import { readFileSync } from 'fs';
/**
 * Extract parameter names from a params string, stripping type annotations.
 * e.g. "a: string, b: number = 5" -> ["a", "b"]
 */
function extractParamNames(paramsStr) {
    if (!paramsStr.trim())
        return [];
    const params = [];
    let depth = 0;
    let current = '';
    for (const ch of paramsStr) {
        if (ch === '<' || ch === '(' || ch === '{' || ch === '[') {
            depth++;
            current += ch;
        }
        else if (ch === '>' || ch === ')' || ch === '}' || ch === ']') {
            depth--;
            current += ch;
        }
        else if (ch === ',' && depth === 0) {
            params.push(current);
            current = '';
        }
        else {
            current += ch;
        }
    }
    if (current.trim()) {
        params.push(current);
    }
    return params
        .map((p) => {
        const trimmed = p.trim();
        // Handle destructured params like { a, b }: Type
        if (trimmed.startsWith('{')) {
            return trimmed.replace(/\}.*$/, '}').replace(/[{}]/g, '').split(',').map((s) => s.split(':')[0].trim()).filter(Boolean);
        }
        // Handle array destructured params like [a, b]: Type
        if (trimmed.startsWith('[')) {
            return trimmed.replace(/\].*$/, ']').replace(/[[\]]/g, '').split(',').map((s) => s.split(':')[0].trim()).filter(Boolean);
        }
        // Handle rest params: ...args: string[]
        const name = trimmed.replace(/^\.\.\./, '').split(/[?:=]/)[0].trim();
        return name ? [name] : [];
    })
        .flat()
        .filter(Boolean);
}
/**
 * Find the end line of a block starting at a given line by counting braces.
 * Returns the line number (1-indexed) of the closing brace.
 */
function findBlockEnd(lines, startLineIndex) {
    let depth = 0;
    let foundOpen = false;
    for (let i = startLineIndex; i < lines.length; i++) {
        const line = lines[i];
        for (const ch of line) {
            if (ch === '{') {
                depth++;
                foundOpen = true;
            }
            else if (ch === '}') {
                depth--;
                if (foundOpen && depth === 0) {
                    return i + 1; // 1-indexed
                }
            }
        }
    }
    // If no matching brace found, return end of file
    return lines.length;
}
/**
 * Parse TypeScript/JavaScript content and extract structural information.
 */
export function parseTypeScript(content) {
    const lines = content.split('\n');
    const functions = [];
    const classes = [];
    const imports = [];
    const exports = [];
    // Track which names are already captured as function/class exports
    const functionAndClassExportNames = new Set();
    // --- Extract Functions ---
    // Patterns for function declarations
    const funcPatterns = [
        // export default async function name(params)
        /^(\s*)(export\s+default\s+)?(export\s+)?(?:async\s+)?function\s*\*?\s+(\w+)\s*\(([^)]*)\)/,
        // const/let/var name = (async) (params) => or function expression
        /^(\s*)(export\s+)?(?:const|let|var)\s+(\w+)\s*=\s*(?:async\s+)?\(([^)]*)\)\s*(?::\s*[^=]*?)?\s*=>/,
        // const/let/var name = async (params) => (alternate capture for async before parens)
        /^(\s*)(export\s+)?(?:const|let|var)\s+(\w+)\s*=\s*async\s*\(([^)]*)\)\s*(?::\s*[^=]*?)?\s*=>/,
    ];
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // Try standard function declaration pattern
        const funcDeclMatch = line.match(/^(\s*)(export\s+default\s+|export\s+)?(?:async\s+)?function\s*\*?\s+(\w+)\s*\(([^)]*)\)/);
        if (funcDeclMatch) {
            const isExported = !!funcDeclMatch[2];
            const name = funcDeclMatch[3];
            const paramsStr = funcDeclMatch[4];
            const startLine = i + 1;
            const endLine = findBlockEnd(lines, i);
            functions.push({
                name,
                startLine,
                endLine,
                params: extractParamNames(paramsStr),
                isExported,
            });
            if (isExported) {
                functionAndClassExportNames.add(name);
                if (!exports.includes(name))
                    exports.push(name);
            }
            continue;
        }
        // Try arrow function pattern: (export) const/let/var name = (async) (params) =>
        const arrowMatch = line.match(/^(\s*)(export\s+)?(?:const|let|var)\s+(\w+)\s*=\s*(?:async\s+)?\(([^)]*)\)\s*(?::[^=]*?)?\s*=>/);
        if (arrowMatch) {
            const isExported = !!arrowMatch[2];
            const name = arrowMatch[3];
            const paramsStr = arrowMatch[4];
            const startLine = i + 1;
            // Arrow functions may or may not have a block body
            const hasBlock = line.includes('=>') && (line.trim().endsWith('{') || lines[i]?.includes('{'));
            const endLine = hasBlock ? findBlockEnd(lines, i) : i + 1;
            functions.push({
                name,
                startLine,
                endLine,
                params: extractParamNames(paramsStr),
                isExported,
            });
            if (isExported) {
                functionAndClassExportNames.add(name);
                if (!exports.includes(name))
                    exports.push(name);
            }
            continue;
        }
        // Try arrow function with no parens for single param: const name = param =>
        const singleParamArrow = line.match(/^(\s*)(export\s+)?(?:const|let|var)\s+(\w+)\s*=\s*(?:async\s+)?(\w+)\s*=>/);
        if (singleParamArrow) {
            const isExported = !!singleParamArrow[2];
            const name = singleParamArrow[3];
            const paramName = singleParamArrow[4];
            const startLine = i + 1;
            const hasBlock = line.trim().endsWith('{');
            const endLine = hasBlock ? findBlockEnd(lines, i) : i + 1;
            functions.push({
                name,
                startLine,
                endLine,
                params: [paramName],
                isExported,
            });
            if (isExported) {
                functionAndClassExportNames.add(name);
                if (!exports.includes(name))
                    exports.push(name);
            }
            continue;
        }
    }
    // --- Extract Classes ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        const classMatch = line.match(/^(\s*)(export\s+default\s+|export\s+)?(?:abstract\s+)?class\s+(\w+)/);
        if (classMatch) {
            const isExported = !!classMatch[2];
            const name = classMatch[3];
            const startLine = i + 1;
            const endLine = findBlockEnd(lines, i);
            // Extract methods within the class body
            const methods = [];
            const classBodyLines = lines.slice(i + 1, endLine - 1);
            for (const bodyLine of classBodyLines) {
                // Match method patterns: methodName(, async methodName(, get/set methodName(, static methodName(, abstract methodName(
                const methodMatch = bodyLine.match(/^\s*(?:public\s+|private\s+|protected\s+)?(?:static\s+)?(?:abstract\s+)?(?:async\s+)?(?:get\s+|set\s+)?(?:\*\s*)?(\w+)\s*\(/);
                if (methodMatch) {
                    const methodName = methodMatch[1];
                    // Skip control flow keywords that look like method calls
                    if (methodName && methodName !== 'if' && methodName !== 'for' && methodName !== 'while' && methodName !== 'switch' && methodName !== 'catch') {
                        if (!methods.includes(methodName)) {
                            methods.push(methodName);
                        }
                    }
                }
            }
            classes.push({
                name,
                startLine,
                endLine,
                methods,
                isExported,
            });
            if (isExported) {
                functionAndClassExportNames.add(name);
                if (!exports.includes(name))
                    exports.push(name);
            }
        }
    }
    // --- Extract Imports ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // import { a, b } from 'module'
        const namedImportMatch = line.match(/^\s*import\s+\{([^}]+)\}\s+from\s+['"]([^'"]+)['"]/);
        if (namedImportMatch) {
            const names = namedImportMatch[1].split(',').map((n) => {
                const parts = n.trim().split(/\s+as\s+/);
                return parts[parts.length - 1].trim();
            }).filter(Boolean);
            imports.push({ source: namedImportMatch[2], names });
            continue;
        }
        // import name from 'module' (default import)
        const defaultImportMatch = line.match(/^\s*import\s+(\w+)\s+from\s+['"]([^'"]+)['"]/);
        if (defaultImportMatch) {
            imports.push({ source: defaultImportMatch[2], names: [defaultImportMatch[1]] });
            continue;
        }
        // import * as name from 'module' (namespace import)
        const namespaceImportMatch = line.match(/^\s*import\s+\*\s+as\s+(\w+)\s+from\s+['"]([^'"]+)['"]/);
        if (namespaceImportMatch) {
            imports.push({ source: namespaceImportMatch[2], names: [namespaceImportMatch[1]] });
            continue;
        }
        // import default, { named } from 'module'
        const mixedImportMatch = line.match(/^\s*import\s+(\w+)\s*,\s*\{([^}]+)\}\s+from\s+['"]([^'"]+)['"]/);
        if (mixedImportMatch) {
            const names = [mixedImportMatch[1]];
            const namedParts = mixedImportMatch[2].split(',').map((n) => {
                const parts = n.trim().split(/\s+as\s+/);
                return parts[parts.length - 1].trim();
            }).filter(Boolean);
            names.push(...namedParts);
            imports.push({ source: mixedImportMatch[3], names });
            continue;
        }
        // import 'module' (side-effect import)
        const sideEffectMatch = line.match(/^\s*import\s+['"]([^'"]+)['"]/);
        if (sideEffectMatch) {
            imports.push({ source: sideEffectMatch[1], names: [] });
            continue;
        }
        // const { a, b } = require('module') (destructured require)
        const destructuredRequireMatch = line.match(/^\s*(?:const|let|var)\s+\{([^}]+)\}\s*=\s*require\s*\(\s*['"]([^'"]+)['"]\s*\)/);
        if (destructuredRequireMatch) {
            const names = destructuredRequireMatch[1].split(',').map((n) => {
                const parts = n.trim().split(/\s*:\s*/);
                return parts[parts.length - 1].trim();
            }).filter(Boolean);
            imports.push({ source: destructuredRequireMatch[2], names });
            continue;
        }
        // const name = require('module') (CommonJS require)
        const requireMatch = line.match(/^\s*(?:const|let|var)\s+(\w+)\s*=\s*require\s*\(\s*['"]([^'"]+)['"]\s*\)/);
        if (requireMatch) {
            imports.push({ source: requireMatch[2], names: [requireMatch[1]] });
            continue;
        }
    }
    // --- Extract Exports ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // export { a, b } or export { a, b } from 'module'
        const namedExportMatch = line.match(/^\s*export\s+\{([^}]+)\}/);
        if (namedExportMatch) {
            const names = namedExportMatch[1].split(',').map((n) => {
                const parts = n.trim().split(/\s+as\s+/);
                return parts[parts.length - 1].trim();
            }).filter(Boolean);
            for (const name of names) {
                if (!exports.includes(name))
                    exports.push(name);
            }
            continue;
        }
        // export default name (not function/class which are already captured)
        const defaultExportMatch = line.match(/^\s*export\s+default\s+(\w+)\s*;?\s*$/);
        if (defaultExportMatch) {
            const name = defaultExportMatch[1];
            // Skip if it's a keyword that starts a declaration (already captured)
            if (name !== 'function' && name !== 'class' && name !== 'abstract') {
                if (!exports.includes(name))
                    exports.push(name);
            }
            continue;
        }
        // export const/let/var name (not arrow functions which are already captured)
        const varExportMatch = line.match(/^\s*export\s+(?:const|let|var)\s+(\w+)/);
        if (varExportMatch) {
            const name = varExportMatch[1];
            if (!exports.includes(name))
                exports.push(name);
            continue;
        }
    }
    return { functions, classes, imports, exports };
}
/**
 * Get the indentation level (number of leading spaces) of a line.
 * Tabs are counted as 4 spaces.
 */
function getIndentation(line) {
    let count = 0;
    for (const ch of line) {
        if (ch === ' ')
            count++;
        else if (ch === '\t')
            count += 4;
        else
            break;
    }
    return count;
}
/**
 * Find the end line of an indentation-based block (Python).
 * The block ends when a non-empty line at the same or lower indentation level is found,
 * or at end of file.
 */
function findIndentBlockEnd(lines, startLineIndex) {
    const baseIndent = getIndentation(lines[startLineIndex]);
    for (let i = startLineIndex + 1; i < lines.length; i++) {
        const line = lines[i];
        // Skip empty lines and comment-only lines
        if (line.trim() === '' || line.trim().startsWith('#')) {
            continue;
        }
        const indent = getIndentation(line);
        if (indent <= baseIndent) {
            // The block ended at the previous non-empty line
            // Walk back to find the last non-empty line of the block
            for (let j = i - 1; j > startLineIndex; j--) {
                if (lines[j].trim() !== '') {
                    return j + 1; // 1-indexed
                }
            }
            return startLineIndex + 1; // 1-indexed, just the def/class line itself
        }
    }
    // Block extends to end of file — find last non-empty line
    for (let j = lines.length - 1; j > startLineIndex; j--) {
        if (lines[j].trim() !== '') {
            return j + 1; // 1-indexed
        }
    }
    return lines.length;
}
/**
 * Extract parameter names from a Python params string, stripping type annotations and defaults.
 * e.g. "self, name: str, age: int = 0, *args, **kwargs" -> ["self", "name", "age", "args", "kwargs"]
 */
function extractPythonParamNames(paramsStr) {
    if (!paramsStr.trim())
        return [];
    const params = [];
    let depth = 0;
    let current = '';
    for (const ch of paramsStr) {
        if (ch === '(' || ch === '[' || ch === '{') {
            depth++;
            current += ch;
        }
        else if (ch === ')' || ch === ']' || ch === '}') {
            depth--;
            current += ch;
        }
        else if (ch === ',' && depth === 0) {
            params.push(current);
            current = '';
        }
        else {
            current += ch;
        }
    }
    if (current.trim()) {
        params.push(current);
    }
    return params
        .map((p) => {
        let trimmed = p.trim();
        // Strip leading * or **
        trimmed = trimmed.replace(/^\*\*/, '').replace(/^\*/, '');
        // Strip type annotation (everything after :) and default (everything after =)
        const name = trimmed.split(/[=:]/)[0].trim();
        return name;
    })
        .filter((name) => name !== '' && name !== '/');
}
/**
 * Parse Python content and extract structural information.
 */
export function parsePython(content) {
    const lines = content.split('\n');
    const functions = [];
    const classes = [];
    const imports = [];
    const exports = [];
    // Check for __all__ definition
    let allNames = null;
    const allMatch = content.match(/__all__\s*=\s*\[([^\]]*)\]/s);
    if (allMatch) {
        allNames = allMatch[1]
            .split(',')
            .map((s) => s.trim().replace(/^['"]|['"]$/g, ''))
            .filter(Boolean);
    }
    // --- Extract Classes first (to know which line ranges are class bodies) ---
    const classRanges = [];
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // Match class definitions: class Name: or class Name(Base):
        const classMatch = line.match(/^(\s*)class\s+(\w+)\s*(?:\([^)]*\))?\s*:/);
        if (classMatch) {
            const classIndent = getIndentation(line);
            const name = classMatch[2];
            const startLine = i + 1; // 1-indexed
            const endLine = findIndentBlockEnd(lines, i);
            const isExported = !name.startsWith('_');
            // Extract methods within the class body
            const methods = [];
            for (let j = i + 1; j < endLine; j++) {
                const bodyLine = lines[j];
                const methodMatch = bodyLine.match(/^(\s*)(?:async\s+)?def\s+(\w+)\s*\(/);
                if (methodMatch) {
                    const methodIndent = getIndentation(bodyLine);
                    // Method must be indented more than the class
                    if (methodIndent > classIndent) {
                        methods.push(methodMatch[2]);
                    }
                }
            }
            classes.push({
                name,
                startLine,
                endLine,
                methods,
                isExported,
            });
            classRanges.push({ start: i, end: endLine - 1 }); // 0-indexed range
            if (isExported) {
                if (!exports.includes(name))
                    exports.push(name);
            }
        }
    }
    // --- Extract Functions (skip those inside class bodies) ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // Skip lines that are inside a class body
        const insideClass = classRanges.some((r) => i > r.start && i <= r.end);
        if (insideClass)
            continue;
        // Match function definitions: def name(params): or async def name(params):
        const funcMatch = line.match(/^(\s*)(?:async\s+)?def\s+(\w+)\s*\(([^)]*)\)\s*(?:->.*?)?\s*:/);
        if (funcMatch) {
            const funcIndent = getIndentation(line);
            const name = funcMatch[2];
            const paramsStr = funcMatch[3];
            const startLine = i + 1; // 1-indexed
            const endLine = findIndentBlockEnd(lines, i);
            // A top-level function (indent 0) that doesn't start with _ is "exported"
            const isExported = funcIndent === 0 && !name.startsWith('_');
            const params = extractPythonParamNames(paramsStr);
            functions.push({
                name,
                startLine,
                endLine,
                params,
                isExported,
            });
            if (isExported) {
                if (!exports.includes(name))
                    exports.push(name);
            }
        }
    }
    // --- Extract Imports ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // from module import (name1, name2) — multi-line
        const fromMultiLineMatch = line.match(/^\s*from\s+([\w.]+)\s+import\s*\(/);
        if (fromMultiLineMatch) {
            const source = fromMultiLineMatch[1];
            let namesStr = '';
            // Collect names until closing paren
            const afterParen = line.substring(line.indexOf('(') + 1);
            if (afterParen.includes(')')) {
                // Single line with parens: from module import (a, b)
                namesStr = afterParen.substring(0, afterParen.indexOf(')'));
            }
            else {
                namesStr = afterParen;
                for (let j = i + 1; j < lines.length; j++) {
                    const contLine = lines[j];
                    if (contLine.includes(')')) {
                        namesStr += contLine.substring(0, contLine.indexOf(')'));
                        break;
                    }
                    namesStr += contLine;
                }
            }
            const names = namesStr
                .split(',')
                .map((n) => {
                const parts = n.trim().split(/\s+as\s+/);
                return parts[parts.length - 1].trim();
            })
                .filter(Boolean);
            imports.push({ source, names });
            continue;
        }
        // from module import name1, name2 (single line)
        const fromImportMatch = line.match(/^\s*from\s+([\w.]+)\s+import\s+(.+)$/);
        if (fromImportMatch) {
            const source = fromImportMatch[1];
            const importPart = fromImportMatch[2].trim();
            if (importPart === '*') {
                imports.push({ source, names: ['*'] });
            }
            else {
                const names = importPart
                    .split(',')
                    .map((n) => {
                    const parts = n.trim().split(/\s+as\s+/);
                    return parts[parts.length - 1].trim();
                })
                    .filter(Boolean);
                imports.push({ source, names });
            }
            continue;
        }
        // import module or import module as alias or import mod1, mod2
        const importMatch = line.match(/^\s*import\s+(.+)$/);
        if (importMatch) {
            const importPart = importMatch[1].trim();
            const modules = importPart.split(',');
            for (const mod of modules) {
                const parts = mod.trim().split(/\s+as\s+/);
                const source = parts[0].trim();
                const alias = parts.length > 1 ? parts[parts.length - 1].trim() : source;
                imports.push({ source, names: [alias] });
            }
            continue;
        }
    }
    // If __all__ is defined, use it as the exports list
    if (allNames) {
        // Replace exports with __all__ contents
        exports.length = 0;
        exports.push(...allNames);
    }
    return { functions, classes, imports, exports };
}
/**
 * Parse Go content and extract structural information.
 */
export function parseGo(content) {
    const lines = content.split('\n');
    const functions = [];
    const classes = [];
    const imports = [];
    const exports = [];
    // --- Extract Imports ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // Single import: import "pkg"
        const singleImport = line.match(/^\s*import\s+"([^"]+)"/);
        if (singleImport) {
            const source = singleImport[1];
            const name = source.split('/').pop() || source;
            imports.push({ source, names: [name] });
            continue;
        }
        // Block import: import ( ... )
        const blockImportStart = line.match(/^\s*import\s*\(/);
        if (blockImportStart) {
            for (let j = i + 1; j < lines.length; j++) {
                const importLine = lines[j].trim();
                if (importLine === ')')
                    break;
                // Match "pkg" or alias "pkg"
                const pkgMatch = importLine.match(/^(?:(\w+)\s+)?"([^"]+)"/);
                if (pkgMatch) {
                    const alias = pkgMatch[1];
                    const source = pkgMatch[2];
                    const name = alias || source.split('/').pop() || source;
                    imports.push({ source, names: [name] });
                }
            }
            continue;
        }
    }
    // --- Extract Types (struct/interface as classes) ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // type Name struct { or type Name interface {
        const typeMatch = line.match(/^\s*type\s+(\w+)\s+(?:struct|interface)\s*\{/);
        if (typeMatch) {
            const name = typeMatch[1];
            const startLine = i + 1;
            const endLine = findBlockEnd(lines, i);
            const isExported = /^[A-Z]/.test(name);
            // Extract methods from interface bodies
            const methods = [];
            const bodyLines = lines.slice(i + 1, endLine - 1);
            for (const bodyLine of bodyLines) {
                const methodMatch = bodyLine.match(/^\s+(\w+)\s*\(/);
                if (methodMatch) {
                    methods.push(methodMatch[1]);
                }
            }
            classes.push({ name, startLine, endLine, methods, isExported });
            if (isExported && !exports.includes(name))
                exports.push(name);
        }
    }
    // --- Extract Functions ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // func (receiver) Name(params) or func Name(params)
        const funcMatch = line.match(/^\s*func\s+(?:\(\s*\w+\s+\*?\w+\s*\)\s+)?(\w+)\s*\(([^)]*)\)/);
        if (funcMatch) {
            const name = funcMatch[1];
            const paramsStr = funcMatch[2];
            const startLine = i + 1;
            const endLine = line.includes('{') ? findBlockEnd(lines, i) : i + 1;
            const isExported = /^[A-Z]/.test(name);
            // Extract param names (Go params: name type, name type)
            const params = paramsStr
                .split(',')
                .map((p) => p.trim().split(/\s+/)[0])
                .filter((p) => p && p !== '');
            functions.push({ name, startLine, endLine, params, isExported });
            if (isExported && !exports.includes(name))
                exports.push(name);
        }
    }
    return { functions, classes, imports, exports };
}
/**
 * Parse Rust content and extract structural information.
 */
export function parseRust(content) {
    const lines = content.split('\n');
    const functions = [];
    const classes = [];
    const imports = [];
    const exports = [];
    // --- Extract Imports (use statements) ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // use path::to::item; or use path::to::{item1, item2};
        const useMatch = line.match(/^\s*(?:pub\s+)?use\s+(.+);/);
        if (useMatch) {
            const usePath = useMatch[1].trim();
            // Handle grouped imports: use std::collections::{HashMap, HashSet};
            const groupMatch = usePath.match(/^(.+)::\{([^}]+)\}/);
            if (groupMatch) {
                const basePath = groupMatch[1];
                const names = groupMatch[2].split(',').map((n) => n.trim().split(/\s+as\s+/).pop().trim()).filter(Boolean);
                imports.push({ source: basePath, names });
            }
            else {
                // Simple use: use std::collections::HashMap;
                const parts = usePath.split('::');
                const name = parts[parts.length - 1].split(/\s+as\s+/).pop().trim();
                imports.push({ source: usePath, names: [name] });
            }
            continue;
        }
    }
    // --- Extract Structs/Enums as classes ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // pub struct Name { or struct Name { or pub enum Name { or enum Name {
        const structMatch = line.match(/^\s*(pub\s+)?(?:struct|enum)\s+(\w+)/);
        if (structMatch) {
            const isExported = !!structMatch[1];
            const name = structMatch[2];
            const startLine = i + 1;
            const endLine = line.includes('{') ? findBlockEnd(lines, i) : i + 1;
            classes.push({ name, startLine, endLine, methods: [], isExported });
            if (isExported && !exports.includes(name))
                exports.push(name);
        }
    }
    // --- Extract impl blocks and their methods ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // impl Name { or impl Trait for Name {
        const implMatch = line.match(/^\s*impl\s+(?:\w+\s+for\s+)?(\w+)\s*\{/);
        if (implMatch) {
            const implName = implMatch[1];
            const implEnd = findBlockEnd(lines, i);
            // Find the class entry for this impl
            const classEntry = classes.find((c) => c.name === implName);
            // Extract methods inside impl block
            for (let j = i + 1; j < implEnd - 1; j++) {
                const bodyLine = lines[j];
                const fnMatch = bodyLine.match(/^\s*(pub\s+)?(?:async\s+)?fn\s+(\w+)\s*\(([^)]*)\)/);
                if (fnMatch) {
                    const fnIsExported = !!fnMatch[1];
                    const fnName = fnMatch[2];
                    const fnParamsStr = fnMatch[3];
                    const fnStartLine = j + 1;
                    const fnEndLine = bodyLine.includes('{') ? findBlockEnd(lines, j) : j + 1;
                    // Extract param names (skip self/&self/&mut self)
                    const params = fnParamsStr
                        .split(',')
                        .map((p) => p.trim())
                        .filter((p) => p && !p.startsWith('&') && p !== 'self' && !p.startsWith('mut self'))
                        .map((p) => p.split(':')[0].replace(/^mut\s+/, '').trim())
                        .filter(Boolean);
                    if (classEntry) {
                        classEntry.methods.push(fnName);
                    }
                    functions.push({ name: fnName, startLine: fnStartLine, endLine: fnEndLine, params, isExported: fnIsExported });
                    if (fnIsExported && !exports.includes(fnName))
                        exports.push(fnName);
                }
            }
        }
    }
    // --- Extract standalone functions (not inside impl blocks) ---
    const implRanges = [];
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        if (line.match(/^\s*impl\s+/)) {
            const end = findBlockEnd(lines, i);
            implRanges.push({ start: i, end: end - 1 });
        }
    }
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // Skip lines inside impl blocks
        const insideImpl = implRanges.some((r) => i >= r.start && i <= r.end);
        if (insideImpl)
            continue;
        // pub fn name(params) or fn name(params) or pub async fn name(params)
        const fnMatch = line.match(/^\s*(pub\s+)?(?:async\s+)?fn\s+(\w+)\s*\(([^)]*)\)/);
        if (fnMatch) {
            const isExported = !!fnMatch[1];
            const name = fnMatch[2];
            const paramsStr = fnMatch[3];
            const startLine = i + 1;
            const endLine = line.includes('{') ? findBlockEnd(lines, i) : i + 1;
            const params = paramsStr
                .split(',')
                .map((p) => p.trim())
                .filter((p) => p && !p.startsWith('&') && p !== 'self' && !p.startsWith('mut self'))
                .map((p) => p.split(':')[0].replace(/^mut\s+/, '').trim())
                .filter(Boolean);
            functions.push({ name, startLine, endLine, params, isExported });
            if (isExported && !exports.includes(name))
                exports.push(name);
        }
    }
    return { functions, classes, imports, exports };
}
/**
 * Parse Java content and extract structural information.
 */
export function parseJava(content) {
    const lines = content.split('\n');
    const functions = [];
    const classes = [];
    const imports = [];
    const exports = [];
    // --- Extract Imports ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // import package.Class; or import static package.Class.method;
        const importMatch = line.match(/^\s*import\s+(?:static\s+)?([^;]+);/);
        if (importMatch) {
            const source = importMatch[1].trim();
            const parts = source.split('.');
            const name = parts[parts.length - 1];
            imports.push({ source, names: [name] });
        }
    }
    // --- Extract Classes/Interfaces ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // public/protected/private class Name or interface Name
        const classMatch = line.match(/^\s*(?:(public|protected|private)\s+)?(?:abstract\s+)?(?:static\s+)?(?:final\s+)?(?:class|interface|enum)\s+(\w+)/);
        if (classMatch) {
            const visibility = classMatch[1];
            const name = classMatch[2];
            const startLine = i + 1;
            const endLine = findBlockEnd(lines, i);
            const isExported = visibility === 'public';
            // Extract methods within the class body
            // We need to track depth so we only match methods at the class body level (depth 1)
            const methods = [];
            let depth = 0;
            for (let j = i; j < endLine; j++) {
                const bodyLine = lines[j];
                // Check for method BEFORE counting braces on this line
                // A method declaration at class level means depth is currently 1
                if (depth === 1) {
                    const methodMatch = bodyLine.match(/^\s*(?:(?:public|protected|private)\s+)?(?:static\s+)?(?:final\s+)?(?:abstract\s+)?(?:synchronized\s+)?(?:\w+(?:<[^>]*>)?(?:\[\])*)\s+(\w+)\s*\(/);
                    if (methodMatch) {
                        const methodName = methodMatch[1];
                        if (methodName !== 'if' && methodName !== 'for' && methodName !== 'while' && methodName !== 'switch' && methodName !== 'catch') {
                            if (!methods.includes(methodName)) {
                                methods.push(methodName);
                            }
                        }
                    }
                    // Also match constructors
                    const ctorMatch = bodyLine.match(new RegExp(`^\\s*(?:(?:public|protected|private)\\s+)?${name}\\s*\\(`));
                    if (ctorMatch && !methods.includes(name)) {
                        methods.push(name);
                    }
                }
                // Count braces after checking for methods
                for (const ch of bodyLine) {
                    if (ch === '{')
                        depth++;
                    if (ch === '}')
                        depth--;
                }
            }
            classes.push({ name, startLine, endLine, methods, isExported });
            if (isExported && !exports.includes(name))
                exports.push(name);
            // Extract methods as functions too
            depth = 0;
            for (let j = i; j < endLine; j++) {
                const bodyLine = lines[j];
                if (depth === 1) {
                    const methodMatch = bodyLine.match(/^\s*(public|protected|private)?\s*(?:static\s+)?(?:final\s+)?(?:abstract\s+)?(?:synchronized\s+)?(?:\w+(?:<[^>]*>)?(?:\[\])*)\s+(\w+)\s*\(([^)]*)\)/);
                    if (methodMatch) {
                        const methodVisibility = methodMatch[1];
                        const methodName = methodMatch[2];
                        const methodParams = methodMatch[3];
                        if (methodName !== 'if' && methodName !== 'for' && methodName !== 'while' && methodName !== 'switch' && methodName !== 'catch') {
                            const fnIsExported = methodVisibility === 'public';
                            const fnStartLine = j + 1;
                            const fnEndLine = bodyLine.includes('{') ? findBlockEnd(lines, j) : j + 1;
                            // Extract param names from Java params (Type name, Type name)
                            const params = methodParams
                                .split(',')
                                .map((p) => {
                                const parts = p.trim().split(/\s+/);
                                return parts.length >= 2 ? parts[parts.length - 1] : '';
                            })
                                .filter(Boolean);
                            functions.push({ name: methodName, startLine: fnStartLine, endLine: fnEndLine, params, isExported: fnIsExported });
                            if (fnIsExported && !exports.includes(methodName))
                                exports.push(methodName);
                        }
                    }
                }
                for (const ch of bodyLine) {
                    if (ch === '{')
                        depth++;
                    if (ch === '}')
                        depth--;
                }
            }
        }
    }
    return { functions, classes, imports, exports };
}
/**
 * Parse generic content (PHP, Ruby, or unknown languages) using common patterns.
 * Falls back to empty result if nothing is detected.
 */
export function parseGeneric(content) {
    const lines = content.split('\n');
    const functions = [];
    const classes = [];
    const imports = [];
    const exports = [];
    // --- Extract Imports ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // PHP: use Namespace\Class;
        const phpUseMatch = line.match(/^\s*use\s+([^;]+);/);
        if (phpUseMatch) {
            const source = phpUseMatch[1].trim();
            const parts = source.split('\\');
            const name = parts[parts.length - 1];
            imports.push({ source, names: [name] });
            continue;
        }
        // PHP: require/include
        const phpRequireMatch = line.match(/^\s*(?:require|include)(?:_once)?\s+['"]([^'"]+)['"]/);
        if (phpRequireMatch) {
            const source = phpRequireMatch[1];
            const name = source.split('/').pop()?.replace(/\.\w+$/, '') || source;
            imports.push({ source, names: [name] });
            continue;
        }
        // Ruby: require 'gem' or require_relative 'file'
        const rubyRequireMatch = line.match(/^\s*require(?:_relative)?\s+['"]([^'"]+)['"]/);
        if (rubyRequireMatch) {
            const source = rubyRequireMatch[1];
            const name = source.split('/').pop() || source;
            imports.push({ source, names: [name] });
            continue;
        }
    }
    // --- Extract Classes ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // class Name (PHP, Ruby, etc.)
        const classMatch = line.match(/^\s*(?:(?:public|abstract|final)\s+)*class\s+(\w+)/);
        if (classMatch) {
            const name = classMatch[1];
            const startLine = i + 1;
            // Use brace counting for PHP, indentation-based for Ruby
            let endLine;
            if (line.includes('{') || (i + 1 < lines.length && lines[i + 1]?.trim() === '{')) {
                endLine = findBlockEnd(lines, i);
            }
            else {
                // Ruby-style: look for 'end' keyword at same indentation
                endLine = findRubyBlockEnd(lines, i);
            }
            // Extract methods
            const methods = [];
            for (let j = i + 1; j < endLine; j++) {
                const bodyLine = lines[j];
                const methodMatch = bodyLine.match(/^\s*(?:(?:public|protected|private)\s+)?(?:static\s+)?(?:function|def)\s+(\w+)/);
                if (methodMatch) {
                    methods.push(methodMatch[1]);
                }
            }
            classes.push({ name, startLine, endLine, methods, isExported: true });
            if (!exports.includes(name))
                exports.push(name);
        }
    }
    // --- Extract Functions ---
    for (let i = 0; i < lines.length; i++) {
        const line = lines[i];
        // Skip lines inside class bodies
        const insideClass = classes.some((c) => (i + 1) > c.startLine && (i + 1) < c.endLine);
        if (insideClass)
            continue;
        // function name( (PHP), def name( (Ruby/Python-like), fn name( (Rust-like)
        const funcMatch = line.match(/^\s*(?:(?:public|protected|private)\s+)?(?:static\s+)?(?:function|def|fn)\s+(\w+)\s*\(([^)]*)\)/);
        if (funcMatch) {
            const name = funcMatch[1];
            const paramsStr = funcMatch[2];
            const startLine = i + 1;
            let endLine;
            if (line.includes('{') || (i + 1 < lines.length && lines[i + 1]?.trim() === '{')) {
                endLine = findBlockEnd(lines, i);
            }
            else {
                // Ruby-style: look for 'end' keyword
                endLine = findRubyBlockEnd(lines, i);
            }
            const params = paramsStr
                .split(',')
                .map((p) => p.trim().replace(/^\$/, '').split(/[=:]/)[0].trim())
                .filter(Boolean);
            functions.push({ name, startLine, endLine, params, isExported: true });
            if (!exports.includes(name))
                exports.push(name);
        }
    }
    return { functions, classes, imports, exports };
}
/**
 * Find the end of a Ruby-style block (terminated by 'end' keyword at same or lower indentation).
 */
function findRubyBlockEnd(lines, startLineIndex) {
    const baseIndent = getIndentation(lines[startLineIndex]);
    for (let i = startLineIndex + 1; i < lines.length; i++) {
        const line = lines[i];
        if (line.trim() === '')
            continue;
        const indent = getIndentation(line);
        if (indent <= baseIndent && line.trim() === 'end') {
            return i + 1; // 1-indexed
        }
    }
    // If no 'end' found, return end of file
    return lines.length;
}
/**
 * Parses a source file and extracts structural information using
 * regex-based extraction (no tree-sitter dependency).
 *
 * @param filePath - Absolute path to the file to parse
 * @param language - Detected language of the file (e.g., 'typescript', 'python')
 * @returns ParseResult with extracted functions, classes, imports, and exports
 */
export function parseFile(filePath, language) {
    const content = readFileSync(filePath, 'utf-8');
    if (language === 'typescript' || language === 'javascript') {
        return parseTypeScript(content);
    }
    if (language === 'python') {
        return parsePython(content);
    }
    if (language === 'go') {
        return parseGo(content);
    }
    if (language === 'rust') {
        return parseRust(content);
    }
    if (language === 'java') {
        return parseJava(content);
    }
    // Ruby, PHP, and anything else → generic parser
    return parseGeneric(content);
}