package rosa

import (
	"slices"
	"strconv"
	"strings"

	"hakurei.app/internal/pkg"
)

// skipGNUTests generates a string for skipping specific tests by number in a
// GNU test suite. This is nontrivial because the test suite does not support
// excluding tests in any way, so ranges for all but the skipped tests have to
// be specified instead.
//
// For example, to skip test 764, ranges around the skipped test must be
// specified:
//
//	1-763 765-
//
// Tests are numbered starting from 1. The resulting string is unquoted.
func skipGNUTests(tests ...int) string {
	tests = slices.Clone(tests)
	slices.Sort(tests)

	var buf strings.Builder

	if tests[0] != 1 {
		buf.WriteString("1-")
	}

	for i, n := range tests {
		if n != 1 && (i == 0 || tests[i-1] != n-1) {
			buf.WriteString(strconv.Itoa(n - 1))
			buf.WriteString(" ")
		}
		if i == len(tests)-1 || tests[i+1] != n+1 {
			buf.WriteString(strconv.Itoa(n + 1))
			buf.WriteString("-")
		}
	}
	return buf.String()
}

func (t Toolchain) newBison() (pkg.Artifact, string) {
	const (
		version  = "3.8.2"
		checksum = "BhRM6K7URj1LNOkIDCFDctSErLS-Xo5d9ba9seg10o6ACrgC1uNhED7CQPgIY29Y"
	)
	return t.NewPackage("bison", version, newTar(
		"https://ftpmirror.gnu.org/gnu/bison/bison-"+version+".tar.gz",
		checksum,
		pkg.TarGzip,
	), nil, &MakeHelper{
		Check: []string{
			"TESTSUITEFLAGS=" + jobsFlagE + "' " + skipGNUTests(
				// clang miscompiles (SIGILL)
				764,
			) + "'",
			"check",
		},
	},
		M4,
		Diffutils,
		Sed,
	), version
}
func init() {
	native.MustRegister(&Artifact{
		f: Toolchain.newBison,

		Name:        "bison",
		Description: "a general-purpose parser generator",
		Website:     "https://www.gnu.org/software/bison/",

		ID: 193,
	})
}

func (t Toolchain) newBinutils() (pkg.Artifact, string) {
	const (
		version  = "2.46.0"
		checksum = "4kK1_EXQipxSqqyvwD4LbiMLFKCUApjq6PeG4XJP4dzxYGqDeqXfh8zLuTyOuOVR"
	)
	return t.NewPackage("binutils", version, newTar(
		"https://ftpmirror.gnu.org/gnu/binutils/binutils-"+version+".tar.bz2",
		checksum,
		pkg.TarBzip2,
	), nil, (*MakeHelper)(nil),
		Bash,
	), version
}
func init() {
	native.MustRegister(&Artifact{
		f: Toolchain.newBinutils,

		Name:        "binutils",
		Description: "a collection of binary tools",
		Website:     "https://www.gnu.org/software/binutils/",

		ID: 7981,
	})
}

func (t Toolchain) newGCC() (pkg.Artifact, string) {
	const (
		version  = "16.1.0"
		checksum = "4ASoWbxaA2FW7PAB0zzHDPC5XnNhyaAyjtDPpGzceSLeYnEIXsNYZR3PA_Zu5P0K"
	)

	var configureExtra []KV
	switch t.arch {
	case "amd64", "arm64":
		configureExtra = append(configureExtra, KV{"with-multilib-list", "''"})
	}

	return t.NewPackage("gcc", version, newTar(
		"https://ftp.tsukuba.wide.ad.jp/software/gcc/releases/"+
			"gcc-"+version+"/gcc-"+version+".tar.gz",
		checksum,
		pkg.TarGzip,
	), &PackageAttr{
		Patches: []KV{
			{"musl-off64_t-loff_t", `diff --git a/libgo/sysinfo.c b/libgo/sysinfo.c
index 180f5c31d74..44d7ea73f7d 100644
--- a/libgo/sysinfo.c
+++ b/libgo/sysinfo.c
@@ -365,11 +365,7 @@ enum {
 typedef loff_t libgo_loff_t_type;
 #endif

-#if defined(HAVE_OFF64_T)
-typedef off64_t libgo_off_t_type;
-#else
 typedef off_t libgo_off_t_type;
-#endif

 // The following section introduces explicit references to types and
 // constants of interest to support bootstrapping libgo using a
`},

			{"musl-legacy-lfs", `diff --git a/libgo/go/internal/syscall/unix/at_largefile.go b/libgo/go/internal/syscall/unix/at_largefile.go
index 82e0dcfd074..16151ecad1b 100644
--- a/libgo/go/internal/syscall/unix/at_largefile.go
+++ b/libgo/go/internal/syscall/unix/at_largefile.go
@@ -10,5 +10,5 @@ import (
 	"syscall"
 )

-//extern fstatat64
+//extern fstatat
 func fstatat(int32, *byte, *syscall.Stat_t, int32) int32
diff --git a/libgo/go/os/dir_largefile.go b/libgo/go/os/dir_largefile.go
index 1fc5ee0771f..0c6dffe1a75 100644
--- a/libgo/go/os/dir_largefile.go
+++ b/libgo/go/os/dir_largefile.go
@@ -11,5 +11,5 @@ package os

 import "syscall"

-//extern readdir64
+//extern readdir
 func libc_readdir(*syscall.DIR) *syscall.Dirent
diff --git a/libgo/go/syscall/libcall_glibc.go b/libgo/go/syscall/libcall_glibc.go
index 5c1ec483c75..5a1245ed44b 100644
--- a/libgo/go/syscall/libcall_glibc.go
+++ b/libgo/go/syscall/libcall_glibc.go
@@ -114,7 +114,7 @@ func Pipe2(p []int, flags int) (err error) {
 }

 //sys	sendfile(outfd int, infd int, offset *Offset_t, count int) (written int, err error)
-//sendfile64(outfd _C_int, infd _C_int, offset *Offset_t, count Size_t) Ssize_t
+//sendfile(outfd _C_int, infd _C_int, offset *Offset_t, count Size_t) Ssize_t

 func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
 	if race.Enabled {
diff --git a/libgo/go/syscall/libcall_linux.go b/libgo/go/syscall/libcall_linux.go
index 03ca7261b59..ad21fd0b3ac 100644
--- a/libgo/go/syscall/libcall_linux.go
+++ b/libgo/go/syscall/libcall_linux.go
@@ -158,7 +158,7 @@ func Reboot(cmd int) (err error) {
 //adjtimex(buf *Timex) _C_int

 //sys	Fstatfs(fd int, buf *Statfs_t) (err error)
-//fstatfs64(fd _C_int, buf *Statfs_t) _C_int
+//fstatfs(fd _C_int, buf *Statfs_t) _C_int

 func Gettid() (tid int) {
 	r1, _, _ := Syscall(SYS_GETTID, 0, 0, 0)
@@ -245,7 +245,7 @@ func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n i
 }

 //sys	Statfs(path string, buf *Statfs_t) (err error)
-//statfs64(path *byte, buf *Statfs_t) _C_int
+//statfs(path *byte, buf *Statfs_t) _C_int

 //sysnb	Sysinfo(info *Sysinfo_t) (err error)
 //sysinfo(info *Sysinfo_t) _C_int
diff --git a/libgo/go/syscall/libcall_posix_largefile.go b/libgo/go/syscall/libcall_posix_largefile.go
index f90055bb29a..334212f0af1 100644
--- a/libgo/go/syscall/libcall_posix_largefile.go
+++ b/libgo/go/syscall/libcall_posix_largefile.go
@@ -10,40 +10,40 @@
 package syscall

 //sys	Creat(path string, mode uint32) (fd int, err error)
-//creat64(path *byte, mode Mode_t) _C_int
+//creat(path *byte, mode Mode_t) _C_int

 //sys	Fstat(fd int, stat *Stat_t) (err error)
-//fstat64(fd _C_int, stat *Stat_t) _C_int
+//fstat(fd _C_int, stat *Stat_t) _C_int

 //sys	Ftruncate(fd int, length int64) (err error)
-//ftruncate64(fd _C_int, length Offset_t) _C_int
+//ftruncate(fd _C_int, length Offset_t) _C_int

 //sysnb	Getrlimit(resource int, rlim *Rlimit) (err error)
-//getrlimit64(resource _C_int, rlim *Rlimit) _C_int
+//getrlimit(resource _C_int, rlim *Rlimit) _C_int

 //sys	Lstat(path string, stat *Stat_t) (err error)
-//lstat64(path *byte, stat *Stat_t) _C_int
+//lstat(path *byte, stat *Stat_t) _C_int

 //sys	mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error)
-//mmap64(addr *byte, length Size_t, prot _C_int, flags _C_int, fd _C_int, offset Offset_t) *byte
+//mmap(addr *byte, length Size_t, prot _C_int, flags _C_int, fd _C_int, offset Offset_t) *byte

 //sys	Open(path string, mode int, perm uint32) (fd int, err error)
-//__go_open64(path *byte, mode _C_int, perm Mode_t) _C_int
+//__go_open(path *byte, mode _C_int, perm Mode_t) _C_int

 //sys	Pread(fd int, p []byte, offset int64) (n int, err error)
-//pread64(fd _C_int, buf *byte, count Size_t, offset Offset_t) Ssize_t
+//pread(fd _C_int, buf *byte, count Size_t, offset Offset_t) Ssize_t

 //sys	Pwrite(fd int, p []byte, offset int64) (n int, err error)
-//pwrite64(fd _C_int, buf *byte, count Size_t, offset Offset_t) Ssize_t
+//pwrite(fd _C_int, buf *byte, count Size_t, offset Offset_t) Ssize_t

 //sys	Seek(fd int, offset int64, whence int) (off int64, err error)
-//lseek64(fd _C_int, offset Offset_t, whence _C_int) Offset_t
+//lseek(fd _C_int, offset Offset_t, whence _C_int) Offset_t

 //sysnb	Setrlimit(resource int, rlim *Rlimit) (err error)
-//setrlimit64(resource int, rlim *Rlimit) _C_int
+//setrlimit(resource int, rlim *Rlimit) _C_int

 //sys	Stat(path string, stat *Stat_t) (err error)
-//stat64(path *byte, stat *Stat_t) _C_int
+//stat(path *byte, stat *Stat_t) _C_int

 //sys	Truncate(path string, length int64) (err error)
-//truncate64(path *byte, length Offset_t) _C_int
+//truncate(path *byte, length Offset_t) _C_int
diff --git a/libgo/runtime/go-varargs.c b/libgo/runtime/go-varargs.c
index f84860891e6..7efc9615985 100644
--- a/libgo/runtime/go-varargs.c
+++ b/libgo/runtime/go-varargs.c
@@ -84,7 +84,7 @@ __go_ioctl_ptr (int d, int request, void *arg)
 int
 __go_open64 (char *path, int mode, mode_t perm)
 {
-  return open64 (path, mode, perm);
+  return open (path, mode, perm);
 }

 #endif
`},
		},

		ScriptEarly: `
ln -s system/lib /
ln -s system/lib /work/
`,

		// GCC spends most of its time in its many configure scripts, however
		// it also saturates the CPU for a consequential amount of time.
		Flag: TExclusive,
	}, &MakeHelper{
		Configure: append([]KV{
			{"disable-multilib"},
			{"enable-default-pie"},
			{"disable-nls"},
			{"with-gnu-as"},
			{"with-gnu-ld"},
			{"with-system-zlib"},
			{"enable-languages", "c,c++,go"},
			{"with-native-system-header-dir", "/system/include"},
		}, configureExtra...),
		Make: []string{
			"BOOT_CFLAGS='-O2 -g'",
			"bootstrap",
		},

		// This toolchain is hacked to pieces, it is not expected to ever work
		// well in its current state. That does not matter as long as the
		// toolchain it produces passes its own test suite.
		SkipCheck: true,
	},
		Binutils,

		MPC,
		Zlib,
		Libucontext,
		KernelHeaders,
	), version
}
func init() {
	native.MustRegister(&Artifact{
		f: Toolchain.newGCC,

		Name:        "gcc",
		Description: "The GNU Compiler Collection",
		Website:     "https://www.gnu.org/software/gcc/",

		Dependencies: P{
			Binutils,

			MPC,
			Zlib,
			Libucontext,
		},

		ID: 6502,
	})
}