#!/bin/bash

kopiaBackupAppToLocation()
{
    local idx="$1"
    local app_name="$2"
    local manifest_sha="$3"
    local source_path="$containers_dir$app_name"

    if [[ ! -d "$source_path" ]]; then
        isError "Source path missing for $app_name: $source_path"
        return 1
    fi

    kopiaEnvExport "$idx" || return 1

    local host_tag="${CFG_INSTALL_NAME:-libreportal}"
    local tags=("--tags" "app:$app_name" "--tags" "host:$host_tag" "--tags" "engine:libreportal")
    [[ -n "$manifest_sha" ]] && tags+=("--tags" "manifest:$manifest_sha")

    local loc_name
    loc_name=$(resticLocationName "$idx")
    isNotice "Snapshotting $app_name → $loc_name (kopia)"

    # Kopia has no per-run --exclude; it reads .kopiaignore from the source
    # tree. On the live path write the raw DB data dirs (made relative to the
    # source) as ignore patterns, snapshot, then remove it so the rule never
    # leaks into a later non-live backup of the same app.
    local ignore_file="$source_path/.kopiaignore"
    local wrote_ignore=false
    if [[ -n "${backup_exclude_paths:-}" ]]; then
        local rel
        : | sudo tee "$ignore_file" >/dev/null
        while IFS= read -r p; do
            [[ -z "$p" ]] && continue
            rel="/${p#"$source_path"/}"
            echo "$rel" | sudo tee -a "$ignore_file" >/dev/null
        done <<< "$backup_exclude_paths"
        sudo chown "$docker_install_user":"$docker_install_user" "$ignore_file" 2>/dev/null
        wrote_ignore=true
    fi

    local output
    output=$(sudo -E -u "$docker_install_user" kopia snapshot create "$source_path" "${tags[@]}" --json 2>&1)
    local rc=$?

    [[ "$wrote_ignore" == true ]] && sudo rm -f "$ignore_file"

    local snapshot_id
    snapshot_id=$(echo "$output" | grep -oE '"id":\s*"[^"]+"' | head -1 | cut -d'"' -f4)

    if [[ $rc -eq 0 ]]; then
        isSuccessful "Backup created in $loc_name: ${snapshot_id:0:12}"
        echo "$snapshot_id"
    else
        isError "Kopia backup to $loc_name failed for $app_name"
        echo "$output" | tail -10
    fi

    kopiaEnvUnset
    return $rc
}