import sys
import nose
from nose.tools import assert_raises
from mpl_toolkits.mplot3d import Axes3D, axes3d
from matplotlib import cm
from matplotlib.testing.decorators import image_comparison, cleanup
import matplotlib.pyplot as plt
import numpy as np


@image_comparison(baseline_images=['bar3d'], remove_text=True)
def test_bar3d():
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    for c, z in zip(['r', 'g', 'b', 'y'], [30, 20, 10, 0]):
        xs = np.arange(20)
        ys = np.arange(20)
        cs = [c] * len(xs)
        cs[0] = 'c'
        ax.bar(xs, ys, zs=z, zdir='y', color=cs, alpha=0.8)


@image_comparison(baseline_images=['contour3d'], remove_text=True)
def test_contour3d():
    fig = plt.figure()
    ax = fig.gca(projection='3d')
    X, Y, Z = axes3d.get_test_data(0.05)
    cset = ax.contour(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)
    cset = ax.contour(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)
    cset = ax.contour(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)
    ax.set_xlim(-40, 40)
    ax.set_ylim(-40, 40)
    ax.set_zlim(-100, 100)


@image_comparison(baseline_images=['contourf3d'], remove_text=True)
def test_contourf3d():
    fig = plt.figure()
    ax = fig.gca(projection='3d')
    X, Y, Z = axes3d.get_test_data(0.05)
    cset = ax.contourf(X, Y, Z, zdir='z', offset=-100, cmap=cm.coolwarm)
    cset = ax.contourf(X, Y, Z, zdir='x', offset=-40, cmap=cm.coolwarm)
    cset = ax.contourf(X, Y, Z, zdir='y', offset=40, cmap=cm.coolwarm)
    ax.set_xlim(-40, 40)
    ax.set_ylim(-40, 40)
    ax.set_zlim(-100, 100)


@image_comparison(baseline_images=['contourf3d_fill'], remove_text=True)
def test_contourf3d_fill():
    fig = plt.figure()
    ax = fig.gca(projection='3d')
    X, Y = np.meshgrid(np.arange(-2, 2, 0.25), np.arange(-2, 2, 0.25))
    Z = X.clip(0, 0)
    # This produces holes in the z=0 surface that causes rendering errors if
    # the Poly3DCollection is not aware of path code information (issue #4784)
    Z[::5, ::5] = 0.1
    cset = ax.contourf(X, Y, Z, offset=0, levels=[-0.1, 0], cmap=cm.coolwarm)
    ax.set_xlim(-2, 2)
    ax.set_ylim(-2, 2)
    ax.set_zlim(-1, 1)


@image_comparison(baseline_images=['lines3d'], remove_text=True)
def test_lines3d():
    fig = plt.figure()
    ax = fig.gca(projection='3d')
    theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)
    z = np.linspace(-2, 2, 100)
    r = z ** 2 + 1
    x = r * np.sin(theta)
    y = r * np.cos(theta)
    ax.plot(x, y, z)


@image_comparison(baseline_images=['mixedsubplot'], remove_text=True)
def test_mixedsubplots():
    def f(t):
        s1 = np.cos(2*np.pi*t)
        e1 = np.exp(-t)
        return np.multiply(s1, e1)

    t1 = np.arange(0.0, 5.0, 0.1)
    t2 = np.arange(0.0, 5.0, 0.02)

    fig = plt.figure(figsize=plt.figaspect(2.))
    ax = fig.add_subplot(2, 1, 1)
    l = ax.plot(t1, f(t1), 'bo',
                t2, f(t2), 'k--', markerfacecolor='green')
    ax.grid(True)

    ax = fig.add_subplot(2, 1, 2, projection='3d')
    X, Y = np.meshgrid(np.arange(-5, 5, 0.25), np.arange(-5, 5, 0.25))
    R = np.sqrt(X ** 2 + Y ** 2)
    Z = np.sin(R)

    surf = ax.plot_surface(X, Y, Z, rstride=1, cstride=1,
                           linewidth=0, antialiased=False)

    ax.set_zlim3d(-1, 1)


@image_comparison(baseline_images=['scatter3d'], remove_text=True)
def test_scatter3d():
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    ax.scatter(np.arange(10), np.arange(10), np.arange(10),
               c='r', marker='o')
    ax.scatter(np.arange(10, 20), np.arange(10, 20), np.arange(10, 20),
               c='b', marker='^')


@image_comparison(baseline_images=['surface3d'], remove_text=True)
def test_surface3d():
    fig = plt.figure()
    ax = fig.gca(projection='3d')
    X = np.arange(-5, 5, 0.25)
    Y = np.arange(-5, 5, 0.25)
    X, Y = np.meshgrid(X, Y)
    R = np.sqrt(X ** 2 + Y ** 2)
    Z = np.sin(R)
    surf = ax.plot_surface(X, Y, Z, rstride=1, cstride=1, cmap=cm.coolwarm,
                           lw=0, antialiased=False)
    ax.set_zlim(-1.01, 1.01)
    fig.colorbar(surf, shrink=0.5, aspect=5)


@image_comparison(baseline_images=['text3d'])
def test_text3d():
    fig = plt.figure()
    ax = fig.gca(projection='3d')

    zdirs = (None, 'x', 'y', 'z', (1, 1, 0), (1, 1, 1))
    xs = (2, 6, 4, 9, 7, 2)
    ys = (6, 4, 8, 7, 2, 2)
    zs = (4, 2, 5, 6, 1, 7)

    for zdir, x, y, z in zip(zdirs, xs, ys, zs):
        label = '(%d, %d, %d), dir=%s' % (x, y, z, zdir)
        ax.text(x, y, z, label, zdir)

    ax.text(1, 1, 1, "red", color='red')
    ax.text2D(0.05, 0.95, "2D Text", transform=ax.transAxes)
    ax.set_xlim3d(0, 10)
    ax.set_ylim3d(0, 10)
    ax.set_zlim3d(0, 10)
    ax.set_xlabel('X axis')
    ax.set_ylabel('Y axis')
    ax.set_zlabel('Z axis')


@image_comparison(baseline_images=['trisurf3d'], remove_text=True)
def test_trisurf3d():
    n_angles = 36
    n_radii = 8
    radii = np.linspace(0.125, 1.0, n_radii)
    angles = np.linspace(0, 2*np.pi, n_angles, endpoint=False)
    angles = np.repeat(angles[..., np.newaxis], n_radii, axis=1)
    angles[:, 1::2] += np.pi/n_angles

    x = np.append(0, (radii*np.cos(angles)).flatten())
    y = np.append(0, (radii*np.sin(angles)).flatten())
    z = np.sin(-x*y)

    fig = plt.figure()
    ax = fig.gca(projection='3d')
    ax.plot_trisurf(x, y, z, cmap=cm.jet, linewidth=0.2)


@image_comparison(baseline_images=['wireframe3d'], remove_text=True)
def test_wireframe3d():
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    X, Y, Z = axes3d.get_test_data(0.05)
    ax.plot_wireframe(X, Y, Z, rstride=10, cstride=10)


@image_comparison(baseline_images=['wireframe3dzerocstride'], remove_text=True,
                  extensions=['png'])
def test_wireframe3dzerocstride():
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    X, Y, Z = axes3d.get_test_data(0.05)
    ax.plot_wireframe(X, Y, Z, rstride=10, cstride=0)


@image_comparison(baseline_images=['wireframe3dzerorstride'], remove_text=True,
                  extensions=['png'])
def test_wireframe3dzerorstride():
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    X, Y, Z = axes3d.get_test_data(0.05)
    ax.plot_wireframe(X, Y, Z, rstride=0, cstride=10)

@cleanup
def test_wireframe3dzerostrideraises():
    if sys.version_info[:2] < (2, 7):
        raise nose.SkipTest("assert_raises as context manager "
                            "not supported with Python < 2.7")
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    X, Y, Z = axes3d.get_test_data(0.05)
    with assert_raises(ValueError):
        ax.plot_wireframe(X, Y, Z, rstride=0, cstride=0)

@image_comparison(baseline_images=['quiver3d'], remove_text=True)
def test_quiver3d():
    fig = plt.figure()
    ax = fig.gca(projection='3d')

    x, y, z = np.ogrid[-1:0.8:10j, -1:0.8:10j, -1:0.6:3j]

    u = np.sin(np.pi * x) * np.cos(np.pi * y) * np.cos(np.pi * z)
    v = -np.cos(np.pi * x) * np.sin(np.pi * y) * np.cos(np.pi * z)
    w = (np.sqrt(2.0 / 3.0) * np.cos(np.pi * x) * np.cos(np.pi * y) *
            np.sin(np.pi * z))

    ax.quiver(x, y, z, u, v, w, length=0.1)

@image_comparison(baseline_images=['quiver3d_empty'], remove_text=True)
def test_quiver3d_empty():
    fig = plt.figure()
    ax = fig.gca(projection='3d')

    x, y, z = np.ogrid[-1:0.8:0j, -1:0.8:0j, -1:0.6:0j]

    u = np.sin(np.pi * x) * np.cos(np.pi * y) * np.cos(np.pi * z)
    v = -np.cos(np.pi * x) * np.sin(np.pi * y) * np.cos(np.pi * z)
    w = (np.sqrt(2.0 / 3.0) * np.cos(np.pi * x) * np.cos(np.pi * y) *
            np.sin(np.pi * z))

    ax.quiver(x, y, z, u, v, w, length=0.1)

@image_comparison(baseline_images=['quiver3d_masked'], remove_text=True)
def test_quiver3d_masked():
    fig = plt.figure()
    ax = fig.gca(projection='3d')

    # Using mgrid here instead of ogrid because masked_where doesn't
    # seem to like broadcasting very much...
    x, y, z = np.mgrid[-1:0.8:10j, -1:0.8:10j, -1:0.6:3j]

    u = np.sin(np.pi * x) * np.cos(np.pi * y) * np.cos(np.pi * z)
    v = -np.cos(np.pi * x) * np.sin(np.pi * y) * np.cos(np.pi * z)
    w = (np.sqrt(2.0 / 3.0) * np.cos(np.pi * x) * np.cos(np.pi * y) *
            np.sin(np.pi * z))
    u = np.ma.masked_where((-0.4 < x) & (x < 0.1), u, copy=False)
    v = np.ma.masked_where((0.1 < y) & (y < 0.7), v, copy=False)

    ax.quiver(x, y, z, u, v, w, length=0.1)

@image_comparison(baseline_images=['quiver3d_pivot_middle'], remove_text=True,
                  extensions=['png'])
def test_quiver3d_pivot_middle():
    fig = plt.figure()
    ax = fig.gca(projection='3d')