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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2025 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "main.h"

#ifndef _WIN32

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

#include <ui/ui.h>
#include <cx/printf.h>
#include <pthread.h>

#include "main.h"
#include "uiclient.h"

/*
 * debug window that is always created
 */
static UiObject *debug_window;

/*
 * test window, that is only created in testing mode
 */
static UiObject *test_window;

static int test_mode = 0;

static int input_fd[2];
static int output_fd[2];

int main(int argc, char **argv) {
    test_mode = 1;
    
    ui_init(NULL, argc, argv);
    ui_onstartup(application_onstartup, NULL);
    ui_onopen(application_onopen, NULL);
    ui_onexit(application_onexit, NULL);
    
    int in = STDIN_FILENO;
    int out = STDOUT_FILENO;
    if(test_mode) {
        if(pipe(input_fd)) {
            perror("pipe");
            return 1;
        }
        if(pipe(output_fd)) {
            perror("pipe");
            return 1;
        }
        
        in = input_fd[0];
        out = output_fd[1];
        
        pthread_t tid;
        if(pthread_create(&tid, NULL, testwindow_read_thread, NULL)) {
            perror("pthread_create");
            return 1;
        }
        if(pthread_detach(tid)) {
            perror("pthread_detach");
            return 1;
        }
    }
    UiMessageHandler *h = uic_simple_msg_handler(in, out, client_msg_received);
    client_init(h);
    h->start(h);
    
    ui_main();
    
    h->stop(h);
    fprintf(stderr, "client: end");
    
    return 0;
}

void application_onstartup(UiEvent *event, void *userdata) {
    // We need at least one window for the event loop to work.
    // Create a debug window, that is invisible by default
    debug_window = ui_simple_window("debug", NULL);
    // TODO: debug UI
    
    if(test_mode) {
        testwindow_create();
    }
}

void application_onopen(UiEvent *event, void *userdata) {
    
}

void application_onexit(UiEvent *event, void *userdata) {
    
}

static void testwindow_close(UiEvent *event, void *userdata) {
    ui_close(debug_window);
    ui_app_quit();
    exit(0);
}

static void testwindow_send(UiEvent *event, void *userdata) {
    TestWindow *window = event->window;
    
    char *str = ui_get(window->input);
    int len = strlen(str);
    cxmutstr msg = cx_asprintf("%d\n%s", len, str);
    write(input_fd[1], msg.ptr, msg.length);
    free(msg.ptr);
    
    ui_set(window->input, "");
}

static void testwindow_clear_output(UiEvent *event, void *userdata) {
    TestWindow *window = event->window;
    ui_set(window->output, "");
}

void testwindow_create(void) {
    UiObject *obj = ui_simple_window("Test", NULL);
    ui_context_closefunc(obj->ctx, testwindow_close, NULL);
    ui_window_size(obj, 1800, 1400);
    
    TestWindow *window = ui_malloc(obj->ctx, sizeof(TestWindow));
    window->input = ui_text_new(obj->ctx, NULL);
    window->output = ui_text_new(obj->ctx, NULL);
    obj->window = window;
    
    ui_hsplitpane(obj, .fill = TRUE, .initial_position = 900) {
        // left
        ui_vbox(obj, .fill = TRUE) {
            ui_grid(obj, .margin = 10, .columnspacing = 10, .rowspacing = 10, .fill = TRUE) {
                ui_llabel(obj, .label = "Input", .style = UI_LABEL_STYLE_TITLE, .hexpand = TRUE, .hfill = TRUE);
                ui_newline(obj);
                ui_textarea(obj, .value = window->input, .fill = TRUE);
                ui_newline(obj);
                ui_button(obj, .label = "Send", .onclick = testwindow_send);
            }
        }
        
        
        // right
        ui_vbox(obj, .fill = TRUE) {
            ui_grid(obj, .margin = 10, .columnspacing = 10, .rowspacing = 10, .fill = TRUE) {
                ui_llabel(obj, .label = "Output", .style = UI_LABEL_STYLE_TITLE, .hexpand = TRUE, .hfill = TRUE);
                ui_newline(obj);
                ui_textarea(obj, .value = window->output, .fill = TRUE);
                ui_newline(obj);
                ui_button(obj, .label = "Clear", .onclick = testwindow_clear_output);
            }
        }
    }
    
    ui_show(obj);
    
    test_window = obj;
}

static int append_log(void *data) {
    char *msg = data;
    TestWindow *window = test_window->window;
    UiText *out = window->output;
    int length = out->length(out);
    out->insert(out, length, msg);
    free(msg);
    return 0;
}

void* testwindow_read_thread(void *data) {
    char buf[4096];
    ssize_t r;
    while((r = read(output_fd[0], buf, 4096)) > 0) {
        char *str = malloc(r+1);
        memcpy(str, buf, r);
        str[r] = 0;
        ui_call_mainthread(append_log, str);
    }
    
    return NULL;
}

#else


int WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {
    return 0;
}

#endif