#!/usr/bin/env python

import os

with open("version",'r') as f:
    version = f.read().strip().rsplit('=')[1]

d_default = {
  "VERSION" : version,
  "IRPF90" : 'irpf90',
  "FC" : 'gfortran -g -ffree-line-length-none -fPIC',
  "FCFLAGS" : '-O2',
  "RANLIB" : 'ranlib',
  "AR" : 'ar',
  "NINJA" : 'ninja',
  "CONFIG_FILES" : 
     ' '.join([ x for x in os.listdir('config') if x != '.empty'])
}

def create_make_config():

    with open("make.config",'w') as out:
        for var,default in d_default.iteritems():
            try:
                cur = os.environ[var] 
            except KeyError:
                cur = default
            out.write('{0}={1}\n'.format(var,cur))


def read_make_config():
    result = {}
    with open("make.config",'r') as f:
        for line in f.readlines():
          try:
            key, value = line.strip().split('=')
          except:
            print "Error in make.config:"
            print line
            sys.exit(1)
          result[key] = value
    return result


def create_build_ninja():
    
    if "make.config" not in os.listdir(os.getcwd()):
        create_make_config()

    d = read_make_config()

    d["irpf90_files"] = [ "src/{0}".format(x) for x in
        """
        IRPF90_temp/build.ninja irpf90.make irpf90_entities
        tags
        """.split() ] + \
        """
        Python/ezfio.py Ocaml/ezfio.ml Bash/ezfio.sh
        """.split()

    d["irpf90_sources"] = [ "src/{0}".format(x) for x in
        """
        libezfio_error.irp.f create_ocaml.py groups_templates.py
        libezfio_file.irp.f create_python.py libezfio_groups-gen.py
        libezfio_groups.irp.f ezfio-head.py libezfio_util-gen.py
        libezfio_util.irp.f ezfio-tail.py read_config.py run.irp.f
        f_types.py test.py create_bash.py groups.py 
        """.split() ] + [ "make.config" ]

    d["irpf90_files"] = ' '.join(d["irpf90_files"])
    d["irpf90_sources"] = ' '.join(d["irpf90_sources"])
        

    template = """
rule build_archive
   command = git archive --format=tar HEAD > EZFIO.{VERSION}.tar && mkdir -p EZFIO && cd EZFIO && tar -xvf ../EZFIO.{VERSION}.tar && cd .. && rm EZFIO.{VERSION}.tar && tar -zcvf EZFIO.{VERSION}.tar.gz EZFIO && rm -rf EZFIO
   description = Building archive

rule build_make_config
   command = python configure.py
   description = Creating make.config

rule compile_irpf90
   command = cd src ; {IRPF90} --ninja
   description = Compiling IRPF90

rule build_irpf90_a
   command = {NINJA} -C src/IRPF90_temp
   description = Compiling Fortran files

rule build_libezfio_a
   command = cp src/IRPF90_temp/irpf90.a lib/libezfio.a ; {RANLIB} lib/libezfio.a
   description = Building libezfio.a

rule build_libezfio_irp_a
   command = cp lib/libezfio.a lib/libezfio_irp.a ; {AR} dv lib/libezfio_irp.a irp_stack.irp.o ; {RANLIB} lib/libezfio_irp.a
   description = Building libezfio_irp.a



build make.config: build_make_config | configure.py

build {irpf90_files}: compile_irpf90 | {irpf90_sources} 

build src/IRPF90_temp/irpf90.a: build_irpf90_a | {irpf90_files}

build lib/libezfio.a: build_libezfio_a | src/IRPF90_temp/irpf90.a

build lib/libezfio_irp.a: build_libezfio_irp_a | lib/libezfio.a


"""

    with open('generated.ninja','w') as f:
        f.write(template.format(**d))


if __name__ == '__main__':

    create_build_ninja()