#!/usr/bin/env bash
# Begin profile
# ------------------------------------------------------------------------------
# Copyright (c) 2013-2022 Geoffray Levasseur <fatalerrors@geoffray-levasseur.org>
# Protected by the BSD3 license. Please read bellow for details.
#
# * Redistribution and use in source and binary forms,
# * with or without modification, are permitted provided
# * that the following conditions are met:
# *
# *   Redistributions of source code must retain the above
# *   copyright notice, this list of conditions and the
# *   following disclaimer.
# *
# *   Redistributions in binary form must reproduce the above
# *   copyright notice, this list of conditions and the following
# *   disclaimer in the documentation and/or other materials
# *   provided with the distribution.
# *
# *   Neither the name of the copyright holder nor the names
# *   of any other contributors may be used to endorse or
# *   promote products derived from this software without
# *   specific prior written permission.
# *
# * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
# * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
# * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# * OF SUCH DAMAGE.
# ------------------------------------------------------------------------------

if [[ ! $SHELL =~ bash|zsh ]]; then
    echo "That environment script is designed to be used with bash or zsh being the shell."
    echo "Please consider using bash or zsh instead, or patch me ;)!"
    return 1
fi

# ------------------------------------------------------------------------------
# path* : private functions for PATH variable management
pathremove()
{
    local IFS=':'
    local newpath
    local dir
    local pathvar=${2:-PATH}
    for dir in ${!pathvar}; do
        if [ "$dir" != "$1" ]; then
            newpath=${newpath:+$newpath:}$dir
        fi
    done
    export $pathvar="$newpath"
}

pathprepend()
{
    pathremove $1 $2
    local pathvar=${2:-PATH}
    export $pathvar="$1${!pathvar:+:${!pathvar}}"
}

pathappend()
{
    pathremove $1 $2
    local pathvar=${2:-PATH}
    export $pathvar="${!pathvar:+${!pathvar}:}$1"
}
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# Configuration file parser
parse_conf()
{
    local config_file="$1"
    local current_section=""

    [[ ! -f "$config_file" ]] && return 1

    while IFS='=' read -r key value || [[ -n "$key" ]]; do
        # Clean key and value (strip CR and whitespace)
        key=$(printf '%s' "$key" | tr -d '\r' | xargs 2>/dev/null)
        value=$(printf '%s' "$value" | tr -d '\r' | xargs 2>/dev/null)

        # Skip comments and empty lines
        [[ -z "$key" || "$key" =~ ^[#\;] ]] && continue

        # Section Detection: [section_name]
        if [[ "$key" =~ ^\[(.*)\]$ ]]; then
            current_section="${BASH_REMATCH[1]}"
            # Dynamically declare the associative array for this section
            declare -g -A "CONF_$current_section"
            continue
        fi

        # If we have a key/value pair and are inside a section
        if [[ -n "$current_section" && -n "$value" ]]; then
            # Strip quotes from value
            value="${value%\"}"; value="${value#\"}"
            value="${value%\'}"; value="${value#\'}"

            # Store in the dynamic array: CONF_sectionname[key]=value
            eval "CONF_${current_section}['$key']='$value'"
        fi
    done < "$config_file"
}
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# Load command aliases from configuration
load_alias()
{
    local section_name="CONF_$1"

    # Check if the associative array for this section exists
    if [[ "$(declare -p "$section_name" 2>/dev/null)" != "declare -A"* ]]; then
        return 1
    fi

    # Reference the array keys
    eval "local keys=\"\${!$section_name[@]}\""

    for key in $keys; do
        # Fetch the value for this specific key
        eval "local cmd=\"\${$section_name[$key]}\""

        # Portability check: only alias if the command exists
        local base_cmd=$(echo "$cmd" | awk '{print $1}')
        if command -v "$base_cmd" >/dev/null 2>&1; then
            alias "$key"="$cmd"
        fi
    done
}
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# Load configuration values as environment variables
load_conf()
{
    local section_name="CONF_$1"

    if [[ "$(declare -p "$section_name" 2>/dev/null)" != "declare -A"* ]]; then
        return 1
    fi

    eval "local keys=\"\${!$section_name[@]}\""

    for key in $keys; do
        eval "local val=\"\${$section_name[$key]}\""
        # Export as a standard shell variable
        export "$key"="$val"
    done
}
# ------------------------------------------------------------------------------


# ------------------------------------------------------------------------------
# ------------------------------------------------------------------------------
# ********************************** MAIN PROGRAM ******************************
# ------------------------------------------------------------------------------
# ------------------------------------------------------------------------------

# Store script's path (realpath -s resolve symlinks if profile.sh is a symlink)
if [[ -z "$PROFILE_PATH" ]]; then
    export MYPATH=$(dirname "$(realpath -s "$0")")
else
    export MYPATH="$PROFILE_PATH"
fi
if [[ ! -e "$MYPATH/profile.sh" ]]; then
    echo "[ Warning ] Path detection failed, trying to use pwd..."
    MYPATH=$(pwd)
    if [[ ! -e "$MYPATH/profile.sh" ]]; then
        echo "[ Error ] Impossible to determine installation path, pretty much nothing will work."
    fi
fi

if [[ ! -s "$MYPATH/version" ]]; then
    echo "[ Warning ] Impossible to determine running version of profile, your installation might be broken."
fi
export PROFVERSION=$(cat "$MYPATH"/version)

# Build PATH environment variable
if [[ $EUID -eq 0 ]]; then
    pathappend /sbin:/usr/sbin
fi
[[ -d ~/bin ]] && pathappend ~/bin
[[ -d ~/.local/bin ]] && pathappend ~/.local/bin

# Parse and load general configuration
export PROFILE_CONF="$MYPATH/profile.conf"
parse_conf "$PROFILE_CONF"
load_conf system  # Load Bash system behavior configuration (history, pager, etc.)
load_conf general # General purpose configuration (compilation flags, etc.)

# Load module scripts
for script in $MYPATH/profile.d/*.sh; do
    if [[ -r $script ]]; then
        . $script
    fi
done

# Interactive shell detection, two methods available each one of those might have different result
# depending on distribution
#shopt -q login_shell && INTERACTIVE=1
[[ $- == *i* ]] && export INTERACTIVE=1

if [[ $INTERACTIVE ]]; then
    # For compiling (as we often compile with LFS/0linux...)
    #Aliases
    load_alias aliases 

    # Define PS1
    trap 'timer_start' DEBUG
    PROMPT_COMMAND='set_prompt'

    # Set default language
    setfr
    showinfo && printf "\n"
    check_updates -q
    disp I "Profile version $PROFVERSION chargé..."
fi

# Cleanup
unset pathremove pathprepend pathappend

#return 0

# End profile.sh