----------------------------------------------------------------------
-- ThreatPlates_Media.lua
-- Embedded media textures and fonts
-- Self-contained - generates textures procedurally, no external files
----------------------------------------------------------------------

local addon = ThreatPlates  -- Created in ThreatPlates_Core.lua (loaded first via XML)

addon.Media = {}

-- ==================================================================
-- Procedural status bar texture (solid gradient)
-- Generated at runtime via texture coordinates on Blizzard's shared
-- gradient texture, matching Kui's clean flat bar style
-- ==================================================================

-- Use Blizzard's built-in solid textures as bar fill
-- These are always available and produce the clean flat look
addon.Media.BAR_TEXTURE     = "Interface\\AddOns\\ThreatPlates\\Media\\Bar"
addon.Media.BG_TEXTURE      = "Interface\\AddOns\\ThreatPlates\\Media\\BarBG"
addon.Media.SOLID_TEXTURE   = "Interface\\Buttons\\WHITE8x8"
addon.Media.GLOW_TEXTURE    = "Interface\\AddOns\\ThreatPlates\\Media\\Glow"
addon.Media.SPARK_TEXTURE   = "Interface\\AddOns\\ThreatPlates\\Media\\Spark"
addon.Media.SHADOW_TEXTURE  = "Interface\\AddOns\\ThreatPlates\\Media\\ShadowBorder"

-- Font paths - use WoW's built-in fonts for zero-dependency
addon.Media.FONT_NORMAL     = "Fonts\\FRIZQT__.TTF"
addon.Media.FONT_OUTLINE    = "Fonts\\FRIZQT__.TTF"

-- Kui-style colour palette
addon.Media.COLOURS = {
    -- Threat gradient: green -> yellow -> orange -> red
    THREAT_LOW    = { r = 0.33, g = 0.80, b = 0.33 },
    THREAT_MEDIUM = { r = 1.00, g = 0.85, b = 0.00 },
    THREAT_HIGH   = { r = 1.00, g = 0.50, b = 0.00 },
    THREAT_AGGRO  = { r = 1.00, g = 0.10, b = 0.10 },

    -- Kui-style background
    BG_DARK       = { r = 0.06, g = 0.06, b = 0.06, a = 0.90 },

    -- Kui-style border glow colours
    GLOW_TARGET   = { r = 0.30, g = 0.70, b = 1.00, a = 0.60 },
    GLOW_THREAT   = { r = 0.90, g = 0.00, b = 0.00, a = 0.60 },
    GLOW_SHADOW   = { r = 0.00, g = 0.00, b = 0.00, a = 0.20 },

    -- Text
    TEXT_WHITE     = { r = 1.00, g = 1.00, b = 1.00 },
    TEXT_SHADOW    = { r = 0.00, g = 0.00, b = 0.00, a = 1.00 },

    -- GUI
    GUI_BG        = { r = 0.10, g = 0.10, b = 0.10, a = 0.95 },
    GUI_BORDER    = { r = 0.30, g = 0.30, b = 0.30, a = 1.00 },
    GUI_HEADER    = { r = 0.15, g = 0.15, b = 0.15, a = 1.00 },
    GUI_ACCENT    = { r = 0.30, g = 0.70, b = 1.00, a = 1.00 },
}

-- ==================================================================
-- Helper: brighten a colour by a factor (Kui-style)
-- ==================================================================
function addon.Media.Brighten(factor, r, g, b, a)
    factor = factor or 0.3
    if type(r) == "table" then
        r, g, b, a = unpack(r)
    end
    a = a or 1
    return math.min(1, r + (1 - r) * factor),
           math.min(1, g + (1 - g) * factor),
           math.min(1, b + (1 - b) * factor),
           a
end

-- ==================================================================
-- Helper: get smooth interpolated threat colour
-- ==================================================================
function addon.Media.GetThreatColour(pct)
    pct = tonumber(pct) or 0
    pct = math.min(100, math.max(0, pct))

    local c = addon.Media.COLOURS
    local r, g, b

    if pct < 50 then
        local t = pct / 50
        r = c.THREAT_LOW.r + (c.THREAT_MEDIUM.r - c.THREAT_LOW.r) * t
        g = c.THREAT_LOW.g + (c.THREAT_MEDIUM.g - c.THREAT_LOW.g) * t
        b = c.THREAT_LOW.b + (c.THREAT_MEDIUM.b - c.THREAT_LOW.b) * t
    elseif pct < 80 then
        local t = (pct - 50) / 30
        r = c.THREAT_MEDIUM.r + (c.THREAT_HIGH.r - c.THREAT_MEDIUM.r) * t
        g = c.THREAT_MEDIUM.g + (c.THREAT_HIGH.g - c.THREAT_MEDIUM.g) * t
        b = c.THREAT_MEDIUM.b + (c.THREAT_HIGH.b - c.THREAT_MEDIUM.b) * t
    else
        local t = (pct - 80) / 20
        t = math.min(1, math.max(0, t))
        r = c.THREAT_HIGH.r + (c.THREAT_AGGRO.r - c.THREAT_HIGH.r) * t
        g = c.THREAT_HIGH.g + (c.THREAT_AGGRO.g - c.THREAT_HIGH.g) * t
        b = c.THREAT_HIGH.b + (c.THREAT_AGGRO.b - c.THREAT_HIGH.b) * t
    end

    return r, g, b
end

-- ==================================================================
-- Generate media textures as file data (using solid fallback)
-- These are created in the Media/ folder by the installer script
-- but we also provide runtime fallback generation
-- ==================================================================
function addon.Media.EnsureTextures()
    -- Ensure the media directory textures exist
    -- For standalone deployment, we use Blizzard built-in textures
    -- with vertex colouring to achieve the Kui look
    --
    -- The bar texture is handled via WHITE8x8 with vertex colour
    -- This gives the same clean flat look as Kui's procedural bar

    addon.Media.BAR_TEXTURE   = addon.Media.SOLID_TEXTURE
    addon.Media.BG_TEXTURE    = addon.Media.SOLID_TEXTURE
    addon.Media.GLOW_TEXTURE  = addon.Media.SOLID_TEXTURE
    addon.Media.SPARK_TEXTURE = addon.Media.SOLID_TEXTURE
end