#!/bin/bash

set -eu

STATE_DIR="${FAKE_CONTAINER_STATE:?FAKE_CONTAINER_STATE is required}"
mkdir -p \
    "${STATE_DIR}/containers" \
    "${STATE_DIR}/running" \
    "${STATE_DIR}/networks" \
    "${STATE_DIR}/volumes" \
    "${STATE_DIR}/unowned/container" \
    "${STATE_DIR}/unowned/network" \
    "${STATE_DIR}/unowned/volume"

list_names() {
    local directory=$1
    local path

    for path in "${directory}"/*; do
        [[ -e "${path}" ]] || continue
        basename "${path}"
    done
}

last_argument() {
    local value=""

    for value in "$@"; do :; done
    printf '%s\n' "${value}"
}

inspect_resource() {
    local resource_type=$1
    local resource_name=$2
    local label_value="apple-container"
    local address="192.168.65.4/24"

    if [[ -e "${STATE_DIR}/unowned/${resource_type}/${resource_name}" ]]; then
        label_value="other"
    fi
    case "${resource_name}" in
        sub2api-apple-postgres) address="192.168.65.2/24" ;;
        sub2api-apple-redis) address="192.168.65.3/24" ;;
    esac

    printf '[{"configuration":{"labels":{"org.sub2api.stack":"%s"}},"status":{"networks":[{"ipv4Address":"%s"}]}}]\n' \
        "${label_value}" "${address}"
}

command=${1-}
if [[ $# -gt 0 ]]; then shift; fi

case "${command}" in
    --version)
        echo "container CLI version 1.1.0 (build: release, commit: fake)"
        ;;
    system)
        subcommand=${1-}
        case "${subcommand}" in
            status) [[ -e "${STATE_DIR}/system-running" ]] ;;
            start) touch "${STATE_DIR}/system-running" ;;
            stop) rm -f "${STATE_DIR}/system-running" "${STATE_DIR}/running"/* ;;
            *) exit 1 ;;
        esac
        ;;
    list)
        include_all=false
        for argument in "$@"; do
            [[ "${argument}" == "--all" || "${argument}" == "-a" ]] && include_all=true
        done
        if [[ "${include_all}" == true ]]; then
            list_names "${STATE_DIR}/containers"
        else
            list_names "${STATE_DIR}/running"
        fi
        ;;
    network)
        subcommand=${1-}
        shift || true
        case "${subcommand}" in
            list)
                echo default
                list_names "${STATE_DIR}/networks"
                ;;
            create) touch "${STATE_DIR}/networks/$(last_argument "$@")" ;;
            inspect) inspect_resource network "${1}" ;;
            delete) rm -f "${STATE_DIR}/networks/${1}" ;;
            *) exit 1 ;;
        esac
        ;;
    volume)
        subcommand=${1-}
        shift || true
        case "${subcommand}" in
            list) list_names "${STATE_DIR}/volumes" ;;
            create) touch "${STATE_DIR}/volumes/$(last_argument "$@")" ;;
            inspect) inspect_resource volume "${1}" ;;
            delete) rm -f "${STATE_DIR}/volumes/${1}" ;;
            *) exit 1 ;;
        esac
        ;;
    image)
        subcommand=${1-}
        case "${subcommand}" in
            inspect|pull) exit 0 ;;
            *) exit 1 ;;
        esac
        ;;
    create)
        name=""
        while [[ $# -gt 0 ]]; do
            case "$1" in
                --name)
                    name=$2
                    shift 2
                    ;;
                --label|--network|--platform|--ulimit|--env-file|--volume|--entrypoint|--publish)
                    shift 2
                    ;;
                *)
                    shift
                    ;;
            esac
        done
        [[ -n "${name}" ]]
        touch "${STATE_DIR}/containers/${name}"
        ;;
    inspect)
        inspect_resource container "${1}"
        ;;
    start)
        touch "${STATE_DIR}/running/${1}"
        ;;
    stop)
        for argument in "$@"; do
            case "${argument}" in
                --time|--signal) skip_next=true ;;
                [0-9]*|SIG*) ;;
                *) rm -f "${STATE_DIR}/running/${argument}" ;;
            esac
        done
        ;;
    delete)
        for argument in "$@"; do
            case "${argument}" in
                --force|-f) ;;
                *)
                    rm -f "${STATE_DIR}/running/${argument}"
                    rm -f "${STATE_DIR}/containers/${argument}"
                    ;;
            esac
        done
        ;;
    exec)
        echo 1
        ;;
    logs|copy)
        exit 0
        ;;
    *)
        echo "Unsupported fake container command: ${command} $*" >&2
        exit 1
        ;;
esac