load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

def _helm_deps_impl(ctx):
    # 1. Read the lockfile
    lockfile_content = ctx.read(ctx.path(Label("//third_party/helm:chartfile.lock.json")))
    lock = json.decode(lockfile_content)

    # 2. Iterate over charts
    for name, info in lock.get("charts", {}).items():
        # name is like "grafana/grafana"
        # repo_name will be "helm_grafana_grafana"
        repo_name = "helm_" + name.replace("/", "_").replace("-", "_")
        chart_name = name.split("/")[1]
        
        http_archive(
            name = repo_name,
            url = info["url"],
            sha256 = info["digest"],
            strip_prefix = chart_name, 
            build_file_content = """
filegroup(
    name = "chart",
    srcs = glob(["**"]),
    visibility = ["//visibility:public"],
)
""",
        )

helm_deps = module_extension(
    implementation = _helm_deps_impl,
)