#!/usr/bin/env bash

FILTER="$1"

if [[ -z "$FILTER" ]]; then
    echo "Usage: $(basename "$0") <bundle-id-prefix|process-name>"
    echo ""
    echo "  Examples:"
    echo "    $(basename "$0") com.mycompany.myapp"
    echo "    $(basename "$0") MyApp"
    exit 1
fi

RED=$'\033[0;31m'
YELLOW=$'\033[0;33m'
CYAN=$'\033[0;36m'
GREEN=$'\033[0;32m'
DIM=$'\033[2m'
RESET=$'\033[0m'

SEP="${DIM}────────────────────────────────────────${RESET}"

cleanup() {
    printf "\n%s[applog] Stopped.%s\n" "$DIM" "$RESET"
    exit 0
}

trap cleanup SIGINT SIGTERM

printf "%s[applog] Filtering for '%s'. Ctrl+C to stop.%s\n\n" "$DIM" "$FILTER" "$RESET"

# System daemons that reference app bundle IDs as incidental observers, not direct participants
BLOCKLIST_RE='^(runningboardd|lsd|trustd|aggregated|tccd|dasd|symptomsd|swcd|calaccessd|mobileassetd|fairplayd|statusbarserver|contextstore|assertiond|thermalmonitord|watchdogd|powerd|logd|notifyd|configd|launchd|mDNSResponder)$'

idevicesyslog 2>/dev/null | while IFS= read -r line; do
    [[ "$line" != *"$FILTER"* ]] && continue

    # Extract process name (stop at '(' or '[' — handles both "proc[sub][pid]" and "proc(sub)[pid]")
    # idevicesyslog format: "Mon DD HH:MM:SS.ssssss processname(subsystem)[pid] <Level>: msg"
    if [[ "$line" =~ ^[A-Za-z]{3}[[:space:]]+[0-9]+[[:space:]]+[0-9:.]+[[:space:]]+([^[:space:]\[\(]+) ]]; then
        [[ "${BASH_REMATCH[1]}" =~ $BLOCKLIST_RE ]] && continue
    fi

    # Colorize by <Level>: field; show all lines regardless of level
    if [[ "$line" =~ \<(Error|ERROR|Fault|FAULT)\>: ]]; then
        printf "%s%s%s\n%s\n" "$RED" "$line" "$RESET" "$SEP"
    elif [[ "$line" =~ \<(Warning|WARNING)\>: ]]; then
        printf "%s%s%s\n%s\n" "$YELLOW" "$line" "$RESET" "$SEP"
    elif [[ "$line" =~ \<(Notice)\>: ]]; then
        printf "%s%s%s\n%s\n" "$CYAN" "$line" "$RESET" "$SEP"
    elif [[ "$line" =~ \<(Info)\>: ]]; then
        printf "%s%s%s\n%s\n" "$GREEN" "$line" "$RESET" "$SEP"
    elif [[ "$line" =~ \<(Debug)\>: ]]; then
        printf "%s%s%s\n%s\n" "$DIM" "$line" "$RESET" "$SEP"
    else
        printf "%s\n%s\n" "$line" "$SEP"
    fi
done