// This file is part of Freecell Solver. It is subject to the license terms in
// the COPYING.txt file found in the top-level directory of this distribution
// and at http://fc-solve.shlomifish.org/docs/distro/COPYING.html . No part of
// Freecell Solver, including this file, may be copied, modified, propagated,
// or distributed except according to the terms contained in the COPYING file.
//
// Copyright (c) 2016 Shlomi Fish
#pragma once

#include "main_cl_callback_common.h"

static inline FILE *fc_solve_calc_file_handle(const char *const fn)
{
    FILE *const f = fopen(fn, "r");
    if (!f)
    {
        fprintf(stderr, "Could not open file \"%s\" for input. Exiting.\n", fn);
    }
    return f;
}

int main(const int argc, char **const argv)
{
    display_context = INITIAL_DISPLAY_CONTEXT;
    int arg = 1;
    instance = alloc_instance_and_parse(argc, argv, &arg, known_parameters,
        fc_solve__cmd_line_callback, &display_context, false);

    FILE *output_fh;

    if (display_context.output_filename)
    {
        if (!(output_fh = fopen(display_context.output_filename, "wt")))
        {
            fprintf(stderr, "Could not open output file '%s' for writing!",
                display_context.output_filename);
            return -1;
        }
    }
    else
    {
        output_fh = stdout;
    }
// Win32 Does not have those signals
#ifndef WIN32
    signal(SIGUSR1, command_signal_handler);
    signal(SIGUSR2, select_signal_handler);
    signal(SIGABRT, abort_signal_handler);
#endif
    exit_code_type exit_code = SUCCESS;
    while (arg < argc && exit_code == SUCCESS)
    {
        const_AUTO(fn, argv[arg++]);
        FILE *const f = fc_solve_calc_file_handle(fn);
        if (!f)
        {
            freecell_solver_user_free(instance);
            return -1;
        }

        const fcs_user_state_str user_state = read_state(f);
        const int ret = solve_board(instance, user_state.s);
        fprintf(output_fh, "File: %s\n", fn);
        fflush(output_fh);
        switch (ret)
        {
        case FCS_STATE_INVALID_STATE: {
#ifdef FCS_WITH_ERROR_STRS
            char error_string[120];

            freecell_solver_user_get_invalid_state_error_into_string(instance,
                error_string FC_SOLVE__PASS_T(display_context.display_10_as_t));
            fprintf(stderr, "%s\n", error_string);
#else
            fprintf(stderr, "%s\n", "Invalid state");
#endif
            exit_code = ERROR;
        }
        break;

        case FCS_STATE_FLARES_PLAN_ERROR:
            print_flares_plan_error(instance);
            exit_code = ERROR;
            break;

        default: {
            fc_solve_output_result_to_file(
                output_fh, instance, ret, &display_context);
        }
        break;
        }

        freecell_solver_user_recycle(instance);
    }
    if (display_context.output_filename)
    {
        fclose(output_fh);
    }

    freecell_solver_user_free(instance);

    return exit_code;
}
