/**
 * GitHub repository statistics collector with enhanced metrics using Octokit SDK and GraphQL
 */
import { Octokit } from '@octokit/rest';
import { graphql } from '@octokit/graphql';
import * as core from '@actions/core';
const PlatformSettings = {
    name: 'GitHub',
};
const OS_MAP = {
    linux: 'linux',
    darwin: 'macos',
    mac: 'macos',
    macos: 'macos',
    windows: 'windows',
    win: 'windows',
    freebsd: 'freebsd',
};
const ARCHES = ['amd64', 'x64', 'arm64', 'armv6', '386', 'i386'];
const FORMATS = ['zip', 'tar.gz', 'tar.bz2', 'tar.xz', 'deb', 'rpm', 'msi', 'exe', 'txt', 'yaml', 'yml', 'json'];
const VARIANTS = ['docs', 'installer'];
export function parseReleaseAsset(filename) {
    const original = filename;
    let project = '';
    let os = '';
    let arch = '';
    let format = '';
    let variant = '';
    let version = '';
    // Extract format (extension)
    const extRegex = new RegExp(`\\.(${FORMATS.join('|')})$`, 'i');
    const extMatch = filename.match(extRegex);
    format = extMatch ? extMatch[1].toLowerCase() : '';
    // Remove extension and normalize separators
    const nameWithoutExt = filename.replace(extRegex, '').replace(/[_-]/g, '.');
    const parts = nameWithoutExt.split('.');
    // API / special variants detection
    const apiIndex = parts.findIndex(p => p.toLowerCase() === 'api' || p.toLowerCase() === 'nerm' || p.toLowerCase() === 'beta');
    if (apiIndex >= 0) {
        project = parts.slice(0, apiIndex).join('.');
        let varMatch = parts.slice(apiIndex).join(' ');
        // Recognize versions for API specs: nerm, nerm v2025, v3, v2024, v2025, beta
        const nermMatch = varMatch.match(/nerm(?:\s+v\d{4})?/i);
        const vDigitMatch = varMatch.match(/v\d{1,4}\b/i);
        const betaMatch = varMatch.match(/\bbeta\b/i);
        const semverMatch = varMatch.match(/\d+\.\d+(?:\.\d+)?/);
        if (nermMatch) {
            version = nermMatch[0];
        }
        else if (vDigitMatch) {
            version = vDigitMatch[0];
        }
        else if (betaMatch) {
            version = 'beta';
        }
        else if (semverMatch) {
            version = semverMatch[0];
        }
        // Do not set OS to 'api' – leave blank for API specs
        os = '';
        arch = '';
        return { project, os, arch, format, variant, version, original };
    }
    // Version detection
    for (const part of parts) {
        const semverMatch = part.match(/^v?(\d+\.\d+(\.\d+)?)$/);
        if (semverMatch) {
            version = semverMatch[1];
            break;
        }
    }
    // OS detection
    for (const part of parts) {
        const lower = part.toLowerCase();
        if (OS_MAP[lower])
            os = OS_MAP[lower];
    }
    // Arch detection
    for (const part of parts) {
        const lower = part.toLowerCase();
        if (ARCHES.includes(lower))
            arch = lower === 'x64' ? 'amd64' : lower;
    }
    // Variant detection
    for (const part of parts) {
        const lower = part.toLowerCase();
        if (VARIANTS.includes(lower))
            variant = lower;
    }
    // Project is first part if not already set
    if (!project)
        project = parts[0];
    return { project, os, arch, format, variant, version, original };
}
// Build a grouping key from parsed asset parts, excluding version and
// collapsing YAML/JSON specs to the same group by omitting the format.
function buildParsedAssetKey(parsed) {
    const parts = [];
    const project = parsed.project?.toLowerCase().trim();
    const os = parsed.os?.toLowerCase().trim();
    const arch = parsed.arch?.toLowerCase().trim();
    let variant = (parsed.variant || '').toLowerCase();
    if (parsed.version) {
        variant = variant.replace(parsed.version.toLowerCase(), '').replace(/[._-]+$/g, '').trim();
    }
    if (project)
        parts.push(project);
    if (os)
        parts.push(os);
    if (arch)
        parts.push(arch);
    if (variant)
        parts.push(variant);
    const fmt = (parsed.format || '').toLowerCase();
    if (fmt && fmt !== 'yaml' && fmt !== 'yml' && fmt !== 'json') {
        parts.push(fmt);
    }
    return parts.join('_');
}
// GraphQL query for basic repository data (without releases)
const REPOSITORY_BASIC_QUERY = `
  query RepositoryBasicData($owner: String!, $name: String!) {
    repository(owner: $owner, name: $name) {
      id
      name
      description
      homepageUrl
      stargazerCount
      forkCount
      watchers {
        totalCount
      }
      openIssues: issues(states: OPEN) {
        totalCount
      }
      closedIssues: issues(states: CLOSED) {
        totalCount
      }
      primaryLanguage {
        name
      }
      diskUsage
      createdAt
      updatedAt
      pushedAt
      defaultBranchRef {
        name
      }
      repositoryTopics(first: 10) {
        nodes {
          topic {
            name
          }
        }
      }
      licenseInfo {
        name
        spdxId
      }
    }
  }
`;
// GraphQL query for releases with download data
const RELEASES_QUERY = `
  query RepositoryReleases($owner: String!, $name: String!, $first: Int!) {
    repository(owner: $owner, name: $name) {
      releases(first: $first, orderBy: {field: CREATED_AT, direction: DESC}) {
        nodes {
          id
          tagName
          name
          description
          createdAt
          publishedAt
          releaseAssets(first: 100) {
            nodes {
              id
              name
              size
              downloadCount
              downloadUrl
            }
          }
        }
      }
    }
  }
`;
export async function collectGithub(repository) {
    try {
        const [owner, repo] = repository.split('/');
        if (!owner || !repo) {
            throw new Error(`Invalid repository format: ${repository}. Expected "owner/repo"`);
        }
        // Initialize Octokit for REST API calls
        const token = core.getInput('github-token');
        const octokit = new Octokit({
            auth: token,
            userAgent: 'usage-statistics-tracker'
        });
        if (!token) {
            console.warn('No GitHub token provided. Using unauthenticated requests (rate limited).');
        }
        // Step 1: Fetch basic repository data using GraphQL
        let graphqlData = null;
        try {
            const graphqlClient = graphql.defaults({
                headers: { authorization: token ? `token ${token}` : undefined },
            });
            const basicResponse = await graphqlClient(REPOSITORY_BASIC_QUERY, {
                owner,
                name: repo
            });
            if (basicResponse.repository) {
                graphqlData = basicResponse.repository;
            }
        }
        catch (error) {
            console.warn(`Could not fetch GitHub GraphQL basic data for ${repository}:`, error);
        }
        // Step 2: Fetch releases data
        let totalReleaseDownloads = 0;
        let latestReleaseDownloads = 0;
        let releaseCount = 0;
        let downloadRange = [];
        let latestRelease = null;
        let assetTotalsByName = {};
        let assetReleaseSeries = {};
        let assetAttributesByKey = {};
        // Additional breakdowns derived from parsed assets
        let assetTotalsByParsedKey = {};
        let totalsByOs = {};
        let totalsByArch = {};
        let totalsByFormat = {};
        let totalsByVariant = {};
        // Per-dimension per-release series for accurate trend charts
        let attributeReleaseSeries = {
            os: {},
            arch: {},
            format: {},
            variant: {},
            version: {},
        };
        try {
            const graphqlClient = graphql.defaults({
                headers: { authorization: token ? `token ${token}` : undefined },
            });
            const releasesResponse = await graphqlClient(RELEASES_QUERY, {
                owner,
                name: repo,
                first: 100
            });
            if (releasesResponse.repository?.releases?.nodes) {
                const releases = releasesResponse.repository.releases.nodes.filter(Boolean);
                releaseCount = releases.length;
                for (const release of releases) {
                    let releaseDownloads = 0;
                    if (release?.releaseAssets?.nodes) {
                        for (const asset of release.releaseAssets.nodes) {
                            if (asset) {
                                releaseDownloads += asset.downloadCount || 0;
                                const rawAssetName = asset.name;
                                const parsed = parseReleaseAsset(rawAssetName);
                                const parsedKey = buildParsedAssetKey(parsed);
                                const assetKey = parsedKey || rawAssetName.toLowerCase();
                                const assetDownloads = asset.downloadCount || 0;
                                // Skip checksum assets entirely
                                if (parsed.variant && parsed.variant.toLowerCase().includes('checksum')) {
                                    continue;
                                }
                                assetTotalsByName[assetKey] = (assetTotalsByName[assetKey] || 0) + assetDownloads;
                                assetTotalsByParsedKey[parsedKey] = (assetTotalsByParsedKey[parsedKey] || 0) + assetDownloads;
                                // Persist attribute mapping for charting by dimensions
                                if (!assetAttributesByKey[assetKey]) {
                                    assetAttributesByKey[assetKey] = {
                                        project: parsed.project || undefined,
                                        os: parsed.os || undefined,
                                        arch: parsed.arch || undefined,
                                        format: parsed.format || undefined,
                                        variant: parsed.variant || undefined,
                                        version: parsed.version || undefined,
                                    };
                                }
                                if (parsed.os)
                                    totalsByOs[parsed.os] = (totalsByOs[parsed.os] || 0) + assetDownloads;
                                if (parsed.arch)
                                    totalsByArch[parsed.arch] = (totalsByArch[parsed.arch] || 0) + assetDownloads;
                                if (parsed.format)
                                    totalsByFormat[parsed.format] = (totalsByFormat[parsed.format] || 0) + assetDownloads;
                                if (parsed.variant)
                                    totalsByVariant[parsed.variant] = (totalsByVariant[parsed.variant] || 0) + assetDownloads;
                                // Build per-dimension series over releases
                                const tag = release.tagName;
                                if (parsed.os) {
                                    if (!attributeReleaseSeries.os[parsed.os])
                                        attributeReleaseSeries.os[parsed.os] = {};
                                    attributeReleaseSeries.os[parsed.os][tag] = (attributeReleaseSeries.os[parsed.os][tag] || 0) + assetDownloads;
                                }
                                if (parsed.arch) {
                                    if (!attributeReleaseSeries.arch[parsed.arch])
                                        attributeReleaseSeries.arch[parsed.arch] = {};
                                    attributeReleaseSeries.arch[parsed.arch][tag] = (attributeReleaseSeries.arch[parsed.arch][tag] || 0) + assetDownloads;
                                }
                                if (parsed.format) {
                                    if (!attributeReleaseSeries.format[parsed.format])
                                        attributeReleaseSeries.format[parsed.format] = {};
                                    attributeReleaseSeries.format[parsed.format][tag] = (attributeReleaseSeries.format[parsed.format][tag] || 0) + assetDownloads;
                                }
                                if (parsed.variant) {
                                    if (!attributeReleaseSeries.variant[parsed.variant])
                                        attributeReleaseSeries.variant[parsed.variant] = {};
                                    attributeReleaseSeries.variant[parsed.variant][tag] = (attributeReleaseSeries.variant[parsed.variant][tag] || 0) + assetDownloads;
                                }
                                if (parsed.version) {
                                    const versionKey = parsed.version.toLowerCase();
                                    if (!attributeReleaseSeries.version[versionKey])
                                        attributeReleaseSeries.version[versionKey] = {};
                                    attributeReleaseSeries.version[versionKey][tag] = (attributeReleaseSeries.version[versionKey][tag] || 0) + assetDownloads;
                                }
                                const day = release?.publishedAt || release?.createdAt;
                                if (!assetReleaseSeries[assetKey]) {
                                    assetReleaseSeries[assetKey] = [];
                                }
                                assetReleaseSeries[assetKey].push({
                                    tagName: release.tagName,
                                    day: day || '',
                                    downloads: assetDownloads,
                                });
                            }
                        }
                    }
                    totalReleaseDownloads += releaseDownloads;
                    if (release && release === releases[0]) {
                        latestReleaseDownloads = releaseDownloads;
                        latestRelease = release.tagName;
                    }
                    if (release?.publishedAt) {
                        downloadRange.push({
                            day: release.publishedAt,
                            downloads: releaseDownloads,
                            tagName: release.tagName
                        });
                    }
                }
            }
        }
        catch (error) {
            console.warn(`Could not fetch GitHub GraphQL releases data for ${repository}:`, error);
        }
        // Fallback REST API call
        let restData = null;
        try {
            const { data: repoData } = await octokit.repos.get({ owner, repo });
            restData = repoData;
        }
        catch (error) {
            console.warn(`Could not fetch GitHub REST data for ${repository}:`, error);
        }
        const finalData = graphqlData || restData;
        if (!finalData)
            throw new Error('Could not fetch repository data from either GraphQL or REST API');
        // Repo traffic stats
        let viewsCount = 0;
        let uniqueVisitors = 0;
        let clonesCount = 0;
        if (token) {
            try {
                const { data: viewsData } = await octokit.repos.getViews({ owner, repo });
                if (viewsData) {
                    viewsCount = viewsData.count || 0;
                    uniqueVisitors = viewsData.uniques || 0;
                }
                const { data: clonesData } = await octokit.repos.getClones({ owner, repo });
                if (clonesData) {
                    clonesCount = clonesData.count || 0;
                }
            }
            catch (error) {
                console.warn(`Could not fetch GitHub traffic data for ${repository}:`, error);
            }
        }
        // Repository age and last activity
        let repositoryAge = 0;
        if (finalData.createdAt) {
            const created = new Date(finalData.createdAt);
            const now = new Date();
            repositoryAge = Math.floor((now.getTime() - created.getTime()) / (1000 * 60 * 60 * 24));
        }
        let lastActivity = 0;
        if (finalData.pushedAt) {
            const pushed = new Date(finalData.pushedAt);
            const now = new Date();
            lastActivity = Math.floor((now.getTime() - pushed.getTime()) / (1000 * 60 * 60 * 24));
        }
        return {
            platform: PlatformSettings.name,
            name: repository,
            timestamp: new Date().toISOString(),
            metrics: {
                stars: finalData.stargazerCount || finalData.stargazers_count || 0,
                forks: finalData.forkCount || finalData.forks_count || 0,
                watchers: finalData.watchers?.totalCount || finalData.watchers_count || 0,
                totalIssues: finalData.openIssues?.totalCount + finalData.closedIssues?.totalCount || 0,
                openIssues: finalData.openIssues?.totalCount || 0,
                closedIssues: finalData.closedIssues?.totalCount || 0,
                language: finalData.primaryLanguage?.name || finalData.language || null,
                size: finalData.diskUsage || finalData.size || null,
                repositoryAge,
                lastActivity,
                releaseCount,
                totalReleaseDownloads,
                latestReleaseDownloads,
                viewsCount,
                uniqueVisitors,
                latestRelease,
                clonesCount,
                topics: finalData.repositoryTopics?.nodes?.length || finalData.topics?.length || 0,
                license: finalData.licenseInfo?.name || finalData.license?.name || null,
                defaultBranch: finalData.defaultBranchRef?.name || finalData.default_branch || null,
                downloadsTotal: totalReleaseDownloads || 0,
                downloadRange,
                assetTotalsByName,
                assetReleaseSeries,
                assetTotalsByParsedKey,
                totalsByOs,
                totalsByArch,
                totalsByFormat,
                totalsByVariant,
                attributeReleaseSeries,
                assetAttributesByKey,
            }
        };
    }
    catch (error) {
        return {
            platform: PlatformSettings.name,
            name: repository,
            timestamp: new Date().toISOString(),
            metrics: {},
            error: error instanceof Error ? error.message : String(error)
        };
    }
}
export async function collectGithubBatch(repositories) {
    const results = [];
    for (const repo of repositories) {
        results.push(collectGithub(repo));
    }
    return Promise.all(results);
}