"""
Image extension for qrm
---
Copyright (C) 2019 Abigail Gold, 0x5c

This file is part of discord-qrm2 and is released under the terms of the GNU
General Public License, version 2.
"""

import io

import discord
import discord.ext.commands as commands

import common as cmn


class ImageCog(commands.Cog):
    def __init__(self, bot: commands.Bot):
        self.bot = bot
        self.bandcharts = cmn.ImagesGroup(cmn.paths.bandcharts / "meta.json")
        self.maps = cmn.ImagesGroup(cmn.paths.maps / "meta.json")
        self.session = bot.qrm.session

    @commands.command(name="bandplan", aliases=['plan', 'bands'], category=cmn.cat.ref)
    async def _bandplan(self, ctx: commands.Context, region: str = ''):
        '''Posts an image of Frequency Allocations.'''
        arg = region.lower()

        with ctx.typing():
            embed = cmn.embed_factory(ctx)
            if arg not in self.bandcharts:
                desc = 'Possible arguments are:\n'
                for key, img in self.bandcharts.items():
                    desc += f'`{key}`: {img.name}{("  " + img.emoji if img.emoji else "")}\n'
                embed.title = f'Bandplan Not Found!'
                embed.description = desc
                embed.colour = cmn.colours.bad
                await ctx.send(embed=embed)
            else:
                metadata: cmn.ImageMetadata = self.bandcharts[arg]
                img = discord.File(cmn.paths.bandcharts / metadata.filename,
                                   filename=metadata.filename)
                if metadata.description:
                    embed.description = metadata.description
                if metadata.source:
                    embed.add_field(name="Source", value=metadata.source)
                embed.title = metadata.long_name + ("  " + metadata.emoji if metadata.emoji else "")
                embed.colour = cmn.colours.good
                embed.set_image(url='attachment://' + metadata.filename)
                await ctx.send(embed=embed, file=img)

    @commands.command(name="map", category=cmn.cat.maps)
    async def _map(self, ctx: commands.Context, map_id: str = ''):
        '''Posts an image of a ham-relevant map.'''
        arg = map_id.lower()

        with ctx.typing():
            embed = cmn.embed_factory(ctx)
            if arg not in self.maps:
                desc = 'Possible arguments are:\n'
                for key, img in self.maps.items():
                    desc += f'`{key}`: {img.name}{("  " + img.emoji if img.emoji else "")}\n'
                embed.title = 'Map Not Found!'
                embed.description = desc
                embed.colour = cmn.colours.bad
                await ctx.send(embed=embed)
            else:
                metadata: cmn.ImageMetadata = self.maps[arg]
                img = discord.File(cmn.paths.maps / metadata.filename,
                                   filename=metadata.filename)
                if metadata.description:
                    embed.description = metadata.description
                if metadata.source:
                    embed.add_field(name="Source", value=metadata.source)
                embed.title = metadata.long_name + ("  " + metadata.emoji if metadata.emoji else "")
                embed.colour = cmn.colours.good
                embed.set_image(url='attachment://' + metadata.filename)
                await ctx.send(embed=embed, file=img)

    @commands.command(name="grayline", aliases=['greyline', 'grey', 'gray', 'gl'], category=cmn.cat.maps)
    async def _grayline(self, ctx: commands.Context):
        '''Posts a map of the current greyline, where HF propagation is the best.'''
        gl_url = ('http://www.fourmilab.ch/cgi-bin/uncgi/Earth?img=NOAAtopo.evif'
                  '&imgsize=320&dynimg=y&opt=-p&lat=&lon=&alt=&tle=&date=0&utc=&jd=')
        with ctx.typing():
            embed = cmn.embed_factory(ctx)
            embed.title = 'Current Greyline Conditions'
            embed.colour = cmn.colours.good
            async with self.session.get(gl_url) as resp:
                if resp.status != 200:
                    embed.description = 'Could not download file...'
                    embed.colour = cmn.colours.bad
                else:
                    data = io.BytesIO(await resp.read())
                    embed.set_image(url=f'attachment://greyline.jpg')
        await ctx.send(embed=embed, file=discord.File(data, 'greyline.jpg'))


def setup(bot: commands.Bot):
    bot.add_cog(ImageCog(bot))