const COMPREHENSIVE_TASK_KEY = "comprehensive-case-training";

const knownTaskPaths = Object.freeze({
  "new-product-survey": "/foundation/new-product-survey",
  "product-development-factors": "/foundation/product-development-factors",
  "product-development-process": "/foundation/product-development-process",
  "industry-demand-analysis": "/demand/index",
  "competitive-environment-analysis": "/demand/environment",
  "market-opportunity-selection": "/product/index",
  "business-feasibility": "/demand/business-feasibility",
  "target-user-profile": "/demand/people",
  "consumer-behavior": "/demand/consumer-behavior",
  "consumer-scenario": "/demand/consumer-scenario",
  "feature-conversion": "/demand/feature-conversion",
  "product-value-positioning": "/product/differentiation",
  "product-structure": "/product/structure",
  "after-sales-service": "/product/after-sales-service",
  "requirements-doc": "/product/requirements-doc",
  "hardware-cost": "/product/hardware-cost",
  "supplier-evaluation": "/channel/supplier",
  "purchase-demand-forecast": "/channel/index",
  "product-pricing": "/product/price",
  "category-optimization": "/assessment/optimization",
  "release-channel-evaluation": "/test/index",
  "promotion-effect-optimization": "/test/promotion",
  "product-diagnosis-iteration": "/assessment/diagnosis",
});

function taskPath(taskKey) {
  return knownTaskPaths[taskKey] || `/training/task/${encodeURIComponent(taskKey)}`;
}

function taskSort(task) {
  return Number.isFinite(Number(task?.sort)) ? Number(task.sort) : Number.MAX_SAFE_INTEGER;
}

export function buildStudentTaskSections(tasks = []) {
  const sections = new Map();
  [...tasks]
    .filter((task) => task?.taskKey && task.taskKey !== COMPREHENSIVE_TASK_KEY)
    .sort((left, right) => taskSort(left) - taskSort(right))
    .forEach((task) => {
      const title = task.projectName || "其他实训";
      if (!sections.has(title)) sections.set(title, { title, children: [] });
      sections.get(title).children.push({
        title: task.taskName || task.taskKey,
        path: taskPath(task.taskKey),
    });
      });
  return [...sections.values()];
}

export function getComprehensiveTopTask(tasks = []) {
  const task = tasks.find((item) => item?.taskKey === COMPREHENSIVE_TASK_KEY);
  return task
    ? { title: task.taskName || "综合实训", path: "/comprehensive/index", activePrefix: "/comprehensive" }
    : null;
}