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from lets_plot import *

import pandas as pd
LetsPlot.setup_html()

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# Support of multiple lines

d = {
    'hjust': [0, 0.5, 1],
    'vjust': [0, 0.5, 1],
    'angle': [0, 30],
    'label': ["first line\nsecond line"]
}

from itertools import product
td = pd.DataFrame(product(*d.values()), columns=d.keys())

p = (ggplot(td, aes(x='hjust', y='vjust')) + 
    geom_point(size=3) +
    theme_light() + theme(panel_grid=element_blank())
)

pf = (p + scale_x_continuous(breaks=[0, 0.5, 1]) +
    scale_y_continuous(breaks=[0, 0.5, 1], expand=[0.4]) +
    facet_grid(x='angle', x_format='{d}°'))

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pf + geom_text(aes(label='label', hjust='hjust', vjust='vjust', angle='angle'), size=9)

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pf + geom_label(aes(label='label', hjust='hjust', vjust='vjust', angle='angle'), size=9, alpha=0.5)

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# Change lineheight

# lineheight = 0.7

p + geom_text(aes(label='label', hjust='hjust', vjust='vjust'), size=9, lineheight=0.7)

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p + geom_label(aes(label='label', hjust='hjust', vjust='vjust'), size=9, alpha=0.5, lineheight=0.7)

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# lineheight = 2.0

p + geom_text(aes(label='label', hjust='hjust', vjust='vjust'), size=9, lineheight=2)

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p + geom_label(aes(label='label', hjust='hjust', vjust='vjust'), size=9, alpha=0.5, lineheight=2)

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# Adjust position by nudging a given offset

p2 = ggplot({'x': ['a', 'b', 'c'], 'y': [1.2, 3.4, 2.5]}, aes('x', 'y')) + geom_point(size=4) + ggsize(500, 300)

p2 + geom_text(aes(label = 'y'))

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# Move text - use 'position_nudge'

p2 + geom_text(aes(label = 'y'), position=position_nudge(y=0.2))

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# Same with 'nudge_y'

p2 + geom_text(aes(label = 'y'), nudge_y=0.2)

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# Justification: 'inward' and 'outward'

df = {
   'x' : [1, 1, 2, 2, 1.5],
   'y' : [1, 2, 1, 2, 1.5],
   'text': ["bottom-left", "top-left", "bottom-right", "top-right", "center"]
}


p3 = ggplot(df, aes('x', 'y')) + geom_point(size=4) + ggsize(500, 300)
p3 + geom_text(aes(label = 'text'), size = 8)

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p3 + geom_text(aes(label = 'text'), size = 8, hjust = 'inward', vjust = 'inward')

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p3 + geom_text(aes(label = 'text'), size = 8, hjust = 'outward', vjust = 'outward')

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# livemap: geom_label parameters and multiple lines support
data = {
    'city': ['New York City', 'Prague'],
    'lon': [-73.7997, 14.418540],
    'lat': [40.6408, 50.073658],
}


ggplot(data, aes(x='lon', y='lat')) + \
    geom_livemap(projection='epsg4326', tiles=maptiles_lets_plot(theme='dark')) + \
    geom_path(color='white') + \
    geom_label(aes(label='city'), fill='black', color='white',
               size=8, angle=10, hjust=0, vjust=1,
               label_padding=0.6, label_r=0.5, label_size=1.5) + \
    geom_text(
        x=0, y=50,
        label="Average flight time: 8 hrs 43 mins\n" + 
              "The shortest distance (air line): 4,082.79 mi",
        size=7, hjust=1, lineheight=2, color='white')

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