# Runs the repo's /is prompt against an issue when the `pi-analyze` label is added
# or when a staff member comments `@issuron analyze` anywhere on an issue.
#
# Comment triggers can include one `#run-on-*` tag anywhere in the text:
#   @issuron analyze #run-on-linux    -> ubuntu-latest (default)
#   @issuron analyze #run-on-windows  -> windows-latest
#   @issuron analyze #run-on-mac      -> macos-latest
#
# Label triggers always run on the default Linux runner. Runner selection is
# intentionally restricted to hardcoded aliases in the authorization step.
#
# Setup required before this works:
#   1. Create a `pi-analyze` GitHub environment on the repo and add a
#      `PI_AUTH_JSON` secret containing the contents of a pi auth.json
#      (~/.pi/agent/auth.json).
#   2. Create the `pi-analyze` label.
#   3. Add a repository secret `EARENDIL_ORG_READ_TOKEN` with permission to
#      read `earendil-works` org membership. The authorization job uses it to
#      verify that the label actor is an active member of `earendil-works/staff`.
#   4. Add an environment secret `PI_GIST_TOKEN` on `pi-analyze` with gist
#      creation permission. The analysis job uses it to upload the exported
#      session gist.
#   5. Add an environment secret `PI_AUTH_UPDATE_TOKEN` on `pi-analyze` with
#      permission to update this repo's environment secrets. The analysis job
#      uses it to write back refreshed `PI_AUTH_JSON` contents.
#
# The selected runner must have Node.js support plus gh, fd, and ripgrep. GitHub
# hosted runners are bootstrapped below; future self-hosted aliases should have
# those dependencies preinstalled or installable by the setup steps.
#
# The session runs in a high-entropy checkout directory so the recorded cwd is
# a unique string. Import the session into a local checkout with the
# /ir extension command (.pi/extensions/import-repro.ts):
#   pi "/ir <gist-id | gist-url | pi.dev/session URL>"

name: Issue Analysis

on:
  issues:
    types: [labeled]
  issue_comment:
    types: [created]

permissions:
  contents: read
  issues: write

concurrency:
  group: issue-analysis-${{ github.event.issue.number }}
  cancel-in-progress: false

jobs:
  authorize:
    runs-on: ubuntu-latest
    outputs:
      should_run: ${{ steps.verify.outputs.should_run }}
      extra_instructions: ${{ steps.verify.outputs.extra_instructions }}
      runs_on: ${{ steps.verify.outputs.runs_on }}
      runner_os: ${{ steps.verify.outputs.runner_os }}
      runner_profile: ${{ steps.verify.outputs.runner_profile }}
    steps:
      - name: Verify sender permission
        id: verify
        uses: actions/github-script@v7
        env:
          ORG_READ_TOKEN: ${{ secrets.EARENDIL_ORG_READ_TOKEN }}
        with:
          script: |
            const ANALYZE_LABEL = 'pi-analyze';
            const TRIGGER_RE = /@issuron\s+analyze\b/i;
            const RUN_ON_TAG_RE = /#run-on-([a-z0-9][a-z0-9_-]*)\b/gi;
            const RUNNER_PROFILES = {
              linux: { runsOn: 'ubuntu-latest', os: 'linux' },
              windows: { runsOn: 'windows-latest', os: 'windows' },
              mac: { runsOn: 'macos-latest', os: 'macos' },
            };
            const RUN_ON_ALIASES = {
              linux: 'linux',
              ubuntu: 'linux',
              'ubuntu-latest': 'linux',
              windows: 'windows',
              win: 'windows',
              'windows-latest': 'windows',
              mac: 'mac',
              macos: 'mac',
              darwin: 'mac',
              'macos-latest': 'mac',
            };

            const username = context.payload.sender.login;
            let extraInstructions = '';
            let runnerProfile = 'linux';

            core.setOutput('should_run', 'false');
            core.setOutput('extra_instructions', '');
            core.setOutput('runs_on', JSON.stringify(RUNNER_PROFILES.linux.runsOn));
            core.setOutput('runner_os', RUNNER_PROFILES.linux.os);
            core.setOutput('runner_profile', runnerProfile);

            if (context.eventName === 'issues') {
              if (context.payload.action !== 'labeled' || context.payload.label?.name !== ANALYZE_LABEL) {
                console.log('Not a pi-analyze label event');
                return;
              }
            } else if (context.eventName === 'issue_comment') {
              if (context.payload.issue.pull_request) {
                console.log('Ignoring pull request comment');
                return;
              }
              const body = context.payload.comment.body || '';
              if (!TRIGGER_RE.test(body)) {
                console.log('Comment does not contain an @issuron analyze trigger');
                return;
              }

              const resolvedProfiles = new Set();
              const unknownTags = [];
              for (const match of body.matchAll(RUN_ON_TAG_RE)) {
                const tag = match[1].toLowerCase();
                const resolved = RUN_ON_ALIASES[tag];
                if (!resolved) {
                  unknownTags.push(tag);
                } else {
                  resolvedProfiles.add(resolved);
                }
              }

              if (unknownTags.length > 0) {
                core.setFailed(`Unknown issue analysis runner tag(s): ${unknownTags.map((tag) => `#run-on-${tag}`).join(', ')}`);
                return;
              }
              if (resolvedProfiles.size > 1) {
                core.setFailed(
                  `Conflicting issue analysis runner tags: ${Array.from(resolvedProfiles)
                    .map((profile) => `#run-on-${profile}`)
                    .join(', ')}`,
                );
                return;
              }

              runnerProfile = Array.from(resolvedProfiles)[0] || 'linux';
              extraInstructions = body.replace(TRIGGER_RE, ' ').replace(RUN_ON_TAG_RE, ' ').trim();
            } else {
              console.log(`Unsupported event: ${context.eventName}`);
              return;
            }

            async function removeTriggerLabel() {
              if (context.eventName !== 'issues') return;
              try {
                await github.rest.issues.removeLabel({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: context.issue.number,
                  name: ANALYZE_LABEL,
                });
              } catch (error) {
                if (error.status !== 404) throw error;
              }
            }

            if (!process.env.ORG_READ_TOKEN) {
              await removeTriggerLabel();
              core.setFailed('EARENDIL_ORG_READ_TOKEN is not configured; refusing to run issue analysis.');
              return;
            }

            try {
              const response = await fetch(
                `https://api.github.com/orgs/earendil-works/teams/staff/memberships/${encodeURIComponent(username)}`,
                {
                  headers: {
                    Accept: 'application/vnd.github+json',
                    Authorization: `Bearer ${process.env.ORG_READ_TOKEN}`,
                    'X-GitHub-Api-Version': '2022-11-28',
                  },
                },
              );

              if (response.status === 404) {
                await removeTriggerLabel();
                core.setFailed(`@${username} is not an active earendil-works/staff member.`);
                return;
              }

              if (!response.ok) {
                const body = await response.text();
                await removeTriggerLabel();
                core.setFailed(
                  `Could not verify earendil-works/staff membership for @${username}: HTTP ${response.status} ${body}`,
                );
                return;
              }

              const membership = await response.json();
              if (membership.state !== 'active') {
                await removeTriggerLabel();
                core.setFailed(`@${username} is not an active earendil-works/staff member.`);
                return;
              }
              console.log(`earendil-works/staff membership for @${username}: ${membership.state}`);
            } catch (error) {
              await removeTriggerLabel();
              core.setFailed(
                `Could not verify earendil-works/staff membership for @${username}: ${
                  error instanceof Error ? error.message : String(error)
                }`,
              );
              return;
            }

            const { data } = await github.rest.repos.getCollaboratorPermissionLevel({
              owner: context.repo.owner,
              repo: context.repo.repo,
              username,
            });
            if (!['admin', 'write'].includes(data.permission)) {
              await removeTriggerLabel();
              core.setFailed(
                `@${username} has '${data.permission}' permission; write or admin is required to trigger issue analysis.`,
              );
              return;
            }

            if (context.eventName === 'issue_comment') {
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                labels: [ANALYZE_LABEL],
              });
            }

            const profile = RUNNER_PROFILES[runnerProfile];
            console.log(`Selected issue analysis runner profile: ${runnerProfile} (${JSON.stringify(profile.runsOn)})`);
            core.setOutput('should_run', 'true');
            core.setOutput('extra_instructions', extraInstructions);
            core.setOutput('runs_on', JSON.stringify(profile.runsOn));
            core.setOutput('runner_os', profile.os);
            core.setOutput('runner_profile', runnerProfile);

  analyze:
    needs: authorize
    if: needs.authorize.outputs.should_run == 'true'
    runs-on: ${{ fromJSON(needs.authorize.outputs.runs_on) }}
    environment: pi-analyze
    timeout-minutes: 45
    concurrency:
      group: issue-analysis-pi-auth
      cancel-in-progress: false
    env:
      ISSUE_ANALYSIS_MODEL: openai-codex/gpt-5.5
      ISSUE_ANALYSIS_THINKING: high
    steps:
      - name: Create high-entropy working directory name
        id: workdir
        uses: actions/github-script@v7
        with:
          script: |
            const crypto = require('crypto');
            core.setOutput('name', `pi-ci-${crypto.randomBytes(16).toString('hex')}`);

      - name: Checkout
        uses: actions/checkout@v4
        with:
          path: ${{ steps.workdir.outputs.name }}

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 22
          cache: npm
          cache-dependency-path: ${{ steps.workdir.outputs.name }}/package-lock.json

      - name: Install system dependencies (Linux)
        if: needs.authorize.outputs.runner_os == 'linux'
        run: |
          sudo apt-get update
          sudo apt-get install -y fd-find ripgrep
          sudo ln -sf "$(which fdfind)" /usr/local/bin/fd

      - name: Install system dependencies (macOS)
        if: needs.authorize.outputs.runner_os == 'macos'
        run: |
          if ! command -v fd >/dev/null 2>&1; then
            brew install fd
          fi
          if ! command -v rg >/dev/null 2>&1; then
            brew install ripgrep
          fi

      - name: Install system dependencies (Windows)
        if: needs.authorize.outputs.runner_os == 'windows'
        shell: pwsh
        run: |
          $packages = @()
          if (-not (Get-Command fd -ErrorAction SilentlyContinue)) {
            $packages += "fd"
          }
          if (-not (Get-Command rg -ErrorAction SilentlyContinue)) {
            $packages += "ripgrep"
          }
          if ($packages.Count -gt 0) {
            if (-not (Get-Command choco -ErrorAction SilentlyContinue)) {
              throw "fd and ripgrep must be installed on Windows runners, or Chocolatey must be available to install them."
            }
            choco install $packages -y --no-progress
          }
          fd --version
          rg --version

      - name: Install dependencies
        working-directory: ${{ steps.workdir.outputs.name }}
        run: npm ci --ignore-scripts

      - name: Build
        working-directory: ${{ steps.workdir.outputs.name }}
        run: npm run build

      - name: Write auth.json
        id: write_auth
        uses: actions/github-script@v7
        env:
          PI_AUTH_JSON: ${{ secrets.PI_AUTH_JSON }}
        with:
          script: |
            const fs = require('fs');
            const path = require('path');

            const authJson = process.env.PI_AUTH_JSON;
            if (!authJson) {
              throw new Error('PI_AUTH_JSON secret is not configured for the pi-analyze environment');
            }

            const agentDir = path.join(process.env.RUNNER_TEMP, 'pi-agent');
            fs.mkdirSync(agentDir, { recursive: true });
            const authPath = path.join(agentDir, 'auth.json');
            fs.writeFileSync(authPath, authJson, { mode: 0o600 });
            if (process.platform !== 'win32') {
              fs.chmodSync(authPath, 0o600);
            }

      - name: Run pi /is
        uses: actions/github-script@v7
        env:
          PI_CODING_AGENT_DIR: ${{ runner.temp }}/pi-agent
          GH_TOKEN: ${{ github.token }}
          ISSUE_URL: ${{ github.event.issue.html_url }}
          EXTRA_INSTRUCTIONS: ${{ needs.authorize.outputs.extra_instructions }}
          WORKDIR: ${{ steps.workdir.outputs.name }}
        with:
          script: |
            const fs = require('fs');
            const path = require('path');
            const { spawn } = require('child_process');

            const workdir = path.join(process.env.GITHUB_WORKSPACE, process.env.WORKDIR);
            const outDir = path.join(process.env.RUNNER_TEMP, 'pi-out');
            const sessionDir = path.join(outDir, 'session');
            fs.mkdirSync(sessionDir, { recursive: true });

            let prompt = `/is ${process.env.ISSUE_URL}`;
            if (process.env.EXTRA_INSTRUCTIONS) {
              prompt += '\n\nAdditional instructions from @issuron analyze comment:\n';
              prompt += process.env.EXTRA_INSTRUCTIONS;
            }

            const outputPath = path.join(outDir, 'output.md');
            const output = fs.createWriteStream(outputPath);
            const args = [
              'packages/coding-agent/src/cli.ts',
              '-p',
              '--approve',
              '--session-dir',
              sessionDir,
              '--model',
              process.env.ISSUE_ANALYSIS_MODEL,
              '--thinking',
              process.env.ISSUE_ANALYSIS_THINKING,
              prompt,
            ];

            const exitCode = await new Promise((resolve, reject) => {
              const child = spawn('node', args, {
                cwd: workdir,
                env: process.env,
                stdio: ['ignore', 'pipe', 'pipe'],
              });
              child.stdout.on('data', (chunk) => {
                process.stdout.write(chunk);
                output.write(chunk);
              });
              child.stderr.on('data', (chunk) => {
                process.stderr.write(chunk);
              });
              child.on('error', reject);
              child.on('close', resolve);
            });
            await new Promise((resolve) => output.end(resolve));

            if (exitCode !== 0) {
              throw new Error(`pi /is failed with exit code ${exitCode}`);
            }

      - name: Persist refreshed auth.json
        if: always() && steps.write_auth.outcome == 'success'
        uses: actions/github-script@v7
        env:
          GH_TOKEN: ${{ secrets.PI_AUTH_UPDATE_TOKEN }}
          PI_CODING_AGENT_DIR: ${{ runner.temp }}/pi-agent
        with:
          script: |
            const fs = require('fs');
            const path = require('path');
            const { spawn } = require('child_process');

            if (!process.env.GH_TOKEN) {
              throw new Error('PI_AUTH_UPDATE_TOKEN is not configured for the pi-analyze environment');
            }

            const authPath = path.join(process.env.PI_CODING_AGENT_DIR, 'auth.json');
            if (!fs.existsSync(authPath)) {
              core.warning('auth.json was not created; skipping auth persistence');
              return;
            }

            const authJson = fs.readFileSync(authPath, 'utf8');
            let parsed;
            try {
              parsed = JSON.parse(authJson);
            } catch (error) {
              throw new Error(`Refusing to persist malformed auth.json: ${error instanceof Error ? error.message : String(error)}`);
            }

            const codexAuth = parsed['openai-codex'];
            if (codexAuth?.type !== 'oauth' || typeof codexAuth.refresh !== 'string' || codexAuth.refresh.length === 0) {
              throw new Error('Refusing to persist auth.json without openai-codex OAuth refresh credentials');
            }

            await new Promise((resolve, reject) => {
              const child = spawn(
                'gh',
                ['secret', 'set', 'PI_AUTH_JSON', '--env', 'pi-analyze', '--repo', process.env.GITHUB_REPOSITORY],
                { env: process.env, stdio: ['pipe', 'inherit', 'inherit'] },
              );
              child.stdin.end(authJson);
              child.on('error', reject);
              child.on('close', (code) => {
                if (code === 0) {
                  resolve();
                } else {
                  reject(new Error(`gh secret set failed with exit code ${code}`));
                }
              });
            });

      - name: Export session files
        id: export_session_files
        if: always()
        uses: actions/github-script@v7
        env:
          PI_CODING_AGENT_DIR: ${{ runner.temp }}/pi-agent
          WORKDIR: ${{ steps.workdir.outputs.name }}
        with:
          script: |
            const fs = require('fs');
            const path = require('path');
            const { spawn } = require('child_process');

            function findFirstJsonl(dir) {
              if (!fs.existsSync(dir)) return undefined;
              const entries = fs.readdirSync(dir, { withFileTypes: true });
              for (const entry of entries) {
                const entryPath = path.join(dir, entry.name);
                if (entry.isDirectory()) {
                  const nested = findFirstJsonl(entryPath);
                  if (nested) return nested;
                } else if (entry.isFile() && entry.name.endsWith('.jsonl')) {
                  return entryPath;
                }
              }
              return undefined;
            }

            const outDir = path.join(process.env.RUNNER_TEMP, 'pi-out');
            const sessionFile = findFirstJsonl(path.join(outDir, 'session'));
            if (!sessionFile) {
              throw new Error('No session jsonl file found');
            }

            const sessionJsonl = path.join(outDir, 'session.jsonl');
            const sessionHtml = path.join(outDir, 'session.html');
            fs.copyFileSync(sessionFile, sessionJsonl);

            const workdir = path.join(process.env.GITHUB_WORKSPACE, process.env.WORKDIR);
            const exitCode = await new Promise((resolve, reject) => {
              const child = spawn(
                'node',
                ['packages/coding-agent/src/cli.ts', '--no-extensions', '--export', sessionJsonl, sessionHtml],
                { cwd: workdir, env: process.env, stdio: 'inherit' },
              );
              child.on('error', reject);
              child.on('close', resolve);
            });
            if (exitCode !== 0) {
              throw new Error(`session export failed with exit code ${exitCode}`);
            }

      - name: Upload session gist
        id: gist
        if: always() && steps.export_session_files.outcome == 'success'
        uses: actions/github-script@v7
        env:
          PI_GIST_TOKEN: ${{ secrets.PI_GIST_TOKEN }}
        with:
          github-token: ${{ secrets.PI_GIST_TOKEN }}
          script: |
            const fs = require('fs');
            const path = require('path');

            if (!process.env.PI_GIST_TOKEN) {
              throw new Error('PI_GIST_TOKEN is not configured');
            }

            const outDir = path.join(process.env.RUNNER_TEMP, 'pi-out');
            const files = {};
            for (const filename of ['session.html', 'session.jsonl']) {
              files[filename] = { content: fs.readFileSync(path.join(outDir, filename), 'utf8') };
            }

            const response = await github.rest.gists.create({
              public: false,
              files,
            });
            const gistUrl = response.data.html_url;
            const gistId = response.data.id;
            core.setOutput('url', gistUrl);
            core.setOutput('id', gistId);
            core.setOutput('share_url', `https://pi.dev/session/#${gistId}`);

      - name: Comment with session import instructions
        if: always() && steps.gist.outcome == 'success'
        uses: actions/github-script@v7
        env:
          GIST_URL: ${{ steps.gist.outputs.url }}
          GIST_ID: ${{ steps.gist.outputs.id }}
          SHARE_URL: ${{ steps.gist.outputs.share_url }}
          SESSION_JSONL: ${{ runner.temp }}/pi-out/session.jsonl
        with:
          script: |
            const fs = require('fs');

            function extractLastAgentMessage(sessionPath) {
              const lines = fs.readFileSync(sessionPath, 'utf8').split(/\r?\n/).filter(Boolean);
              let lastText = '';

              for (const line of lines) {
                let entry;
                try {
                  entry = JSON.parse(line);
                } catch {
                  continue;
                }

                if (entry.type !== 'message' || entry.message?.role !== 'assistant') continue;

                const content = entry.message.content;
                const parts = [];
                if (typeof content === 'string') {
                  parts.push(content);
                } else if (Array.isArray(content)) {
                  for (const block of content) {
                    if (block?.type === 'text' && typeof block.text === 'string') {
                      parts.push(block.text);
                    }
                  }
                }

                const text = parts.join('\n\n').trim();
                if (text) lastText = text;
              }

              if (!lastText) return '_No assistant output found._';
              const maxLength = 55000;
              if (lastText.length <= maxLength) return lastText;
              return `${lastText.slice(0, maxLength)}\n\n_[truncated]_`;
            }

            const gistUrl = process.env.GIST_URL;
            const gistId = process.env.GIST_ID;
            const shareUrl = process.env.SHARE_URL;
            const lastAgentMessage = extractLastAgentMessage(process.env.SESSION_JSONL);
            const body = [
              'Pi issue analysis finished.',
              '',
              `Share URL: ${shareUrl}`,
              `Gist: ${gistUrl}`,
              '',
              'Continue locally from a checkout with:',
              '',
              '```sh',
              `pi "/ir ${gistId}"`,
              '```',
              '',
              '<details>',
              '<summary>Agent analysis summary</summary>',
              '',
              lastAgentMessage,
              '',
              '</details>',
            ].join('\n');

            await github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body,
            });

      - name: Remove trigger label
        if: always()
        uses: actions/github-script@v7
        with:
          script: |
            try {
              await github.rest.issues.removeLabel({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: context.issue.number,
                name: 'pi-analyze',
              });
            } catch (error) {
              if (error.status !== 404) throw error;
            }