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#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "steam.h"
#include "toast.h"

#include "commands.h"
#include "updater.h"

#define ARRAY_LEN(arr) sizeof(arr) / sizeof(arr[0])

static int install(int, char**);
static int update(int, char**);
static int run(int, char**);
static int info(int, char**);

const struct Command commands[] = {
    { .name = "install",   .func = install, .description = "Install OpenFortress"},
    { .name = "update",    .func = update,  .description = "Update an existing install"},
    { .name = "run",       .func = run,     .description = "Run OpenFortress"},
    { .name = "info",      .func = info,    .description = "Show info about the current setup"},
};
const size_t commands_size = ARRAY_LEN(commands);

static int install(int c, char** v)
{
    int exit_val = EXIT_SUCCESS;
    char* of_dir = NULL;
    char* remote = NULL;
    for (int i = 1; i < c; ++i)
    {
        if (!strcmp(v[i], "--dir"))
        {
            if (!v[++i])
            {
                puts("No Directory specified");
                return EXIT_FAILURE;
            }
            of_dir = strdup(v[i]);
            printf("Using %s as the directory\n", of_dir);
        }
        else if (!strcmp(v[i], "--remote"))
        {
            if (!v[++i])
            {
                puts("No URL specified");
                return EXIT_FAILURE;
            }
            remote = strdup(v[i]);
            printf("Using %s as the server\n", remote);
        }
        else
        {
            if (strcmp(v[i], "--help"))
                printf("%s is not a valid flag\n\n", v[i]);

            puts(
                "OFCL install\n"
                "\t--dir\t\tspecify where to download OpenFortress to\n"
                "\t--remote\tspecify the server to use\n"
                "\t--help\t\tshows this text"
            );
            return EXIT_FAILURE;
        }
    }
    if (!of_dir)
        of_dir = getOpenFortressDir();

    if (getLocalRevision(of_dir) >= 0)
    {
        puts("OpenFortress is already installed");
        exit_val = EXIT_FAILURE;
        goto install_cleanup;
    }

    if (!remote)
        remote = getLocalRemote(of_dir);

    int remote_rev = getLatestRemoteRevision(remote);

    if (remote_rev != -1)
    {
        update_setup(of_dir, remote, 0, remote_rev);
    }
    else
    {
        puts("Failed to get the latest revision");
        exit_val = EXIT_FAILURE;
    }

    install_cleanup:
    if (remote)
        free(remote);
    free(of_dir);

    return exit_val;
}

static int update(int c, char** v)
{
    int exit_val = EXIT_SUCCESS;
    int force = 0;
    char* of_dir = NULL;
    char* remote = NULL;
    for (int i = 1; i < c; ++i)
    {
        if (!strcmp(v[i], "--force"))
            force = 1;
        else if (!strcmp(v[i], "--dir"))
        {
            if (!v[++i])
            {
                puts("No Directory specified");
                return EXIT_FAILURE;
            }
            of_dir = strdup(v[i]);
            printf("Using %s as the directory\n", of_dir);
        }
        else if (!strcmp(v[i], "--remote"))
        {
            if (!v[++i])
            {
                puts("No URL specified");
                return EXIT_FAILURE;
            }
            remote = strdup(v[i]);
            printf("Using %s as the server\n", remote);
        }
        else
        {
            if (strcmp(v[i], "--help"))
                printf("%s is not a valid flag\n\n", v[i]);

            puts(
                "OFCL update\n"
                "\t--force\t\tforce update\n"
                "\t--dir\t\tspecify where to download OpenFortress to\n"
                "\t--remote\tspecify the server to use\n"
                "\t--help\t\tshows this text"
            );
            return EXIT_FAILURE;
        }
    }

    if (!of_dir)
        of_dir = getOpenFortressDir();

    int local_rev = getLocalRevision(of_dir);
    if (force)
    {
        local_rev = 0;
    }
    else if (0 > local_rev)
    {
        puts("OpenFortress is not installed");
        exit_val = EXIT_FAILURE;
        goto update_cleanup;
    }

    if (!remote)
        remote = getLocalRemote(of_dir);

    if (!strlen(remote))
    {
        puts("Remote is invalid");
        exit_val = EXIT_FAILURE;
        goto update_cleanup;
    }

    int remote_rev = getLatestRemoteRevision(remote);

    if (remote_rev == -1)
    {
        puts("Failed to get the latest revision");
        exit_val = EXIT_FAILURE;
        goto update_cleanup;
    }
    else if (remote_rev <= local_rev)
    {
        puts("Already up to date");
        goto update_cleanup;
    }

    update_setup(of_dir, remote, local_rev, remote_rev);

    update_cleanup:
    if (remote)
        free(remote);
    free(of_dir);
    return exit_val;
}

static int run(int c, char** v)
{
    int exit_val = EXIT_SUCCESS;
    char* of_dir = getOpenFortressDir();

    int local_rev = getLocalRevision(of_dir);
    if (0 > local_rev)
    {
        puts("OpenFortress is not installed");
        exit_val = EXIT_FAILURE;
        goto run_cleanup;
    }

    if (getSteamPID() == -1)
    {
        puts("Steam is not running");
        exit_val = EXIT_FAILURE;
        goto run_cleanup;
    }

    runOpenFortress(v+1, (size_t)(c-1));

    run_cleanup:
    free(of_dir);
    return exit_val;
}

static int info(int c, char** v)
{
    char* of_dir = getOpenFortressDir();
    if (!of_dir)
        of_dir = strdup("Not Found");
    printf("Install Directory:\n\t%s\n", of_dir);

    char* remote = getLocalRemote(of_dir);
    printf("Server:\n\t%s\n", remote);
    free(remote);

    int local_rev = getLocalRevision(of_dir);
    printf("Revision:\t\n");
    if (local_rev == -1)
        puts("\tNot installed");
    else
        printf("\t%i\n", local_rev);

    free(of_dir);

    return EXIT_SUCCESS;
}