--[[
Tencent is pleased to support the open source community by making BK-CI 蓝鲸持续集成平台 available.

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BK-CI 蓝鲸持续集成平台 is licensed under the MIT license.

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Terms of the MIT License:
---------------------------------------------------
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]]

local redis, err = require("resty.redis")
_M = {}

local redisConfig = config.redis

function _M:new()
    if redisConfig == nil then
        ngx.log(ngx.ERR, "redis config is null")
        return nil
    end
    if not redis then
        ngx.log(ngx.ERR, "redis require error:", err)
        return nil
    end
    local red, err = redis:new()
    if not red then
        ngx.log(ngx.ERR, "red new error:", res, err)
        return nil
    end
    red:set_timeout(2000) -- 2 second
    local redis_host = redisConfig['host']
    local redis_port = redisConfig['port']
    if not redis_host or not redis_port then
        ngx.log(ngx.ERR, "redis config is empty")
        return nil
    end
    local res, err = red:connect(redis_host, redis_port, {
        backlog = redisConfig['backlog'],
        ssl = false,
        pool_size = redisConfig['pool_size']
    })
    if not res then
        ngx.log(ngx.ERR, "red connect error:", redis_host, ",", redis_port, " ", err)
        return nil
    end
    if redisConfig['pass'] ~= nil then
        res, err = red:auth(redisConfig['pass'])
        if not res then
            ngx.log(ngx.ERR, "red auth error:", err)
            return nil
        end
    end
    if redisConfig['database'] ~= nil then
        res, err = red:select(redisConfig['database'])
        if not res then
            ngx.log(ngx.ERR, "red select error:", err)
            return nil
        end
    end
    return red
end

return _M