import { permissions } from "@mrp/shared";
import type { ProjectMilestoneStatus, WorkOrderSummaryDto } from "@mrp/shared";
import type { ProjectDetailDto } from "@mrp/shared/dist/projects/types.js";
import type { SalesOrderPlanningDto } from "@mrp/shared/dist/sales/types.js";
import { useEffect, useState } from "react";
import { Link, useParams } from "react-router-dom";

import { useAuth } from "../../auth/AuthProvider";
import { FileAttachmentsPanel } from "../../components/FileAttachmentsPanel";
import { api, ApiError } from "../../lib/api";
import { projectMilestoneStatusPalette } from "./config";
import { ProjectPriorityBadge } from "./ProjectPriorityBadge";
import { ProjectStatusBadge } from "./ProjectStatusBadge";

function formatCurrency(value: number | null) {
  return value === null ? "Not linked" : `$${value.toFixed(2)}`;
}

export function ProjectDetailPage() {
  const { token, user } = useAuth();
  const { projectId } = useParams();
  const [project, setProject] = useState<ProjectDetailDto | null>(null);
  const [workOrders, setWorkOrders] = useState<WorkOrderSummaryDto[]>([]);
  const [planning, setPlanning] = useState<SalesOrderPlanningDto | null>(null);
  const [status, setStatus] = useState("Loading project...");
  const [updatingMilestoneId, setUpdatingMilestoneId] = useState<string | null>(null);

  const canManage = user?.permissions.includes(permissions.projectsWrite) ?? false;

  useEffect(() => {
    if (!token || !projectId) {
      return;
    }

    api.getProject(token, projectId)
      .then(async (nextProject) => {
        setProject(nextProject);
        setStatus("Project loaded.");
        const [nextPlanning, nextWorkOrders] = await Promise.all([
          nextProject.salesOrderId ? api.getSalesOrderPlanning(token, nextProject.salesOrderId).catch(() => null) : Promise.resolve(null),
          api.getWorkOrders(token, { projectId: nextProject.id }),
        ]);

        setPlanning(nextPlanning);
        setWorkOrders(nextWorkOrders);
      })
      .catch((error: unknown) => {
        const message = error instanceof ApiError ? error.message : "Unable to load project.";
        setStatus(message);
      });
  }, [projectId, token]);

  if (!project) {
    return <div className="surface-panel text-sm text-muted">{status}</div>;
  }

  const sortedMilestones = [...project.milestones].sort((left, right) => {
    if (left.status === "COMPLETE" && right.status !== "COMPLETE") {
      return 1;
    }
    if (left.status !== "COMPLETE" && right.status === "COMPLETE") {
      return -1;
    }

    if (left.dueDate && right.dueDate) {
      return new Date(left.dueDate).getTime() - new Date(right.dueDate).getTime();
    }
    if (left.dueDate) {
      return -1;
    }
    if (right.dueDate) {
      return 1;
    }

    return left.sortOrder - right.sortOrder;
  });

  const nextMilestone = sortedMilestones.find((milestone) => milestone.status !== "COMPLETE") ?? null;
  const activeWorkOrders = workOrders.filter(
    (workOrder) => workOrder.status === "RELEASED" || workOrder.status === "IN_PROGRESS" || workOrder.status === "ON_HOLD"
  );
  const nextWorkOrder = [...activeWorkOrders]
    .sort((left, right) => {
      if (left.dueDate && right.dueDate) {
        return new Date(left.dueDate).getTime() - new Date(right.dueDate).getTime();
      }
      if (left.dueDate) {
        return -1;
      }
      if (right.dueDate) {
        return 1;
      }

      return left.workOrderNumber.localeCompare(right.workOrderNumber);
    })[0] ?? null;
  const materialExceptionItems = planning
    ? planning.items.filter((item) => item.uncoveredQuantity > 0 || item.recommendedBuildQuantity > 0 || item.recommendedPurchaseQuantity > 0).slice(0, 5)
    : [];
  const topBuildRecommendation = planning?.items.find((item) => item.recommendedBuildQuantity > 0) ?? null;
  const topPurchaseRecommendation = planning?.items.find((item) => item.recommendedPurchaseQuantity > 0) ?? null;
  const completionPercent = project.rollups.milestoneCount > 0
    ? Math.round((project.rollups.completedMilestoneCount / project.rollups.milestoneCount) * 100)
    : 0;
  const readinessScore = project.cockpit.risk.readinessScore;
  const riskTone = project.cockpit.risk.riskLevel === "LOW"
    ? "text-emerald-600 dark:text-emerald-300"
    : project.cockpit.risk.riskLevel === "MEDIUM"
      ? "text-amber-600 dark:text-amber-300"
      : "text-rose-600 dark:text-rose-300";

  async function updateMilestoneStatus(milestoneId: string, nextStatus: ProjectMilestoneStatus) {
    if (!token || !project) {
      return;
    }

    setUpdatingMilestoneId(milestoneId);
    setStatus("Updating milestone status...");
    try {
      const nextProject = await api.updateProjectMilestoneStatus(token, project.id, milestoneId, { status: nextStatus });
      setProject(nextProject);
      setStatus("Milestone status updated.");
    } catch (error: unknown) {
      const message = error instanceof ApiError ? error.message : "Unable to update milestone status.";
      setStatus(message);
    } finally {
      setUpdatingMilestoneId(null);
    }
  }

  function milestoneQuickActions(currentStatus: ProjectMilestoneStatus) {
    if (currentStatus === "PLANNED") {
      return [
        { status: "IN_PROGRESS" as const, label: "Start" },
        { status: "BLOCKED" as const, label: "Block" },
        { status: "COMPLETE" as const, label: "Complete" },
      ];
    }
    if (currentStatus === "IN_PROGRESS") {
      return [
        { status: "BLOCKED" as const, label: "Block" },
        { status: "COMPLETE" as const, label: "Complete" },
        { status: "PLANNED" as const, label: "Reset" },
      ];
    }
    if (currentStatus === "BLOCKED") {
      return [
        { status: "IN_PROGRESS" as const, label: "Resume" },
        { status: "COMPLETE" as const, label: "Complete" },
        { status: "PLANNED" as const, label: "Reset" },
      ];
    }
    return [{ status: "IN_PROGRESS" as const, label: "Reopen" }];
  }

  return (
    <section className="page-stack">
      <div className="surface-panel">
        <div className="flex flex-col gap-3 lg:flex-row lg:items-start lg:justify-between">
          <div>
            <p className="section-kicker">PROJECT</p>
            <h3 className="module-title">{project.projectNumber}</h3>
            <p className="mt-1 text-sm text-text">{project.name}</p>
            <div className="mt-2.5 flex flex-wrap gap-2">
              <ProjectStatusBadge status={project.status} />
              <ProjectPriorityBadge priority={project.priority} />
            </div>
          </div>
          <div className="flex flex-wrap gap-3">
            <Link to="/projects" className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">Back to projects</Link>
            {canManage ? <Link to={`/projects/${project.id}/edit`} className="inline-flex items-center justify-center rounded-2xl bg-brand px-2 py-2 text-sm font-semibold text-white">Edit project</Link> : null}
          </div>
        </div>
      </div>
      <section className="grid gap-3 xl:grid-cols-4">
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Customer</p><div className="mt-1 text-base font-bold text-text">{project.customerName}</div></article>
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Owner</p><div className="mt-1 text-base font-bold text-text">{project.ownerName || "Unassigned"}</div></article>
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Due Date</p><div className="mt-1 text-base font-bold text-text">{project.dueDate ? new Date(project.dueDate).toLocaleDateString() : "Not set"}</div></article>
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Created</p><div className="mt-1 text-base font-bold text-text">{new Date(project.createdAt).toLocaleDateString()}</div></article>
      </section>
      <section className="grid gap-3 xl:grid-cols-4">
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Milestones</p><div className="mt-1 text-base font-bold text-text">{project.rollups.completedMilestoneCount}/{project.rollups.milestoneCount}</div><div className="mt-1 text-xs text-muted">{project.rollups.openMilestoneCount} open</div></article>
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Overdue Milestones</p><div className="mt-1 text-base font-bold text-text">{project.rollups.overdueMilestoneCount}</div></article>
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Linked Work Orders</p><div className="mt-1 text-base font-bold text-text">{project.rollups.workOrderCount}</div><div className="mt-1 text-xs text-muted">{project.rollups.activeWorkOrderCount} active</div></article>
        <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Overdue Work Orders</p><div className="mt-1 text-base font-bold text-text">{project.rollups.overdueWorkOrderCount}</div><div className="mt-1 text-xs text-muted">{project.rollups.completedWorkOrderCount} complete</div></article>
      </section>
      <section className="surface-panel">
        <div className="flex flex-col gap-3 lg:flex-row lg:items-start lg:justify-between">
          <div>
            <p className="section-kicker">PROJECT COCKPIT</p>
          </div>
          <div className="surface-panel-tight text-right">
            <div className="metric-kicker">Milestone Progress</div>
            <div className="mt-1 text-2xl font-bold text-text">{completionPercent}%</div>
          </div>
        </div>
        <div className="mt-3 grid gap-2.5 xl:grid-cols-4">
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Commercial</p><div className="mt-2 text-base font-bold text-text">{formatCurrency(project.cockpit.commercial.activeDocumentTotal)}</div><div className="mt-1 text-xs text-muted">{project.cockpit.commercial.activeDocumentNumber ? `${project.cockpit.commercial.activeDocumentNumber} - ${project.cockpit.commercial.activeDocumentStatus}` : "Link a quote or sales order"}</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Supply</p><div className="mt-2 text-base font-bold text-text">{planning ? planning.summary.uncoveredItemCount : project.cockpit.risk.shortageItemCount} shortage items</div><div className="mt-1 text-xs text-muted">{planning ? `Build ${planning.summary.totalBuildQuantity} - Buy ${planning.summary.totalPurchaseQuantity}` : `Uncovered qty ${project.cockpit.risk.totalUncoveredQuantity}`}</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Execution</p><div className="mt-2 text-base font-bold text-text">{project.rollups.activeWorkOrderCount} active work orders</div><div className="mt-1 text-xs text-muted">{nextWorkOrder ? `${nextWorkOrder.workOrderNumber} due ${nextWorkOrder.dueDate ? new Date(nextWorkOrder.dueDate).toLocaleDateString() : "unscheduled"}` : "No active work order due date"}</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Delivery</p><div className="mt-2 text-base font-bold text-text">{project.cockpit.delivery.shipmentStatus ? project.cockpit.delivery.shipmentStatus.replaceAll("_", " ") : "Not linked"}</div><div className="mt-1 text-xs text-muted">{project.cockpit.delivery.shipmentNumber ? `${project.cockpit.delivery.shipmentNumber} - ${project.cockpit.delivery.packageCount} package(s)` : "Link a shipment to track delivery"}</div></article>
        </div>
        <div className="mt-3 grid gap-2.5 xl:grid-cols-3">
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Purchasing Coverage</p><div className="mt-2 text-base font-bold text-text">{project.cockpit.purchasing.totalReceivedQuantity}/{project.cockpit.purchasing.totalOrderedQuantity} received</div><div className="mt-1 text-xs text-muted">{project.cockpit.purchasing.linkedPurchaseOrderCount} linked PO(s) - {project.cockpit.purchasing.totalOutstandingQuantity} outstanding</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Readiness Score</p><div className={`mt-2 text-base font-bold ${riskTone}`}>{readinessScore}%</div><div className="mt-1 text-xs text-muted">{project.cockpit.risk.riskLevel} risk - {project.cockpit.risk.shortageItemCount} shortage item(s)</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Material Spend</p><div className="mt-2 text-base font-bold text-text">${project.cockpit.purchasing.linkedLineValue.toFixed(2)}</div><div className="mt-1 text-xs text-muted">{project.cockpit.purchasing.vendorCount} vendor(s) across {project.cockpit.purchasing.linkedLineCount} linked line(s)</div></article>
        </div>
        <div className="mt-3 grid gap-2.5 xl:grid-cols-4">
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Booked Revenue</p><div className="mt-2 text-base font-bold text-text">{formatCurrency(project.cockpit.costs.bookedRevenue)}</div><div className="mt-1 text-xs text-muted">Quoted baseline {formatCurrency(project.cockpit.costs.quotedRevenue)}</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Purchase Commitment</p><div className="mt-2 text-base font-bold text-text">${project.cockpit.costs.linkedPurchaseCommitment.toFixed(2)}</div><div className="mt-1 text-xs text-muted">Linked PO line value already committed</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Planned Material Cost</p><div className="mt-2 text-base font-bold text-text">${project.cockpit.costs.plannedMaterialCost.toFixed(2)}</div><div className="mt-1 text-xs text-muted">Issued so far ${project.cockpit.costs.issuedMaterialCost.toFixed(2)}</div></article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Build Load</p><div className="mt-2 text-base font-bold text-text">{project.cockpit.costs.completedBuildQuantity}/{project.cockpit.costs.buildQuantity}</div><div className="mt-1 text-xs text-muted">{project.cockpit.costs.plannedOperationHours.toFixed(1)} planned operation hours</div></article>
        </div>
        <div className="mt-3 grid gap-2.5 xl:grid-cols-[minmax(0,1fr)_minmax(0,1fr)]">
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3">
            <p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Next Checkpoints</p>
            <div className="mt-4 space-y-3">
              <div className="rounded-[16px] border border-line/70 bg-surface/80 p-3"><div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">Milestone</div><div className="mt-2 font-semibold text-text">{nextMilestone ? nextMilestone.title : "All milestones complete"}</div><div className="mt-1 text-xs text-muted">{nextMilestone ? `${nextMilestone.status.replace("_", " ")} - ${nextMilestone.dueDate ? new Date(nextMilestone.dueDate).toLocaleDateString() : "No due date"}` : "No open milestone remains."}</div></div>
              <div className="rounded-[16px] border border-line/70 bg-surface/80 p-3"><div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">Work Order</div><div className="mt-2 font-semibold text-text">{nextWorkOrder ? nextWorkOrder.workOrderNumber : "No active work orders"}</div><div className="mt-1 text-xs text-muted">{nextWorkOrder ? `${nextWorkOrder.itemSku} - ${nextWorkOrder.completedQuantity}/${nextWorkOrder.quantity} complete` : "Launch or link a work order to populate execution checkpoints."}</div></div>
            </div>
          </article>
          <article className="rounded-[18px] border border-line/70 bg-page/60 p-3">
            <p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Material Watchlist</p>
            {materialExceptionItems.length === 0 ? <div className="mt-4 rounded-[16px] border border-dashed border-line/70 bg-surface/80 px-3 py-4 text-sm text-muted">No current build/buy exception items from linked sales-order planning.</div> : <div className="mt-4 space-y-3">{materialExceptionItems.map((item) => (<div key={item.itemId} className="rounded-[16px] border border-line/70 bg-surface/80 p-3"><div className="flex flex-wrap items-center justify-between gap-3"><div><div className="font-semibold text-text">{item.itemSku}</div><div className="mt-1 text-xs text-muted">{item.itemName}</div></div><div className="text-xs text-muted">Build {item.recommendedBuildQuantity} - Buy {item.recommendedPurchaseQuantity} - Uncovered {item.uncoveredQuantity}</div></div></div>))}</div>}
          </article>
        </div>
      </section>
      <section className="grid gap-3 xl:grid-cols-[minmax(0,1.15fr)_minmax(320px,0.85fr)]">
        <article className="surface-panel">
          <div className="flex items-center justify-between gap-3">
            <div>
              <p className="section-kicker">ACTIONABLE COCKPIT</p>
            </div>
            <Link to="/planning/workbench" className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">
              Open workbench
            </Link>
          </div>
          <div className="mt-3 grid gap-2.5 xl:grid-cols-2">
            <div className="rounded-[18px] border border-line/70 bg-page/60 p-3">
              <p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Build Follow-Through</p>
              <div className="mt-2 text-base font-bold text-text">{topBuildRecommendation ? topBuildRecommendation.itemSku : "No build recommendation"}</div>
              <div className="mt-1 text-xs text-muted">
                {topBuildRecommendation ? `Recommended build qty ${topBuildRecommendation.recommendedBuildQuantity}` : "Planning does not currently recommend a new build."}
              </div>
              {topBuildRecommendation && project.salesOrderId ? (
                <Link
                  to={`/manufacturing/work-orders/new?projectId=${project.id}&itemId=${topBuildRecommendation.itemId}&salesOrderId=${project.salesOrderId}&quantity=${topBuildRecommendation.recommendedBuildQuantity}&notes=${encodeURIComponent(`Project cockpit launch from ${project.projectNumber}`)}`}
                  className="mt-4 inline-flex items-center justify-center rounded-2xl bg-brand px-2 py-2 text-sm font-semibold text-white"
                >
                  Launch work order
                </Link>
              ) : null}
            </div>
            <div className="rounded-[18px] border border-line/70 bg-page/60 p-3">
              <p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Buy Follow-Through</p>
              <div className="mt-2 text-base font-bold text-text">{topPurchaseRecommendation ? topPurchaseRecommendation.itemSku : "No buy recommendation"}</div>
              <div className="mt-1 text-xs text-muted">
                {topPurchaseRecommendation ? `Recommended buy qty ${topPurchaseRecommendation.recommendedPurchaseQuantity}` : "Planning does not currently recommend a new purchase."}
              </div>
              {topPurchaseRecommendation && project.salesOrderId ? (
                <Link
                  to={`/purchasing/orders/new?planningOrderId=${project.salesOrderId}&itemId=${topPurchaseRecommendation.itemId}`}
                  className="mt-4 inline-flex items-center justify-center rounded-2xl bg-brand px-2 py-2 text-sm font-semibold text-white"
                >
                  Launch purchase order
                </Link>
              ) : null}
            </div>
          </div>
          <div className="mt-3 flex flex-wrap gap-3">
            <Link to={`/manufacturing/work-orders/new?projectId=${project.id}`} className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">
              New project work order
            </Link>
            {project.salesOrderId ? (
              <Link to={`/sales/orders/${project.salesOrderId}`} className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">
                Open sales order
              </Link>
            ) : null}
            <Link to="/purchasing/orders" className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">
              Review purchasing
            </Link>
          </div>
        </article>
        <article className="surface-panel">
          <div className="flex items-center justify-between gap-3"><div><p className="section-kicker">LINKED PURCHASING</p></div>{project.salesOrderId ? <Link to="/purchasing/orders" className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">Open purchasing</Link> : null}</div>
          {project.cockpit.purchasing.purchaseOrders.length === 0 ? <div className="mt-5 rounded-[18px] border border-dashed border-line/70 bg-page/60 px-4 py-8 text-center text-sm text-muted">No linked purchase orders are tied to this project yet.</div> : <div className="mt-4 space-y-2.5">{project.cockpit.purchasing.purchaseOrders.slice(0, 5).map((purchaseOrder) => (<Link key={purchaseOrder.id} to={`/purchasing/orders/${purchaseOrder.id}`} className="block rounded-[16px] border border-line/70 bg-page/60 px-3 py-2.5 transition hover:bg-page/80"><div className="flex flex-wrap items-start justify-between gap-3"><div><div className="font-semibold text-text">{purchaseOrder.documentNumber}</div><div className="mt-1 text-xs text-muted">{purchaseOrder.vendorName} - {purchaseOrder.status.replaceAll("_", " ")}</div></div><div className="text-right text-xs text-muted"><div>${purchaseOrder.linkedLineValue.toFixed(2)} linked value</div><div>{purchaseOrder.totalReceivedQuantity}/{purchaseOrder.totalOrderedQuantity} received</div></div></div></Link>))}</div>}
        </article>
        <article className="surface-panel">
          <p className="section-kicker">READINESS DRIVERS</p>
          <div className="mt-3 space-y-2">
            <div className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2"><div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">Risk posture</div><div className={`mt-2 text-lg font-bold ${riskTone}`}>{project.cockpit.risk.riskLevel}</div><div className="mt-1 text-xs text-muted">{project.cockpit.risk.outstandingPurchaseOrderCount} PO(s) still waiting on receipts.</div></div>
            <div className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2 text-sm text-text">Blocked milestones: <span className="font-semibold">{project.cockpit.risk.blockedMilestoneCount}</span></div>
            <div className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2 text-sm text-text">Overdue execution items: <span className="font-semibold">{project.cockpit.risk.overdueMilestoneCount + project.cockpit.risk.overdueWorkOrderCount}</span></div>
            <div className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2 text-sm text-text">Uncovered material quantity: <span className="font-semibold">{project.cockpit.risk.totalUncoveredQuantity}</span></div>
          </div>
        </article>
      </section>
      <section className="grid gap-3 xl:grid-cols-[minmax(0,0.9fr)_minmax(0,1.1fr)]">
        <article className="surface-panel">
          <p className="section-kicker">VENDOR EXPOSURE</p>
          {project.cockpit.purchasing.vendors.length === 0 ? <div className="mt-3 rounded-[18px] border border-dashed border-line/70 bg-page/60 px-3 py-5 text-center text-sm text-muted">No supplier exposure exists until purchasing is linked.</div> : <div className="mt-3 space-y-2">{project.cockpit.purchasing.vendors.slice(0, 4).map((vendor) => (<div key={vendor.vendorId} className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2"><div className="flex flex-wrap items-center justify-between gap-3"><div><div className="font-semibold text-text">{vendor.vendorName}</div><div className="mt-1 text-xs text-muted">{vendor.orderCount} linked order(s)</div></div><div className="text-right text-xs text-muted"><div>${vendor.linkedLineValue.toFixed(2)}</div><div>{vendor.outstandingQuantity} outstanding qty</div></div></div></div>))}</div>}
        </article>
        <article className="surface-panel">
          <p className="section-kicker">RECENT RECEIPTS</p>
          {project.cockpit.purchasing.recentReceipts.length === 0 ? <div className="mt-3 rounded-[18px] border border-dashed border-line/70 bg-page/60 px-3 py-5 text-center text-sm text-muted">No purchase receipts have been posted against linked project supply.</div> : <div className="mt-3 space-y-2">{project.cockpit.purchasing.recentReceipts.map((receipt) => (<div key={receipt.receiptId} className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2"><div className="flex flex-wrap items-start justify-between gap-3"><div><div className="font-semibold text-text">{receipt.receiptNumber}</div><div className="mt-1 text-xs text-muted">{receipt.vendorName} - {receipt.purchaseOrderNumber}</div></div><div className="text-right text-xs text-muted"><div>{new Date(receipt.receivedAt).toLocaleDateString()}</div><div>{receipt.totalQuantity} units received</div></div></div></div>))}</div>}
        </article>
      </section>
      <div className="grid gap-3 xl:grid-cols-[minmax(0,1.05fr)_minmax(320px,0.95fr)]">
        <article className="surface-panel">
          <p className="section-kicker">CUSTOMER LINKAGE</p>
          <dl className="mt-3 grid gap-3">
            <div><dt className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Account</dt><dd className="mt-1 text-sm text-text"><Link to={`/crm/customers/${project.customerId}`} className="hover:text-brand">{project.customerName}</Link></dd></div>
            <div><dt className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Email</dt><dd className="mt-1 text-sm text-text">{project.customerEmail}</dd></div>
            <div><dt className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Phone</dt><dd className="mt-1 text-sm text-text">{project.customerPhone}</dd></div>
          </dl>
        </article>
        <article className="surface-panel">
          <p className="section-kicker">PROGRAM NOTES</p>
          <p className="mt-3 whitespace-pre-line text-sm leading-6 text-text">{project.notes || "No project notes recorded."}</p>
        </article>
      </div>
      <section className="surface-panel">
        <p className="section-kicker">COMMERCIAL + DELIVERY LINKS</p>
        <div className="mt-3 grid gap-3 xl:grid-cols-3">
          <div className="rounded-2xl border border-line/70 bg-page/60 px-2 py-2 text-sm"><div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">Quote</div><div className="mt-2 font-semibold text-text">{project.salesQuoteNumber ? <Link to={`/sales/quotes/${project.salesQuoteId}`} className="hover:text-brand">{project.salesQuoteNumber}</Link> : "Not linked"}</div></div>
          <div className="rounded-2xl border border-line/70 bg-page/60 px-2 py-2 text-sm"><div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">Sales Order</div><div className="mt-2 font-semibold text-text">{project.salesOrderNumber ? <Link to={`/sales/orders/${project.salesOrderId}`} className="hover:text-brand">{project.salesOrderNumber}</Link> : "Not linked"}</div></div>
          <div className="rounded-2xl border border-line/70 bg-page/60 px-2 py-2 text-sm"><div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">Shipment</div><div className="mt-2 font-semibold text-text">{project.shipmentNumber ? <Link to={`/shipping/shipments/${project.shipmentId}`} className="hover:text-brand">{project.shipmentNumber}</Link> : "Not linked"}</div></div>
        </div>
      </section>
      <section className="surface-panel">
        <div className="flex items-center justify-between gap-3">
          <div><p className="section-kicker">MILESTONES</p></div>
          {canManage ? <Link to={`/projects/${project.id}/edit`} className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">Edit milestones</Link> : null}
        </div>
        {project.milestones.length === 0 ? <div className="mt-3 rounded-[18px] border border-dashed border-line/70 bg-page/60 px-3 py-5 text-center text-sm text-muted">No milestones are defined for this project yet.</div> : <div className="mt-3 space-y-2">{project.milestones.map((milestone) => (<div key={milestone.id} className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2"><div className="flex flex-wrap items-start justify-between gap-3"><div className="min-w-0"><div className="font-semibold text-text">{milestone.title}</div><div className="mt-2 flex flex-wrap items-center gap-2"><span className={`inline-flex rounded-full px-2 py-1 text-xs font-semibold uppercase tracking-[0.16em] ${projectMilestoneStatusPalette[milestone.status]}`}>{milestone.status.replace("_", " ")}</span><span className="text-xs text-muted">Due {milestone.dueDate ? new Date(milestone.dueDate).toLocaleDateString() : "not scheduled"}</span>{milestone.completedAt ? <span className="text-xs text-muted">Completed {new Date(milestone.completedAt).toLocaleDateString()}</span> : null}</div>{milestone.notes ? <div className="mt-3 whitespace-pre-line text-sm text-text">{milestone.notes}</div> : null}</div>{canManage ? <div className="flex flex-wrap gap-2">{milestoneQuickActions(milestone.status).map((action) => (<button key={action.status} type="button" onClick={() => void updateMilestoneStatus(milestone.id, action.status)} disabled={updatingMilestoneId === milestone.id} className="rounded-2xl border border-line/70 px-2 py-2 text-xs font-semibold text-text disabled:cursor-not-allowed disabled:opacity-60">{updatingMilestoneId === milestone.id ? "Saving..." : action.label}</button>))}</div> : null}</div></div>))}</div>}
      </section>
      {planning ? (
        <section className="surface-panel">
          <p className="section-kicker">MATERIAL READINESS</p>
          <div className="mt-3 grid gap-3 xl:grid-cols-4">
            <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Build Qty</p><div className="mt-1 text-base font-bold text-text">{planning.summary.totalBuildQuantity}</div></article>
            <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Buy Qty</p><div className="mt-1 text-base font-bold text-text">{planning.summary.totalPurchaseQuantity}</div></article>
            <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Uncovered Qty</p><div className="mt-1 text-base font-bold text-text">{planning.summary.totalUncoveredQuantity}</div></article>
            <article className="surface-panel-tight"><p className="text-xs font-semibold uppercase tracking-[0.18em] text-muted">Shortage Items</p><div className="mt-1 text-base font-bold text-text">{planning.summary.uncoveredItemCount}</div></article>
          </div>
          <div className="mt-3 space-y-2">
            {planning.items.filter((item) => item.recommendedBuildQuantity > 0 || item.recommendedPurchaseQuantity > 0 || item.uncoveredQuantity > 0).slice(0, 8).map((item) => (
              <div key={item.itemId} className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2"><div className="flex flex-wrap items-center justify-between gap-3"><div><div className="font-semibold text-text">{item.itemSku}</div><div className="mt-1 text-xs text-muted">{item.itemName}</div></div><div className="text-sm text-muted">Build {item.recommendedBuildQuantity} - Buy {item.recommendedPurchaseQuantity} - Uncovered {item.uncoveredQuantity}</div></div></div>
            ))}
          </div>
        </section>
      ) : null}
      <section className="surface-panel">
        <div className="flex items-center justify-between gap-3">
          <div><p className="section-kicker">MANUFACTURING LINKS</p></div>
          {canManage ? <Link to={`/manufacturing/work-orders/new?projectId=${project.id}`} className="inline-flex items-center justify-center rounded-2xl border border-line/70 px-2 py-2 text-sm font-semibold text-text">New work order</Link> : null}
        </div>
        {workOrders.length === 0 ? <div className="mt-3 rounded-[18px] border border-dashed border-line/70 bg-page/60 px-3 py-5 text-center text-sm text-muted">No work orders are linked to this project yet.</div> : <div className="mt-3 space-y-2">{workOrders.map((workOrder) => (<Link key={workOrder.id} to={`/manufacturing/work-orders/${workOrder.id}`} className="block rounded-[18px] border border-line/70 bg-page/60 px-2 py-2 transition hover:bg-page/80"><div className="flex flex-wrap items-center justify-between gap-3"><div><div className="font-semibold text-text">{workOrder.workOrderNumber}</div><div className="mt-1 text-xs text-muted">{workOrder.itemSku} - {workOrder.completedQuantity}/{workOrder.quantity} complete</div></div><div className="text-sm font-semibold text-text">{workOrder.status.replace("_", " ")}</div></div></Link>))}</div>}
      </section>
      <section className="surface-panel">
        <div className="flex items-center justify-between gap-3">
          <div><p className="section-kicker">ACTIVITY TIMELINE</p></div>
        </div>
        {project.timeline.length === 0 ? (
          <div className="mt-3 rounded-[18px] border border-dashed border-line/70 bg-page/60 px-3 py-5 text-center text-sm text-muted">No timeline activity is available for this project yet.</div>
        ) : (
          <div className="mt-3 space-y-2">
            {project.timeline.map((entry) => (
              <div key={entry.id} className="rounded-[18px] border border-line/70 bg-page/60 px-2 py-2">
                <div className="flex flex-wrap items-start justify-between gap-3">
                  <div className="min-w-0">
                    <div className="text-xs font-semibold uppercase tracking-[0.16em] text-muted">{entry.sourceType}</div>
                    <div className="mt-1 font-semibold text-text">
                      {entry.href ? <Link to={entry.href} className="hover:text-brand">{entry.title}</Link> : entry.title}
                    </div>
                    <div className="mt-1 text-sm text-muted">{entry.detail}</div>
                  </div>
                  <div className="text-right text-xs text-muted">
                    <div>{new Date(entry.createdAt).toLocaleString()}</div>
                    <div>{entry.actorName || "System"}</div>
                  </div>
                </div>
              </div>
            ))}
          </div>
        )}
      </section>
      <FileAttachmentsPanel ownerType="PROJECT" ownerId={project.id} eyebrow="Project Documents" title="Program file hub" description="Store drawings, revision references, correspondence, and support files directly on the project record." emptyMessage="No project files have been uploaded yet." />
      <div className="rounded-2xl border border-line/70 bg-page/60 px-2 py-2 text-sm text-muted">{status}</div>
    </section>
  );
}
