#!/usr/bin/env bash
set -euo pipefail

for command in bun curl jq sha256sum tar; do
    command -v "$command" >/dev/null || { printf 'Required command not found: %s\n' "$command" >&2; exit 1; }
done

config="${OPENCODE_CONFIG_DIR:-${XDG_CONFIG_HOME:-$HOME/.config}/opencode}"
mkdir -p "$config"
config=$(cd "$config" && pwd -P)
mkdir -p "$config/plugins"
install=$(mktemp -d "$config/install.stanp-opencode.XXXXXXXX")
cleanup() {
    if [[ -n "$install" ]]; then rm -rf "$install"; fi
}
trap cleanup EXIT

api='https://git.krtss.de/api/v1/repos/StanPonomarev/stanp-opencode/releases/latest'
curl --fail-with-body --silent --show-error --location --proto '=https' --proto-redir '=https' "$api" -o "$install/release.json"
for asset in stanp-opencode.tgz stanp-opencode.tgz.sha256; do
    url=$(jq -er --arg name "$asset" '[.assets[] | select(.name == $name)] | if length == 1 then .[0] | select((.id | type) == "number" and (.browser_download_url | type) == "string" and (.browser_download_url | startswith("https://"))) | "\(.browser_download_url)?asset_id=\(.id)" else error("Missing or duplicate release asset: " + $name) end' "$install/release.json")
    curl --fail-with-body --silent --show-error --location --proto '=https' --proto-redir '=https' "$url" -o "$install/$asset"
done
read -r checksum _ < "$install/stanp-opencode.tgz.sha256"
if [[ ! "$checksum" =~ ^[a-fA-F0-9]{64}$ ]]; then
    printf 'Invalid release checksum\n' >&2
    exit 1
fi
hash_output=$(sha256sum "$install/stanp-opencode.tgz")
read -r actual _ <<< "$hash_output"
if [[ ! "$actual" =~ ^[a-fA-F0-9]{64}$ || "$actual" != "$checksum" ]]; then
    printf 'Release checksum mismatch; installation unchanged\n' >&2
    exit 1
fi

tar -xzf "$install/stanp-opencode.tgz" -C "$install"
bun -e '
    if (!await Bun.file(process.argv[1]).exists()) {
        throw new Error("Latest release lacks the OpenCode V2 directory entrypoint. Publish a V2-compatible release first.");
    }
    const { default: plugin } = await import(process.argv[1]);
    if (!plugin || plugin.id !== "stanp-opencode" || typeof plugin.setup !== "function") {
        throw new Error("Latest release is not a native OpenCode V2 plugin. Publish a V2-compatible release first.");
    }
' "$install/package/dist/index.js"

tag=$(jq -r '.tag_name' "$install/release.json")
if ! mv -f "$install/package/dist/index.js" "$config/plugins/stanp-opencode.js"; then
    printf 'Could not activate plugin; installation unchanged\n' >&2
    exit 1
fi
if [[ -L "$config/plugins/stanp-opencode" ]]; then
    rm -f "$config/plugins/stanp-opencode"
fi
printf 'Installed stanp-opencode %s into %s/plugins/stanp-opencode.js\nRestart opencode2 to load it.\n' "$tag" "$config"