/******************************************************************************
               __               ____                __
              / /   ___  ____ _/ __/_____________ _/ /__
             / /   / _ \/ __ `/ /_/ ___/ ___/ __ `/ / _ \
            / /___/  __/ /_/ / __(__  ) /__/ /_/ / /  __/
           /_____/\___/\__,_/_/ /____/\___/\__,_/_/\___/

   (C)opyright 2025, Leafscale, LLC -  https://www.leafscale.com

   Project: Zygaena
  Filename: sync.reef
   Authors: Chris Tusa <chris.tusa@leafscale.com>
   License: <see LICENSE file included with this source code>
Description: Sync command - update ports collection from repository

******************************************************************************/

module commands.sync

import sys.args
import sys.process
import io.dir
import io.path
import io.file
import core.str
import core.config
import core.port
import core.portindex
import util.color
import exitcodes as ec

export
    fn execute(): int
end export

fn execute(): int
    // Load configuration
    let cfg = config.load()
    let ports_dir = config.get_ports_dir(cfg)

    color.print_action("Syncing ports collection...")
    println("")

    // Check if ports directory exists
    if not dir.dir_exists(ports_dir)
        color.print_error("Ports directory does not exist: " + ports_dir)
        color.print_info("You may need to clone the ports repository first:")
        println("  git clone <ports-repo-url> " + ports_dir)
        return ec.EXIT_CONFIG_ERROR()
    end if

    // Check if it's a git repository
    let git_dir = path.join_path(ports_dir, ".git")
    if not dir.dir_exists(git_dir)
        color.print_warning("Ports directory is not a git repository")
        color.print_info("Cannot sync - no version control detected")
        return ec.EXIT_CONFIG_ERROR()
    end if

    // Run git pull
    color.print_info("Updating from remote repository...")

    let cmd = "cd \"" + ports_dir + "\" && git pull"
    let pid = process.process_spawn_shell(cmd)

    if pid < 0
        color.print_error("Failed to start git pull")
        return ec.EXIT_REPO_UNREACHABLE()
    end if

    let exit_code = process.process_wait(pid)

    if exit_code == 0
        color.print_success("Ports collection updated successfully")

        // Rebuild ports index after successful sync
        portindex.rebuild_port_index()

        // Show summary of changes
        show_update_summary(ports_dir)
        return ec.EXIT_SUCCESS()
    else
        color.print_error("Git pull failed with exit code " + int_to_str(exit_code))
        color.print_info("Check your network connection and repository access")
        return ec.EXIT_REPO_UNREACHABLE()
    end if
end execute

proc show_update_summary(ports_dir: string)
    // Count ports in each category (dynamically discovered)
    mut cats: [string] = new [string](32)
    let cat_count = port.get_categories(cats, 32)

    mut total = 0
    mut i = 0
    while i < cat_count
        let cat = cats[i]
        let cat_path = path.join_path(ports_dir, cat)

        if dir.dir_exists(cat_path)
            mut entries: [string] = new [string](256)
            let count = dir.list_dir(cat_path, entries, 256)

            // Count valid ports (directories with package.toml)
            mut port_count = 0
            mut j = 0
            while j < count
                let entry = entries[j]
                if str.length(entry) > 0 and entry[0] != '.'
                    let toml_path = path.join_path(path.join_path(cat_path, entry), "package.toml")
                    if file.fileExists(toml_path)
                        port_count = port_count + 1
                    end if
                end if
                j = j + 1
            end while

            if port_count > 0
                println("  " + cat + ": " + int_to_str(port_count) + " ports")
                total = total + port_count
            end if
        end if

        i = i + 1
    end while

    println("")
    color.print_info("Total: " + int_to_str(total) + " ports available")
end show_update_summary

// Helper: convert int to string
fn int_to_str(n: int): string
    if n == 0
        return "0"
    end if

    mut negative = false
    mut value = n
    if n < 0
        negative = true
        value = 0 - n
    end if

    mut result = ""
    while value > 0
        let digit = value % 10
        result = str.concat(str.substring("0123456789", digit, 1), result)
        value = value / 10
    end while

    if negative
        result = str.concat("-", result)
    end if

    return result
end int_to_str

end module