// @ts-check

/**
 * @typedef {object} ErrorInfo
 * @property {number} lineNumber
 * @property {string} [context]
 * @property {string} [detail]
 * @property {[number, number]} [range]
 */

/**
 * @typedef {object} Params
 * @property {string[]} lines
 */

/** @typedef {(error: ErrorInfo) => void} OnError */

/**
 * @typedef {object} Rule
 * @property {string[]} names
 * @property {string} description
 * @property {string[]} tags
 * @property {(params: Params, onError: OnError) => void} function
 */

/** @type {Rule} */
export default {
  names: ["one-sentence-per-line"],
  description: "Each sentence must be on its own line",
  tags: ["sentences"],
  function: function (params, onError) {
    let inFence = false;
    params.lines.forEach((line, index) => {
      if (/^```/.test(line)) {
        inFence = !inFence;
        return;
      }
      if (inFence) return;
      // Skip headings, blank lines, HTML, table rows
      if (/^(#|\s*[|<]|>|\s*$)/.test(line)) return;
      // Strip list marker before checking
      const text = line.replace(/^\s*(?:[-*+]|\d+\.)\s+/, "");
      if (/[.!?]\s+[A-Z]/.test(text)) {
        onError({ lineNumber: index + 1, context: text.trim() });
      }
    });
  },
};