 sm:grid-cols-2 lg:grid-cols-3">
            <div className="flex items-center gap-3">
              <div className="flex h-9 w-9 shrink-0 items-center justify-center rounded-lg bg-muted text-muted-foreground">
                <UserRound className="h-4 w-4" />
              </div>
              <div className="min-w-0">
                <p className="text-[11px] font-medium uppercase tracking-wider text-muted-foreground">
                  Project Manager
                </p>
                <p className="truncate text-sm font-semibold text-foreground">
                  {managerName}
                </p>
              </div>
            </div>

            <div className="flex items-center gap-3">
              <div className="flex h-9 w-9 shrink-0 items-center justify-center rounded-lg bg-muted text-muted-foreground">
                <Building2 className="h-4 w-4" />
              </div>
              <div className="min-w-0">
                <p className="text-[11px] font-medium uppercase tracking-wider text-muted-foreground">
                  Client
                </p>
                <p className="truncate text-sm font-semibold text-foreground">
                  {project?.accountName || "—"}
                </p>
              </div>
            </div>

            <div className="flex items-center gap-3">
              <div className="flex h-9 w-9 shrink-0 items-center justify-center rounded-lg bg-muted text-muted-foreground">
                <CalendarDays className="h-4 w-4" />
              </div>
              <div className="min-w-0">
                <p className="text-[11px] font-medium uppercase tracking-wider text-muted-foreground">
                  Start Date
                </p>
                <p className="truncate text-sm font-semibold text-foreground">
                  {startDate}
                </p>
              </div>
            </div>
          </div>
        </div>
      </div>

      {/* ================= MAIN CONTENT ================= */}
      <main className=" py-6">{children}</main>
    </div>
  );
}