// This file builds most of the html pages

#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "unique_id.h"
#include "errors.h"
#include "time_slot.h"
#include "reservations.h"
#include "aircraft.h"
#include "fleet.h"
#include "cgi_data.h"
#include "main.h"
#include "html.h"




// This function displays the default top level html page for the program.
// From here, the user can select options that will allow him to modify
// info for the aircraft or for individual reservations for the use of those
// aircraft.

void create_main_page(fleet & the_fleet)
  {
  int count = 0;
  new_aircraft *ac_array = NULL;
  int action;
  int selection;
  int i;
  int finished = 0;
  char buffer[32];
  int  buffer_i;
  int ac_id = 0;

  print_html_header("Foggy Bottom Flying Club home page");
  strcat(big_buffer, "\n<h3>existing rental aircraft:</h3>:\n");

  ac_array = the_fleet.find_all_ac(count);
  if (count == 0)
    { strcat(big_buffer, "\nno aircraft currently in club\n\n"); }
  else
    {
    strcat(big_buffer, "<table BORDER>\n");
    for (i = 0; i < count; ++i)
      {
      strcat(big_buffer, "\n<tr>\n");

      // the name goes in one table data

      strcat(big_buffer, "<td><h3>");
      strcat(big_buffer, ac_array[i].name);
      strcat(big_buffer, "</h3></td>\n");

      // The description goes in the other table data. We need to try to
      // preserve any formatting that the user originally input.

      strcat(big_buffer, "<td>");
      strcat(big_buffer, "<pre>");
      strcat(big_buffer, ac_array[i].description);
      strcat(big_buffer, "</pre>");
      strcat(big_buffer, "</td>\n");
      strcat(big_buffer, "</tr>\n");
      }
    strcat(big_buffer, "</table>\n");

    // here comes the 'form' stuff

    strcat(big_buffer, "\n<form action=\"");
    strcat(big_buffer, cgi_script_name);
    strcat(big_buffer, "\" METHOD=\"POST\">\n\n");

    strcat(big_buffer, "<input type=hidden name=request value=send_update>\n\n");

    // make a popup list of aircraft names

    strcat(big_buffer, "existing aircraft\n");
    strcat(big_buffer, "<select name=\"ac\" size=1>\n");
    for (i = 0; i < count; ++i)
      {
      if (i == 0)
        { strcat(big_buffer, "<option selected>"); }
      else
        { strcat(big_buffer, "<option>"); }
      strcat(big_buffer, ac_array[i].name);
      strcat(big_buffer, "\n");
      }
    strcat(big_buffer, "</select>\n\n");
    }

  // make a popup list of actions

  strcat(big_buffer, "action\n");
  strcat(big_buffer, "<select name=\"action\" size=1>\n");
  strcat(big_buffer, "<option selected> add new aircraft\n");
  if (count > 0)
    { 
    strcat(big_buffer, "<option> modify existing aircraft\n");
    strcat(big_buffer, "<option> delete existing aircraft\n");
    strcat(big_buffer, "<option> reserve existing aircraft\n"); 
    }
  strcat(big_buffer, "</select>\n\n");

  // finish off the page with a 'GO' button

  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"GO\">\n\n");

  strcat(big_buffer, "</body>\n");
  strcat(big_buffer, "</html>\n");

  // free memory

  for (i = 0; i < count; ++i)
    { delete [] ac_array[i].description; }
  delete [] ac_array;
  }




// This function sends out a form that will allow the user to add a new 
// aircraft to the list of available aircraft.

void create_add_ac_page()
  {
  char buffer[32];

  print_html_header("Foggy Bottom Flying Club add aircraft");

  print_warning_msg();
  
  strcat(big_buffer, "\n<h2>new aircraft information:</h2>\n\n");

  // here comes the 'form' stuff

  strcat(big_buffer, "\n<form action=\"");
  strcat(big_buffer, cgi_script_name);
  strcat(big_buffer, "\" METHOD=\"POST\">\n\n");

  strcat(big_buffer, "<input type=hidden name=request value=ac_add>\n\n");

  // use a table to line up the fields for the aircraft name and description

  strcat(big_buffer, "<table BORDER>\n\n");

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td>new aircraftc name:</td>\n");
  strcat(big_buffer, "<td><input type=\"text\" name=\"ac_name\" size=");
  sprintf(buffer, "%d", AC_NAME_LEN);
  strcat(big_buffer, buffer);
  strcat(big_buffer, " maxlength=");
  strcat(big_buffer, buffer);
  strcat(big_buffer, "></td>\n");
  strcat(big_buffer, "</tr>\n\n");

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td>new ac description:</td>\n");
  strcat(big_buffer, "<td><textarea name=\"ac_desc\" rows=10 cols=40>\n");
  strcat(big_buffer, "</textarea></td>\n");
  strcat(big_buffer, "</tr>\n");
  strcat(big_buffer, "</table>\n");

  // finish off the page with a few buttons

  strcat(big_buffer, "<br>\n");
  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"cancel\">\n");
  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"GO\">\n\n");

  strcat(big_buffer, "</body>\n");
  strcat(big_buffer, "</html>\n");
  }




// This function creates html that will allow the user to update
// an existing aircraft.

void create_modify_ac_page(new_aircraft aircraft_data)
  {
  char buffer[32];

  print_html_header("Foggy Bottom Flying Club update aircraft");
  
  print_warning_msg();

  strcat(big_buffer, "\n<h2>update existing aircraft:</h2>:\n\n");

  // here comes the 'form' stuff

  strcat(big_buffer, "\n<form action=\"");
  strcat(big_buffer, cgi_script_name);
  strcat(big_buffer, "\" METHOD=\"POST\">\n\n");

  strcat(big_buffer, "<input type=hidden name=request value=ac_update>\n\n");

  strcat(big_buffer, "<input type=hidden name=ac_id value=");
  sprintf(buffer, "%d", aircraft_data.ac_unique_id);
  strcat(big_buffer, buffer);
  strcat(big_buffer, ">\n\n");

  // use a table to line up the fields for the aircraft name and description

  strcat(big_buffer, "<table BORDER>\n\n");

  strcat(big_buffer, "<tr>\n");

  strcat(big_buffer, "<td><input type=\"text\" name=\"ac_name\" size=");
  sprintf(buffer, "%d", AC_NAME_LEN);
  strcat(big_buffer, buffer);
  strcat(big_buffer, " maxlength=");
  strcat(big_buffer, buffer);
  strcat(big_buffer, " value=\"");
  strcat(big_buffer, aircraft_data.name);
  strcat(big_buffer, "\"></td>\n");

  strcat(big_buffer, "<td>aircraft<BR>name:</td>\n");

  strcat(big_buffer, "<td>");
  strcat(big_buffer, aircraft_data.name);
  strcat(big_buffer, "</td>\n");
  strcat(big_buffer, "</tr>\n\n");

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td><textarea name=\"ac_desc\" rows=10 cols=40>\n");
  strcat(big_buffer, "</textarea></td>\n");

  strcat(big_buffer, "<td>aircraft<BR>description</td>\n");

  strcat(big_buffer, "<td>");
  strcat(big_buffer, aircraft_data.description);
  strcat(big_buffer, "</td>\n");
  strcat(big_buffer, "</tr>\n\n");

  strcat(big_buffer, "</tr>\n");
  strcat(big_buffer, "</table>\n");

  // finish off the page with a few buttons

  strcat(big_buffer, "<br>\n");
  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"cancel\">\n");
  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"GO\">\n\n");

  strcat(big_buffer, "</body>\n");
  strcat(big_buffer, "</html>\n");
  }




void print_html_header(const char* title)
  {
  strcpy(big_buffer, "Content-type: text/html\n\n");

  strcat(big_buffer, "<html>\n");
  strcat(big_buffer, "<head>\n");
  strcat(big_buffer, "<title>");
  strcat(big_buffer, title);
  strcat(big_buffer, "</title>\n");
  strcat(big_buffer, "</head>\n");
  strcat(big_buffer, "<body>\n");
  strcat(big_buffer, "<h1>Foggy Bottom Flying Club</h1>\n\n");
  }




// This function creates the html that will allow the user to view, add,
// or delete reservations for the aircraft "ac_id".

void create_add_res_page(fleet & the_fleet, const int ac_id)
  {
  all_ac_data all_data;
  int outcome;
  int i;
  int finished = 0;
  int found = 0;
  char buffer[64];
  int  buffer_i;
  char name[MAX_NAME_LEN];
  time_t new_time;
  time_slot_info new_res;

  all_data = the_fleet.find_all_ac_data(ac_id, outcome);
  if (outcome != SUCCESSFUL)
    {
    strcpy(fatal_err_function, "show_add_update_delete_page");
    sprintf(fatal_err_msg, "call to find_all_ac_data returned error code %d", 
            outcome);
    fatal_error();
    }

  print_html_header("Foggy Bottom Flying Club reservations page");

  print_warning_msg();

  // table header for current reservations

  strcat(big_buffer, "<h3>Current reservations for the club's ");
  strcat(big_buffer, all_data.spec.name);
  strcat(big_buffer, ":</h3>\n\n");
  strcat(big_buffer, "<table BORDER>\n\n");

  // column headers for current reservations

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td>name</td>\n");
  strcat(big_buffer, "<td>start date &amp; time</td>\n");
  strcat(big_buffer, "<td>finish date &amp; time</td>\n");
  strcat(big_buffer, "</tr>\n\n");

  for(i = 0; i < all_data.res_count; ++i)
    {

    // name

    strcat(big_buffer, "<tr>\n");
    strcat(big_buffer, "<td>");
    strcat(big_buffer, all_data.all_res[i].name);

    // start date/time

    strcat(big_buffer, "</td>\n");
    convert_time_t_to_ascii(buffer, all_data.all_res[i].start);
    strcat(big_buffer, "<td>");
    strcat(big_buffer, buffer);
    strcat(big_buffer, "</td>\n");

    // finish date/time

    convert_time_t_to_ascii(buffer, all_data.all_res[i].finish);
    strcat(big_buffer, "<td>");
    strcat(big_buffer, buffer);
    strcat(big_buffer, "</td>\n");
    strcat(big_buffer, "</tr>\n");
    }
  strcat(big_buffer, "</table>\n\n");

  // header and name for new reservation

  strcat(big_buffer, "<h3>Add a new reservation for the club's ");
  strcat(big_buffer, all_data.spec.name);
  strcat(big_buffer, ":</h3>\n");

  // form details and a few hidden fields

  strcat(big_buffer, "\n<form action=\"");
  strcat(big_buffer, cgi_script_name);
  strcat(big_buffer, "\" METHOD=\"POST\">\n\n");
  strcat(big_buffer, "<input type=hidden name=request value=res_update>\n\n");
  strcat(big_buffer, "<input type=hidden name=ac_id value=");
  sprintf(buffer, "%d", all_data.spec.ac_unique_id);
  strcat(big_buffer, buffer);
  strcat(big_buffer, ">\n\n");

  // create a text entry gizmo to input the user's name

  strcat(big_buffer, "your name: <input type=\"text\" name=\"user\" size=");
  sprintf(buffer, "%d", MAX_NAME_LEN);
  strcat(big_buffer, buffer);
  strcat(big_buffer, " maxlength=");
  strcat(big_buffer, buffer);
  strcat(big_buffer, "><br>\n\n");

  // use a table to keep the pop-up selections for reservation start and
  // finish dates nicely lined up

  strcat(big_buffer, "<table>\n");

  // headers for table columns

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td></td>\n");
  strcat(big_buffer, "<td>month</td>\n");
  strcat(big_buffer, "<td>date</td>\n");
  strcat(big_buffer, "<td>year</td>\n");
  strcat(big_buffer, "<td>hour</td>\n");
  strcat(big_buffer, "<td>min</td>\n");
  strcat(big_buffer, "</tr>\n");

  // this table row defines the reservation start date and time

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td>from:</td>\n");

  popup_month_to_big_buffer("from_month");
  popup_date_to_big_buffer("from_date");
  popup_year_to_big_buffer("from_year");
  popup_hour_to_big_buffer("from_hour");
  popup_min_to_big_buffer("from_min");

  strcat(big_buffer, "</tr>\n");

  // this table row defines the reservation finish date and time

  strcat(big_buffer, "<tr>\n");
  strcat(big_buffer, "<td>to:</td>\n");

  popup_month_to_big_buffer("to_month");
  popup_date_to_big_buffer("to_date");
  popup_year_to_big_buffer("to_year");
  popup_hour_to_big_buffer("to_hour");
  popup_min_to_big_buffer("to_min");

  strcat(big_buffer, "</tr>\n");
  strcat(big_buffer, "</table>\n\n");

  // create a pop-up list of actions

  strcat(big_buffer, "action\n");
  strcat(big_buffer, "<select name=\"action\" size=1>\n");
  strcat(big_buffer, "  <option> add new reservation\n");
  strcat(big_buffer, "  <option> delete old reservation\n");
  strcat(big_buffer, "</select>\n\n");

  // create a pop-up list of old reservations

  strcat(big_buffer, "old reservations\n");
  strcat(big_buffer, "<select name=\"res\" size=1>\n");
  for(i = 0; i < all_data.res_count; ++i)
    {
    create_res_summary(buffer, all_data.all_res[i].start,
                       all_data.all_res[i].name);
    strcat(big_buffer, "  <option> ");
    strcat(big_buffer, buffer);
    strcat(big_buffer, "\n");
    }
  strcat(big_buffer, "</select>\n\n");

  // finish off the page with a few buttons

  strcat(big_buffer, "<br>\n");
  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"cancel\">\n");
  strcat(big_buffer, "<input type=\"submit\" name=\"submit_button\" value=\"GO\">\n\n");

  strcat(big_buffer, "</body>\n");
  strcat(big_buffer, "</html>\n");

  // get rid of memory we no longer need

  delete [] all_data.spec.description;
  delete [] all_data.all_res;
  }




// Convert a time_t value to an ascii date/time string,
// such as    04/27/02 @ 1630

void convert_time_t_to_ascii(char* buffer, time_t & t_time)

  {
  struct tm *ts;
  int year_tmp;

  ts = localtime(&t_time);
  year_tmp = ( ts->tm_year ) % 100;
  sprintf(buffer, "%d/%d/%2.2d @ %2.2d%2.2d", ts->tm_mon+1, ts->tm_mday, 
          year_tmp, ts->tm_hour, ts->tm_min);
  }




// Convert a name + time_t value to an ascii string, such as
//   Sanderson 0900 9/20/02

void create_res_summary(char* buffer, const time_t t_time, char* name)

  {
  struct tm *ts;
  char *last_name;
  int year_tmp;

  last_name = strrchr(name, ' ');
  if (last_name == NULL)
    { last_name = name; }

  ts = localtime(&t_time);
  year_tmp = ts->tm_year % 100;
  sprintf(buffer, "%s %2.2d%2.2d %d/%d/%2.2d", last_name, ts->tm_hour, 
          ts->tm_min, ts->tm_mon+1, ts->tm_mday, year_tmp);
  }




void popup_month_to_big_buffer(const char *the_name)
  {

  strcat(big_buffer, "<td>");
  strcat(big_buffer, "<select name=\"");
  strcat(big_buffer, the_name);
  strcat(big_buffer, "\" size=1>\n");
  strcat(big_buffer, "  <option selected> Jan\n");
  strcat(big_buffer, "  <option> Feb\n");
  strcat(big_buffer, "  <option> Mar\n");
  strcat(big_buffer, "  <option> Apr\n");
  strcat(big_buffer, "  <option> May\n");
  strcat(big_buffer, "  <option> Jun\n");
  strcat(big_buffer, "  <option> Jul\n");
  strcat(big_buffer, "  <option> Aug\n");
  strcat(big_buffer, "  <option> Sep\n");
  strcat(big_buffer, "  <option> Oct\n");
  strcat(big_buffer, "  <option> Nov\n");
  strcat(big_buffer, "  <option> Dec\n");
  strcat(big_buffer, "</select>");
  strcat(big_buffer, "</td>\n");
  }




void popup_date_to_big_buffer(const char *the_name)
  {

  strcat(big_buffer, "<td>");
  strcat(big_buffer, "<select name=\"");
  strcat(big_buffer, the_name);
  strcat(big_buffer, "\" size=1>\n");
  strcat(big_buffer, "  <option selected> 1\n");
  strcat(big_buffer, "  <option> 2\n");
  strcat(big_buffer, "  <option> 3\n");
  strcat(big_buffer, "  <option> 4\n");
  strcat(big_buffer, "  <option> 5\n");
  strcat(big_buffer, "  <option> 6\n");
  strcat(big_buffer, "  <option> 7\n");
  strcat(big_buffer, "  <option> 8\n");
  strcat(big_buffer, "  <option> 9\n");
  strcat(big_buffer, "  <option> 10\n");
  strcat(big_buffer, "  <option> 11\n");
  strcat(big_buffer, "  <option> 12\n");
  strcat(big_buffer, "  <option> 13\n");
  strcat(big_buffer, "  <option> 14\n");
  strcat(big_buffer, "  <option> 15\n");
  strcat(big_buffer, "  <option> 16\n");
  strcat(big_buffer, "  <option> 17\n");
  strcat(big_buffer, "  <option> 18\n");
  strcat(big_buffer, "  <option> 19\n");
  strcat(big_buffer, "  <option> 20\n");
  strcat(big_buffer, "  <option> 21\n");
  strcat(big_buffer, "  <option> 22\n");
  strcat(big_buffer, "  <option> 23\n");
  strcat(big_buffer, "  <option> 24\n");
  strcat(big_buffer, "  <option> 25\n");
  strcat(big_buffer, "  <option> 26\n");
  strcat(big_buffer, "  <option> 27\n");
  strcat(big_buffer, "  <option> 28\n");
  strcat(big_buffer, "  <option> 29\n");
  strcat(big_buffer, "  <option> 30\n");
  strcat(big_buffer, "  <option> 31\n");
  strcat(big_buffer, "</select>");
  strcat(big_buffer, "</td>\n");
  }




void popup_year_to_big_buffer(const char *the_name)
  {

  strcat(big_buffer, "<td>");
  strcat(big_buffer, "<select name=\"");
  strcat(big_buffer, the_name);
  strcat(big_buffer, "\" size=1>\n");
  strcat(big_buffer, "  <option selected> 2002\n");
  strcat(big_buffer, "  <option> 2003\n");
  strcat(big_buffer, "  <option> 2004\n");
  strcat(big_buffer, "  <option> 2006\n");
  strcat(big_buffer, "</select>");
  strcat(big_buffer, "</td>\n");
  }




void popup_hour_to_big_buffer(const char *the_name)
  {

  strcat(big_buffer, "<td>");
  strcat(big_buffer, "<select name=\"");
  strcat(big_buffer, the_name);
  strcat(big_buffer, "\" size=1>\n");
  strcat(big_buffer, "  <option selected> 00\n");
  strcat(big_buffer, "  <option> 01\n");
  strcat(big_buffer, "  <option> 02\n");
  strcat(big_buffer, "  <option> 03\n");
  strcat(big_buffer, "  <option> 04\n");
  strcat(big_buffer, "  <option> 05\n");
  strcat(big_buffer, "  <option> 06\n");
  strcat(big_buffer, "  <option> 07\n");
  strcat(big_buffer, "  <option> 08\n");
  strcat(big_buffer, "  <option> 09\n");
  strcat(big_buffer, "  <option> 10\n");
  strcat(big_buffer, "  <option> 11\n");
  strcat(big_buffer, "  <option> 12\n");
  strcat(big_buffer, "  <option> 13\n");
  strcat(big_buffer, "  <option> 14\n");
  strcat(big_buffer, "  <option> 15\n");
  strcat(big_buffer, "  <option> 16\n");
  strcat(big_buffer, "  <option> 17\n");
  strcat(big_buffer, "  <option> 18\n");
  strcat(big_buffer, "  <option> 19\n");
  strcat(big_buffer, "  <option> 20\n");
  strcat(big_buffer, "  <option> 21\n");
  strcat(big_buffer, "  <option> 22\n");
  strcat(big_buffer, "  <option> 23\n");
  strcat(big_buffer, "</select>");
  strcat(big_buffer, "</td>\n");
  }




void popup_min_to_big_buffer(const char *the_name)
  {

  strcat(big_buffer, "<td>");
  strcat(big_buffer, "<select name=\"");
  strcat(big_buffer, the_name);
  strcat(big_buffer, "\" size=1>\n");
  strcat(big_buffer, "  <option selected> 00\n");
  strcat(big_buffer, "  <option> 15\n");
  strcat(big_buffer, "  <option> 30\n");
  strcat(big_buffer, "  <option> 45\n");
  strcat(big_buffer, "</select>");
  strcat(big_buffer, "</td>\n");
  }




void print_warning_msg()
  {
  if (warning_msg[0] != '\0')
    {
    strcat(big_buffer, "\n<hr>\n");
    strcat(big_buffer, "<h3>ERROR</h3>\n");
    strcat(big_buffer, warning_msg);
    strcat(big_buffer, "\n<hr>\n");
    }
  }