import * as fs from 'node:fs';
import * as path from 'node:path';
import { validateDashboard } from '../lib/dashboard-validator.js';
import { log } from './logger.js';
/** Directories to skip when recursively scanning for JSON files */
const SKIP_DIRS = new Set([
    'node_modules', '.git', 'dist', 'build', '.next', '.cache',
    '__pycache__', '.turbo', 'target', 'obj',
]);
function synthesizeMeta() {
    return {
        lastAnalyzedAt: new Date().toISOString(),
        gitCommitHash: '',
        version: '0.0.0',
        analyzedFiles: 0,
    };
}
function extractProjectName(data) {
    if (data.project &&
        typeof data.project === 'object' &&
        !Array.isArray(data.project) &&
        'name' in data.project &&
        typeof data.project.name === 'string') {
        return data.project.name;
    }
    return null;
}
function tryParseJsonFile(filePath) {
    try {
        const content = fs.readFileSync(filePath, 'utf-8');
        const parsed = JSON.parse(content);
        if (parsed === null || typeof parsed !== 'object' || Array.isArray(parsed)) {
            return { error: 'not a JSON object' };
        }
        return { data: parsed };
    }
    catch (e) {
        const message = e instanceof Error ? e.message : String(e);
        return { error: message };
    }
}
function handleSingleFile(absolutePath) {
    const parseResult = tryParseJsonFile(absolutePath);
    if ('error' in parseResult) {
        return { success: false, error: `Failed to parse ${path.basename(absolutePath)}: ${parseResult.error}` };
    }
    const validation = validateDashboard(parseResult.data);
    if (!validation.valid) {
        return {
            success: false,
            error: `${path.basename(absolutePath)} is not a valid dashboard: ${validation.errors.join(', ')}`,
        };
    }
    const projectName = extractProjectName(parseResult.data) || path.basename(absolutePath, '.json');
    const dirName = path.basename(path.dirname(absolutePath));
    const fileName = path.basename(absolutePath);
    const manifest = [
        {
            dirName,
            meta: synthesizeMeta(),
            graphFiles: [{ fileName, projectName }],
        },
    ];
    const fileMapping = {
        [`${dirName}/${fileName}`]: absolutePath,
    };
    return { success: true, manifest, fileMapping };
}
function handleProjectDirectory(dirPath, dirName) {
    const metaPath = path.join(dirPath, 'meta.json');
    const metaResult = tryParseJsonFile(metaPath);
    let meta;
    if ('error' in metaResult) {
        log('warn', `Skipping ${dirName}/meta.json: ${metaResult.error}`);
        return null;
    }
    meta = metaResult.data;
    const graphFiles = [];
    const fileMapping = {};
    // Recursively collect all valid graph .json files from this directory and subdirectories
    function scanDir(currentPath, relativePrefix) {
        let entries;
        try {
            entries = fs.readdirSync(currentPath);
        }
        catch {
            return;
        }
        for (const entry of entries) {
            const fullPath = path.join(currentPath, entry);
            let stat;
            try {
                stat = fs.statSync(fullPath);
            }
            catch {
                continue;
            }
            if (stat.isDirectory()) {
                // Skip common non-source directories
                if (SKIP_DIRS.has(entry))
                    continue;
                // Recurse into subdirectory
                const childPrefix = relativePrefix ? `${relativePrefix}/${entry}` : entry;
                scanDir(fullPath, childPrefix);
            }
            else if (stat.isFile() && entry.endsWith('.json') && entry !== 'meta.json') {
                const parseResult = tryParseJsonFile(fullPath);
                if ('error' in parseResult) {
                    continue; // Not valid JSON — silently skip
                }
                const validation = validateDashboard(parseResult.data);
                if (!validation.valid) {
                    continue; // Not a dashboard graph file — silently skip
                }
                const projectName = extractProjectName(parseResult.data) || path.basename(entry, '.json');
                // Use relative path from the project directory as the fileName for nested files
                const relativeFileName = relativePrefix ? `${relativePrefix}/${entry}` : entry;
                graphFiles.push({ fileName: relativeFileName, projectName });
                fileMapping[`${dirName}/${relativeFileName}`] = fullPath;
            }
        }
    }
    scanDir(dirPath, '');
    if (graphFiles.length === 0) {
        log('warn', `Skipping ${dirName}: no valid graph files`);
        return null;
    }
    return {
        entry: { dirName, meta, graphFiles },
        fileMapping,
    };
}
/**
 * Recursively collects all directories containing .json files,
 * skipping common non-source directories.
 * Returns a map of relative directory path → absolute directory path.
 */
function collectJsonDirs(basePath, relativePath = '') {
    const result = new Map();
    const currentPath = relativePath ? path.join(basePath, relativePath) : basePath;
    let entries;
    try {
        entries = fs.readdirSync(currentPath);
    }
    catch {
        return result;
    }
    // Check if this directory has any .json files
    let hasJsonFiles = false;
    for (const entry of entries) {
        if (entry.endsWith('.json')) {
            const filePath = path.join(currentPath, entry);
            try {
                const stat = fs.statSync(filePath);
                if (stat.isFile()) {
                    hasJsonFiles = true;
                    break;
                }
            }
            catch {
                // skip
            }
        }
    }
    if (hasJsonFiles) {
        result.set(relativePath, currentPath);
    }
    // Recurse into subdirectories
    for (const entry of entries) {
        if (SKIP_DIRS.has(entry))
            continue;
        const entryPath = path.join(currentPath, entry);
        try {
            const stat = fs.statSync(entryPath);
            if (stat.isDirectory()) {
                const childRelative = relativePath ? `${relativePath}/${entry}` : entry;
                const childResults = collectJsonDirs(basePath, childRelative);
                for (const [rel, abs] of childResults) {
                    result.set(rel, abs);
                }
            }
        }
        catch {
            // skip
        }
    }
    return result;
}
function handleFlatDirectory(dirPath) {
    const dirName = path.basename(dirPath);
    const manifest = [];
    const fileMapping = {};
    // Recursively collect all directories with .json files
    const jsonDirs = collectJsonDirs(dirPath);
    for (const [relativeDirPath, absoluteDirPath] of jsonDirs) {
        const entries = fs.readdirSync(absoluteDirPath);
        const graphFiles = [];
        for (const entry of entries) {
            if (!entry.endsWith('.json'))
                continue;
            const filePath = path.join(absoluteDirPath, entry);
            try {
                const stat = fs.statSync(filePath);
                if (!stat.isFile())
                    continue;
            }
            catch {
                continue;
            }
            const parseResult = tryParseJsonFile(filePath);
            if ('error' in parseResult) {
                continue; // Not valid JSON — silently skip
            }
            const validation = validateDashboard(parseResult.data);
            if (!validation.valid) {
                continue; // Not a dashboard graph file — silently skip
            }
            const projectName = extractProjectName(parseResult.data) || path.basename(entry, '.json');
            graphFiles.push({ fileName: entry, projectName });
            // Build the file mapping key: for top-level files use dirName/fileName,
            // for nested files use dirName/relativePath/fileName
            const mappingKey = relativeDirPath
                ? `${dirName}/${relativeDirPath}/${entry}`
                : `${dirName}/${entry}`;
            fileMapping[mappingKey] = filePath;
        }
        if (graphFiles.length > 0) {
            // Use relative path as the manifest entry dirName for nested dirs,
            // or the base dirName for top-level files
            const entryDirName = relativeDirPath
                ? `${dirName}/${relativeDirPath}`
                : dirName;
            manifest.push({
                dirName: entryDirName,
                meta: synthesizeMeta(),
                graphFiles,
            });
        }
    }
    if (manifest.length === 0) {
        return { success: false, error: `No valid dashboard files found in ${dirPath}` };
    }
    return { success: true, manifest, fileMapping };
}
/**
 * Recursively finds all directories containing a meta.json file,
 * returning their paths relative to the base directory.
 * Skips common non-source directories.
 */
function findDirsWithMetaJson(basePath, currentPath) {
    const results = [];
    let entries;
    try {
        entries = fs.readdirSync(currentPath);
    }
    catch {
        return results;
    }
    for (const entry of entries) {
        if (SKIP_DIRS.has(entry))
            continue;
        const entryPath = path.join(currentPath, entry);
        try {
            const stat = fs.statSync(entryPath);
            if (!stat.isDirectory())
                continue;
            if (fs.existsSync(path.join(entryPath, 'meta.json'))) {
                // Use relative path from basePath
                const relativePath = path.relative(basePath, entryPath);
                results.push(relativePath);
            }
            // Continue recursing to find deeper directories with meta.json
            const childResults = findDirsWithMetaJson(basePath, entryPath);
            results.push(...childResults);
        }
        catch {
            // Skip entries that can't be stat'd
        }
    }
    return results;
}
function handleNestedDirectory(dirPath, subdirs) {
    const manifest = [];
    const fileMapping = {};
    for (const subdir of subdirs) {
        const subdirPath = path.join(dirPath, subdir);
        // Use the relative path as dirName (handles nested paths like "a/b/c")
        const dirName = subdir.replace(/\\/g, '/');
        const result = handleProjectDirectory(subdirPath, dirName);
        if (result) {
            manifest.push(result.entry);
            Object.assign(fileMapping, result.fileMapping);
        }
    }
    if (manifest.length === 0) {
        return { success: false, error: `No valid dashboard files found in ${dirPath}` };
    }
    return { success: true, manifest, fileMapping };
}
export function resolveInput(inputPath) {
    const absolutePath = path.resolve(inputPath);
    let stat;
    try {
        stat = fs.statSync(absolutePath);
    }
    catch {
        return { success: false, error: `Path not found: ${inputPath}` };
    }
    // Case 1: Single file
    if (stat.isFile()) {
        return handleSingleFile(absolutePath);
    }
    // Case 2: Directory
    if (stat.isDirectory()) {
        // Check if directory itself has meta.json → project directory
        const hasMetaJson = fs.existsSync(path.join(absolutePath, 'meta.json'));
        if (hasMetaJson) {
            const dirName = path.basename(absolutePath);
            const result = handleProjectDirectory(absolutePath, dirName);
            if (!result) {
                return { success: false, error: `No valid dashboard files found in ${absolutePath}` };
            }
            return { success: true, manifest: [result.entry], fileMapping: result.fileMapping };
        }
        // Recursively check for subdirectories containing meta.json → nested directory
        const subdirsWithMeta = findDirsWithMetaJson(absolutePath, absolutePath);
        if (subdirsWithMeta.length > 0) {
            return handleNestedDirectory(absolutePath, subdirsWithMeta);
        }
        // Flat directory: has .json files but no meta.json, no nested projects
        return handleFlatDirectory(absolutePath);
    }
    return { success: false, error: `Path is not a file or directory: ${inputPath}` };
}