#! /usr/bin/env nix-shell
#! nix-shell -i xonsh -p xonsh awscli2
# 
# vim: ts=4 sw=4 et
#
# If the shebang line above was necessary, you probably should have used
# the flake, instead. But that's okay! You're valid. <3
#
""" Lix installer uploader. 

Uploads our installers and install script to an S3 instance.
"""

import sys
import argparse
import functools

# Specify the platforms we want to build for.
TARGET_PLATFORMS = {
    "aarch64-apple-darwin": "aarch64-darwin",
    "x86_64-apple-darwin": "x86_64-darwin",
    "aarch64-unknown-linux-musl": "aarch64-linux",
    "x86_64-unknown-linux-musl": "x86_64-linux",

}

# Helpers functions.
printerr = functools.partial(print, file=sys.stderr)

#
# Arguments -- parsed while you wait!
#
parser = argparse.ArgumentParser(description="upload a lix-installer binary")
parser.add_argument("tag",              help="the tag name to use while uploading")
parser.add_argument("folder",           help="the results folder to use for uploading")
parser.add_argument("--make-default",   help="makes this version the default for new installations", 
                                        action="store_true")
parser.add_argument("-E", "--endpoint", help="the endpoint URL to use for S3", default="https://s3.lix.systems")
parser.add_argument("-R", "--region",   help="the region to use for the S3 upload", default="garage")
parser.add_argument("-B", "--bucket",   help="the s3 bucket to target", default="install")
parser.add_argument("--force",          help="allows overwriting an existing tag", action="store_true")
args = parser.parse_args()

# Extract our AWS command arguments from our argparse ones.
path_for = lambda platform : pf"{args.folder}/lix-installer-{platform}"
aws_args = [
    "--endpoint-url",
    args.endpoint,
    "--region",
    args.region
]

# Validate that we have the environment variables necessary to build.
if ('AWS_ACCESS_KEY_ID' not in ${...}) or ('AWS_SECRET_ACCESS_KEY' not in ${...}):
    printerr("ERROR: the AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY environment variables must be set")
    sys.exit(-1)


#
# First, make sure we have all of the artifacts that we need before we start.
#
found_all_files = True
for platform in TARGET_PLATFORMS:
    if not path_for(platform).exists():
        printerr(f"ERROR: {platform} installer not found in {path_for(platform)}\n")
        found_all_files = False

if not found_all_files:
    printerr("Aborting due to missing results. Perhaps you want to run `build-all.xsh`?\n")
    sys.exit(-2)

#
# Next, handle our uploads.
#
tag             = args.tag
bucket          = args.bucket
folder          = args.folder
target_path     = f"s3://{bucket}/lix/{tag}"
default_path    = f"s3://{bucket}/lix"

# First, check to ensure that the relevant tag does not exist.
tag_exists = !(aws s3 @(aws_args) ls @(target_path))
if tag_exists:
    if args.force:
        printerr(f"WARNING: Overwriting existing tag '{tag}' due to --force!")
    else:
        printerr(f"ERROR: Tag '{tag}' already exists! Refusing to overwrite without --force.\n")
        sys.exit(-3)


# From this point forward, fail if any of our subcommands do.
$RAISE_SUBPROC_ERROR=True

# Copy the core inner pieces...
printerr(f"\n>> Uploading tag '{tag}' from folder '{folder}'.") 
for in_filename, out_filename in TARGET_PLATFORMS.items():
    aws s3 @(aws_args) cp @(folder)/lix-installer-@(in_filename) @(target_path)/lix-installer-@(out_filename) --acl public-read

# ... and, if requested, copy the pieces that make this the default.
if args.make_default:
    printerr(f"\n>> Installing {tag} as the default install provider.")
    for in_filename, out_filename in TARGET_PLATFORMS.items():
        aws s3 @(aws_args) cp @(folder)/lix-installer-@(in_filename) @(default_path)/lix-installer-@(out_filename) --acl public-read

    printerr(f"\n>> Updating base install script...")
    aws s3 @(aws_args) cp lix-installer.sh @(default_path) --acl public-read

# Make sure all of our lines are out.
sys.stderr.flush()