/**
 * General API for VPR
 *
 * VPR is a CAD tool used to conduct FPGA architecture exploration.  It takes, as input, a technology-mapped netlist and a description of the FPGA architecture being investigated.
 * VPR then generates a packed, placed, and routed FPGA (in .net, .place, and .route files respectively) that implements the input netlist
 *
 * Software tools interfacing to VPR should generally call just the functions defined here
 * For advanced/power users, you can call functions defined elsewhere in VPR or modify the data structures directly at your discretion but be aware that doing so can break the correctness of this tool
 *
 * General Usage:
 * 1. vpr_init
 * 2. vpr_pack
 * 3. vpr_init_pre_place_and_route
 * 4. vpr_place_and_route
 * 5. vpr_free_all
 *
 * If you are a new developer, key files to begin understanding this code base are:
 * 1.  libarchfpga/physical_types.h - Data structures that define the properties of the FPGA architecture
 * 2.  vpr_types.h - Very major file that defines the core data structures used in VPR.  This includes detailed architecture information, user netlist data structures, and data structures that describe the mapping between those two.
 * 3.  globals.h - Defines the global variables used by VPR.
 *
 * Author: Jason Luu
 * June 21, 2012
 */

#ifndef VPR_API_H
#define VPR_API_H

#include <vector>
#include "physical_types.h"
#include "vpr_types.h"
#include "read_options.h"
#include "globals.h"
#include "read_xml_arch_file.h"
#include "vpr_utils.h"
#include "place_macro.h"
#include "timing_info_fwd.h"
#include "echo_files.h"
#include "RoutingDelayCalculator.h"

#include "vpr_error.h"

/* 
 * Main VPR Operations 
 */
void vpr_init(const int argc, const char** argv, t_options* options, t_vpr_setup* vpr_setup, t_arch* arch);
void vpr_initialize_logging();
void vpr_init_with_options(const t_options* options, t_vpr_setup* vpr_setup, t_arch* arch);

bool vpr_flow(t_vpr_setup& vpr_setup, t_arch& arch); //Run the VPR CAD flow

/*
 * Stage operations
 */
bool vpr_pack_flow(t_vpr_setup& vpr_setup, const t_arch& arch);    //Perform, load or skip the packing stage
bool vpr_pack(t_vpr_setup& vpr_setup, const t_arch& arch);         //Perform packing
void vpr_load_packing(t_vpr_setup& vpr_setup, const t_arch& arch); //Loads a previous packing

bool vpr_place_flow(t_vpr_setup& vpr_setup, const t_arch& arch);     //Perform, load or skip the placement stage
void vpr_place(t_vpr_setup& vpr_setup, const t_arch& arch);          //Perform placement
void vpr_load_placement(t_vpr_setup& vpr_setup, const t_arch& arch); //Loads a previous placement

RouteStatus vpr_route_flow(t_vpr_setup& vpr_setup, const t_arch& arch); //Perform, load or skip the routing stage
RouteStatus vpr_route_fixed_W(t_vpr_setup& vpr_setup,
                              const t_arch& arch,
                              int fixed_channel_width,
                              std::shared_ptr<SetupHoldTimingInfo> timing_info,
                              std::shared_ptr<RoutingDelayCalculator> delay_calc,
                              vtr::vector<ClusterNetId, float*>& net_delay); //Perform routing at a fixed channel width)
RouteStatus vpr_route_min_W(t_vpr_setup& vpr_setup,
                            const t_arch& arch,
                            std::shared_ptr<SetupHoldTimingInfo> timing_info,
                            std::shared_ptr<RoutingDelayCalculator> delay_calc,
                            vtr::vector<ClusterNetId, float*>& net_delay); //Perform routing to find the minimum channel width
RouteStatus vpr_load_routing(t_vpr_setup& vpr_setup,
                             const t_arch& arch,
                             int fixed_channel_width,
                             std::shared_ptr<SetupHoldTimingInfo> timing_info,
                             vtr::vector<ClusterNetId, float*>& net_delay); //Loads a previous routing

bool vpr_analysis_flow(t_vpr_setup& vpr_setup, const t_arch& Arch, const RouteStatus& route_status); //Perform or skips the analysis stage
void vpr_analysis(t_vpr_setup& vpr_setup, const t_arch& Arch, const RouteStatus& route_status);      //Perform post-implementation analysis

void vpr_create_device(t_vpr_setup& vpr_setup, const t_arch& Arch);                   //Create the device (grid + rr graph)
void vpr_create_device_grid(const t_vpr_setup& vpr_setup, const t_arch& Arch);        //Create the device grid
void vpr_create_rr_graph(t_vpr_setup& vpr_setup, const t_arch& arch, int chan_width); //Create routing graph at specified channel width

void vpr_init_graphics(const t_vpr_setup& vpr_setup, const t_arch& arch);
void vpr_close_graphics(const t_vpr_setup& vpr_setup);

void vpr_setup_clock_networks(t_vpr_setup& vpr_setup, const t_arch& Arch);
void vpr_free_vpr_data_structures(t_arch& Arch, t_vpr_setup& vpr_setup);
void vpr_free_all(t_arch& Arch, t_vpr_setup& vpr_setup);

/* Display general info to user */
void vpr_print_title();
void vpr_print_args(int argc, const char** argv);

/****************************************************************************************************
 * Advanced functions
 *  Used when you need fine-grained control over VPR that the main VPR operations do not enable
 ****************************************************************************************************/
/* Read in user options */
void vpr_read_options(const int argc, const char** argv, t_options* options);
/* Read in arch and circuit */
void vpr_setup_vpr(t_options* Options,
                   const bool TimingEnabled,
                   const bool readArchFile,
                   t_file_name_opts* FileNameOpts,
                   t_arch* Arch,
                   t_model** user_models,
                   t_model** library_models,
                   t_netlist_opts* NetlistOpts,
                   t_packer_opts* PackerOpts,
                   t_placer_opts* PlacerOpts,
                   t_annealing_sched* AnnealSched,
                   t_router_opts* RouterOpts,
                   t_analysis_opts* AnalysisOpts,
                   t_det_routing_arch* RoutingArch,
                   std::vector<t_lb_type_rr_node>** PackerRRGraph,
                   std::vector<t_segment_inf>& Segments,
                   t_timing_inf* Timing,
                   bool* ShowGraphics,
                   int* GraphPause,
                   bool* SaveGraphics,
                   t_power_opts* PowerOpts);

/* Check inputs are reasonable */
void vpr_check_arch(const t_arch& Arch);
/* Verify settings don't conflict or otherwise not make sense */
void vpr_check_setup(const t_packer_opts& PackerOpts,
                     const t_placer_opts& PlacerOpts,
                     const t_router_opts& RouterOpts,
                     const t_det_routing_arch& RoutingArch,
                     const std::vector<t_segment_inf>& Segments,
                     const t_timing_inf& Timing,
                     const t_chan_width_dist& Chans);
/* Show current setup */
void vpr_show_setup(const t_vpr_setup& vpr_setup);
void vpr_power_estimation(const t_vpr_setup& vpr_setup,
                          const t_arch& Arch,
                          const SetupTimingInfo& timing_info,
                          const RouteStatus& route_status);

/* Output file names management */
void vpr_alloc_and_load_output_file_names(const char* default_name);
void vpr_set_output_file_name(enum e_output_files ename, const char* name, const char* default_name);
char* vpr_get_output_file_name(enum e_output_files ename);

/* Prints user file or internal errors for VPR */
void vpr_print_error(const VprError& vpr_error);

#endif