#include "metadataops.h"
#include "StandardConstants.h"
#include "StringUtils.h"

/*
Name: addNode
Process: adds metadata node to linked list recursively, handles empty list
Function Input/Parameters: ptr to head or next linked node (OpCodeType *),
                           ptr to new node (OpCodeType *)
Function Output/Parameters: none
Function Output/Returned: pointer to previous node, or head node (OpCodeType *)
Device Input/Device: none
Device Output/Device: none
Dependencies: malloc, copyString
*/
OpCodeType *addNode(OpCodeType *localPtr, OpCodeType *newNode)
{
    // initialize function and variables
    // check for local pointer assigned to null
        // access memory for new link/node
            // fct: malloc
        // assign all three values to newly created node
        // assign next pointer to null
            // fct: copyString
        // return current local pointer
    // assume end of list not found
    // assign recursive fct to current node's next link
        // fct: addNode
    // return current local ptr
    return NULL;
}

/*
Name: clearMetaDataList
Process: recursively traverses list, frees dynamically allocated nodes
Function Input/Parameters: node opcode (const OpCodeType *)
Function Output/Parameters: none
Function Output/Returned: NULL (OpCodeType *)
Device Input/Device: none
Device Output/Device: none
Dependencies: ???
*/
OpCodeType *clearMetaDataList(OpCodeType *localPtr)
{
    // initialize function and variables
    // check for local pointer not set to null (list not empty)
        // call recursive function with next pointer
            // fct: clearMetaDataList
        // after recursive call, release mem to OS
            // fct: free
        // set given pointer to NULL
    // return NULL to calling fct
    return NULL;
}

/*
Name: displayMetaData
Process: data dump/display of all opcode items
Function Input/Parameters: pointer to
                           head of opcode/metadata list (const OpCodeType *)
Function Output/Parameters: none
Function Output/Returned: calculated time (int)
Device Input/Device: none
Device Output/Device: none
Dependencies: printf, compareString
*/
void displayMetaData(const OpCodeType *localPtr)
{
    // initialize function and variables
    // display title, with underline
        // fct: printf
    // loop to end of linked list
        // print leader
            // fct: printf
        // print opcode pid
            // fct: printf
        // print opcode command
            // fct: printf
        // check for dev op
            // print in/out parameter
                // fct: printf
        // otherwise, assume other than dev
            // print NA
                // fct: printf
        // print first string argument
            // fct: printf
        // print first int argument
            // fct: printf
        // print second int argument
            // fct: printf
        // print op end time
        // endline print
            // fct: printf
        // assign local pointer to next node
    // void function, no return.
}

/*
Name: getCommand
Process: parses thre letter command part of opcode str
Function Input/Parameters: input opcode str (const char *),
                           starting index (int)
Function Output/Parameters: parsed command (char *)
Function Output/Returned: updated starting index for use by calling fct (int)
Device Input/Device: none
Device Output/Device: none
Dependencies: none
*/
int getCommand(char *cmd, const char *inputStr, int index)
{
    // initialize function and variables
    // loop across command length
        // assign character from input string to buffer string
        // increment index
        // set next character to null character
    // return current index
    return 0;
}

/*
Name: getMetaData
Process: main driver function to upload, parse, and store list
         of op code commands in a linked list
Function Input/Parameters: file name (const char *)
Function Output/Parameters: ptr to opcode linked list head ptr (OpCodeType **),
                            result msg of fct state after completion (char *)
Function Output/Returned: Boolean result of operation (bool)
Device Input/File: op code list uploaded
Device Output/Device: none
Dependencies: copyString, fopen, getStringToDelimiter, compareString, fclose,
              malloc, getOpCommand, updateStartCount, updateEndCount,
              clearMetaDataList, free, addNode
*/
bool getMetaData(const char *fileName, 
                                 OpCodeType **opCodeDataHead, char *endStateMsg)
{
    // initialize function and variables
        // iniitialize read only constant
        // initialize variables
    // initialize opcode data pointer in case of return error
    // initialize end state message
        // fct: copyString
    // open file for reading
        // fct: fopen
    // check for file open failure
        // set end state message
            // fct: copyString
        // return file access error
    // check first line for correct leader
        // fct: getStringToDelimiter, compareString
            // close file
                // fct: fclose
            // set end state message
                // fct: copyString
            // return corrupt descriptor error
    // allocate memory for the temporary data structure
        // fct: malloc
    // get the first op command
        // fct: getOpCommand
    // get start and end counts for later comparison
        // fct: updateStartCount, updateEndCount
    // check for failure of first complete op command
        // close file
            // fct: fclose
        // clear data from the structure list
            // fct: clearMetaDataList
        // free temporary structure memory
            // fct: free
        // set end state message
            // fct: copyString
        // return result of operation
    // loop across all remaining op commands
    // (while complete op commands are found)
        // add the new op command to the linked list
            // fct: addNode
        // get a new op command
            // fct: getOpCommand
        // update start and end counts for later comparison
            // fct: updateStartCount, updateEndCount
    // end loop across all remaining op commands
    // check for last op command found
        // check for start and end opcode counts equal
            // add the last node to the linked list
                // fct: addNode
            // set access result to no error for later operation
            // check last line for incorrect end descriptor
                // fct: getStringToDelimiter, compareString
                    // set access result to corrupted descriptor error
                    // set end state message
                        // fct: copyString
        // otherwise, assume start/end counts not equal
            // close file
                // fct: fclose
            // clear data from the structure list
                // fct: clearMetaDataList
            // free temporary structure memory
                // fct: free
            // set access result to error
            // set end state message
                // fct: copyString
            // return result of operation
    // otherwise, assume didn't find end
        // set end state message
            // fct: copyString
        // unset return state
    // check for any errors found (not no error)
        // clear the op command list
            // fct: clearMetaDataList
    // close access file
        // fct: free
    // assign temporary local head ptr to parameter return ptr
    // return access result
    return false;
}

/*
Name: getOpCommand
Process: acquires one op command line from a previously opened file,
         parses it, and sets various struct members according to the
         three letter command
Function Input/Parameters: ptr to open file handle (FILE *)
Function Output/Parameters: ptr to one opcode struct (OpCodeType *)
Function Output/Returned: coded result of operation (OpCodeMessages)
Device Input/File: opcode line uploaded
Device Output/Device: none
Dependencies: getStringToDelimiter, getCommand, copyString, verifyValidCommand, 
              compareString, getStringArg, verifyFirstStringArg, getNumberArg
*/
OpCodeMessages getOpCommand(FILE *filePtr, OpCodeType *inData)
{
    // initialize function and variables
        // initialize local constants
        // initialize other variables
    // get whole op command as string, check for successful access
        // fct: getStringToDelimiter
        // get three-letter command
            // fct: getCommand
        // assign op command to node
            // fct: copyString
    // otherwise, assume unsuccessful access
        // set ptr to data structure to null
        // return op command access failure
    // verify op command
        // return op command error
    // set all struct values that may not be initialized to defaults
    // check for device command
        // get in/out arg
        // set device in/out arg
        // check correct argument
            // return argument error
    // get first string arg
    // set device in/out arg
    // check for legit first string arg
        // return arg error
    // check for last op command found
        // return last op command found message
    // check for app start seconds argument
        // get number argument
            // fct: getNumberArg
        // check for failed number access
            // set failure flag
        // set first int argument to number
    // check for cpu cycle time
        // get number argument
            // fct: getNumberArg
        // check for failed number access
            // set failure flag
        // set first int argument to number
    // check for device cycle time
        // get number argument
            // fct: getNumberArg
        // check for failed number access
            // set failure flag
        // set first int argument to number
    // check for memory base and offset
        // get number argument for base
            // fct: getNumberArg
        // check for failed number access
            // set failure flag
        // set first int argument to number
        // get number argument for offset
            // fct: getNumberArg
        // check for failed number access
            // set failure flag
        // set second int argument to number
    // check int args for upload failure
        // return corrupt op command found message
    // return complete op command found message
    return 0;
}

/*
Name: getNumberArg
Process: starts at given index, captures 
         and assembles int arg, returns as parameter
Function Input/Parameters: input str (const char *), starting index (int)
Function Output/Parameters: pointer to captured integer value
Function Output/Returned: updated index for next function start
Device Input/Device: none
Device Output/Device: none
Dependencies: isDigit
*/
int getNumberArg(int *number, const char *inputStr, int index)
{
    // initialize function and variables
    // loop to skip whitespace
        // increment the index
    // loop across string length
        // set digit found flag
        // assign digit to output
        // increment index and multiplier
    // check for digit not founf
        // set number to BAD_ARG_VAL, use dereference for ptr
    // return current index
    return 0;
}

/*
Name: getStringArg
Process: starts at given index, captures 
         and assembles str arg, returns as parameter
Function Input/Parameters: input str (const char *), starting index (int)
Function Output/Parameters: ptr to captured string argument (char *)
Function Output/Returned: updated index for next fct start
Device Input/Device: none
Device Output/Device: none
Dependencies: none
*/
int getStringArg(char *strArg, const char *inputStr, int index)
{
    // initialize function and variables
    // loop to skip whitespace
        // increment index
    // loop across string length
        // assign character from input string to buffer string
        // increment index
        // set next character to null character
    // return current index
    return 0;
}

/*
Name: isDigit
Process: tests character parameter for digit, 
         returns true if is digit, false otherwise
Function Input/Parameters: test character (char)
Function Output/Parameters: none
Function Output/Returned: bool result of test (bool)
Device Input/Device: none
Device Output/Device: none
Dependencies: none
*/
bool isDigit(char testChar)
{
    // check for test character between characters '0' - '9'
        // return true
    // otherwise, assume character if not digit, return false
    return false;
}

/*
Name: updateEndCount
Process: manages count of "end" arguments 
         to be compared at end of process input
Function Input/Parameters: initial count (int),
                           test string for "end" (const char *)
Function Output/Parameters: none
Function Output/Returned: updated count, if "end" string found, 
                          otherwise no change
Device Input/Device: none
Device Output/Device: none
Dependencies: compareString
*/
int updateEndCount(int count, const char *opString)
{
    // check for "end" in op string
        // fct: compareString
        // return incremented end count
    // return unchanged end count
    return 0;
}

/*
Name: updateStartCount
Process: manages count of "start" arguments
         to be compared at start of process input
Function Input/Parameters: initial count (int),
                           test string for "start" (const char *)
Function Output/Parameters: none
Function Output/Returned: updated count, if "start" string found,
                          otherwise no change
Device Input/Device: none
Device Output/Device: none
Dependencies: compareString
*/
int updateStartCount(int count, const char *opString)
{
    // check for "start" in op string
    // fct: compareString
    // return incremented start count
    // return unchanged start count
    return 0;
}

/*
Name: verifyFirstStringArg
Process: checks for all possibilities of first argument string of op command
Function Input/Parameters: test string (const char *)
Function Output/Parameters: none
Function Output/Returned: bool result of test (bool)
Device Input/Device: none
Device Output/Device: none
Dependencies: compareString
*/
bool verifyFirstStringArg(const char *strArg)
{
    // check for string holding correct first argument
        // fct: compareString
        // return true
    // otherwise, assume test fail, return false
    return false;
}

/*
Name: verifyValidCommand
Process: checks for all possibilities of three-letter opcode command
Function Input/Parameters: test string for command (const char *)
Function Output/Parameters: none
Function Output/Returned: bool result of test (bool)
Device Input/Device: none
Device Output/Device: none
Dependencies: compareString
*/
bool verifyValidCommand(char *testCmd)
{
    // check for string holding three-letter opcode command
        // fct: compareString
        // return true
    // otherwise, assume test failure, return false
    return false;
}