/**
 * Doc Link Checker
 *
 * We define here a test to make sure that there are no dead link in the Owl
 * documentation.
 */
// import * as fs from "fs";

// //--------------------------------------------------------------------------
// // Helpers
// //--------------------------------------------------------------------------

// interface MarkDownLink {
//   name: string;
//   link: string;
// }

// interface MarkDownSection {
//   name: string;
//   slug: string;
// }

// interface FileData {
//   name: string;
//   path: string[];
//   fullName: string;
//   links: MarkDownLink[];
//   sections: MarkDownSection[];
// }

// const LINK_REGEXP = /\[([^\[]+)\]\(([^\)]+)\)/g;
// const HEADING_REGEXP = /\n(#+\s*)(.*)/g;

// export function addMardownData(fileData): void {
//   const sep = fileData.path.length > 0 ? "/" : "";
//   const fullName = fileData.path.join("/") + sep + fileData.name;
//   const content = fs.readFileSync(fullName, { encoding: "utf8" });
//   let m;
//   // get links info
//   do {
//     m = LINK_REGEXP.exec(content);
//     if (m) {
//       fileData.links.push({ name: m[0], link: m[2] });
//     }
//   } while (m);
//   // get sections info
//   do {
//     m = HEADING_REGEXP.exec(content);
//     if (m) {
//       fileData.sections.push({ name: m[0], slug: slugify(m[2]) });
//     }
//   } while (m);
// }

// /**
//  * Returns a list of FileData corresponding to all files that need to be
//  * validated.
//  */
// function getFiles(path: string[] = []): FileData[] {
//   if (path.length === 0) {
//     const baseFiles: FileData[] = [
//       { name: "README.md", path: [], links: [], sections: [], fullName: "README.md" },
//       { name: "roadmap.md", path: [], links: [], sections: [], fullName: "roadmap.md" },
//     ];
//     const rest = getFiles(["doc"]);
//     const result = baseFiles.concat(rest);
//     result.forEach(addMardownData);
//     return result;
//   }
//   const files = fs.readdirSync(path.join("/"), { withFileTypes: true }).map((f) => {
//     if (f.isDirectory()) {
//       return getFiles(path.concat(f.name));
//     }
//     const fullName = path.join("/") + (path.length > 0 ? "/" : "") + f.name;
//     return [
//       {
//         name: f.name,
//         path,
//         links: [],
//         sections: [],
//         fullName,
//       },
//     ];
//   });
//   return Array.prototype.concat(...files);
// }

// const LOCAL_FILES = ["LICENSE", "tools/debug.js"];
// export function isLinkValid(link: MarkDownLink, current: FileData, files: FileData[]): boolean {
//   if (link.link.startsWith("http")) {
//     // no check on external links
//     return true;
//   }
//   // Step 1: extract path, name, hash
//   //      path = ['doc', 'architecture]
//   //      name = 'rendering.md'
//   //      hash = 'blabla' (or '' if no hash)

//   const parts = link.link.split("#");
//   const hash = parts[1] || "";
//   let name;
//   let path;
//   if (parts[0]) {
//     let temp = parts[0].split("/");
//     name = temp[temp.length - 1];
//     temp.splice(-1);
//     path = current.path.slice();
//     for (let elem of temp) {
//       if (elem === "..") {
//         path.splice(-1);
//       } else if (elem !== ".") {
//         path.push(elem);
//       }
//     }
//   } else {
//     // there are no file name, so this is a relative link to the current file
//     name = current.name;
//     path = current.path;
//   }

//   // Step 2: build normalized link file name
//   const linkFullName = path.join("/") + (path.length > 0 ? "/" : "") + name;

//   // Step 3: check link name against white list of local files
//   if (LOCAL_FILES.includes(linkFullName)) {
//     return true;
//   }

//   // Step 4: check if there is a matching file
//   let target: FileData | undefined = files.find((f) => f.fullName === linkFullName);
//   if (!target) {
//     return false;
//   }

//   // Step 5: if necessary, check if there is a corresponding link inside the target
//   // link name
//   if (hash) {
//     if (!target.sections.find((s) => s.slug === hash)) {
//       return false;
//     }
//   }

//   return true;
// }

// // adapted from https://medium.com/@mhagemann/the-ultimate-way-to-slugify-a-url-string-in-javascript-b8e4a0d849e1
// function slugify(str) {
//   const a = "àáäâãåăæçèéëêǵḧìíïîḿńǹñòóöôœøṕŕßśșțùúüûǘẃẍÿź·_,:;";
//   const b = "aaaaaaaaceeeeghiiiimnnnooooooprssstuuuuuwxyz-----";
//   const p = new RegExp(a.split("").join("|"), "g");
//   return str
//     .toString()
//     .toLowerCase()
//     .replace(/\//g, "") // remove /
//     .replace(/\s+/g, "-") // Replace spaces with -
//     .replace(p, (c) => b.charAt(a.indexOf(c))) // Replace special characters
//     .replace(/&/g, "-and-") // Replace & with ‘and’
//     .replace(/[^\w\-]+/g, "") // Remove all non-word characters
//     .replace(/\-\-+/g, "-") // Replace multiple - with single -
//     .replace(/^-+/, "") // Trim - from start of text
//     .replace(/-+$/, ""); // Trim - from end of text
// }

//--------------------------------------------------------------------------
// Test
//--------------------------------------------------------------------------

test.skip("All markdown links work", () => {
  // let linkNumber = 0;
  // let invalidLinkNumber = 0;
  // const data = getFiles();
  // for (let file of data) {
  //   for (let link of file.links) {
  //     linkNumber++;
  //     if (!isLinkValid(link, file, data)) {
  //       console.warn(`Invalid Link: "${link.name}" in "${file.name}"`);
  //       invalidLinkNumber++;
  //     }
  //   }
  // }
  // expect(invalidLinkNumber).toBe(0);
  // expect(linkNumber).toBeGreaterThan(10);
});