import tests
from pwndbg.commands.nearpc import emulate
from pwndbg.commands.nearpc import nearpc
from pwndbg.commands.nearpc import pdisass
from pwndbg.commands.windbg import u

EMULATE_DISASM_BINARY = tests.binaries.get('emulate_disasm.out')
EMULATE_DISASM_LOOP_BINARY = tests.binaries.get('emulate_disasm_loop.out')


def test_emulate_disasm(start_binary):
    """
    Tests emulate command and its caching behavior
    """
    start_binary(EMULATE_DISASM_BINARY)

    disasm_with_emu_0x400080 = [
        ' ► 0x400080 <_start>    jmp    label                      <label>',
        '    ↓',
        '   0x400083 <label>     nop    ',
        '   0x400084             add    byte ptr [rax], al',
        '   0x400086             add    byte ptr [rax], al',
        '   0x400088             add    byte ptr [rax], al',
        '   0x40008a             add    byte ptr [rax], al',
        '   0x40008c             add    byte ptr [rax], al',
        '   0x40008e             add    byte ptr [rax], al',
        '   0x400090             add    byte ptr [rax], al',
        '   0x400092             add    byte ptr [rax], al',
        '   0x400094             add    byte ptr [rax], al'
    ]

    disasm_without_emu_0x400080 = [
        ' ► 0x400080 <_start>      jmp    label                      <label>',
        ' ',
        '   0x400082 <_start+2>    nop    ',
        '   0x400083 <label>       nop    ',
        '   0x400084               add    byte ptr [rax], al',
        '   0x400086               add    byte ptr [rax], al',
        '   0x400088               add    byte ptr [rax], al',
        '   0x40008a               add    byte ptr [rax], al',
        '   0x40008c               add    byte ptr [rax], al',
        '   0x40008e               add    byte ptr [rax], al',
        '   0x400090               add    byte ptr [rax], al',
        '   0x400092               add    byte ptr [rax], al'
    ]

    compare_output_emu(disasm_with_emu_0x400080)
    compare_output_without_emu(disasm_without_emu_0x400080)


def test_emulate_disasm_loop(start_binary):
    start_binary(EMULATE_DISASM_LOOP_BINARY)

    disasm_with_emu_0x400080 = [
        ' ► 0x400080 <_start>       movabs rsi, string                   <0x400094>',
        '   0x40008a <_start+10>    mov    rdi, rsp',
        '   0x40008d <_start+13>    mov    ecx, 3',
        '   0x400092 <_start+18>    rep movsb byte ptr [rdi], byte ptr [rsi]',
        '    ↓',
        '   0x400092 <_start+18>    rep movsb byte ptr [rdi], byte ptr [rsi]',
        '    ↓',
        '   0x400092 <_start+18>    rep movsb byte ptr [rdi], byte ptr [rsi]',
        '    ↓',
        '   0x400092 <_start+18>    rep movsb byte ptr [rdi], byte ptr [rsi]',
        '   0x400094 <string>       xor    dword ptr [rdx], esi',
        '   0x400096 <string+2>     xor    esi, dword ptr [rsi]',
        '   0x40009d                add    byte ptr [rax], al',
        '   0x40009f                add    byte ptr [rax], al',
    ]

    disasm_without_emu_0x400080 = [
        ' ► 0x400080 <_start>       movabs rsi, string                   <0x400094>',
        '   0x40008a <_start+10>    mov    rdi, rsp',
        '   0x40008d <_start+13>    mov    ecx, 3',
        '   0x400092 <_start+18>    rep movsb byte ptr [rdi], byte ptr [rsi]',
        '   0x400094 <string>       xor    dword ptr [rdx], esi',
        '   0x400096 <string+2>     xor    esi, dword ptr [rsi]',
        '   0x40009d                add    byte ptr [rax], al',
        '   0x40009f                add    byte ptr [rax], al',
        '   0x4000a1                add    byte ptr [rax], al',
        '   0x4000a3                add    byte ptr [rax], al',
        '   0x4000a5                add    byte ptr [rax], al',
    ]

    compare_output_emu(disasm_with_emu_0x400080)
    compare_output_without_emu(disasm_without_emu_0x400080)


def compare_output_emu(emu_0x400080):
    assert emulate(to_string=True) == emu_0x400080


def compare_output_without_emu(emu_0x400080):
    assert nearpc(to_string=True) == emu_0x400080
    assert emulate(to_string=True, emulate=False) == emu_0x400080
    assert pdisass(to_string=True) == emu_0x400080
    assert u(to_string=True) == emu_0x400080