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use std
use regex
use thread

use "build"
use "config"
use "deps"
use "install"
use "opts"
use "parse"
use "test"
use "types"
use "util"
use "syssel"

const main = {args : byte[:][:]
	var b : bld.build#
	var targname
	var runsrc
	var path
	var tmp
	var cmd 
	var tags
	var pid
	var ok, r

	cmd = std.optparse(args, &[
		.argdesc = "[inputs...]",
		.opts = [
			[.opt='j', .arg="jobs", .desc="build with at most 'jobs' jobs"],
			[.opt='t', .arg="tag", .desc="build with specified systag"],
			[.opt='T', .arg="tag", .desc="build with only the specified systag"],
			[.opt='S', .desc="generate assembly when building"],
			[.opt='I', .arg="inc", .desc="add 'inc' to your include path"],
			[.opt='R', .arg="runsrc", .desc="source to compile and run"],
			[.opt='B', .arg="base", .desc="install into 'base'"],
			[.opt='b', .arg="bin", .desc="compile binary 'bin' from inputs"],
			[.opt='r', .arg="rt", .desc="link against runtime 'rt'"],
			[.opt='o', .arg="dir", .desc="output directory"],
			[.opt='v', .desc="increase build verbosity"],
		][:]
	])

	tags = [][:]
	runsrc = ""
	targname = ""
	ok = true

	bld.initopts()
	for opt : cmd.opts
		match opt
		| ('S', ""):	bld.opt_genasm = true
		| ('I', arg):	std.slpush(&bld.opt_incpaths, arg)
		| ('B', arg):	bld.opt_instbase = arg
		| ('t', tag):	std.slpush(&tags, tag)
		| ('T', tag):	std.slpush(&bld.opt_alltags, tag)
		| ('j', arg):	bld.opt_maxproc = std.getv(std.intparse(arg), 1)
		| ('R', arg):	runsrc = arg
		| ('o', arg):	bld.opt_objdir = arg
		| ('b', arg):	targname = arg
		| ('r', arg):	bld.opt_runtime = arg
		| ('v', _):	bld.opt_verbosity++
		| _:		std.die("unreachable\n")
		;;
	;;
	path = std.pathcat(bld.opt_instbase, config.Libpath)
	std.slpush(&bld.opt_incpaths, path)

	for (e, v) : config.Env
		std.setenv(e, v)
	;;

	b = mkbuild(tags)
	if targname.len != 0
		ok = buildimm(b, targname, cmd.args)
	elif runsrc.len != 0
		bld.opt_verbosity = -1
		tmp = std.mktemppath("runmyr")
		ok = buildimm(b, tmp, [runsrc][:])
		if ok
			pid = runcmd(tmp, cmd.args)
			match std.wait(pid)
			| `std.Wsuccess:	ok = true
			| _:			ok = false
			;;
		;;
		std.remove(tmp)
	else
		findproj(b)
		bld.load(b)
		bld.deps(b)
		bld.testdeps(b)
		bld.resolve(b)
		/* default: buildall */
		if cmd.args.len == 0
			ok = bld.buildtarg(b, "all")
		else
			match cmd.args[0]
			| "clean":	r = bld.clean(b)
			| "install":	r = bld.install(b)
			| "uninstall":	r = bld.uninstall(b)
			| "test":	r = bld.test(b, cmd.args[1:])
			| "bench":	r = bld.bench(b, cmd.args[1:])
			| "list":	r = show(b, cmd.args[1:])
			| _:
				ok = true
				for target : cmd.args
					r = ok && bld.buildtarg(b, target)
				;;
			;;
		;;
	;;
	if !ok
		std.exit(1)
	;;
}

const buildimm = {b, targ, inputs
	var mt : bld.myrtarg

	mt = [
		.name=targ,
		.inputs=inputs,
		.runtime=bld.opt_runtime,
		.incpath=bld.opt_incpaths,
		.libdeps=[][:]
	]
	bld.opt_objdir = ""
	std.slpush(&b.all, "__out__")
	std.htput(b.targs, "__out__", `bld.Bin &mt)
	bld.deps(b)
	bld.resolve(b)
	-> bld.buildtarg(b, "all")
}

const runcmd = {bin, args
	var sl

	sl = std.sldup([bin][:])
	-> bld.run(std.sljoin(&sl, args), "")
}

const mkbuild = {tags
	var b

	b = std.zalloc()
	b.libs = std.mkht()
	b.proc = std.mkht()
	b.targs = std.mkht()
	b.tags = std.mkht()
	b.deps = std.mk([
		.targs = std.mkht(),
		.gen = std.mkht(),
		.leaves = [][:],
		.nodes = [][:],
	])
	b.tctime = tctime()
	bld.addsysattrs(b, tags)
	-> b
}

const tctime = {
	var path : byte[1024]
	var tm

	tm = 0
	for bin : [bld.opt_muse, bld.opt_mc][:]
		match which(path[:], bin)
		| `std.None:
		| `std.Some p:
			match std.fmtime(p)
			| `std.Ok t:	tm = std.max(tm, t)
			| `std.Err e:	tm = std.now()
			;;
		;;
	;;
	-> tm
}

const which = {buf, name
	var path, f

	path = std.getenvv("PATH", "/bin")
	for p : std.bysplit(path, ":")
		f = std.bfmt(buf, "{}/{}", p, name)
		if std.fexists(f)
			-> `std.Some f
		;;
	;;
	-> `std.None
}


const findproj = {b
	var dir

	dir = std.getcwd()
	while dir.len > 0 && !std.eq(dir, "/")
		if std.chdir(dir) && std.fexists("bld.proj")
			b.basedir = dir
			break
		;;
		dir = std.dirname(dir)
	;;
	if dir.len > 0 && std.eq(b.basedir, "/")
		std.fatal("could not find bld.proj\n")
	;;
}

const show = {b, targs
	var k
	
	k = std.htkeys(b.targs)
	std.put("{j=\n}\n", k)
	std.slfree(k)
	-> true
}