module main

import veb
import os

@['/:username/:repo_name/tag/:tag/:format']
pub fn (mut app App) handle_download_tag_archive(username string, repo_name string, tag string, format string) veb.Result {
    // access checking will be implemented in another module
    user := app.get_user_by_username(username) or { return ctx.not_found() }
    repo := app.find_repo_by_name_and_user_id(repo_name, user.id) or { return ctx.not_found() }

    if !app.can_read_repo(ctx, repo) {
        return ctx.not_found()
    }

    archive_abs_path := os.abs_path(app.config.archive_path)
    snapshot_format := if format == 'zip' { 'zip' } else { 'tar.gz' }
    snapshot_name := '${username}_${repo_name}_${tag}.${snapshot_format}'
    archive_path := '${archive_abs_path}/${snapshot_name}'

    if format == 'zip' {
        repo.archive_tag(tag, archive_path, .zip)
    } else {
        repo.archive_tag(tag, archive_path, .tar)
    }

    archive_content := os.read_file(archive_path) or { return ctx.not_found() }

    return app.send_file(mut ctx, snapshot_name, archive_content)
}