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// @name SimpleRP API
// @author: Motive
// @website: www.roleplayershub.com
// @email: trelorn@gmail.com
// ---------------------------------

// Needed vars:
// Array Size 12 boolean udg_IsAdmin Default: False
// Single string udg_ShortMapName Default: "SimpleRP API"
// Single string udg_prefix Default: "@"
// Single unittype udg_SpawnerType 
globals
    string              udg_ShortMapName    = "SimpleRP API"
    string              udg_prefix          = "@"
    boolean array       udg_IsAdmin           
    unittype            udg_SpawnerType       
endglobals

// void RP_SendErrorMessageToPlayer(player p, string message)
// Sends an error message to a player.
function RP_SendErrorMessageToPlayer takes player p, string message returns nothing
    local string send = "|cff0000" + message
    call DisplayTextToPlayer(p, 0, 0, send)    
endfunction

// bool RP_IsAdmin(player p)
// Returns true/false, depending on whether or not a player is an admin
function RP_IsAdmin takes player p returns boolean
    local integer id = GetPlayerId(p)
    return udg_IsAdmin[id]
endfunction

// int RP_FindString(string haystack, string needle)
// Returns the position of the needle in the haystack.
function RP_FindString takes string haystack, string needle, integer min returns integer
    local integer hlength = StringLength(haystack)
    local integer nlength = StringLength(needle)

    local integer curpos = min
    local integer result = -2
    
    local string temp = ""
    loop
        set temp = SubString(haystack, curpos, curpos + nlength)
        if temp == needle then
            set result = curpos
        else
            if curpos == hlength then
                set result = -1
            endif
        endif
        set curpos = curpos + 1
        exitwhen result != -2 
    endloop
    
    return result
endfunction

// private bool RP_GetValidSelectedUnitsPair()
function RP_GetValidSelectedUnitsPair takes nothing returns boolean
    if GetOwningPlayer(GetEnumUnit()) != GetTriggerPlayer() then
        return false
    endif
    
    if IsUnitType(GetEnumUnit(), udg_SpawnerType) then
        return false
    endif
    
    return true
endfunction

// group RP_GetValidSelectedUnits(plr)
function RP_GetValidSelectedUnits takes player plr returns group
    local group units = GetUnitsOfPlayerMatching(plr, Condition(function RP_GetValidSelectedUnitsPair))
    return units
endfunction

// private void RP_HandleUnitKillCommandPair()
function RP_HandleUnitKillCommandPair takes nothing returns nothing
    call KillUnit(GetEnumUnit())
endfunction

// void RP_HandleUnitKillCommand(plr)
function RP_HandleUnitKillCommand takes player plr returns nothing
    local group units = RP_GetValidSelectedUnits(plr)
    call ForGroupBJ(units, function RP_HandleUnitKillCommandPair)
endfunction

// void RP_HandleUnitCommands(player plr, string message)
// Handles commands dealing with the "unit" command type
function RP_HandleUnitCommands takes player plr, string message returns nothing
    // BEGIN PARAMETERS TEMPLATE
    local string command
    local integer array spaceLocations 
    local string array parameters

    local string tstring    
    local integer counter = 0
    local integer temp = 0   
    local integer tpos = 0
    loop
        set temp = RP_FindString(message, " ", tpos)
        if temp > 0 then
            set spaceLocations[counter] = temp
            set counter = counter + 1
        endif
        set tpos = tpos + temp
        exitwhen temp < 0        
    endloop
    
    set temp = 0    
    set tpos = 0
    loop
        set tstring = SubString(message, tpos, spaceLocations[temp]-1)
        set tpos = spaceLocations[temp]+1
        set parameters[temp] = tstring
        set temp = temp + 1
        exitwhen temp >= counter
    endloop
    // END PAREMETERS TEMPLATE
    
    if parameters[0] == "kill" then
    endif
endfunction

// void RP_HandleChatMessage(player plr, string message)
// Handles every chat message input by the player.
function RP_HandleChatMessage takes player plr, string message returns nothing
    local integer spaceLocation1
    local string commandtype
    local string firstChar = SubString(message, 1, 1)
    
    // Check for command prefix: @
    if firstChar != udg_prefix then
        return
    endif

    // Get the space after the command prefix: @unit" " kill
    // if we're missing a space, then it's not a valid command.    
    set spaceLocation1 = RP_FindString(message, " ", 0)
    if spaceLocation1 < 0 then
        call RP_SendErrorMessageToPlayer(plr, "Invalid command.")
        return
    endif
    
    // Get the command type. Ex: @"unit" kill
    // Terminate execution on calling the specific handler
    set commandtype = SubString(message, 2, spaceLocation1 - 1)    
    if commandtype == "unit" then
        call RP_HandleUnitCommands(plr, SubString(message, spaceLocation1 +1, StringLength(message)))
        return
    endif

    // We're lacking a valid command type :(   
    call RP_SendErrorMessageToPlayer(plr, udg_ShortMapName + " has no \"" + commandtype + "\" command type.")
endfunction