"""
Display output of a given script.

Display output of any executable script set by `script_path`. Only the first
two lines of output will be used. The first line is used as the displayed
text. If the output has two or more lines, the second line is set as the text
color (and should hence be a valid hex color code such as #FF0000 for red).
The script should not have any parameters, but it could work.

Configuration parameters:
    button_show_notification: button to show notification with full output
        (default None)
    cache_timeout: how often we refresh this module in seconds
        (default 15)
    format: see placeholders below (default '{output}')
    localize: should script output be localized (if available)
        (default True)
    script_path: script you want to show output of (compulsory)
        (default None)
    strip_output: shall we strip leading and trailing spaces from output
        (default False)

Format placeholders:
    {lines} number of lines in the output
    {output} output of script given by "script_path"

Examples:
```
external_script {
    format = "my name is {output}"
    script_path = "/usr/bin/whoami"
}
```

@author frimdo ztracenastopa@centrum.cz

SAMPLE OUTPUT
{'full_text': 'script output'}

example
{'full_text': 'It is now: Wed Feb 22 22:24:13'}
"""

import re

STRING_ERROR = "missing script_path"


class Py3status:
    """
    """

    # available configuration parameters
    button_show_notification = None
    cache_timeout = 15
    format = "{output}"
    localize = True
    script_path = None
    strip_output = False

    def post_config_hook(self):
        if not self.script_path:
            raise Exception(STRING_ERROR)

    def external_script(self):
        output_lines = None
        response = {}
        response["cached_until"] = self.py3.time_in(self.cache_timeout)
        try:
            self.output = self.py3.command_output(
                self.script_path, shell=True, localized=self.localize
            )
            output_lines = self.output.splitlines()
            if len(output_lines) > 1:
                output_color = output_lines[1]
                if re.search(r"^#[0-9a-fA-F]{6}$", output_color):
                    response["color"] = output_color
        except self.py3.CommandError as e:
            # something went wrong show error to user
            output = e.output or e.error
            self.py3.error(output)

        if output_lines:
            output = output_lines[0]
            if self.strip_output:
                output = output.strip()
            # If we get something that looks numeric then we convert it
            # to a numeric type because this can be helpful. for example:
            #
            # external_script {
            #     format = "file is [\?if=output>10 big|small]"
            #     script_path = "cat /tmp/my_file | wc -l"
            # }
            try:
                output = int(output)
            except ValueError:
                try:
                    output = float(output)
                except ValueError:
                    pass
        else:
            output = ""

        response["full_text"] = self.py3.safe_format(
            self.format, {"output": output, "lines": len(output_lines)}
        )
        return response

    def on_click(self, event):
        button = event["button"]
        if button == self.button_show_notification:
            self.py3.notify_user(self.output)
            self.py3.prevent_refresh()


if __name__ == "__main__":
    """
    Run module in test mode.
    """
    from py3status.module_test import module_test

    module_test(Py3status)
