---
--- Generated by EmmyLua(https://github.com/EmmyLua)
--- Created by .
--- DateTime: 2025/9/25 08:19
--- 业务逻辑 对用户数据表进行数据表业务处理
local cjson = require('cjson')
local pgmoon = require('pgmoon')
local dbconf = require("config.database")
local status = require("config.status")
local snowflake = require("util.snowflake")

local _M = {}

--获取一个数据库操作连接
local function get_con(cfg)
    local code = 0
    -- 创建一个新的连接
    local conn = pgmoon.new(cfg);
    ---- 连接到数据库
    local ok, err = conn:connect()
    if not ok then
        print("Connection failed: " .. err)
        code = 0x000002
    end
    --ngx.say("Connection success")
    return code,conn
end

local function getUuid()
    local workerId = 0 -- 假设当前机器的ID是1，范围在[0, 31]之间
    local datacenterId = 0 -- 数据中心ID，范围在[0, 31]之间
    local snow = snowflake.new(workerId, datacenterId)
    local id = snow:generateUniqueId()-- 生成ID
    --print("Generated ID:",  snow.int64_to_string(id))
    return snow.int64_to_string(id)
end

--数据库执行sql语句
local function execSQL(sql)
    local res = nil
    if sql == '' or sql == nil then
        return 0x000003,res
    end
    --获取数据库连接
    local code,conn = get_con(dbconf.postgres)
    if code ~= 0 then
        return 0x000003,res
    end
    --执行数据库操作
    res = conn:query(sql)
    if not res then
        print("query sql failed: "..sql)
        return 0x000003,res
    end
    --关闭数据库
    conn:disconnect()
    return code,res
end

--校验json数据的正确性，并返回json解析后的数据
local function checkJson(jsonData)
    local success, result = pcall(function()
        return cjson.decode(jsonData)
    end)
    if success == true then
        return true, result
    end
    local res = nil
    return false,res
end

--通过查询条件判断数据库中的数据记录
local function checkUserExist(where)
    --组装sql语句
    local sql = string.format("select count(*) as count from \"tbl_users\" %s", where)
    print("check sql: "..sql)
    --获取数据库连接
    return execSQL(sql)
end

-- 查询数据表中的所有用户信息
function _M.getAllUser()
    --组装sql语句
    local sql = "select * from \"tbl_users\""
    return execSQL(sql)
end

--根据用户id获取用户信息
function _M.getUser(id)
    --组装sql语句
    local sql = "select * from \"tbl_users\" where id='"..id.."'"
    return execSQL(sql)
end

--增加用户信息到数据表
function _M.addUser(jsonData)
    --验证数据的正确性，错误时返回
    local success, result = checkJson(jsonData)
    if success == false then
        return 0x000001,result
    end
    --解析json中的键和数据值
    local keys = ""
    local values = ""
    local username, phone, email
    for key, value in pairs(result) do
        keys = keys..key..","
        values = values..((type(value) == "string") and "'"..value.."'" or value)..","
        if key == "username" then username = value end
        if key == "phone" then phone = value end
        if key == "email" then email = value end
    end
    --根据用户、手机号、邮箱进行验证用户是否存在
    local where = string.format("where username='%s' or phone='%s' or email='%s'", username, phone, email)
    local ok, res = checkUserExist(where)
    if ok ~= 0 then
        return 0x000001,res
    end
    local num = 0
    for _, row in ipairs(res) do
        for key, value in pairs(row) do
            num = value
        end
    end
    print("exec result:", num)
    if num > 0 then
        return 0x010000,nil
    end
    --自己增加对应的uuid数据值
    local newKeys = keys.."id"
    local newValues = values.."'"..getUuid().."'"
    --组装sql语句
    local sql = string.format("insert into \"tbl_users\"(%s)values(%s)", newKeys, newValues)
    return execSQL(sql)
end

--增加用户信息到数据表
function _M.delete_user(id)
    --组装sql语句
    local sql = "delete from \"tbl_users\" where id='"..id.."'"
    return execSQL(sql)
end

--更新用户信息到数据表
function _M.update_user(id, jsonData)
    --根据用户id进行验证用户是否存在
    local where = string.format("where id='%s'", id)
    local ok, res = checkUserExist(where)
    if ok ~= 0 then
        return 0x000001,res
    end
    local num = 0
    for _, row in ipairs(res) do
        for key, value in pairs(row) do
            num = value
        end
    end
    print("exec result:", num)
    if num <= 0 then
        return 0x01000C,nil
    end
    --验证数据的正确性，错误时返回
    local success, result = checkJson(jsonData)
    if success == false then
        return 0x000001,result
    end
    --解析json中的键和数据值
    local tmp = ""
    for key, value in pairs(result) do
        local val = (type(value) == "string") and "'"..value.."'" or value
        tmp = string.format("%s=%s,", key, val)
    end
    local vals = tmp:sub(1, #tmp - 1)
    --组装sql语句
    local sql = string.format("update \"tbl_users\" set %s where id='%s'", vals, id)
    return execSQL(sql)
end

return _M