/*
* Copyright (c) 2022 Shenzhen Kaihong Digital Industry Development Co., Ltd. 
* Licensed under the Apache License, Version 2.0 (the "License"); 
* you may not use this file except in compliance with the License. 
* You may obtain a copy of the License at 
*
* http://www.apache.org/licenses/LICENSE-2.0 
*
* Unless required by applicable law or agreed to in writing, software 
* distributed under the License is distributed on an "AS IS" BASIS, 
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
* See the License for the specific language governing permissions and 
* limitations under the License. 
*/
const re = require("../tools/re");
const { FuncType, NumberIncrease, isEnum, EnumValueType, enumIndex } = require("../tools/common");
const { analyzeParams } = require("./params");
const { analyzeReturn } = require("./return");
const { NapiLog } = require("../tools/NapiLog");
const { randomInt } = require("crypto");
const { print } = require("../tools/tool");

function analyzeSubInterface(data) {
    let body = re.replaceAll(data, "\n", "").split(";")//  # replace(" ", "").
    let result = {
        value: [],
        function: [],
        parentNameList: [],
        childList: [],
        parentList: []
    }
    for (let i in body) {
        let t = body[i]
        while (t.length > 0 && t[0] == ' ')//去除前面的空格
            t = t.substring(1, t.length)
        while (t.length > 0 && t[-1] == ' ')//去除后面的空格
            t = t.substring(0, t.length - 1)
        if (t == "") break//如果t为空直接返回
        let tt = re.match(" *([a-zA-Z0-9_]+) *: *([a-zA-Z_0-9<>,:{}[\\] ]+)", t)
        if (tt) {//变量

            let valueName = re.getReg(t, tt.regs[1])
            let valueType = re.getReg(t, tt.regs[2])
            let index = valueType.indexOf("number")
            while (index !== -1) {
                valueType = valueType.replace("number", "NUMBER_TYPE_" + NumberIncrease.getAndIncrease())
                index = valueType.indexOf("number")
            }
            result.value.push({
                name: valueName,
                type: valueType
            })
        }
    }
    return result
}

function getFuncParaType(v, interfaceName, data) {
    let arrayType = re.match("(Async)*Callback<(Array<([a-zA-Z_0-9]+)>)>", v["type"])
    let parameter = v["type"]
    if (arrayType) {
        parameter = re.getReg(v["type"], arrayType.regs[2])
    }
    if (isEnum(parameter, data)) {
        let index = enumIndex(parameter, data)
        if (data.enum[index].body.enumValueType == EnumValueType.ENUM_VALUE_TYPE_NUMBER) {
            v["type"] = v["type"].replace(parameter, "NUMBER_TYPE_" + NumberIncrease.getAndIncrease())
        } else if (data.enum[index].body.enumValueType == EnumValueType.ENUM_VALUE_TYPE_STRING) {
            v["type"] = v["type"].replace(parameter, "string")
        } else {
            NapiLog.logError("analyzeFunction getFuncParaType is not support this type %s"
                .format(data.enum[index].body.enumValueType));
            return null
        }
    }

    let interfaceType = re.match("{([A-Za-z0-9_]+:[A-Za-z0-9_,]+)([A-Za-z0-9_]+:[A-Za-z0-9_]+)}$", v["type"])
    if (interfaceType) {
        v["type"] = interfaceName
    }

    if (parameter.indexOf("number") >= 0) {
        v["type"] = v["type"].replace("number", "NUMBER_TYPE_" + NumberIncrease.getAndIncrease())
    }
    return v
}

function analyzeFuncNoNameInterface(data, values) {
    values = re.replaceAll(re.replaceAll(values, " ", ""), "\n", "")    
    let interfaceName = ""    
    let matchNoName = "([:{,;a-zA-Z_0-9]*)\\?*(:[A-Za-z0-9_,;]*)?:{([A-Za-z0-9_]+:"+
    "[A-Za-z0-9_,;]+)([A-Za-z0-9_]+:[A-Za-z0-9_]+)}(}|,|;)?$"
    let matchs = re.match(matchNoName, values)
    if (matchs) {
        let st = values.lastIndexOf("{")        
        let end = values.indexOf("}")
        let number = NumberIncrease.getAndIncrease();
        interfaceName = "AUTO_INTERFACE_%s".format(number)
        let interfaceBody = values.substring(st+1, end)
        let typeInterface = "{%s}".format(interfaceBody)
        values = re.replaceAll(values, typeInterface, interfaceName)
        interfaceBody = re.replaceAll(interfaceBody, ",", ";")
        data.interface.push({
            name: interfaceName,
            body: analyzeSubInterface(interfaceBody)
        })
    }

    matchs = re.match(matchNoName, values)    
    if(matchs) {
        let resNoNameInter = analyzeFuncNoNameInterface(data, values)
        values = resNoNameInter.values
    }

    let result = {
        interfaceName: interfaceName,
        values: values
    }
    return result
}

function analyseSubReturn(ret, data) {
    //匿名interface返回值 function fun4(input: string): { read: number; written: number }; 
    ret = re.replaceAll(re.replaceAll(ret, " ", ""), "\n", "")
    let tt = re.match("{([A-Za-z0-9_]+:[A-Za-z0-9_,;]+)([A-Za-z0-9_]+:[A-Za-z0-9_]+)}", ret)
    if (tt) {
        let len = tt.regs.length
        let res = ""
        let interfaceName = ""
        for (let i=1; i<len; i++) {
            let regs1 = re.getReg(ret, tt.regs[i])
            if (regs1 != "}" && regs1 != ",") {
                res += regs1
            }         
        }  

        let number = NumberIncrease.getAndIncrease();
        interfaceName = "AUTO_INTERFACE_%s".format(number)
        let interfaceBody = res        
        ret = interfaceName

        interfaceBody = re.replaceAll(interfaceBody, ",", ";")
        data.interface.push({
            name: interfaceName,
            body: analyzeSubInterface(interfaceBody)
        })
    }
    if (ret.indexOf("number") >= 0) {
        ret = ret.replaceAll("number", "NUMBER_TYPE_" + NumberIncrease.getAndIncrease())
    }
    return ret
}

/**函数解析 */
function analyzeFunction(data, isStatic, name, values, ret) {
    let res = analyzeFuncNoNameInterface(data, values)
    let tmp
    let funcType
    if (res) {
        tmp = analyzeParams(name, res.values)
        values = tmp[0]
        funcType = tmp[1]
    }

    tmp = analyzeReturn(ret)
    ret = tmp[0]
    if (tmp[1]) { // 返回类型为 Promise, 解析成等价的AsyncCallback方法
        funcType = FuncType.ASYNC
        // 将返回值Promise<type>改为AsyncCallback<type>，作为方法的入参
        let paramType = ret.replace("Promise", "AsyncCallback")
        values.push({name: "promise", optional: false, type: paramType})
        ret = "void" // 返回值由Promise改为void，与AsyncCallback接口保持一致
    }
    for (let j in values) {
        let v = values[j]
        v = getFuncParaType(v, res.interfaceName, data)
        if (v == null) {
            NapiLog.logError("analyzeFunction is not support this type %s".format(v));
        }
    }
    ret = analyseSubReturn(ret, data)
    let result = {
        name: name,
        type: funcType,
        value: values,
        ret: ret,
        isStatic: isStatic
    }
    return result
}

module.exports = {
    analyzeFunction,
    analyzeSubInterface,
    getFuncParaType
}