local avoidSavingLastLocations = {}
local moneyLogs = {}

local function removeCharacterFunctions(character)
    local newData = {}
    for k, v in pairs(character) do
        if type(v) ~= "function" then
            newData[k] = v
        end
    end
    return newData
end

local function logMoney(charId, action, account, amount, reason, trace)
    if not trace or (action == "set" and not reason) then return end
    local traceText = trace:match("%((.-)%)")
    traceText = traceText and traceText:gsub("%^%d", "") or traceText or ""
    table.insert(moneyLogs, { charId, action, account, amount, reason or "[NO REASON GIVEN]", traceText })
end

local function createCharacterTable(info)
    local playerInfo = PlayersInfo[info.source] or {}

    local self = {
        id = info.id,
        source = info.source,
        identifier = info.identifier,
        user_id = info.user_id,
        identifiers = playerInfo.identifiers or {},
        discord = playerInfo.discord or {},
        name = info.name,
        firstname = info.firstname,
        lastname = info.lastname,
        fullname = ("%s %s"):format(info.firstname, info.lastname),
        dob = info.dob,
        gender = info.gender,
        cash = info.cash,
        bank = info.bank,
        phonenumber = info.phonenumber,
        groups = info.groups,
        metadata = info.metadata,
        inventory = info.inventory
    }
    
    ---@param account string
    ---@param amount number
    ---@param reason string|nil
    ---@return boolean
    function self.deductMoney(account, amount, reason)
        local amount = tonumber(amount)
        if not amount or amount <= 0 or account ~= "bank" and account ~= "cash" then return end
        self[account] -= amount
        if NDCore.players[self.source] then
            self.triggerEvent("ND:updateMoney", self.cash, self.bank)
            TriggerEvent("ND:moneyChange", self.source, account, amount, "remove", reason)
        end

        logMoney(self.id, "deduct", account, amount, reason, Citizen.InvokeNative(`FORMAT_STACK_TRACE` & 0xFFFFFFFF, nil, 0, Citizen.ResultAsString()))

        return true
    end
    
    ---@param account string
    ---@param amount number
    ---@param reason string|nil
    ---@return boolean
    function self.addMoney(account, amount, reason)
        local amount = tonumber(amount)
        if not amount or amount <= 0 or account ~= "bank" and account ~= "cash" then return end
        self[account] += amount
        if NDCore.players[self.source] then
            self.triggerEvent("ND:updateMoney", self.cash, self.bank)
            TriggerEvent("ND:moneyChange", self.source, account, amount, "add", reason)
        end

        logMoney(self.id, "add", account, amount, reason, Citizen.InvokeNative(`FORMAT_STACK_TRACE` & 0xFFFFFFFF, nil, 0, Citizen.ResultAsString()))

        return true
    end

    ---@param amount number
    ---@return boolean
    function self.depositMoney(amount)
        local amount = tonumber(amount)
        if not amount or self.cash < amount or amount <= 0 then return end
        return self.deductMoney("cash", amount, locale("deposit")) and self.addMoney("bank", amount, locale("deposit"))
    end
    
    ---@param amount number
    ---@return boolean
    function self.withdrawMoney(amount)
        local amount = tonumber(amount)
        if not amount or self.bank < amount or amount <= 0 then return end
        return self.deductMoney("bank", amount, locale("withdraw")) and self.addMoney("cash", amount, locale("withdraw"))
    end

    ---@param data string
    ---@return any
    function self.getData(data)
        return self[data]
    end

    ---@param metadata string|table
    ---@return any
    function self.getMetadata(metadata)
        if type(metadata) ~= "table" then
            return self.metadata[metadata]
        end
        local returnData = {}
        for i=1, #metadata do
            local data = metadata[i]
            returnData[data] = self.metadata[data]
        end
        return returnData
    end

    ---@param key string|table
    ---@param value any
    function self.setData(key, value, reason)
        if type(key) == "table" then
            for k, v in pairs(key) do
                self[k] = v
                if k == "cash" or k == "bank" then
                    logMoney(self.id, "set", k, value, reason, Citizen.InvokeNative(`FORMAT_STACK_TRACE` & 0xFFFFFFFF, nil, 0, Citizen.ResultAsString()))
                    TriggerEvent("ND:moneyChange", self.source, k, v, "set", reason)
                end
            end
        else
            self[key] = value
            if key == "cash" or key == "bank" then
                logMoney(self.id, "set", key, value, reason, Citizen.InvokeNative(`FORMAT_STACK_TRACE` & 0xFFFFFFFF, nil, 0, Citizen.ResultAsString()))
                TriggerEvent("ND:moneyChange", self.source, key, value, "set", reason)
            end
        end
        self.triggerEvent("ND:updateCharacter", removeCharacterFunctions(self), key)
        TriggerEvent("ND:updateCharacter", self, key)
    end
    
    ---@param key string|table
    ---@param value any
    ---@return table
    function self.setMetadata(key, value)
        if type(key) == "table" then
            for k, v in pairs(key) do
                self.metadata[k] = v
            end
        else
            self.metadata[key] = value
        end
        self.triggerEvent("ND:updateCharacter", removeCharacterFunctions(self), "metadata")
        TriggerEvent("ND:updateCharacter", self, "metadata")
        return self.metadata
    end

    -- Mark character deleted
    function self.delete()
        local result = MySQL.update.await("UPDATE nd_characters SET deleted_at = NOW() WHERE charid = ?", {self.id})
        if result and NDCore.players[self.source] then
            NDCore.players[self.source] = nil
        end
        return result
    end

    --save last location
    function self.saveLastLocation()
        local ped = GetPlayerPed(self.source)
        if not ped or ped == 0 then return end

        local coords = GetEntityCoords(ped)
        local heading = GetEntityHeading(ped)
        local saveLocation = true

        for i=1, #avoidSavingLastLocations do
            local loc = avoidSavingLastLocations[i]
            if #(loc.coords-coords) < loc.dist then
                saveLocation = false
            end
        end

        if not saveLocation then return end

        self.setMetadata("location", {
            x = coords.x,
            y = coords.y,
            z = coords.z,
            w = heading
        })

        return true
    end
    
    -- Unload and save character
    function self.unload()
        if not NDCore.players[self.source] then return end

        for name, _ in pairs(self.groups) do
            lib.removePrincipal(self.source, ("group.%s"):format(name))
        end

        self.saveLastLocation()
        self.triggerEvent("ND:characterUnloaded")
        TriggerEvent("ND:characterUnloaded", self.source, self)

        local saved = self.save()
        NDCore.players[self.source] = nil

        return saved
    end
    
    -- Save character information to database
    function self.save(key)
        if key then
            local charData = self[key]
            if not charData or type(charData) == "function" then
                return lib.print.error(key, "Is not valid character data.")
            end

            if type(charData) == "table" then
                charData = json.encode(charData)
            end

            local query = ("UPDATE nd_characters SET `%s` = ? WHERE charid = ?"):format(key)
            local affectedRows = MySQL.update.await(query, {charData, self.id})
            return affectedRows > 0
        end

        local affectedRows = MySQL.update.await("UPDATE nd_characters SET user_id = ?, name = ?, firstname = ?, lastname = ?, dob = ?, gender = ?, cash = ?, bank = ?, phonenumber = ?, `groups` = ?, metadata = ? WHERE charid = ?", {
            self.user_id,
            self.name,
            self.firstname,
            self.lastname,
            self.dob,
            self.gender,
            self.cash,
            self.bank,
            self.phonenumber,
            json.encode(self.groups),
            json.encode(self.metadata),
            self.id
        })
        return affectedRows > 0
    end
    
    ---Create a license/permit for the character
    ---@param licenseType string
    ---@param expire number
    function self.createLicense(licenseType, expire)
        local expireIn = tonumber(expire) or 2592000
        local time = os.time()
        local licenses = self.metadata.licenses
        local identifier = {}
    
        for i=1, 16 do
            identifier[i] = math.random(0, 1) == 1 and string.char(math.random(65, 90)) or math.random(0, 9)
        end
    
        local license = {
            type = licenseType,
            status = "valid",
            issued = time,
            expires = time+expireIn,
            identifier = table.concat(identifier)
        }
    
        if licenses then
            local found = false

            for i=1, #licenses do
                if licenses[i].type == licenseType then
                    self.metadata.licenses[i] = license
                    found = true
                    break
                end
            end

            if not found then
                self.metadata.licenses[#licenses+1] = license
            end
        else
            self.metadata.licenses = {license}
        end
        self.triggerEvent("ND:updateCharacter", removeCharacterFunctions(self), "metadata")
        TriggerEvent("ND:updateCharacter", self, "metadata")
    end

    function self.getLicense(identifier)
        local licenses = self.metadata.licenses or {}
        for i=1, #licenses do
            local data = licenses[i]
            if data.identifier == identifier then
                return data, i
            end
        end
    end

    function self.updateLicense(identifier, newData)
        local data, i = self.getLicense(identifier)
        if not data then return end
        for k, v in pairs(newData) do
            data[k] = v
        end
        self.save()
    end
    
    ---@param coords vector3|vector4
    ---@return boolean
    function self.setCoords(coords)
        if not self.source or not coords then return end
        local ped = GetPlayerPed(self.source)
        if not DoesEntityExist(ped) then return end
        SetEntityCoords(ped, coords.x, coords.y, coords.z)
        if coords.w then
            SetEntityHeading(ped, coords.w)
        end
        return true
    end

    ---@param eventName string
    ---@param ... any
    ---@return boolean
    function self.triggerEvent(eventName, ...)
        if not self.source then return end
        TriggerClientEvent(eventName, self.source, ...)
        return true
    end
    
    function self.notify(...)
        if not self.source then return end
        TriggerClientEvent("ox_lib:notify", self.source, ...)
        return true
    end

    function self.revive()
        self.triggerEvent("ND:revivePlayer")
        self.setMetadata({
            dead = false,
            deathInfo = false,
        })
    end

    ---@param reason string
    function self.drop(reason)
        if not self.source then return end
        DropPlayer(self.source, reason)
    end

    -- Set the character as the players active character/currently playing character
    function self.active()
        local char = NDCore.players[self.source]
        if char and char.id == self.id then return end
        if char then char.unload() end
        for identifierType, identifier in pairs(self.identifiers) do
            if lib.table.contains(Config.admins, ("%s:%s"):format(identifierType, identifier)) then
                self.addGroup("admin")
            end
        end

        local roles = self.discord.roles
        if roles then
            local hasAdmin = false
            for i=1, #Config.adminDiscordRoles do
                local role = Config.adminDiscordRoles[i]
                if lib.table.contains(roles, role) then
                    hasAdmin = true
                    break
                end
            end

            if hasAdmin then
                self.addGroup("admin")
            elseif self.groups["admin"] then
                self.removeGroup("admin")
            end
            
            local function hasRole(groupRoles)
                for i=1, #groupRoles do
                    local role = groupRoles[i]
                    if lib.table.contains(roles, role) then
                        return true
                    end
                end
            end

            for group, groupRoles in pairs(Config.groupRoles) do
                if hasRole(groupRoles) then
                    self.addGroup(group)
                elseif self.groups[group] then
                    self.removeGroup(group)
                end
            end
        end

        for name, _ in pairs(self.groups) do
            lib.addPrincipal(self.source, ("group.%s"):format(name))
        end
        NDCore.players[self.source] = self
        TriggerEvent("ND:characterLoaded", self)
        self.triggerEvent("ND:characterLoaded", removeCharacterFunctions(self))
    end

    ---@param name string
    ---@param rank number
    ---@param isJob boolean
    ---@return boolean
    function self.addGroup(name, rank, customGroup, isJob)
        local groupRank = tonumber(rank) or 1
        local groupInfo = lib.table.deepclone(Config.groups?[name] or {})
        local bossRank = groupInfo?.minimumBossRank

        for k, v in pairs(customGroup or {}) do
            groupInfo[k] = v
        end

        if isJob then
            for _, group in pairs(self.groups) do
                group.isJob = nil
            end
        end

        self.groups[name] = {
            name = name,
            label = groupInfo?.label or name,
            rankName = groupInfo?.ranks?[groupRank] or groupRank,
            rank = groupRank,
            isJob = isJob,
            isBoss = bossRank and groupRank >= bossRank,
            metadata = groupInfo.metadata or {}
        }
        
        if not isJob then
            self.triggerEvent("ND:updateCharacter", removeCharacterFunctions(self), "groups")
            TriggerEvent("ND:updateCharacter", self, "groups")
        end

        TriggerEvent("ND:groupAdded", self, self.groups[name])
        lib.addPrincipal(self.source, ("group.%s"):format(name))
        return self.groups[name]
    end

    ---@param name string
    ---@return table
    function self.getGroup(name)
        return self.groups[name]
    end

    ---@param name string
    function self.removeGroup(name)
        local group = self.groups[name]
        if not group then return end

        if self.job == name then
            self.job = nil
            self.jobInfo = nil
        end

        self.groups[name] = nil
        self.triggerEvent("ND:updateCharacter", removeCharacterFunctions(self), "groups")
        TriggerEvent("ND:updateCharacter", self, "groups")
        TriggerEvent("ND:groupRemoved", self, group)
        lib.removePrincipal(self.source, ("group.%s"):format(name))
        return group
    end

    ---@param name string
    ---@param rank number
    ---@return boolean
    function self.setJob(name, rank, customGroup, keepGroup)
        if not keepGroup then
            self.removeGroup(self.job)
        end

        local job = self.addGroup(name, rank, customGroup, true)

        if job then
            self.job = job.name
            self.jobInfo = job
        end
        
        self.triggerEvent("ND:updateCharacter", removeCharacterFunctions(self), "job")
        TriggerEvent("ND:updateCharacter", self, "job")
        return job
    end

    ---@param job string
    ---@return boolean
    function self.getJob()
        for name, group in pairs(self.groups) do
            if group.isJob then
                return name, group
            end
        end
    end

    local jobName, jobInfo = self.getJob()
    if jobInfo then
        self.job = jobName
        self.jobInfo = jobInfo
    end
    
    return self
end

function NDCore.avoidSavingLocation(coords, dist)
    avoidSavingLastLocations[#avoidSavingLastLocations+1] = { coords = coords, dist = dist}
end

function NDCore.validateCharacterData(charInfo)
    local errors = {}

    local function checkLength(field, value, maxLength)
        if type(value) ~= "string" then return end
        if #value > maxLength then
            table.insert(errors, string.format("%s is too long (max %d, got %d)", field, maxLength, #value))
        end
    end

    if charInfo.name then checkLength("game name", charInfo.name, 50) end
    if charInfo.firstname then checkLength("firstname", charInfo.firstname, 50) end
    if charInfo.lastname then checkLength("lastname", charInfo.lastname, 50) end
    if charInfo.dob then checkLength("dob", charInfo.dob, 50) end
    if charInfo.gender then checkLength("gender", charInfo.gender, 50) end
    if type(charInfo.cash) ~= "number" then table.insert(errors, "cash must be a number") end
    if type(charInfo.bank) ~= "number" then table.insert(errors, "bank must be a number") end

    if #errors > 0 then
        return false, errors
    else
        return true, {}
    end
end

---@param src number
---@param info table
---@return table
function NDCore.newCharacter(src, info)
    local identifier = NDCore.getPlayerIdentifierByType(src, Config.characterIdentifier)
    if not identifier then return end
    
    local userId = PlayersInfo[src] and PlayersInfo[src].userId

    local charInfo = {
        source = src,
        identifier = identifier,
        user_id = userId,
        name = GetPlayerName(src) or "",
        firstname = info.firstname or "",
        lastname = info.lastname or "",
        dob = info.dob or "",
        gender = info.gender or "",
        cash = info.cash or 0,
        bank = info.bank or 0,
        phonenumber = info.phonenumber,
        groups = info.groups or {},
        metadata = info.metadata or {},
        inventory = info.inventory or {}
    }

    local valid, issues = NDCore.validateCharacterData(charInfo)
    if not valid then
        for _, err in ipairs(issues) do
            Wait(100)
            TriggerClientEvent("ND:notifyClient", src, {
                description = err,
                type = "error"
            })
        end
        return
    end

    charInfo.id = MySQL.insert.await("INSERT INTO nd_characters (identifier, user_id, name, firstname, lastname, dob, gender, cash, bank, phonenumber, `groups`, metadata, inventory) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)", {
        identifier,
        userId,
        charInfo.name,
        charInfo.firstname,
        charInfo.lastname,
        charInfo.dob,
        charInfo.gender,
        charInfo.cash,
        charInfo.bank,
        charInfo.phonenumber,
        json.encode(charInfo.groups),
        json.encode(charInfo.metadata),
        json.encode(charInfo.inventory)
    })

    return createCharacterTable(charInfo)
end

---@param id number
---@return table
function NDCore.fetchCharacter(id, src)
    local result
    if src then
        local identifier = NDCore.getPlayerIdentifierByType(src, Config.characterIdentifier)
        local userId = PlayersInfo[src] and PlayersInfo[src].userId
        result = MySQL.query.await("SELECT * FROM nd_characters WHERE charid = ? AND (identifier = ? OR user_id = ?)", {id, identifier, userId})
    else
        result = MySQL.query.await("SELECT * FROM nd_characters WHERE charid = ?", {id})
    end

    local info = result?[1]
    if not info then return end
    
    -- Check if character has user_id, if not assign it
    if not info.user_id and src then
        local userId = PlayersInfo[src] and PlayersInfo[src].userId
        if userId then
            MySQL.update.await("UPDATE nd_characters SET user_id = ? WHERE charid = ?", {userId, info.charid})
            info.user_id = userId
        end
    end
    
    return createCharacterTable({
        source = src,
        id = info.charid,
        identifier = info.identifier,
        user_id = info.user_id,
        name = info.name,
        firstname = info.firstname,
        lastname = info.lastname,
        dob = info.dob,
        gender = info.gender,
        cash = info.cash,
        bank = info.bank,
        phonenumber = info.phonenumber,
        groups = json.decode(info.groups),
        metadata = json.decode(info.metadata),
        inventory = json.decode(info.inventory)
    })
end

---@param src number
---@return table
function NDCore.fetchAllCharacters(src)
    local userId = PlayersInfo[src] and PlayersInfo[src].userId
    local identifier = NDCore.getPlayerIdentifierByType(src, Config.characterIdentifier)
    local characters = {}
    
    -- Query by either identifier OR user_id, excluding deleted characters
    local result = MySQL.query.await("SELECT * FROM nd_characters WHERE (identifier = ? OR user_id = ?) AND deleted_at IS NULL", {identifier, userId})

    for i=1, #result do
        local info = result[i]
        
        -- Check if character has user_id, if not assign it
        if not info.user_id and userId then
            MySQL.update.await("UPDATE nd_characters SET user_id = ? WHERE charid = ?", {userId, info.charid})
            info.user_id = userId
        end
        
        characters[info.charid] = createCharacterTable({
            source = src,
            id = info.charid,
            identifier = info.identifier,
            user_id = info.user_id,
            name = info.name,
            firstname = info.firstname,
            lastname = info.lastname,
            dob = info.dob,
            gender = info.gender,
            cash = info.cash,
            bank = info.bank,
            phonenumber = info.phonenumber,
            groups = json.decode(info.groups),
            metadata = json.decode(info.metadata),
            inventory = json.decode(info.inventory)
        })
    end
    return characters
end

---@param src number
---@param id number
---@return table
function NDCore.setActiveCharacter(src, id)
    local char = NDCore.players[src]
    if not src or char and char.id == id then return end

    local character = NDCore.fetchCharacter(id, src)
    if not character then return end
    
    character.name = GetPlayerName(src)
    character.active()
    return character
end

-- runs every 10 minutes, saves all characters and money logs.
lib.cron.new("*/10 * * * *", function()
    local players = NDCore.getPlayers()
    for _, player in pairs(players) do
        player.saveLastLocation()
        player.save()
    end

    if #moneyLogs == 0 then return end

    local placeholders = {}
    local params = {}
    local logs = moneyLogs
    moneyLogs = {}

    for i=1, #logs do
        local row = logs[i]
        for j = 1, 6 do
            table.insert(params, row[j])
        end
        table.insert(placeholders, "(?, ?, ?, ?, ?, ?)")
    end

    local query = "INSERT INTO nd_money_log (character_id, action, account, amount, reason, trace) VALUES " .. table.concat(placeholders, ",")
    MySQL.prepare(query, params)
end)