---@class CapBase : OnStageChangedListener
---@field private airbaseName string
---@field private logger table
---@field private database Database
---@field private detectionManager DetectionManager
---@field private activeStage number
---@field private capConfig table
---@field private capGroupsByName table<string, CapGroup>
---@field private sweepGroupsByName table<string, SweepGroup>
---@field private interceptGroupsByName table<string, InterceptGroup>
---@field private runwayBombingTracker RunwayBombingTracker
---@field private runwayStrikeMissions table<string, RunwayStrikeMission>
local CapBase = {}


---comment
---@param self CapBase
---@param time number
---@return number?
local CheckStateContinuous = function(self, time)
    self:CheckAndScheduleCAP()
    self:CheckAndScheduleSweep()
    self:CheckAndScheduleIntercept()
    return time + 15
end

---comment
---@param airbaseName string
---@param database Database
---@param logger table
---@param capConfig table
---@param stageConfig table
---@param runwayBombingTracker RunwayBombingTracker
---@param detectionManager DetectionManager
---@param spawnManager SpawnManager
---@return CapBase
function CapBase.new(airbaseName, database, logger, capConfig, stageConfig, runwayBombingTracker, detectionManager, spawnManager)
    CapBase.__index = CapBase
    local self = setmetatable({}, { __index = CapBase }) --[[@as CapBase]]

    self.runwayBombingTracker = runwayBombingTracker
    self.runwayStrikeMissions = {}

    self.airbaseName = airbaseName
    self.logger = logger
    self.activeStage = 0
    self.capConfig = capConfig
    self.database = database
    self.capGroupsByName = {}
    self.sweepGroupsByName = {}
    self.interceptGroupsByName = {}
    self.detectionManager = detectionManager

    local baseData = database:getAirbaseDataForZone(airbaseName)
    if baseData and baseData.CapGroups then
        for key, name in pairs(baseData.CapGroups) do
            local capGroup = Spearhead.classes.capClasses.airGroups.CapGroup.New(name, capConfig, logger, spawnManager)
            if capGroup then
                self.capGroupsByName[name] = capGroup
            end
        end
    end

    if baseData and baseData.SweepGroups then
        for key, name in pairs(baseData.SweepGroups) do
            local sweepGroup = Spearhead.classes.capClasses.airGroups.SweepGroup.New(name, capConfig, logger, spawnManager)
            if sweepGroup then
                self.sweepGroupsByName[name] = sweepGroup
            end
        end
    end

    if baseData and baseData.InterceptGroups then
        for key, name in pairs(baseData.InterceptGroups) do
            local interceptGroup = Spearhead.classes.capClasses.airGroups.InterceptGroup.New(name, capConfig, logger, detectionManager, spawnManager)
            if interceptGroup then
                self.interceptGroupsByName[name] = interceptGroup
            end
        end
    end

    local capFlights = Spearhead.Util.tableLength(self.capGroupsByName)
    local sweepFlights = Spearhead.Util.tableLength(self.sweepGroupsByName)
    local interceptFlights = Spearhead.Util.tableLength(self.interceptGroupsByName)

    logger:info(airbaseName .. " : " .. capFlights .." CAP | " .. sweepFlights .. " SWEEP | " .. interceptFlights .. " INTERCEPT")

    self:CreateRunwayStrikeMission(database)

    Spearhead.Events.AddStageNumberChangedListener(self)

    timer.scheduleFunction(CheckStateContinuous, self, timer.getTime() + 15)
    

    return self
end

---@private
---@param database Database
function CapBase:CreateRunwayStrikeMission(database)
    local airbase = Airbase.getByName(self.airbaseName)
    if not airbase then
        self.logger:debug("Could not find a airbase with name to create runway mission" .. self.airbaseName)
        return
    end

    for _, runway in pairs(airbase:getRunways()) do
        if runway then
            self.logger:debug("Runway " ..
            runway.Name ..
            " at airbase " ..
            self.airbaseName ..
            " with heading " .. runway.course .. " and length " .. runway.length .. " and width " .. runway.width)
            local mission = Spearhead.classes.stageClasses.missions.RunwayStrikeMission.new(runway, self.airbaseName,
            database, self.logger, self.runwayBombingTracker)
            self.runwayStrikeMissions[runway.Name] = mission
        end
    end
end

function CapBase:SpawnIfApplicable()
    self.logger:debug("Check spawns for airbase " .. self.airbaseName)
    for groupName, capGroup in pairs(self.capGroupsByName) do
        local targetStage = capGroup:GetZoneIDWhenStageID(tostring(self.activeStage))

        if targetStage ~= nil and capGroup:GetState() == "UnSpawned" then
            capGroup:Spawn()
        end
    end

    for groupName, sweepGroup in pairs(self.sweepGroupsByName) do
        local targetStage = sweepGroup:GetZoneIDWhenStageID(tostring(self.activeStage))

        if targetStage ~= nil and sweepGroup:GetState() == "UnSpawned" then
            sweepGroup:Spawn()
        end
    end

    for groupName, interceptGroup in pairs(self.interceptGroupsByName) do
        local targetStage = interceptGroup:GetZoneIDWhenStageID(tostring(self.activeStage))

        if targetStage ~= nil and interceptGroup:GetState() == "UnSpawned" then
            interceptGroup:Spawn()
        end
    end
end

function CapBase:CheckAndScheduleCAP()
    self.logger:debug("Check taskings for airbase " .. self.airbaseName)

    local countPerStage = {}
    local requiredPerStage = {}

    local airbase = Airbase.getByName(self.airbaseName)
    if not airbase then
        return nil
    end

    local activeStageID = tostring(self.activeStage)

    --Count back up groups that are active or reassign to the new zone if that's needed
    for _, group in pairs(self.capGroupsByName) do
        if group:IsBackup() == true then
            local state = group:GetState()
            if state == "InTransit" or state == "OnStation" or state == "RtbInTen" then
                
                local supposedTargetZoneID = group:GetZoneIDWhenStageID(activeStageID)
                local currentTargetZone = group:GetCurrentTargetZoneID()

                if supposedTargetZoneID == nil then
                    self.logger:debug("CapGroup " .. group:GetName() .. " has no target zone for stage " .. activeStageID)
                    group:SendRTB(airbase)
                else
                    if supposedTargetZoneID and supposedTargetZoneID ~= currentTargetZone then
                        if state == "RtbInTen" then
                            self.logger:debug("CapGroup " .. group:GetName() .. " is RTB in 10 minutes, sending to RTB already")
                            group:SendRTB(airbase)
                        else
                            local triggerZone = self.database:GetCapZoneForZoneID(supposedTargetZoneID)
                            if triggerZone then
                                group:SendToZone(triggerZone, supposedTargetZoneID, airbase)
                            else
                                self.logger:debug("CapGroup " .. group:GetName() .. " has no trigger zone for stage " .. activeStageID)
                                group:SendRTB(airbase)
                            end
                        end
                    end
                    
                    if countPerStage[supposedTargetZoneID] == nil then
                        countPerStage[supposedTargetZoneID] = 0
                    end

                    if supposedTargetZoneID == group:GetCurrentTargetZoneID() and (state == "OnStation" or state =="InTransit") then
                        countPerStage[supposedTargetZoneID] = countPerStage[supposedTargetZoneID] + 1
                    end
                end
            end
        end
    end

    --Schedule or reassign primary units if applicable
    for _, group in pairs(self.capGroupsByName) do
        if group:IsBackup() == false then
            local state = group:GetState()
            local supposedZone = group:GetZoneIDWhenStageID(activeStageID)
            if supposedZone then
                if requiredPerStage[supposedZone] == nil then
                    requiredPerStage[supposedZone] = 0
                end

                if countPerStage[supposedZone] == nil then
                    countPerStage[supposedZone] = 0
                end

                requiredPerStage[supposedZone] = requiredPerStage[supposedZone] + 1

                if state == "ReadyOnTheRamp" then
                    if countPerStage[supposedZone] < requiredPerStage[supposedZone] then
                        local triggerZone = self.database:GetCapZoneForZoneID(supposedZone)
                        if triggerZone then
                            group:SendToZone(triggerZone, supposedZone, airbase)
                        end

                        countPerStage[supposedZone] = countPerStage[supposedZone] + 1
                    end
                elseif state == "InTransit" or state == "OnStation" then
                    
                    if supposedZone ~= group:GetCurrentTargetZoneID() then
                        if countPerStage[supposedZone] < requiredPerStage[supposedZone] then
                            local triggerZone = self.database:GetCapZoneForZoneID(supposedZone)
                            if triggerZone then
                                group:SendToZone(triggerZone, supposedZone, airbase)
                            else
                                group:SendRTB(airbase)
                            end
                        end
                    end
                    countPerStage[supposedZone] = countPerStage[supposedZone] + 1
                elseif state == "RtbInTen" and supposedZone ~= group:GetCurrentTargetZoneID() then
                    group:SendRTB(airbase)
                end
            else
                if state == "InTransit" or state == "OnStation" or state == "RtbInTen" then
                    -- If the group is in transit or on station but has no target zone, send it back to base
                    group:SendRTB(airbase)
                end
            end
        end
    end

    for _, group in pairs(self.capGroupsByName) do
        if group:IsBackup() == true then
            if group:GetState() == "ReadyOnTheRamp" then
                local supposedZone = group:GetZoneIDWhenStageID(activeStageID)
                if supposedZone then
                    if countPerStage[supposedZone] == nil then
                        countPerStage[supposedZone] = 0
                    end

                    if requiredPerStage[supposedZone] == nil then
                        requiredPerStage[supposedZone] = 0
                    end

                    if countPerStage[supposedZone] < requiredPerStage[supposedZone] then
                        local triggerZone = self.database:GetCapZoneForZoneID(supposedZone)
                        if triggerZone then
                            group:SendToZone(triggerZone, supposedZone, airbase)
                        end
                        
                        countPerStage[supposedZone] = countPerStage[supposedZone] + 1
                    end
                end
            end
        end
    end
end

function CapBase:CheckAndScheduleSweep()
    self.logger:debug("Check sweep taskings for airbase " .. self.airbaseName)

    local airbase = Airbase.getByName(self.airbaseName)
    if not airbase then
        return nil
    end

    local activeStageID = tostring(self.activeStage)

    for _, group in pairs(self.sweepGroupsByName) do
        local targetZoneID = group:GetZoneIDWhenStageID(activeStageID)
        if targetZoneID then
            local triggerZone = self.database:GetCapZoneForZoneID(targetZoneID)
            if triggerZone then
                if group:GetState() == "ReadyOnTheRamp" then
                    group:SendToZone(triggerZone, targetZoneID, airbase)
                end
            else
                self.logger:debug("SweepGroup " .. group:GetName() .. " has no trigger zone for stage " .. activeStageID)
                group:SendRTB(airbase)
            end
        end
    end
end

function CapBase:CheckAndScheduleIntercept()

    self.logger:debug("Check intercept taskings for airbase " .. self.airbaseName)

    local interceptZoneIDs = {}

    local interceptZoneIDs = {}

    local airbase = Airbase.getByName(self.airbaseName)
    if not airbase then
        return nil
    end

    for name, group in pairs(self.interceptGroupsByName) do
        local targetZoneID = group:GetZoneIDWhenStageID(tostring(self.activeStage))
        if targetZoneID then
           interceptZoneIDs[targetZoneID] = true
        end
    end

    ---@type table<string, Array<string>>
    local unitsToInterceptPerZone = {}

    local detectedUnits = self.detectionManager:GetDetectedUnitsBy(coalition.side.RED)
    for targetZoneID, _ in pairs(interceptZoneIDs) do
        local zones = self.database:GetInterceptZonesForZoneID(targetZoneID)
        if zones then
            for _, zone in pairs(zones) do

                self.logger:debug("Check intercept zone " .. zone.name .. " for airbase " .. self.airbaseName)

                for _, unitName in pairs(detectedUnits) do
                    self.logger:debug("Check unit " .. unitName .. " for intercept in zone " .. zone.name)

                    local unit = Unit.getByName(unitName)
                    if unit and unit:isExist() then
                        local unitPos = unit:getPoint()
                        if Spearhead.Util.is3dPointInZone(unitPos, zone) == true then
                            if not unitsToInterceptPerZone[zone.name] then
                                unitsToInterceptPerZone[zone.name] = {}
                            end

                            table.insert(unitsToInterceptPerZone[zone.name], unitName)
                        end
                    end
                end
            end
        end
    end
    
    ---RATIO. Amount of enemy fighters required per zone before another group gets added.
    local ratio = 4 -- Ratio of units to intercept per zone, can be adjusted

    for name, targets in pairs(unitsToInterceptPerZone) do
        local required = 0
        local nrTargets = Spearhead.Util.tableLength(targets)
        if targets and nrTargets > 0 then
            required = math.ceil(nrTargets / ratio)
        end

        local total = 0
        for _, group in pairs(self.interceptGroupsByName) do
            if group:GetState() == "OnStation" and group:GetCurrentTargetZone() == name then
                group:SetTargetUnits(targets)
                total = total + 1
            end
        end

        if total < required then
            for _, group in pairs(self.interceptGroupsByName) do
                if total < required then
                    local zoneID = group:GetZoneIDWhenStageID(tostring(self.activeStage))
                    if group:GetState() == "ReadyOnTheRamp" then
                        group:SendToInterceptUnits(targets, name, airbase)
                        total = total + 1

                        self.logger:debug("Intercept group " .. group:GetName() .. " sent to intercept zone " .. name )
                    elseif group:GetState() == "InTransit" or group:GetState() == "OnStation" then
                        group:SetTargetUnits(targets)
                    end
                end
            end
        end
    end

end
function CapBase:OnStageNumberChanged(number)
    self.activeStage = number

    if self:IsBaseActiveWhenStageIsActive(number) == true then
        for _, mission in pairs(self.runwayStrikeMissions) do
            mission:SpawnActive()
        end
    end
    self:SpawnIfApplicable()
end

---@param stageNumber number
---@return boolean
function CapBase:IsBaseActiveWhenStageIsActive(stageNumber)
    for _, group in pairs(self.capGroupsByName) do
        local target = group:GetZoneIDWhenStageID(tostring(stageNumber))
        if group:IsBackup() == false and target ~= nil then
            return true
        end
    end

    for _, group in pairs(self.sweepGroupsByName) do
        local target = group:GetZoneIDWhenStageID(tostring(stageNumber))
        if target ~= nil then
            return true
        end
    end

    for _, group in pairs(self.interceptGroupsByName) do
        local target = group:GetZoneIDWhenStageID(tostring(stageNumber))
        if target ~= nil then
            return true
        end
    end
    return false
end

if not Spearhead then Spearhead = {} end
if not Spearhead.classes then Spearhead.classes = {} end
if not Spearhead.classes.capClasses then Spearhead.classes.capClasses = {} end
Spearhead.classes.capClasses.CapAirbase = CapBase