CHC = {}

local isDebug = true

local rawChainHealData = {
    totalCasts = 0,
    history = {
        targets = 0,
        multistrikes = 0,
        data = {
        }
    }
}

-- Utility functions
local print = function (msg)
    if isDebug == true then
        DEFAULT_CHAT_FRAME:AddMessage(msg)
    end
end

-- Register Frame
function CHC:registerFrame()
    local CHCatcher_EventFrame = CreateFrame("Frame")
    CHC:setEventHandlers(CHCatcher_EventFrame)
end

-- Register Events
function CHC:setEventHandlers(Catcher)
    print("EventListener activated")
    Catcher:RegisterEvent("UNIT_SPELLCAST_SUCCEEDED")
    Catcher:RegisterEvent("COMBAT_LOG_EVENT")
    CHC:handleEvents(Catcher)
end

function CHC:handleEvents(Catcher)
    Catcher:SetScript("OnEvent", function(self, event, ...)
        if event == "UNIT_SPELLCAST_SUCCEEDED" then
            CHC:spellCast_Succeeded(...)
        elseif event == "COMBAT_LOG_EVENT" then
            CHC:filterTheCombatLog(...)
        end
    end)
end

function CHC:spellCast_Succeeded(...)
    local unitID, spell, rank, lineID, spellID = select(1, ...)

    -- Only do stuff on chain heal casts that succeed
    if spellId == 1064 or spell == "Chain Heal" then
        print("Finished casting " .. spell)
    end
end

function CHC:filterTheCombatLog(...)
    local type = select(2, ...)

    -- Check if combat log event is a heal
    if type == "SPELL_HEAL" then
        local spellId, spellName, spellSchool = select(12, ...)

        -- If the heal event matches chain heal and all that.
        if spellId == 1064 or spellName == "Chain Heal" then

            -- Check if the heal was a multistrike
            -- Save those separately
            if select(19, ...) == true then
                rawChainHealData.history.multistrikes = rawChainHealData.history.multistrikes + 1
                print("Multistrike #" .. rawChainHealData.history.multistrikes)
            else
                rawChainHealData.history.targets = rawChainHealData.history.targets + 1
                print("Hit #" .. rawChainHealData.history.targets .. " at " .. select(1, ...))
            end

            -- Save some of the data for later use.
            local spellData = {
                timestamp = select(1, ...),
                target = select(9, ...),
                source = select(5, ...),
                amount = select(15, ...),
                overhealing = select(16, ...),
                multistrike = select(19, ...)
            }
            table.insert(rawChainHealData.history.data, spellData)
        end
    end
end

CHC:registerFrame()