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from django import http

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from django.shortcuts import render, redirect

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from qmsk.pngtile import pngtile

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import pypngtile

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import json

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import os.path

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def index (request, name):

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    store = pngtile.STORE

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    try:

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        tree  = store.tree(name)

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        items = store.items(name)

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    except pngtile.NotFound:

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        raise http.Http404

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    except pngtile.InvalidImage:

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        return http.HttpResponseBadRequest(name)

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    except pngtile.UncachedImage:

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        return http.HttpResponseBadRequest(name)

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    except pngtile.Error as error:

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        return http.HttpResponseServerError(str(error))

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    except pypngtile.Error as error:

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        return http.HttpResponseServerError(str(error))

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    return render(request, 'qmsk.pngtile/index.html', dict(

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        name        = name,

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        title       = store.title(name),

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        breadcrumb  = store.breadcrumb(name),

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        tree        = tree,

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        index_items = sorted(items),

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    ))

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def image (request, name):

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    store = pngtile.STORE

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    try:

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        image, name = store.open(name)

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        tree  = store.tree(os.path.dirname(name))

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    except pngtile.NotFound:

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        raise http.Http404

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    except pngtile.InvalidImage:

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        return http.HttpResponseBadRequest(name)

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    except pngtile.UncachedImage:

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        return http.HttpResponseBadRequest(name)

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    except pngtile.Error as error:

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        return http.HttpResponseServerError(str(error))

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    except pypngtile.Error as error:

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        return http.HttpResponseServerError(str(error))

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    image_info = image.info()

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    map_config = dict(

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        tiles_url       = store.tiles_url(name),

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        tiles_mtime     = 0,

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        tile_url        = '{tiles_url}?t={tiles_mtime}&x={x}&y={y}&zoom={z}',

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        tile_size       = store.TILE_SIZE,

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        tile_zoom       = store.TILE_ZOOM,

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        image_url       = '{tiles_url}?w={w}&h={h}&x={x}&y={y}&zoom={z}',

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        image_width     = image_info['img_width'],

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        image_height    = image_info['img_height'],

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    )

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    return render(request, 'qmsk.pngtile/image.html', dict(

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        name        = name,

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        title       = store.title(name),

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        breadcrumb  = store.breadcrumb(name),

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        tree        = tree,

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        map_config  = json.dumps(map_config),

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    ))

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