settings.define("mplayer.colors.bg", {
    description = "Background color in media player",
    default = 0x131313, -- #131313
    type = number
})

settings.define("mplayer.colors.fg", {
    description = "Text color in media player",
    default = 0xEFEFEF, -- #EFEFEF
    type = number
})

settings.define("mplayer.colors.cursor", {
    description = "Color of the cursor",
    default = 0x8080EF, -- #8080EF
    type = number
})

settings.define("mplayer.colors.current", {
    description = "Color of the currently playing song",
    default = 0xEFEF80, -- #EFEF80
    type = number
})

settings.define("mplayer.colors.status", {
    description = "Color of the statusbar",
    default = 0x80EF80, -- #80EF80
    type = number
})



local mplayer = {
    colors = {
        bg = colors.black,
        fg = colors.white,
        cursor = colors.blue,
        current = colors.yellow,
        status = colors.lime
    },
    songs = {},
    scroll = 0,
    cursor = 1,
    pos = 0,
    size = 360000 * 64,
    state = "PLAYING",
    currentSong = 0,
    statusLineScroll = 0,
    highlightedLineScroll = 0,
}

local function centerText(y, bg, fg, txt)
    local w, _ = term.getSize()
    local x = math.max(1, math.floor((w - #txt) / 2))
    term.setCursorPos(x, y)
    term.setBackgroundColor(bg)
    term.setTextColor(fg)
    term.clearLine()
    term.write(txt)
end

local function time2str(ti)
    ti = math.floor(ti)
    local m, s = math.floor(ti / 60), ti % 60
    return string.format("%02d:%02d", m, s)
end

local function setupTerminal()
    for k, v in pairs(mplayer.colors) do
        term.setPaletteColor(v, settings.get("mplayer.colors." .. k))
    end
    term.setCursorPos(1, 1)
    term.setBackgroundColor(mplayer.colors.bg)
    term.setTextColor(mplayer.colors.fg)
    term.clear()
end

local function read32(fp)
    local v = 0
    for i = 1, 4 do
        local b = string.byte(fp:read(1), 1)
        v = bit32.bor(bit32.lshift(v, 8), b)
    end
    return v
end

local fp = io.open("noita.dfpwm", "rb")
if fp ~= nil then
    for i = 1, 24 do
        mplayer.songs[i] = {}
        mplayer.songs[i].offset = read32(fp)
        mplayer.songs[i].length = read32(fp)
        local title = fp:read(117)
        local zero = math.min(64, title:find("\x00") or 0)
        mplayer.songs[i].title = title:sub(1, zero)
    end
    fp:close()
end

setupTerminal()

local tw, th = term.getSize()
parallel.waitForAny(
function()
    term.setCursorPos(1, 1)
    term.clear()
    print("  0123456789abcdef")
    term.write("0  ")
    for i = 1, 255 do
        if (i % 16) == 0 then term.write(string.format("%x ", i / 16)) end
        term.write(string.char(i))
        if (i % 16) == 15 then print() end
    end
    while true do

        -- Top bar

        -- Songs list
        for i = 1, th - 3 do

        end

        local title, time, duration = "Whatever is on the tape", mplayer.pos / 6000, mplayer.size / 6000
        if mplayer.currentSong ~= 0 then
            local song = mplayer.songs[mplayer.currentSong]
            time = (mplayer.pos - song.offset) / 6000
            duration = song.length / 6000
            title = song.title
        end

        -- Statusline
        term.setCursorPos(1, th)
        term.clearLine()
        term.setTextColor(mplayer.colors.status)
        term.write("Playing: ") -- 9 characters

        -- Progressbar
        local lw = math.floor(tw * time / duration)
        term.setCursorPos(1, th - 1)
        term.setTextColor(mplayer.colors.current)
        term.clearLine()
        term.write(string.rep("=", lw))
        term.write(">")
        term.setTextColor(mplayer.colors.cursor)
        term.write(string.rep("-", tw - lw - 1))

        -- Statusline text
        term.setCursorPos(10, th)
        local timeString = string.format("[%s:%s]", time2str(time), time2str(duration))
        local w = tw - #timeString - 10 -- "Playing: " plus extra space

        term.setTextColor(mplayer.colors.current)
        if #title <= w then
            term.write(title)
        else
            local off = (mplayer.statusLineScroll % (#title + 5)) + 1
            local txt = title .. " ::: " .. title
            term.write(txt:sub(off, off + w - 1))
        end
        term.setTextColor(mplayer.colors.status)
        term.setCursorPos(tw - #timeString + 1, th)
        term.write(timeString)
        os.sleep(0.1)
    end
end,
function()
    local pretty = require("cc.pretty")
    while true do
        local _evd = { os.pullEvent() }
        local ev, evd = table.remove(_evd, 1), _evd
        if ev == "key_up" and evd[1] == keys.q then
            break
        elseif ev == "key" and evd[1] == keys.f then
            mplayer.pos = mplayer.pos + 3000
        elseif ev == "key" and evd[1] == keys.b then
            mplayer.pos = mplayer.pos - 3000
        elseif ev == "mouse_scroll" then
            local dir, x, y = table.unpack(evd)
        elseif ev == "song_change" then
            mplayer.statusLineScroll = 0
        elseif ev ~= "timer" then
            local m = term.redirect(term.native())
            io.write(ev .. " ")
            pretty.print(pretty.pretty(evd))
            term.redirect(m)
        end
    end
end,
function()
    while true do
        mplayer.statusLineScroll = mplayer.statusLineScroll + 1
        os.sleep(0.5)
    end
end,
function()
    local oldSong = nil
    while true do
        if mplayer.pos < mplayer.size then
            mplayer.pos = mplayer.pos + 600
        end
        mplayer.currentSong = 0
        for i, song in ipairs(mplayer.songs) do
            if mplayer.pos >= song.offset and mplayer.pos < (song.offset + song.length) then
                mplayer.currentSong = i
            end
        end
        if oldSong ~= mplayer.currentSong then
            os.queueEvent("song_change")
            oldSong = mplayer.currentSong
        end
        os.sleep(0.1)
    end
end
)