__filename__ = "theme.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "1.1.0"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"

import os
from utils import loadJson
from utils import saveJson


def getThemesList() -> []:
    """Returns the list of available themes
    Note that these should be capitalized, since they're
    also used to create the web interface dropdown list
    and to lookup function names
    """
    return ('Default', 'Light', 'Purple', 'Hacker', 'HighVis')


def setThemeInConfig(baseDir: str, name: str) -> bool:
    configFilename = baseDir + '/config.json'
    if not os.path.isfile(configFilename):
        return False
    configJson = loadJson(configFilename, 0)
    if not configJson:
        return False
    configJson['theme'] = name
    return saveJson(configJson, configFilename)


def getTheme(baseDir: str) -> str:
    configFilename = baseDir + '/config.json'
    if os.path.isfile(configFilename):
        configJson = loadJson(configFilename, 0)
        if configJson:
            if configJson.get('theme'):
                return configJson['theme']
    return 'default'


def removeTheme(baseDir: str):
    themeFiles = ('epicyon.css', 'login.css', 'follow.css',
                  'suspended.css', 'calendar.css', 'blog.css')
    for filename in themeFiles:
        if os.path.isfile(baseDir + '/' + filename):
            os.remove(baseDir + '/' + filename)


def setThemeDefault(baseDir: str):
    removeTheme(baseDir)
    setThemeInConfig(baseDir, 'default')
    themeParams = {
        "dummyValue": "1234",
    }
    setThemeFromDict(baseDir, 'default', themeParams)


def setCSSparam(css: str, param: str, value: str) -> str:
    """Sets a CSS parameter to a given value
    """
    # is this just a simple string replacement?
    if ';' in param:
        return css.replace(param, value)
    # color replacement
    if param.startswith('rgba('):
        return css.replace(param, value)
    # if the parameter begins with * then don't prepend --
    if param.startswith('*'):
        searchStr = param.replace('*', '') + ':'
    else:
        searchStr = '--' + param + ':'
    if searchStr not in css:
        return css
    s = css.split(searchStr)
    newcss = ''
    for sectionStr in s:
        if not newcss:
            if sectionStr:
                newcss = sectionStr
            else:
                newcss = ' '
        else:
            if ';' in sectionStr:
                newcss += \
                    searchStr + ' ' + value + ';' + sectionStr.split(';', 1)[1]
            else:
                newcss += searchStr + ' ' + sectionStr
    return newcss.strip()


def setThemeFromDict(baseDir: str, name: str, themeParams: {}) -> None:
    """Uses a dictionary to set a theme
    """
    setThemeInConfig(baseDir, name)
    themeFiles = ('epicyon.css', 'login.css', 'follow.css',
                  'suspended.css', 'calendar.css', 'blog.css')
    for filename in themeFiles:
        templateFilename = baseDir + '/epicyon-' + filename
        if filename == 'epicyon.css':
            templateFilename = baseDir + '/epicyon-profile.css'
        if not os.path.isfile(templateFilename):
            continue
        with open(templateFilename, 'r') as cssfile:
            css = cssfile.read()
            for paramName, paramValue in themeParams.items():
                css = setCSSparam(css, paramName, paramValue)
            filename = baseDir + '/' + filename
            with open(filename, 'w') as cssfile:
                cssfile.write(css)


def setCustomFont(baseDir: str):
    """Uses a dictionary to set a theme
    """
    customFontExt = None
    customFontType = None
    fontExtension = {
        'woff': 'woff',
        'woff2': 'woff2',
        'otf': 'opentype',
        'ttf': 'truetype'
    }
    for ext, extType in fontExtension.items():
        filename = baseDir + '/fonts/custom.' + ext
        if os.path.isfile(filename):
            customFontExt = ext
            customFontType = extType
    if not customFontExt:
        return

    themeFiles = ('epicyon.css', 'login.css', 'follow.css',
                  'suspended.css', 'calendar.css', 'blog.css')
    for filename in themeFiles:
        templateFilename = baseDir + '/' + filename
        if not os.path.isfile(templateFilename):
            continue
        with open(templateFilename, 'r') as cssfile:
            css = cssfile.read()
            css = \
                setCSSparam(css, "*src",
                            "url('./fonts/custom." +
                            customFontExt +
                            "') format('" +
                            customFontType + "')")
            css = setCSSparam(css, "*font-family", "'CustomFont'")
            filename = baseDir + '/' + filename
            with open(filename, 'w') as cssfile:
                cssfile.write(css)


def setThemeHighVis(baseDir: str):
    themeParams = {
        "font-size-header": "22px",
        "font-size": "45px",
        "font-size2": "45px",
        "font-size3": "45px",
        "font-size4": "35px",
        "font-size5": "29px",
        "gallery-font-size": "35px",
        "gallery-font-size-mobile": "55px"
    }
    setThemeFromDict(baseDir, 'highvis', themeParams)


def setThemePurple(baseDir: str):
    themeParams = {
        "main-bg-color": "#1f152d",
        "main-bg-color-reply": "#1a142d",
        "main-bg-color-report": "#12152d",
        "main-header-color-roles": "#1f192d",
        "main-fg-color": "#f98bb0",
        "border-color": "#3f2145",
        "main-link-color": "#ff42a0",
        "main-visited-color": "#f93bb0",
        "button-selected": "#c042a0",
        "button-background": "#ff42a0",
        "button-text": "white",
        "background-color: #554;": "background-color: #ff42a0;",
        "color: #FFFFFE;": "color: #1f152d;",
        "calendar-bg-color": "#eee",
        "lines-color": "#ff42a0",
        "day-number": "#3f2145",
        "day-number2": "#1f152d",
        "time-color": "#ff42a0",
        "place-color": "black",
        "event-color": "#282c37",
        "today-foreground": "white",
        "today-circle": "red",
        "event-background": "yellow",
        "event-foreground": "white",
        "title-text": "white",
        "title-background": "#ff42a0",
        "gallery-text-color": "#ccc"
    }
    setThemeFromDict(baseDir, 'purple', themeParams)


def setThemeHacker(baseDir: str):
    themeParams = {
        "main-bg-color": "black",
        "main-bg-color-reply": "#030202",
        "main-bg-color-report": "#050202",
        "main-header-color-roles": "#1f192d",
        "main-fg-color": "#00ff00",
        "border-color": "#035103",
        "main-link-color": "#2fff2f",
        "main-visited-color": "#3c8234",
        "button-selected": "#063200",
        "button-background": "#062200",
        "button-text": "#00ff00",
        "button-corner-radius": "4px",
        "timeline-border-radius": "4px",
        "*font-family": "'Bedstead'",
        "*src": "url('./fonts/bedstead.otf') format('opentype')",
        "background-color: #554;": "background-color: #062200;",
        "color: #FFFFFE;": "color: green;",
        "calendar-bg-color": "black",
        "lines-color": "green",
        "day-number": "green",
        "day-number2": "darkgreen",
        "time-color": "darkgreen",
        "place-color": "green",
        "event-color": "green",
        "today-foreground": "white",
        "today-circle": "red",
        "event-background": "lightgreen",
        "event-foreground": "black",
        "title-text": "black",
        "title-background": "darkgreen",
        "gallery-text-color": "green"
    }
    setThemeFromDict(baseDir, 'hacker', themeParams)


def setThemeLight(baseDir: str):
    themeParams = {
        "rgba(0, 0, 0, 0.5)": "rgba(0, 0, 0, 0.0)",
        "main-bg-color": "#e6ebf0",
        "main-bg-color-reply": "#e0dbf0",
        "main-bg-color-report": "#e3dbf0",
        "main-header-color-roles": "#ebebf0",
        "main-fg-color": "#2d2c37",
        "border-color": "#c0cdd9",
        "main-link-color": "#2a2c37",
        "main-visited-color": "#232c37",
        "text-entry-foreground": "#111",
        "text-entry-background": "white",
        "font-color-header": "black",
        "dropdown-bg-color": "white",
        "dropdown-bg-color-hover": "lightgrey",
        "background-color: #554;": "background-color: white;",
        "color: #FFFFFE;": "color: black;",
        "calendar-bg-color": "#e6ebf0",
        "lines-color": "darkblue",
        "day-number": "black",
        "day-number2": "#282c37",
        "place-color": "black",
        "event-color": "#282c37",
        "today-foreground": "white",
        "today-circle": "red",
        "event-background": "lightblue",
        "event-foreground": "white",
        "title-text": "#282c37",
        "title-background": "#ccc",
        "gallery-text-color": "black"
    }
    setThemeFromDict(baseDir, 'light', themeParams)


def setTheme(baseDir: str, name: str) -> bool:
    result = False

    themes = getThemesList()
    for themeName in themes:
        if name == themeName.lower():
            themeFunctionName = 'setTheme' + themeName
            themeFunctionName(baseDir)
            result = True

    if not result:
        # default
        setThemeDefault(baseDir)
        result = True

    setCustomFont(baseDir)
    return result