"""List primitive ops."""

from __future__ import annotations

from mypyc.ir.ops import ERR_FALSE, ERR_MAGIC, ERR_NEVER
from mypyc.ir.rtypes import (
    bit_rprimitive,
    c_int_rprimitive,
    c_pyssize_t_rprimitive,
    int64_rprimitive,
    int_rprimitive,
    list_rprimitive,
    object_rprimitive,
    pointer_rprimitive,
    short_int_rprimitive,
)
from mypyc.primitives.registry import (
    ERR_NEG_INT,
    binary_op,
    custom_op,
    custom_primitive_op,
    function_op,
    load_address_op,
    method_op,
)

# Get the 'builtins.list' type object.
load_address_op(name="builtins.list", type=object_rprimitive, src="PyList_Type")

# list(obj)
to_list = function_op(
    name="builtins.list",
    arg_types=[object_rprimitive],
    return_type=list_rprimitive,
    c_function_name="PySequence_List",
    error_kind=ERR_MAGIC,
)

# Construct an empty list via list().
function_op(
    name="builtins.list",
    arg_types=[],
    return_type=list_rprimitive,
    c_function_name="PyList_New",
    error_kind=ERR_MAGIC,
    extra_int_constants=[(0, int_rprimitive)],
)

new_list_op = custom_op(
    arg_types=[c_pyssize_t_rprimitive],
    return_type=list_rprimitive,
    c_function_name="PyList_New",
    error_kind=ERR_MAGIC,
)

list_build_op = custom_op(
    arg_types=[c_pyssize_t_rprimitive],
    return_type=list_rprimitive,
    c_function_name="CPyList_Build",
    error_kind=ERR_MAGIC,
    var_arg_type=object_rprimitive,
    steals=True,
)

# Get pointer to list items (ob_item PyListObject field)
list_items = custom_primitive_op(
    name="list_items",
    arg_types=[list_rprimitive],
    return_type=pointer_rprimitive,
    error_kind=ERR_NEVER,
)

# list[index] (for an integer index)
list_get_item_op = method_op(
    name="__getitem__",
    arg_types=[list_rprimitive, int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItem",
    error_kind=ERR_MAGIC,
)

# list[index] version with no int tag check for when it is known to be short
method_op(
    name="__getitem__",
    arg_types=[list_rprimitive, short_int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItemShort",
    error_kind=ERR_MAGIC,
    priority=2,
)

# list[index] that produces a borrowed result
method_op(
    name="__getitem__",
    arg_types=[list_rprimitive, int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItemBorrow",
    error_kind=ERR_MAGIC,
    is_borrowed=True,
    priority=3,
)

# list[index] that produces a borrowed result and index is known to be short
method_op(
    name="__getitem__",
    arg_types=[list_rprimitive, short_int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItemShortBorrow",
    error_kind=ERR_MAGIC,
    is_borrowed=True,
    priority=4,
)

# Version with native int index
method_op(
    name="__getitem__",
    arg_types=[list_rprimitive, int64_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItemInt64",
    error_kind=ERR_MAGIC,
    priority=5,
)

# Version with native int index
method_op(
    name="__getitem__",
    arg_types=[list_rprimitive, int64_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItemInt64Borrow",
    is_borrowed=True,
    error_kind=ERR_MAGIC,
    priority=6,
)

# This is unsafe because it assumes that the index is a non-negative short integer
# that is in-bounds for the list.
list_get_item_unsafe_op = custom_op(
    arg_types=[list_rprimitive, short_int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetItemUnsafe",
    error_kind=ERR_NEVER,
)

# list[index] = obj
list_set_item_op = method_op(
    name="__setitem__",
    arg_types=[list_rprimitive, int_rprimitive, object_rprimitive],
    return_type=bit_rprimitive,
    c_function_name="CPyList_SetItem",
    error_kind=ERR_FALSE,
    steals=[False, False, True],
)

# list[index_i64] = obj
method_op(
    name="__setitem__",
    arg_types=[list_rprimitive, int64_rprimitive, object_rprimitive],
    return_type=bit_rprimitive,
    c_function_name="CPyList_SetItemInt64",
    error_kind=ERR_FALSE,
    steals=[False, False, True],
    priority=2,
)

# PyList_SET_ITEM does no error checking,
# and should only be used to fill in brand new lists.
new_list_set_item_op = custom_op(
    arg_types=[list_rprimitive, int_rprimitive, object_rprimitive],
    return_type=bit_rprimitive,
    c_function_name="CPyList_SetItemUnsafe",
    error_kind=ERR_FALSE,
    steals=[False, False, True],
)

# list.append(obj)
list_append_op = method_op(
    name="append",
    arg_types=[list_rprimitive, object_rprimitive],
    return_type=c_int_rprimitive,
    c_function_name="PyList_Append",
    error_kind=ERR_NEG_INT,
)

# list.extend(obj)
list_extend_op = method_op(
    name="extend",
    arg_types=[list_rprimitive, object_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_Extend",
    error_kind=ERR_MAGIC,
)

# list.pop()
list_pop_last = method_op(
    name="pop",
    arg_types=[list_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_PopLast",
    error_kind=ERR_MAGIC,
)

# list.pop(index)
list_pop = method_op(
    name="pop",
    arg_types=[list_rprimitive, int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_Pop",
    error_kind=ERR_MAGIC,
)

# list.count(obj)
method_op(
    name="count",
    arg_types=[list_rprimitive, object_rprimitive],
    return_type=short_int_rprimitive,
    c_function_name="CPyList_Count",
    error_kind=ERR_MAGIC,
)

# list.insert(index, obj)
method_op(
    name="insert",
    arg_types=[list_rprimitive, int_rprimitive, object_rprimitive],
    return_type=c_int_rprimitive,
    c_function_name="CPyList_Insert",
    error_kind=ERR_NEG_INT,
)

# list.sort()
method_op(
    name="sort",
    arg_types=[list_rprimitive],
    return_type=c_int_rprimitive,
    c_function_name="PyList_Sort",
    error_kind=ERR_NEG_INT,
)

# list.reverse()
method_op(
    name="reverse",
    arg_types=[list_rprimitive],
    return_type=c_int_rprimitive,
    c_function_name="PyList_Reverse",
    error_kind=ERR_NEG_INT,
)

# list.remove(obj)
method_op(
    name="remove",
    arg_types=[list_rprimitive, object_rprimitive],
    return_type=c_int_rprimitive,
    c_function_name="CPyList_Remove",
    error_kind=ERR_NEG_INT,
)

# list.index(obj)
method_op(
    name="index",
    arg_types=[list_rprimitive, object_rprimitive],
    return_type=int_rprimitive,
    c_function_name="CPyList_Index",
    error_kind=ERR_MAGIC,
)

# list * int
binary_op(
    name="*",
    arg_types=[list_rprimitive, int_rprimitive],
    return_type=list_rprimitive,
    c_function_name="CPySequence_Multiply",
    error_kind=ERR_MAGIC,
)

# int * list
binary_op(
    name="*",
    arg_types=[int_rprimitive, list_rprimitive],
    return_type=list_rprimitive,
    c_function_name="CPySequence_RMultiply",
    error_kind=ERR_MAGIC,
)

# list[begin:end]
list_slice_op = custom_op(
    arg_types=[list_rprimitive, int_rprimitive, int_rprimitive],
    return_type=object_rprimitive,
    c_function_name="CPyList_GetSlice",
    error_kind=ERR_MAGIC,
)

supports_sequence_protocol = custom_op(
    arg_types=[object_rprimitive],
    return_type=c_int_rprimitive,
    c_function_name="CPySequence_Check",
    error_kind=ERR_NEVER,
)

sequence_get_item = custom_op(
    arg_types=[object_rprimitive, c_pyssize_t_rprimitive],
    return_type=object_rprimitive,
    c_function_name="PySequence_GetItem",
    error_kind=ERR_NEVER,
)

sequence_get_slice = custom_op(
    arg_types=[object_rprimitive, c_pyssize_t_rprimitive, c_pyssize_t_rprimitive],
    return_type=object_rprimitive,
    c_function_name="PySequence_GetSlice",
    error_kind=ERR_MAGIC,
)
