# -*- tcl -*-
# Maintenance Instruction: leave the 999999.xxx.x as is and use 'pmix make' or src/make.tcl to update from <pkg>-buildversion.txt
#
# Please consider using a BSD or MIT style license for greatest compatibility with the Tcl ecosystem.
# Code using preferred Tcl licenses can be eligible for inclusion in Tcllib, Tklib and the punk package repository.
# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++
# (C) 2023
#
# @@ Meta Begin
# Application punkboot::utils 0.1.0
# Meta platform     tcl
# Meta license      BSD
# @@ Meta End



# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++
##  Requirements
##e.g package require frobz
package require Tcl 8.6-


# ++ +++ +++ +++ +++ +++ +++ +++ +++ +++ +++
namespace eval punkboot::utils {
    variable version 0.1.0
    namespace export parse_punkproject_version read_punkproject_version read_changelog_latest_version


    namespace eval argdoc {
        lappend PUNKARGS [list {
            @id     -id     ::punkboot::utils::parse_punkproject_version
            @cmd    -name   "::punkboot::utils::parse_punkproject_version"\
                -summary\
                    "Parse the [project] version from TOML content string"\
                -help\
                    "Scans TOML content for the [project] section and returns
                    the value of the version key as a string. Returns an empty
                    string if the section or key is not found."
            @leaders
                content     -type string -optional 0 -help\
                    "TOML content string to parse"
        }]
    }
    proc parse_punkproject_version {content} {
        set in_project 0
        foreach line [split $content \n] {
            set trimmed [string trim $line]
            if {[string index $trimmed 0] eq {[} && [string index $trimmed end] eq {]}} {
                set in_project [expr {$trimmed eq "\[project\]"}]
                continue
            }
            if {$in_project && [regexp {^version\s*=\s*"([^"]+)"} $trimmed _ v]} {
                return $v
            }
        }
        return ""
    }


    namespace eval argdoc {
        lappend PUNKARGS [list {
            @id     -id     ::punkboot::utils::read_punkproject_version
            @cmd    -name   "::punkboot::utils::read_punkproject_version"\
                -summary\
                    "Read the [project] version from a TOML file"\
                -help\
                    "Reads the file at tomlfile and returns the [project]
                    version value as a string. Returns an empty string if the
                    file does not exist or the version is not found."
            @leaders
                tomlfile    -type string -optional 0 -help\
                    "Path to the TOML file to read"
        }]
    }
    proc read_punkproject_version {tomlfile} {
        if {![file exists $tomlfile]} {return ""}
        set fh [open $tomlfile r]
        try {
            set content [read $fh]
        } finally {
            close $fh
        }
        return [::punkboot::utils::parse_punkproject_version $content]
    }


    namespace eval argdoc {
        lappend PUNKARGS [list {
            @id     -id     ::punkboot::utils::read_changelog_latest_version
            @cmd    -name   "::punkboot::utils::read_changelog_latest_version"\
                -summary\
                    "Read the latest ## [X.Y.Z] version header from a changelog file"\
                -help\
                    "Scans the changelog file from the top and returns the
                    version string from the first '## [X.Y.Z]' header line.
                    Returns an empty string if the file does not exist or no
                    matching header is found."
            @leaders
                changelogfile    -type string -optional 0 -help\
                    "Path to the changelog file to read"
        }]
    }
    proc read_changelog_latest_version {changelogfile} {
        if {![file exists $changelogfile]} {return ""}
        set fh [open $changelogfile r]
        try {
            set content [read $fh]
        } finally {
            close $fh
        }
        foreach line [split $content \n] {
            if {[regexp {^##\s*\[([0-9][^\]]*)\]} $line _ v]} {
                return $v
            }
        }
        return ""
    }
}

namespace eval ::punk::args::register {
    #use fully qualified so 8.6 doesn't find existing var in global namespace
    lappend ::punk::args::register::NAMESPACES ::punkboot::utils ::punkboot::utils::argdoc
}

##  Ready
package provide punkboot::utils [tcl::namespace::eval punkboot::utils {
    variable version
    #- this version number, exactly 0.1.0, is a literal used in src module folders
    #- we refer to this sometimes as the magic version number
    set version 0.1.0
}]
return