#!/usr/bin/env python3
# encoding: utf-8
"""
tmx_trackplacer -- a tool for placing map tracks using Tiled

This creates .tmx files (Tiled's format) based on the trackplacer's journey data.
The journey can be edited in Tiled using the "Insert Tile" tool, and then the .tmx
data converted back to the trackplacer parts of the .cfg file.

It can also read in a .cfg and then re-export it to a new .cfg file, to see if the
data is preserved. The format is chosen by the filename given to the --output option.

If a .jpg or .png file is given as the input, then the output will be a template .tmx
or .cfg file for drawing a track on top of that image.

Example usage:
* data/tools/tmx_trackplacer images/campaign_map.png --output temp.tmx
* data/tools/tmx_trackplacer data/campaigns/Northern_Rebirth/utils/bigmap.cfg --output temp.tmx
* data/tools/tmx_trackplacer data/campaigns/Northern_Rebirth/utils/bigmap.cfg --output temp.cfg
"""

import wesnoth.trackplacer3 as tp3

import argparse

if __name__ == "__main__":
    ap = argparse.ArgumentParser(usage=__doc__)
    ap.add_argument("file", metavar="string", help="Read input from this file")
    ap.add_argument("-o", "--output", metavar="string",
                            help='Write output into the specified file')
    ap.add_argument("--data-dir", metavar="dir",
                            help='Same as Wesnoth’s “--data-dir” argument')
    options = ap.parse_args()

    if options.data_dir is None:
        import os, sys
        APP_DIR,APP_NAME=os.path.split(os.path.realpath(sys.argv[0]))
        WESNOTH_ROOT_DIR=os.sep.join(APP_DIR.split(os.sep)[:-2])  # pop out "data" and "tools"
        options.data_dir=os.path.join(WESNOTH_ROOT_DIR,"data")

    journey = None
    if options.file:
        if options.file.endswith(".cfg"):
            reader = tp3.CfgFileFormat()
            (journey, metadata) = reader.read(options.file)
        elif options.file.endswith(".tmx"):
            reader = tp3.TmxFileFormat(wesnoth_data_dir=options.data_dir)
            (journey, metadata) = reader.read(options.file)
        elif options.file.endswith(".png") or options.file.endswith(".jpg"):
            journey = tp3.Journey()
            journey.mapfile = options.file
            metadata = None
        else:
            raise RuntimeError("Don't know how to handle input from this file type")

    if journey:
        print("Read data:", str(journey))
    else:
        raise RuntimeError("Failed to read journey data")

    if options.output:
        if options.output.endswith(".cfg"):
            print("Exporting as cfg")
            exporter = tp3.CfgFileFormat()
            exporter.write(options.output, journey, metadata)
        elif options.output.endswith(".tmx"):
            print("Exporting as tmx")
            exporter = tp3.TmxFileFormat(wesnoth_data_dir=options.data_dir)
            exporter.write(options.output, journey, metadata)
        else:
            raise RuntimeError("Don't know how to handle output to this file type")