//
//      aegis - project change supervisor
//      Copyright (C) 2002-2008, 2011, 2012, 2014 Peter Miller
//
//      This program is free software; you can redistribute it and/or modify
//      it under the terms of the GNU General Public License as published by
//      the Free Software Foundation; either version 3 of the License, or
//      (at your option) any later version.
//
//      This program is distributed in the hope that it will be useful,
//      but WITHOUT ANY WARRANTY; without even the implied warranty of
//      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//      GNU General Public License for more details.
//
//      You should have received a copy of the GNU General Public License
//      along with this program. If not, see
//      <http://www.gnu.org/licenses/>.
//


#include <libaegis/arglex2.h>
#include <libaegis/change.h>
#include <aecomplete/command/aed.h>
#include <aecomplete/command/generic.h>
#include <aecomplete/command/private.h>
#include <aecomplete/complete/change/file.h>
#include <aecomplete/complete/change/number.h>
#include <aecomplete/complete/project/branch.h>
#include <aecomplete/complete/project/name.h>
#include <libaegis/project.h>
#include <libaegis/user.h>
#include <libaegis/zero.h>


static void
destructor(command_ty *)
{
}


static void
do_nothing(void)
{
}


static complete_ty *
completion_get(command_ty *)
{
    complete_ty    *result;
    string_ty      *project_name;
    long           change_number1;
    const char     *branch;
    project     *pp;
    int            incomplete_change_number1;
    int            incomplete_change_number2;
    int            incomplete_branch;
    user_ty::pointer up;
    change::pointer cp;
    int            baserel;

    arglex2_retable(0);
    arglex();
    project_name = 0;
    change_number1 = 0;
    branch = 0;
    incomplete_change_number1 = 0;
    incomplete_change_number2 = 0;
    incomplete_branch = 0;
    while (arglex_token != arglex_token_eoln)
    {
        switch (arglex_token)
        {
        default:
            result = generic_argument_complete();
            if (result)
                return result;
            continue;

        case arglex_token_change:
            switch (arglex())
            {
            default:
                continue;

            case arglex_token_number:
                if (arglex_value.alv_number == 0)
                    change_number1 = MAGIC_ZERO;
                else if (arglex_value.alv_number > 0)
                    change_number1 = arglex_value.alv_number;
                break;

            case arglex_token_number_incomplete:
            case arglex_token_string_incomplete:
                incomplete_change_number1 = 1;
                break;
            }
            break;

        case arglex_token_number:
            if (arglex_value.alv_number == 0)
                change_number1 = MAGIC_ZERO;
            else if (arglex_value.alv_number > 0)
                change_number1 = arglex_value.alv_number;
            break;

        case arglex_token_number_incomplete:
            incomplete_change_number1 = 1;
            break;

        case arglex_token_anticipate:
            switch (arglex())
            {
            default:
                continue;

            case arglex_token_number:
                // second change number
                break;

            case arglex_token_number_incomplete:
            case arglex_token_string_incomplete:
                incomplete_change_number2 = 1;
                break;
            }
            break;

        case arglex_token_project:
            switch (arglex())
            {
            default:
                continue;

            case arglex_token_string:
                project_name = str_from_c(arglex_value.alv_string);
                break;

            case arglex_token_string_incomplete:
            case arglex_token_number_incomplete:
                return complete_project_name();
            }
            break;

        case arglex_token_branch:
            switch (arglex())
            {
            default:
                continue;

            case arglex_token_number:
            case arglex_token_string:
                branch = arglex_value.alv_string;
                break;


            case arglex_token_stdio:
                branch = "";
                break;

            case arglex_token_number_incomplete:
            case arglex_token_string_incomplete:
                incomplete_branch = 1;
                break;
            }
            break;

        case arglex_token_trunk:
            branch = "";
            break;

        case arglex_token_grandparent:
            branch = "..";
            break;

        case arglex_token_directory:
        case arglex_token_file:
            // noise word, ignore
            break;

        case arglex_token_string:
            // whole file name, ignore
            break;

        case arglex_token_string_incomplete:
            // incomplete file name
            break;

        case arglex_token_base_relative:
        case arglex_token_current_relative:
            user_ty::relative_filename_preference_argument(do_nothing);
            break;
        }
        arglex();
    }

    //
    // Work out which project to use.
    //
    if (!project_name)
    {
        nstring n = user_ty::create()->default_project();
        project_name = str_copy(n.get_ref());
    }
    pp = project_alloc(project_name);
    pp->bind_existing();

    //
    // If we need to complete a branch number, we have the project now.
    //
    if (incomplete_branch)
        return complete_project_branch(pp, 1);

    //
    // If we need to complete a change number, we have the project now.
    //
    if (incomplete_change_number1)
    {
        return
            complete_change_number
            (
                pp,
                (
                    (1 << cstate_state_being_developed)
                |
                    (1 << cstate_state_being_integrated)
                )
            );
    }
    if (incomplete_change_number2)
    {
        if (branch)
            pp = pp->find_branch(branch);
        return
            complete_change_number
            (
                pp,
                ~(
                    (1 << cstate_state_awaiting_development)
                |
                    (1 << cstate_state_completed)
                )
            );
    }

    //
    // locate user data
    //
    up = user_ty::create();

    //
    // locate change data
    //
    if (!change_number1)
        change_number1 = up->default_change(pp);
    cp = change::create(pp, change_number1);
    cp->bind_existing();

    //
    // Figure out whether we are using base relative file names, or
    // current directory relative file names.
    //
    baserel =
        (
            up->relative_filename_preference
            (
                uconf_relative_filename_preference_current
            )
        ==
            uconf_relative_filename_preference_base
        );

    //
    // We are going to complete a file name.
    //
    return complete_change_file(cp, baserel, 0, 0);
}


static command_vtbl_ty vtbl =
{
    destructor,
    completion_get,
    sizeof(command_ty),
    "aed",
};


command_ty *
command_aed()
{
    return command_new(&vtbl);
}


// vim: set ts=8 sw=4 et :