#!/bin/bash

# --- BEGIN VARIABLES: SET THESE ---
ROCKET_CHAT_URL="https://chat.koozali.org"
TOKEN="LwSxku5012GVjT5GKukvCiAE3jmxzNREsJ3ZO87oP1D"
USER_ID="9RmjfwmQZc9pYrC9G"
CHANNELS_FILE="ChannelsToAddTo"
# --- END VARIABLES ---

# Get all users (members) from Rocket.Chat
get_all_members() {
    curl -s -X GET "$ROCKET_CHAT_URL/api/v1/users.list?count=1000" \
        -H "X-Auth-Token: $TOKEN" \
        -H "X-User-Id: $USER_ID" \
        -H "Content-Type: application/json"
}

# Get all members of a channel
get_channel_members() {
    local channel_id="$1"
    curl -s -X GET "$ROCKET_CHAT_URL/api/v1/channels.members?roomId=$channel_id" \
        -H "X-Auth-Token: $TOKEN" \
        -H "X-User-Id: $USER_ID" \
        -H "Content-Type: application/json"
}

# Add a single user to a channel
add_member_to_channel() {
    local channel_id="$1"
    local member_id="$2"
    curl -s -X POST "$ROCKET_CHAT_URL/api/v1/channels.invite" \
        -H "X-Auth-Token: $TOKEN" \
        -H "X-User-Id: $USER_ID" \
        -H "Content-Type: application/json" \
        -d "{\"roomId\":\"$channel_id\", \"userId\":\"$member_id\"}"
}

# MAIN SCRIPT
echo "Fetching ALL Rocket.Chat users..."
members_response=$(get_all_members)
member_ids=$(echo "$members_response" | jq -r '.users[] | select(.active == true) | ._id')
total_members=$(echo "$member_ids" | wc -w)
echo "Total members to add: $total_members"

while read -r channel_name channel_id; do
    echo ""
    echo "Processing channel '$channel_name' ($channel_id)..."
    # Get current members of this channel (as a bash array)
    current_members=$(get_channel_members "$channel_id" | jq -r '.members[] | ._id')
    # Add each member _only if not already in the channel_
    added=0
    already=0
    for member_id in $member_ids; do
        if echo "$current_members" | grep -qx "$member_id"; then
            echo "  User $member_id is ALREADY a member of $channel_name"
            ((already++))
        else
            resp=$(add_member_to_channel "$channel_id" "$member_id")
            if echo "$resp" | grep -q '"success":true'; then
                echo "  Added user $member_id to $channel_name"
                ((added++))
            else
                echo "  Could NOT add $member_id to $channel_name: $(echo "$resp" | jq -c .)"
            fi
        fi
    done
    echo "$added members added, $already already present in $channel_name"
done < "$CHANNELS_FILE"