"""
Tests of printing functionality
"""

import logging
from io import StringIO
from textwrap import dedent

import numpy as np
import pytest

import pytensor
from pytensor import config
from pytensor.compile.mode import get_mode
from pytensor.compile.ops import deep_copy_op
from pytensor.printing import (
    PatternPrinter,
    PPrinter,
    Print,
    debugprint,
    default_printer,
    get_node_by_id,
    min_informative_str,
    pp,
    pydot_imported,
    pydotprint,
)
from pytensor.tensor import as_tensor_variable
from pytensor.tensor.type import dmatrix, dvector, matrix
from tests.graph.utils import MyInnerGraphOp, MyOp, MyVariable


@pytest.mark.skipif(not pydot_imported, reason="pydot not available")
def test_pydotprint_cond_highlight():
    # This is a REALLY PARTIAL TEST.
    # I did them to help debug stuff.
    x = dvector()
    f = pytensor.function([x], x * 2)
    f([1, 2, 3, 4])

    s = StringIO()
    new_handler = logging.StreamHandler(s)
    new_handler.setLevel(logging.DEBUG)
    orig_handler = pytensor.logging_default_handler

    pytensor.pytensor_logger.removeHandler(orig_handler)
    pytensor.pytensor_logger.addHandler(new_handler)
    try:
        pydotprint(f, cond_highlight=True, print_output_file=False)
    finally:
        pytensor.pytensor_logger.addHandler(orig_handler)
        pytensor.pytensor_logger.removeHandler(new_handler)

    assert (
        s.getvalue() == "pydotprint: cond_highlight is set but there"
        " is no IfElse node in the graph\n"
    )


@pytest.mark.skipif(not pydot_imported, reason="pydot not available")
def test_pydotprint_return_image():
    x = dvector()
    ret = pydotprint(x * 2, return_image=True)
    assert isinstance(ret, (str, bytes))


@pytest.mark.skipif(not pydot_imported, reason="pydot not available")
def test_pydotprint_long_name():
    # This is a REALLY PARTIAL TEST.
    # It prints a graph where there are variable and apply nodes whose long
    # names are different, but not the shortened names.
    # We should not merge those nodes in the dot graph.
    x = dvector()
    mode = pytensor.compile.mode.get_default_mode().excluding("fusion")
    f = pytensor.function([x], [x * 2, x + x], mode=mode)
    f([1, 2, 3, 4])

    pydotprint(f, max_label_size=5, print_output_file=False)
    pydotprint([x * 2, x + x], max_label_size=5, print_output_file=False)


@pytest.mark.skipif(
    not pydot_imported or pytensor.config.mode in ("DebugMode", "DEBUG_MODE"),
    reason="Can't profile in DebugMode",
)
def test_pydotprint_profile():
    A = matrix()
    prof = pytensor.compile.ProfileStats(atexit_print=False, gpu_checks=False)
    f = pytensor.function([A], A + 1, profile=prof)
    pydotprint(f, print_output_file=False)
    f([[1]])
    pydotprint(f, print_output_file=False)


def test_min_informative_str():
    # evaluates a reference output to make sure the
    # min_informative_str function works as intended

    A = matrix(name="A")
    B = matrix(name="B")
    C = A + B
    C.name = "C"
    D = matrix(name="D")
    E = matrix(name="E")

    F = D + E
    G = C + F

    mis = min_informative_str(G).replace("\t", "        ")

    reference = """A. Add
 B. C
 C. Add
  D. D
  E. E"""

    if mis != reference:
        print("--" + mis + "--")
        print("--" + reference + "--")

    assert mis == reference


def test_debugprint():
    with pytest.raises(TypeError):
        debugprint("blah")

    A = dmatrix(name="A")
    B = dmatrix(name="B")
    C = A + B
    C.name = "C"
    D = dmatrix(name="D")
    E = dmatrix(name="E")

    F = D + E
    G = C + F
    mode = pytensor.compile.get_default_mode().including("fusion")
    g = pytensor.function([A, B, D, E], G, mode=mode)

    # just test that it work
    s = StringIO()
    debugprint(G, file=s)

    s = StringIO()
    debugprint(G, file=s, id_type="int")
    s = s.getvalue()
    reference = dedent(
        r"""
        Add [id 0]
         ├─ Add [id 1] 'C'
         │  ├─ A [id 2]
         │  └─ B [id 3]
         └─ Add [id 4]
            ├─ D [id 5]
            └─ E [id 6]
        """
    ).lstrip()

    assert s == reference

    s = StringIO()
    debugprint(G, file=s, id_type="CHAR")
    s = s.getvalue()
    # The additional white space are needed!
    reference = dedent(
        r"""
        Add [id A]
         ├─ Add [id B] 'C'
         │  ├─ A [id C]
         │  └─ B [id D]
         └─ Add [id E]
            ├─ D [id F]
            └─ E [id G]
        """
    ).lstrip()

    assert s == reference

    s = StringIO()
    debugprint(G, file=s, id_type="CHAR", stop_on_name=True)
    s = s.getvalue()
    # The additional white space are needed!
    reference = dedent(
        r"""
        Add [id A]
         ├─ Add [id B] 'C'
         │  └─ ···
         └─ Add [id C]
            ├─ D [id D]
            └─ E [id E]
        """
    ).lstrip()

    assert s == reference

    s = StringIO()
    debugprint(G, file=s, id_type="")
    s = s.getvalue()
    reference = dedent(
        r"""
        Add
         ├─ Add 'C'
         │  ├─ A
         │  └─ B
         └─ Add
            ├─ D
            └─ E
        """
    ).lstrip()

    assert s == reference

    s = StringIO()
    debugprint(g, file=s, id_type="", print_storage=True)
    s = s.getvalue()
    reference = dedent(
        r"""
        Add 0 [None]
         ├─ A [None]
         ├─ B [None]
         ├─ D [None]
         └─ E [None]
        """
    ).lstrip()

    assert s == reference

    # Test the `profile` handling when profile data is missing
    g = pytensor.function([A, B, D, E], G, mode=mode, profile=True)

    s = StringIO()
    debugprint(g, file=s, id_type="", print_storage=True)
    s = s.getvalue()
    reference = dedent(
        r"""
        Add 0 [None]
         ├─ A [None]
         ├─ B [None]
         ├─ D [None]
         └─ E [None]
        """
    ).lstrip()

    assert s == reference

    # Add profile data
    g(np.c_[[1.0]], np.c_[[1.0]], np.c_[[1.0]], np.c_[[1.0]])

    s = StringIO()
    debugprint(g, file=s, id_type="", print_storage=True)
    s = s.getvalue()
    reference = dedent(
        r"""
        Add 0 [None]
         ├─ A [None]
         ├─ B [None]
         ├─ D [None]
         └─ E [None]
        """
    ).lstrip()

    assert reference in s

    A = dmatrix(name="A")
    B = dmatrix(name="B")
    D = dmatrix(name="D")
    J = dvector()
    s = StringIO()
    debugprint(
        pytensor.function([A, B, D, J], A + (B.dot(J) - D), mode="FAST_RUN"),
        file=s,
        id_type="",
        print_destroy_map=True,
        print_view_map=True,
    )
    s = s.getvalue()
    Gemv_op_name = "CGemv" if pytensor.config.blas__ldflags else "Gemv"
    exp_res = dedent(
        r"""
        Composite{(i2 + (i0 - i1))} 4
        ├─ ExpandDims{axis=0} v={0: [0]} 3
        """
        f"        │  └─ {Gemv_op_name}{{inplace}} d={{0: [0]}} 2"
        r"""
        │     ├─ AllocEmpty{dtype='float64'} 1
        │     │  └─ Shape_i{0} 0
        │     │     └─ B
        │     ├─ 1.0
        │     ├─ B
        │     ├─ <Vector(float64, shape=(?,))>
        │     └─ 0.0
        ├─ D
        └─ A

        Inner graphs:

        Composite{(i2 + (i0 - i1))}
        ← add 'o0'
            ├─ i2
            └─ sub
            ├─ i0
            └─ i1
        """
    ).lstrip()

    assert [l.strip() for l in s.split("\n")] == [
        l.strip() for l in exp_res.split("\n")
    ]


def test_debugprint_id_type():
    a_at = dvector()
    b_at = dmatrix()

    d_at = b_at.dot(a_at)
    e_at = d_at + a_at

    s = StringIO()
    debugprint(e_at, id_type="auto", file=s)
    s = s.getvalue()

    exp_res = f"""Add [id {e_at.auto_name}]
 ├─ dot [id {d_at.auto_name}]
 │  ├─ <Matrix(float64, shape=(?, ?))> [id {b_at.auto_name}]
 │  └─ <Vector(float64, shape=(?,))> [id {a_at.auto_name}]
 └─ <Vector(float64, shape=(?,))> [id {a_at.auto_name}]
    """

    assert [l.strip() for l in s.split("\n")] == [
        l.strip() for l in exp_res.split("\n")
    ]


def test_pprint():
    x = dvector()
    y = x[1]
    assert pp(y) == "<Vector(float64, shape=(?,))>[1]"


def test_debugprint_inner_graph():
    r1, r2 = MyVariable("1"), MyVariable("2")
    o1 = MyOp("op1")(r1, r2)
    o1.name = "o1"

    # Inner graph
    igo_in_1 = MyVariable("4")
    igo_in_2 = MyVariable("5")
    igo_out_1 = MyOp("op2")(igo_in_1, igo_in_2)
    igo_out_1.name = "igo1"

    igo = MyInnerGraphOp([igo_in_1, igo_in_2], [igo_out_1])

    r3, r4 = MyVariable("3"), MyVariable("4")
    out = igo(r3, r4)

    output_str = debugprint(out, file="str")
    lines = output_str.split("\n")

    exp_res = """MyInnerGraphOp [id A]
 ├─ 3 [id B]
 └─ 4 [id C]

Inner graphs:

MyInnerGraphOp [id A]
 ← op2 [id D] 'igo1'
    ├─ *0-<MyType()> [id E]
    └─ *1-<MyType()> [id F]
    """

    for exp_line, res_line in zip(exp_res.split("\n"), lines):
        assert exp_line.strip() == res_line.strip()

    # Test nested inner-graph `Op`s
    igo_2 = MyInnerGraphOp([r3, r4], [out])

    r5 = MyVariable("5")
    out_2 = igo_2(r5)

    output_str = debugprint(out_2, file="str")
    lines = output_str.split("\n")

    exp_res = """MyInnerGraphOp [id A]
 └─ 5 [id B]

Inner graphs:

MyInnerGraphOp [id A]
 ← MyInnerGraphOp [id C]
    ├─ *0-<MyType()> [id D]
    └─ *1-<MyType()> [id E]

MyInnerGraphOp [id C]
 ← op2 [id F] 'igo1'
    ├─ *0-<MyType()> [id D]
    └─ *1-<MyType()> [id E]
    """

    for exp_line, res_line in zip(exp_res.split("\n"), lines):
        assert exp_line.strip() == res_line.strip()


def test_get_var_by_id():
    r1, r2 = MyVariable("v1"), MyVariable("v2")
    o1 = MyOp("op1")(r1, r2)
    o1.name = "o1"

    igo_in_1 = MyVariable("v4")
    igo_in_2 = MyVariable("v5")
    igo_out_1 = MyOp("op2")(igo_in_1, igo_in_2)
    igo_out_1.name = "igo1"

    igo = MyInnerGraphOp([igo_in_1, igo_in_2], [igo_out_1])

    r3 = MyVariable("v3")
    o2 = igo(r3, o1)

    res = get_node_by_id(o1, "blah")

    assert res is None

    res = get_node_by_id([o1, o2], "C")

    assert res == r2

    res = get_node_by_id([o1, o2], "F")

    exp_res = igo.fgraph.outputs[0].owner
    assert res == exp_res


def test_PatternPrinter():
    r1, r2 = MyVariable("1"), MyVariable("2")
    op1 = MyOp("op1")
    o1 = op1(r1, r2)
    o1.name = "o1"

    pprint = PPrinter()
    pprint.assign(op1, PatternPrinter(("|%(0)s - %(1)s|", -1000)))
    pprint.assign(lambda pstate, r: True, default_printer)

    res = pprint(o1)

    assert res == "|1 - 2|"


def test_Print(capsys):
    r"""Make sure that `Print` `Op`\s are present in compiled graphs with constant folding."""
    x = as_tensor_variable(1.0) * as_tensor_variable(3.0)
    print_op = Print("hello")
    x_print = print_op(x)

    # Just to be more sure that we'll have constant folding...
    mode = get_mode("FAST_RUN").including("topo_constant_folding")

    fn = pytensor.function([], x_print, mode=mode)

    nodes = fn.maker.fgraph.toposort()
    assert len(nodes) == 2
    assert nodes[0].op == print_op
    assert nodes[1].op == deep_copy_op

    fn()

    stdout, stderr = capsys.readouterr()
    assert "hello" in stdout


def test_summary_with_profile_optimizer():
    with config.change_flags(profile_optimizer=True):
        f = pytensor.function(inputs=[], outputs=[], profile=True)

    s = StringIO()
    f.profile.summary(file=s)
    assert "Rewriter Profile" in s.getvalue()
