import logging
import os
import yaml
import json
import glob
import shutil
import git

def copy_print(src: str, dest: str):
    os.makedirs(os.path.dirname(dest), exist_ok=True)
    logging.info(f"  -> {dest}")
    shutil.copy2(src, dest)


def copy_print_glob(pattern: str, dest_dir: str):
    for file in glob.glob(pattern):
        copy_print(file, os.path.join(dest_dir, os.path.basename(file)))


class CaravelConfig():

    def __init__(self, config, projects, modules_yaml_name: str):
        self.config = config
        self.projects = projects
        self.script_dir = os.path.dirname(os.path.realpath(__file__))
        self.modules_yaml_name = modules_yaml_name

    def write_gl_config(self):
        with open('verilog/includes/includes.gl.caravel_user_project', 'w') as fh:
            fh.write('-v $(USER_PROJECT_VERILOG)/gl/user_project_wrapper.v\n')
            fh.write('-v $(USER_PROJECT_VERILOG)/gl/tt_ctrl.v\n')
            fh.write('-v $(USER_PROJECT_VERILOG)/gl/tt_mux.v\n')
            for project in self.projects:
                fh.write(f'-v $(USER_PROJECT_VERILOG)/../projects/{project.top_module}/{project.get_gl_verilog_filename()}\n')

    def configure_mux(self):
        with open(self.modules_yaml_name, 'r') as modules_file:
            module_config = yaml.safe_load(modules_file)
            configured_macros = set(map(lambda mod: mod['name'], module_config['modules']))
            logging.info(f"found {len(configured_macros)} preconfigured macros: {configured_macros}")
            for project in self.projects:
                if project.unprefixed_name not in configured_macros:
                    module_config['modules'].append({'name': project.unprefixed_name})

        with open('tt-multiplexer/cfg/modules.yaml', 'w') as mux_modules_file:
            yaml.dump(module_config, mux_modules_file)

        res = os.system("make -C tt-multiplexer gensrc")
        if res != 0:
            logging.error("Failed to generate multiplexer placement configuration")
            exit(1)

        mux_index = {}
        mux_index_reverse = {}
        with open('tt-multiplexer/cfg/modules_placed.yaml') as placed_modules_file:
            placed_modules = yaml.safe_load(placed_modules_file)
            for module in placed_modules['modules']:
                mux_address = (module['y'] << 5) + module['x']
                module_name = 'tt_um_' + module['name']
                project = next(p for p in self.projects if p.top_module == module_name)
                mux_index[mux_address] = {
                    "macro": module_name,
                    "x": module['x'],
                    "y": module['y'],
                    "tiles": f"{module['width']}x{module['height']}",
                    "repo": project.git_url,
                    "commit": project.commit_id,
                }
                mux_index_reverse[module_name] = mux_address
            
        for project in self.projects:
            if project.top_module not in mux_index_reverse:
                logging.error(f"no placement found for {project}!")
                exit(1)
            project.mux_address = mux_index_reverse[project.top_module]
        
        repo = git.Repo(".")

        shuttle_index_data = {
            "shuttle": self.config["name"],
            "repo": list(repo.remotes[0].urls)[0],
            "commit": repo.commit().hexsha,
            "mux": mux_index,
        }

        with open('shuttle_index.json', 'w') as shuttle_index_file:
            json.dump(shuttle_index_data, shuttle_index_file, indent=2)

    def list(self):
        for project in self.projects:
            logging.info(project)


    def find_last_run(self, macro: str):
        runs = f"tt-multiplexer/ol2/{macro}/runs/"
        runlist = sorted(
            [r for r in os.listdir(runs) if r.startswith("RUN_") and os.path.isdir(os.path.join(runs, r))]
        )
        if len(runlist) == 0:
            print(f"Error: no runs found for {macro}")
            exit(1)

        return os.path.join(runs, runlist[-1])


    def copy_macros(self):
        logging.info('copying macros to tt_top:')
        copy_print_glob("projects/*/*.gds", "tt-multiplexer/ol2/tt_top/gds")
        copy_print_glob("projects/*/*.lef", "tt-multiplexer/ol2/tt_top/lef")
        copy_print_glob("projects/*/*.v", "tt-multiplexer/ol2/tt_top/verilog")
        macros = ["tt_ctrl", "tt_mux"]
        for macro in macros:
            lastrun = self.find_last_run(macro)
            copy_print(f"{lastrun}/final/gds/{macro}.magic.gds", f"tt-multiplexer/ol2/tt_top/gds/{macro}.gds")
            copy_print(f"{lastrun}/final/lef/{macro}.lef", f"tt-multiplexer/ol2/tt_top/lef/{macro}.lef")


    def copy_final_results(self):
        macros = ["tt_ctrl", "tt_mux", "tt_top"]

        logging.info('copying final results:')
        for macro in macros:
            lastrun = self.find_last_run(macro)
            macro_name = macro if macro != "tt_top" else "user_project_wrapper"
            logging.info(f"** {macro_name} **")
            logging.info(f"  FROM {lastrun}")
            copy_print(f"{lastrun}/final/gds/{macro_name}.magic.gds", f"gds/{macro_name}.gds")
            copy_print(f"{lastrun}/final/lef/{macro_name}.lef", f"lef/{macro_name}.lef")
            copy_print(f"{lastrun}/final/pnl/{macro_name}.pnl.v", f"verilog/gl/{macro_name}.v")
            copy_print(f"{lastrun}/final/nl/{macro_name}.nl.v", f"verilog/gl/{macro_name}.nl.v")
            shutil.copytree(
                f"{lastrun}/final/spef", f"spef/", copy_function=copy_print, dirs_exist_ok=True
            )
            copy_print(f"{lastrun}/final/spef/nom_/{macro_name}.nom.spef", f"spef/{macro_name}.spef")

    def create_efabless_submission(self):
        logging.info("creating efabless submission directory:")
        lastrun = self.find_last_run("tt_top")
        copy_print("README.md", "efabless/README.md")
        copy_print("shuttle_index.json", "efabless/shuttle_index.json")
        copy_print("verilog/rtl/user_defines.v", "efabless/verilog/rtl/user_defines.v")
        copy_print(f"{lastrun}/final/pnl/user_project_wrapper.pnl.v", f"efabless/verilog/gl/user_project_wrapper.v")
        copy_print(f"{lastrun}/final/gds/user_project_wrapper.magic.gds", f"efabless/gds/user_project_wrapper.gds")
        copy_print(f"{lastrun}/final/lef/user_project_wrapper.lef", f"efabless/lef/user_project_wrapper.gds")