name: Release

on:
  push:
    tags:
      - '[0-9]+.[0-9]+.[0-9]+'

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
    - uses: actions/github-script@v7
      with:
        script: |
          const latestRelease = await github.rest.repos.getLatestRelease({
            owner: context.repo.owner,
            repo: context.repo.repo,
          })
          const commits = await github.rest.repos.compareCommitsWithBasehead({
            owner: context.repo.owner,
            repo: context.repo.repo,
            basehead: `refs/tags/${latestRelease.data.tag_name}...${context.ref}`,
          })

          const groups = {
            feat: [`## Features\n`],
            fix: [`## Fixes\n`],
            docs: [`## Documentation\n`],
            experimental: [`## Experimental\n`],
            other: [`## Other changes\n`],
          }
          for (const commit of commits.data.commits) {
            const match = commit.commit.message.match(/^(?<type>\w+)\s*:\s*(?<message>.+)\n*/)
            const type = match?.groups?.type
            const message = match?.groups?.message
            if (type && message) {
              const availableType = type in groups ? type : 'other'
              const capitalized = message[0].toLocaleUpperCase() + message.slice(1)
              groups[availableType].push(`- ${capitalized} by @${commit.author.login}`)
            }
          }

          const tag_name = context.ref.slice('refs/tags/'.length)
          const fullChangelog = `**Full Changelog**: https://github.com/${context.repo.owner}/${context.repo.repo}/compare/${latestRelease.data.tag_name}...${tag_name}`
          const changelog = Object.values(groups)
            .filter(lines => lines.length > 1)
            .map(lines => lines.join('\n'))
            .concat(fullChangelog)
            .join('\n\n')
          console.info(changelog)

          await github.rest.repos.createRelease({
            owner: context.repo.owner,
            repo: context.repo.repo,
            tag_name,
            body: changelog,
          })