#!/usr/bin/env bash
#  vim:ts=4:sts=4:sw=4:et
#
#  Author: Hari Sekhon
#  Date: 2020-02-13 15:36:35 +0000 (Thu, 13 Feb 2020)
#
#  https://github.com/HariSekhon/DevOps-Bash-tools
#
#  License: see accompanying Hari Sekhon LICENSE file
#
#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
#
#  https://www.linkedin.com/in/HariSekhon
#

set -euo pipefail
[ -n "${DEBUG:-}" ] && set -x
srcdir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# shellcheck disable=SC1090,SC1091
. "$srcdir/lib/utils.sh"

# shellcheck disable=SC1090,SC1091
. "$srcdir/lib/git.sh"

# shellcheck disable=SC2034,SC2154
usage_description="
Sets up Git remotes to one or more of the major public Git Repos - GitHub, GitLab, Bitbucket or Azure DevOps

Useful to:

1. easily pull / push to each provider by name
2. fetch and merge updates from all Repo providers via a single command:

    git pull --all

See Also:

    git_remotes_set_multi_origin.sh  - for push to all
    git_sync_repos_upstream.sh       - for sync'ing all repos to another provider
"

# used by usage() in lib/utils.sh
# shellcheck disable=SC2034
usage_args="github|gitlab|bitbucket|azure|all"

help_usage "$@"

no_more_opts "$@"

min_args 1 "$@"

name="${1:-}"

if [ -z "$name" ]; then
    usage
fi

add_remote_repo(){
    local name="$1"
    local domain="unconfigured"
    # used by log statements
    # shellcheck disable=SC2034
    local VERBOSE=1
    if git remote -v | grep -Eq "^${name}[[:space:]]"; then
        log "$name remote already configured, skipping..."
        return 0
    fi
    # loads domain and variables user and token if available via environment variables
    git_provider_env "$name"
    log "$name remote not configured, configuring..."
    set +o pipefail
    url="$(git remote -v | awk '{print $2}' | grep -Ei "$domain" | head -n 1)"
    if [ -n "$url" ]; then
        log "copied existing remote url for $name as is including any access tokens to named remote $name"
    else
        url="$(git remote -v | awk '{print $2}' | grep -Ei 'bitbucket.org|github.com|gitlab.com|dev.azure.com' | head -n 1 | perl -pe "s/^((\\w+:\\/\\/)?(git@)?)(.+@)?[^\\/:]+/\$1$domain/")"
        # XXX: Azure DevOps has non-uniform URLs compared to the 3 main Git repos
        if [ "$name" = "azure" ]; then
            url="$(git_to_azure_url "$url")"
        else
            # undo weird Azure DevOps url components if we happen to infer URL from an Azure DevOps url
            url="$(azure_to_git_url "$url")"
        fi
        # XXX: shouldn't really print full url below in case it has an http access token in it that we don't want appearing as plaintext on the screen
        log "inferring $name URL to be $url"
        log "adding remote $name with url $url"
        if [[ "$url" =~ ^https:// ]]; then
            if [ -n "${user:-}" ] && [ -n "${token:-}" ]; then
                log "added authentication credentials from environment"
                url="https://$user:$token@${url##https://}"
            fi
        elif ! [[ "$url" =~ git@ ]]; then
            url="git@${url##ssh:\/\/}"
        fi
    fi
    set -o pipefail
    git remote add "$name" "$url"
    #log "pulling from $name to merge if necessary"
    #git pull --no-edit "$name" master
    #log "pushing to $name remote"
    #git push "$name" master
}

if [ "$name" = "github" ] ||
   [ "$name" = "gitlab" ] ||
   [ "$name" = "bitbucket" ] ||
   [ "$name" = "azure" ]; then
    add_remote_repo "$name"
    echo >&2
    git remote -v | sed 's|://.*@|://|'
elif [ "$name" = "all" ]; then
    for name in github gitlab bitbucket azure; do
        add_remote_repo "$name"
    done
    echo >&2
    git remote -v | sed 's|://.*@|://|'
else
    usage
fi