"""
Image extension for qrm
---
Copyright (C) 2019-2020 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 aiohttp

import discord
import discord.ext.commands as commands

import common as cmn


class ImageCog(commands.Cog):
    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=')

    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 = aiohttp.ClientSession(connector=bot.qrm.connector)

    @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.'''
        async with ctx.typing():
            arg = region.lower()
            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)
                return
            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.'''
        async with ctx.typing():
            arg = map_id.lower()
            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)
                return
            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.'''
        async with ctx.typing():
            embed = cmn.embed_factory(ctx)
            embed.title = 'Current Greyline Conditions'
            embed.colour = cmn.colours.good
            async with self.session.get(self.gl_url) as resp:
                if resp.status != 200:
                    embed.description = 'Could not download file...'
                    embed.colour = cmn.colours.bad
                    await ctx.send(embed=embed)
                    return
                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))