local util      = require 'utility'
local guide     = require 'parser.guide'
local collector = require 'core.collector'
local files     = require 'files'

local SPLIT_CHAR     = '\x1F'
local LAST_REGEX     = SPLIT_CHAR .. '[^' .. SPLIT_CHAR .. ']*$'
local FIRST_REGEX    = '^[^' .. SPLIT_CHAR .. ']*'
local HEAD_REGEX    = '^' .. SPLIT_CHAR .. '?[^' .. SPLIT_CHAR .. ']*'
local ANY_FIELD_CHAR = '*'
local INDEX_CHAR     = '['
local RETURN_INDEX   = SPLIT_CHAR .. '#'
local PARAM_INDEX    = SPLIT_CHAR .. '&'
local TABLE_KEY      = SPLIT_CHAR .. '<'
local WEAK_TABLE_KEY = SPLIT_CHAR .. '<<'
local INDEX_FIELD    = SPLIT_CHAR .. INDEX_CHAR
local ANY_FIELD      = SPLIT_CHAR .. ANY_FIELD_CHAR
local WEAK_ANY_FIELD = SPLIT_CHAR .. ANY_FIELD_CHAR .. ANY_FIELD_CHAR
local URI_CHAR       = '@'
local URI_REGEX      = URI_CHAR .. '([^' .. URI_CHAR .. ']*)' .. URI_CHAR .. '(.*)'

---@class node
-- 当前节点的id
---@field id     string
-- 使用该ID的单元
---@field source parser.guide.object
-- 使用该ID的单元
---@field sources parser.guide.object[]
-- 前进的关联ID
---@field forward string
-- 第一个前进关联的tag
---@field finfo? node.info
-- 前进的关联ID
---@field forwards string[]
-- 后退的关联ID
---@field backward string
-- 第一个后退关联的tag
---@field binfo? node.info
-- 后退的关联ID
---@field backwards string[]
-- 函数调用参数信息（用于泛型）
---@field call parser.guide.object
---@field skip boolean

---@alias noders table<string, node[]>
---@alias node.filter fun(id: string, field?: string):boolean

---@class node.info
---@field reject?      string
---@field deep?        boolean
---@field filter?      node.filter
---@field filterValid? node.filter
---@field dontCross?   boolean

---创建source的链接信息
---@param noders noders
---@param id string
---@return node
local function getNode(noders, id)
    if not noders[id] then
        noders[id] = {
            id = id,
        }
    end
    return noders[id]
end

---如果对象是 arg self, 则认为 id 是 method 的 node
---@param source parser.guide.object
---@return nil
local function getMethodNode(source)
    if source.type ~= 'local' or source[1] ~= 'self' then
        return nil
    end
    if source._mnode ~= nil then
        return source._mnode or nil
    end
    source._mnode = false
    local func = guide.getParentFunction(source)
    if func.isGeneric then
        return
    end
    if source.parent.type ~= 'funcargs' then
        return
    end
    local setmethod = func.parent
    if setmethod and ( setmethod.type == 'setmethod'
                    or setmethod.type == 'setfield'
                    or setmethod.type == 'setindex') then
        source._mnode = setmethod.node
        return setmethod.node
    end
end

---获取语法树单元的key
---@param source parser.guide.object
---@return string? key
---@return parser.guide.object? node
local function getKey(source)
    if     source.type == 'local' then
        if source.parent.type == 'funcargs' then
            return 'p:' .. source.start, nil
        end
        return 'l:' .. source.start, nil
    elseif source.type == 'setlocal'
    or     source.type == 'getlocal' then
        return getKey(source.node)
    elseif source.type == 'setglobal'
    or     source.type == 'getglobal' then
        local node = source.node
        if node.tag == '_ENV' then
            return ('%q'):format(source[1] or ''), nil
        else
            return ('%q'):format(source[1] or ''), node
        end
    elseif source.type == 'getfield'
    or     source.type == 'setfield' then
        return ('%q'):format(source.field and source.field[1] or ''), source.node
    elseif source.type == 'tablefield' then
        return ('%q'):format(source.field and source.field[1] or ''), source.parent
    elseif source.type == 'getmethod'
    or     source.type == 'setmethod' then
        return ('%q'):format(source.method and source.method[1] or ''), source.node
    elseif source.type == 'setindex'
    or     source.type == 'getindex' then
        local index = source.index
        if not index then
            return INDEX_CHAR, source.node
        end
        if index.type == 'string'
        or index.type == 'boolean'
        or index.type == 'integer'
        or index.type == 'number' then
            return ('%q'):format(index[1] or ''), source.node
        else
            return INDEX_CHAR, source.node
        end
    elseif source.type == 'tableindex' then
        local index = source.index
        if not index then
            return ANY_FIELD_CHAR, source.parent
        end
        if index.type == 'string'
        or index.type == 'boolean'
        or index.type == 'integer'
        or index.type == 'number' then
            return ('%q'):format(index[1] or ''), source.parent
        elseif index.type ~= 'function'
        and    index.type ~= 'table' then
            return ANY_FIELD_CHAR, source.parent
        end
    elseif source.type == 'tableexp' then
        return tostring(source.tindex), source.parent
    elseif source.type == 'table' then
        return 't:' .. source.start, nil
    elseif source.type == 'label' then
        return 'l:' .. source.start, nil
    elseif source.type == 'goto' then
        if source.node then
            return 'l:' .. source.node.start, nil
        end
        return nil, nil
    elseif source.type == 'function' then
        return 'f:' .. source.start, nil
    elseif source.type == 'string' then
        return 'str:', nil
    elseif source.type == 'integer' then
        return 'int:'
    elseif source.type == 'number' then
        return 'num:'
    elseif source.type == 'boolean' then
        return 'bool:'
    elseif source.type == 'nil' then
        return 'nil:', nil
    elseif source.type == '...' then
        return 'va:' .. source.start, nil
    elseif source.type == 'varargs' then
        if source.node then
            return 'va:' .. source.node.start, nil
        end
    elseif source.type == 'select' then
        return ('s:%d%s%d'):format(source.start, RETURN_INDEX, source.sindex)
    elseif source.type == 'call' then
        local node = source.node
        if node.special == 'rawget'
        or node.special == 'rawset' then
            if not source.args then
                return nil, nil
            end
            local tbl, key = source.args[1], source.args[2]
            if not tbl or not key then
                return nil, nil
            end
            if key.type == 'string' then
                return ('%q'):format(key[1] or ''), tbl
            else
                return '', tbl
            end
        end
        return 'c:' .. source.finish, nil
    elseif source.type == 'doc.class.name'
    or     source.type == 'doc.alias.name'
    or     source.type == 'doc.extends.name' then
        local name = source[1]
        return 'dn:' .. name, nil
    elseif source.type == 'doc.type.name' then
        local name = source[1]
        if source.typeGeneric then
            return 'dg:' .. source.typeGeneric[name][1].start, nil
        else
            return 'dn:' .. name, nil
        end
    elseif source.type == 'doc.see.name' then
        local name = source[1]
        return 'dsn:' .. name, nil
    elseif source.type == 'doc.class' then
        return 'dc:' .. source.start
    elseif source.type == 'doc.type' then
        return 'dt:' .. source.start
    elseif source.type == 'doc.param' then
        return 'dp:' .. source.start
    elseif source.type == 'doc.vararg' then
        return 'dv:' .. source.start
    elseif source.type == 'doc.field.name' then
        return 'dfn:' .. source.start
    elseif source.type == 'doc.type.enum'
    or     source.type == 'doc.resume' then
        return 'de:' .. source.start
    elseif source.type == 'doc.type.table' then
        return 'dtable:' .. source.start
    elseif source.type == 'doc.type.ltable' then
        return 'dltable:' .. source.start
    elseif source.type == 'doc.type.field' then
        return 'dfield:' .. source.start
    elseif source.type == 'doc.type.array' then
        return 'darray:' .. source.finish
    elseif source.type == 'doc.type.function' then
        return 'dfun:' .. source.start, nil
    elseif source.type == 'doc.see.field' then
        return ('%q'):format(source[1]), source.parent.name
    elseif source.type == 'generic.closure' then
        return 'gc:' .. source.call.start, nil
    elseif source.type == 'generic.value' then
        local tail = ''
        if guide.getUri(source.closure.call) ~= guide.getUri(source.proto) then
            tail = URI_CHAR .. guide.getUri(source.closure.call)
        end
        return ('gv:%s|%s%s'):format(
            source.closure.call.start,
            getKey(source.proto),
            tail
        )
    end
    return nil, nil
end

local function getNodeKey(source)
    if source.type == 'getlocal'
    or source.type == 'setlocal' then
        source = source.node
    end
    local methodNode = getMethodNode(source)
    if methodNode then
        return getNodeKey(methodNode)
    end
    local key, node = getKey(source)
    if key and guide.isGlobal(source) then
        return 'g:' .. key, nil
    end
    return key, node
end

local IDList = {}
---获取语法树单元的字符串ID
---@param source parser.guide.object
---@return string? id
local function getID(source)
    if not source then
        return nil
    end
    if source._id ~= nil then
        return source._id or nil
    end
    if source.type == 'field'
    or source.type == 'method' then
        source._id = false
        return nil
    end
    local current = source
    local index = 0
    while true do
        if current.type == 'paren' then
            current = current.exp
            if not current then
                return nil
            end
            goto CONTINUE
        end
        local id, node = getNodeKey(current)
        if not id then
            break
        end
        index = index + 1
        IDList[index] = id
        if not node then
            break
        end
        current = node
        ::CONTINUE::
    end
    if index == 0 then
        source._id = false
        return nil
    end
    for i = index + 1, #IDList do
        IDList[i] = nil
    end
    util.revertTable(IDList)
    local id = table.concat(IDList, SPLIT_CHAR)
    source._id = id
    return id
end

---添加关联的前进ID
---@param noders    noders
---@param id        string
---@param forwardID string
---@param info?     node.info
local function pushForward(noders, id, forwardID, info)
    if not id
    or not forwardID
    or forwardID == ''
    or id == forwardID then
        return
    end
    local node = getNode(noders, id)
    if not node.forward then
        node.forward = forwardID
        node.finfo   = info
        return
    end
    if node.forward == forwardID then
        return
    end
    if not node.forwards then
        node.forwards = {}
    end
    if node.forwards[forwardID] ~= nil then
        return
    end
    node.forwards[forwardID] = info or false
    node.forwards[#node.forwards+1] = forwardID
end

---添加关联的后退ID
---@param noders     noders
---@param id         string
---@param backwardID string
---@param info?      node.info
local function pushBackward(noders, id, backwardID, info)
    if not id
    or not backwardID
    or backwardID == ''
    or id == backwardID then
        return
    end
    local node = getNode(noders, id)
    if not node.backward then
        node.backward = backwardID
        node.binfo    = info
        return
    end
    if node.backward == backwardID then
        return
    end
    if not node.backwards then
        node.backwards = {}
    end
    if node.backwards[backwardID] ~= nil then
        return
    end
    node.backwards[backwardID] = info or false
    node.backwards[#node.backwards+1] = backwardID
end

---@class noder
local m = {}

m.SPLIT_CHAR     = SPLIT_CHAR
m.RETURN_INDEX   = RETURN_INDEX
m.PARAM_INDEX    = PARAM_INDEX
m.TABLE_KEY      = TABLE_KEY
m.ANY_FIELD      = ANY_FIELD
m.URI_CHAR       = URI_CHAR
m.INDEX_FIELD    = INDEX_FIELD
m.WEAK_TABLE_KEY = WEAK_TABLE_KEY
m.WEAK_ANY_FIELD = WEAK_ANY_FIELD

--- 寻找doc的主体
---@param obj parser.guide.object
---@return parser.guide.object
local function getDocStateWithoutCrossFunction(obj)
    for _ = 1, 1000 do
        local parent = obj.parent
        if not parent then
            return obj
        end
        if parent.type == 'doc' then
            return obj
        end
        if parent.type == 'doc.type.function' then
            return nil
        end
        obj = parent
    end
    error('guide.getDocState overstack')
end

---添加关联单元
---@param noders noders
---@param source parser.guide.object
function m.pushSource(noders, source, id)
    id = id or m.getID(source)
    if not id then
        return
    end
    if id == 'str:'
    or id == 'nil:'
    or id == 'num:'
    or id == 'int:'
    or id == 'bool:' then
        return
    end
    local node = getNode(noders, id)
    if not node.source then
        node.source = source
        return
    end
    if not node.sources then
        node.sources = {}
    end
    node.sources[#node.sources+1] = source
end

local DUMMY_FUNCTION = function () end

---遍历关联单元
---@param node node
---@return fun():parser.guide.object
function m.eachSource(node)
    if not node.source then
        return DUMMY_FUNCTION
    end
    local index
    local sources = node.sources
    return function ()
        if not index then
            index = 0
            return node.source
        end
        if not sources then
            return nil
        end
        index = index + 1
        return sources[index]
    end
end

---遍历forward
---@param node node
---@return fun():string, string
function m.eachForward(node)
    if not node.forward then
        return DUMMY_FUNCTION
    end
    local index
    local forwards = node.forwards
    return function ()
        if not index then
            index = 0
            return node.forward, node.finfo
        end
        if not forwards then
            return nil
        end
        index = index + 1
        local id  = forwards[index]
        local tag = forwards[id]
        return id, tag
    end
end

---遍历backward
---@param node node
---@return fun():string, node.info
function m.eachBackward(node)
    if not node.backward then
        return DUMMY_FUNCTION
    end
    local index
    local backwards = node.backwards
    return function ()
        if not index then
            index = 0
            return node.backward, node.binfo
        end
        if not backwards then
            return nil
        end
        index = index + 1
        local id  = backwards[index]
        local tag = backwards[id]
        return id, tag
    end
end

local function bindValue(noders, source, id)
    local value = source.value
    if not value then
        return
    end
    local valueID = getID(value)
    if not valueID then
        return
    end
    if source.type == 'getlocal'
    or source.type == 'setlocal' then
        source = source.node
    end
    if source.bindDocs and value.type ~= 'table' then
        for _, doc in ipairs(source.bindDocs) do
            if doc.type == 'doc.class'
            or doc.type == 'doc.type' then
                return
            end
        end
    end
    -- x = y : x -> y
    pushForward(noders, id, valueID, {
        reject = 'set',
    })
    -- 参数/call禁止反向查找赋值
    local valueType = valueID:match '^(.-:).'
    if not valueType then
        return
    end
    if  valueType ~= 'p:'
    and valueType ~= 's:'
    and valueType ~= 'c:' then
        pushBackward(noders, valueID, id, {
            reject = 'set',
        })
    else
        pushBackward(noders, valueID, id, {
            reject = 'set',
            deep   = true,
        })
    end
end

local function compileCallParam(noders, call, sourceID)
    if not sourceID then
        return
    end
    if not call.args then
        return
    end
    local node = call.node
    local fixIndex = 0
    if call.node.special == 'pcall' then
        fixIndex = 1
        node = call.args[1]
    elseif call.node.special == 'xpcall' then
        fixIndex = 2
        node = call.args[1]
    end
    local nodeID = getID(node)
    if not nodeID then
        return
    end
    for firstIndex, callArg in ipairs(call.args) do
        firstIndex = firstIndex - fixIndex
        if firstIndex > 0 and callArg.type == 'function' then
            if callArg.args then
                for secondIndex, funcParam in ipairs(callArg.args) do
                    local paramID = ('%s%s%s%s%s'):format(
                        nodeID,
                        PARAM_INDEX,
                        firstIndex,
                        PARAM_INDEX,
                        secondIndex
                    )
                    pushForward(noders, getID(funcParam), paramID)
                end
            end
        end
    end
end

local function compileCallReturn(noders, call, sourceID, returnIndex)
    if not sourceID then
        return
    end
    local node = call.node
    local nodeID = getID(node)
    if not nodeID then
        return
    end
    local callID = getID(call)
    if not callID then
        return
    end
    -- 将setmetatable映射到 param1 以及 param2.__index 上
    if node.special == 'setmetatable' then
        local tblID  = getID(call.args and call.args[1])
        local metaID = getID(call.args and call.args[2])
        local indexID
        if metaID then
            indexID = ('%s%s%q'):format(
                metaID,
                SPLIT_CHAR,
                '__index'
            )
        end
        pushForward(noders, sourceID, tblID)
        pushForward(noders, sourceID, indexID, {
            filter = function (id, field)
                if field then
                    return true
                end
                return id:sub(1, 2) ~= 'f:'
            end,
            filterValid = function (id, field)
                return not field
            end
        })
        pushBackward(noders, tblID, sourceID)
        --pushBackward(noders, indexID, callID)
        return
    end
    if node.special == 'require' then
        local arg1 = call.args and call.args[1]
        if arg1 and arg1.type == 'string' then
            getNode(noders, sourceID).require = arg1[1]
        end
        pushBackward(noders, callID, sourceID, {
            deep = true,
        })
        return
    end
    if node.special == 'pcall'
    or node.special == 'xpcall' then
        local index = returnIndex - 1
        if index <= 0 then
            return
        end
        local funcID = call.args and getID(call.args[1])
        if not funcID then
            return
        end
        local pfuncXID = ('%s%s%s'):format(
            funcID,
            RETURN_INDEX,
            index
        )
        pushForward(noders, sourceID, pfuncXID)
        pushBackward(noders, pfuncXID, sourceID, {
            deep = true,
        })
        return
    end
    local funcXID = ('%s%s%s'):format(
        nodeID,
        RETURN_INDEX,
        returnIndex
    )
    getNode(noders, sourceID).call = call
    pushForward(noders, sourceID, funcXID)
    pushBackward(noders, funcXID, sourceID, {
        deep = true,
    })
end

function m.compileDocValue(noders, tp, id, source)
    if tp == 'doc.type' then
        if source.bindSources then
            for _, src in ipairs(source.bindSources) do
                pushForward(noders, getID(src), id)
                pushForward(noders, id, getID(src))
            end
        end
        for _, enumUnit in ipairs(source.enums) do
            pushForward(noders, id, getID(enumUnit))
        end
        for _, resumeUnit in ipairs(source.resumes) do
            pushForward(noders, id, getID(resumeUnit))
        end
        for _, typeUnit in ipairs(source.types) do
            local unitID = getID(typeUnit)
            pushForward(noders, id, unitID)
            if source.bindSources then
                for _, src in ipairs(source.bindSources) do
                    pushBackward(noders, unitID, getID(src))
                end
            end
        end
    end
    if tp == 'doc.type.table' then
        if source.tkey then
            local keyID = ('%s%s'):format(
                id,
                TABLE_KEY
            )
            pushForward(noders, keyID, getID(source.tkey))
        end
        if source.tvalue then
            local valueID = ('%s%s'):format(
                id,
                ANY_FIELD
            )
            pushForward(noders, valueID, getID(source.tvalue))
        end
    end
    if tp == 'doc.type.ltable' then
        local firstField = source.fields[1]
        if not firstField then
            return
        end
        local keyID = ('%s%s'):format(
            id,
            WEAK_TABLE_KEY
        )
        local valueID = ('%s%s'):format(
            id,
            WEAK_ANY_FIELD
        )
        pushForward(noders, keyID, 'dn:string')
        pushForward(noders, valueID, getID(firstField.extends))
        for _, field in ipairs(source.fields) do
            local extendsID = ('%s%s%q'):format(
                id,
                SPLIT_CHAR,
                field.name[1]
            )
            pushForward(noders, extendsID, getID(field))
            pushForward(noders, extendsID, getID(field.extends))
        end
    end
    if tp == 'doc.type.array' then
        if source.node then
            local nodeID = ('%s%s'):format(
                id,
                ANY_FIELD
            )
            pushForward(noders, nodeID, getID(source.node))
        end
        local keyID = ('%s%s'):format(
            id,
            TABLE_KEY
        )
        pushForward(noders, keyID, 'dn:integer')
    end
end

---@param noders noders
---@param source parser.guide.object
---@return parser.guide.object[]
function m.compileNode(noders, source)
    local id = getID(source)
    bindValue(noders, source, id)
    if source.special == 'setmetatable'
    or source.special == 'require'
    or source.special == 'dofile'
    or source.special == 'loadfile'
    or source.special == 'rawset'
    or source.special == 'rawget' then
        local node = getNode(noders, id)
        node.skip = true
    end
    if source.type == 'string' then
        pushForward(noders, id, 'str:')
    end
    if source.type == 'boolean' then
        pushForward(noders, id, 'dn:boolean')
    end
    if source.type == 'number' then
        pushForward(noders, id, 'dn:number')
    end
    if source.type == 'integer' then
        pushForward(noders, id, 'dn:integer')
    end
    if source.type == 'nil' then
        pushForward(noders, id, 'dn:nil')
    end
    -- self -> mt:xx
    if source.type == 'local' and source[1] == 'self' then
        local func = guide.getParentFunction(source)
        if func.isGeneric then
            return
        end
        if source.parent.type ~= 'funcargs' then
            return
        end
        local setmethod = func.parent
        -- guess `self`
        if setmethod and ( setmethod.type == 'setmethod'
                        or setmethod.type == 'setfield'
                        or setmethod.type == 'setindex') then
            pushForward(noders, id, getID(setmethod.node))
            pushBackward(noders, getID(setmethod.node), id, {
                deep = true,
            })
        end
    end
    -- 分解 @type
    --if source.type == 'doc.type' then
    --    if source.bindSources then
    --        for _, src in ipairs(source.bindSources) do
    --            pushForward(noders, getID(src), id)
    --            pushForward(noders, id, getID(src))
    --        end
    --    end
    --    for _, enumUnit in ipairs(source.enums) do
    --        pushForward(noders, id, getID(enumUnit))
    --    end
    --    for _, resumeUnit in ipairs(source.resumes) do
    --        pushForward(noders, id, getID(resumeUnit))
    --    end
    --    for _, typeUnit in ipairs(source.types) do
    --        local unitID = getID(typeUnit)
    --        pushForward(noders, id, unitID)
    --        if source.bindSources then
    --            for _, src in ipairs(source.bindSources) do
    --                pushBackward(noders, unitID, getID(src))
    --            end
    --        end
    --    end
    --end
    -- 分解 @alias
    if source.type == 'doc.alias' then
        pushForward(noders, getID(source.alias), getID(source.extends))
    end
    -- 分解 @class
    if source.type == 'doc.class' then
        pushForward(noders, id, getID(source.class))
        pushForward(noders, getID(source.class), id)
        if source.extends then
            for _, ext in ipairs(source.extends) do
                pushBackward(noders, id, getID(ext))
            end
        end
        if source.bindSources then
            for _, src in ipairs(source.bindSources) do
                pushForward(noders, getID(src), id)
                pushForward(noders, id, getID(src))
            end
        end
        for _, field in ipairs(source.fields) do
            local key = field.field[1]
            if key then
                local keyID = ('%s%s%q'):format(
                    id,
                    SPLIT_CHAR,
                    key
                )
                pushForward(noders, keyID, getID(field.field))
                pushForward(noders, getID(field.field), keyID)
                pushForward(noders, keyID, getID(field.extends))
                pushBackward(noders, getID(field.extends), keyID)
            end
        end
    end
    if source.type == 'doc.param' then
        pushForward(noders, id, getID(source.extends))
        for _, src in ipairs(source.bindSources) do
            if src.type == 'local' and src.parent.type == 'in' then
                pushForward(noders, getID(src), id)
            end
        end
    end
    if source.type == 'doc.vararg' then
        pushForward(noders, getID(source), getID(source.vararg))
    end
    if source.type == 'doc.see' then
        local nameID  = getID(source.name)
        local classID = nameID:gsub('^dsn:', 'dn:')
        pushForward(noders, nameID, classID)
        if source.field then
            local fieldID      = getID(source.field)
            local fieldClassID = fieldID:gsub('^dsn:', 'dn:')
            pushForward(noders, fieldID, fieldClassID)
        end
    end
    m.compileDocValue(noders, source.type, id, source)
    if source.type == 'call' then
        if source.parent.type ~= 'select' then
            compileCallReturn(noders, source, id, 1)
        end
        compileCallParam(noders, source, id)
    end
    if source.type == 'select' then
        if source.vararg.type == 'call' then
            local call = source.vararg
            compileCallReturn(noders, call, id, source.sindex)
        end
        if source.vararg.type == 'varargs' then
            pushForward(noders, id, getID(source.vararg))
        end
    end
    if source.type == 'doc.type.function' then
        if source.returns then
            for index, rtn in ipairs(source.returns) do
                local returnID = ('%s%s%s'):format(
                    id,
                    RETURN_INDEX,
                    index
                )
                pushForward(noders, returnID, getID(rtn))
            end
            for index, param in ipairs(source.args) do
                local paramID = ('%s%s%s'):format(
                    id,
                    PARAM_INDEX,
                    index
                )
                pushForward(noders, paramID, getID(param.extends))
            end
        end
        -- @type fun(x: T):T 的情况
        local docType = getDocStateWithoutCrossFunction(source)
        if docType and docType.type == 'doc.type' then
            guide.eachSourceType(source, 'doc.type.name', function (typeName)
                if typeName.typeGeneric then
                    source.isGeneric = true
                    return false
                end
            end)
        end
    end
    if source.type == 'doc.type.name' then
        local uri = guide.getUri(source)
        collector.subscribe(uri, id, getNode(noders, id))
    end
    if source.type == 'doc.class.name'
    or source.type == 'doc.alias.name' then
        local uri = guide.getUri(source)
        collector.subscribe(uri, id, getNode(noders, id))

        local defID = 'def:' .. id
        collector.subscribe(uri, defID, getNode(noders, defID))
        m.pushSource(noders, source, defID)

        local defAnyID = 'def:dn:'
        collector.subscribe(uri, defAnyID, getNode(noders, defAnyID))
        m.pushSource(noders, source, defAnyID)
    end
    if id and id:sub(1, 2) == 'g:' then
        local uri = guide.getUri(source)
        collector.subscribe(uri, id, getNode(noders, id))
        if guide.isSet(source) then

            local defID = 'def:' .. id
            collector.subscribe(uri, defID, getNode(noders, defID))
            m.pushSource(noders, source, defID)

            if guide.isGlobal(source) then
                local defAnyID = 'def:g:'
                collector.subscribe(uri, defAnyID, getNode(noders, defAnyID))
                m.pushSource(noders, source, defAnyID)
            end
        end
    end
    -- 将函数的返回值映射到具体的返回值上
    if source.type == 'function' then
        local hasDocReturn = {}
        -- 检查 luadoc
        if source.bindDocs then
            for _, doc in ipairs(source.bindDocs) do
                if doc.type == 'doc.return' then
                    for _, rtn in ipairs(doc.returns) do
                        local fullID = ('%s%s%s'):format(
                            id,
                            RETURN_INDEX,
                            rtn.returnIndex
                        )
                        pushForward(noders, fullID, getID(rtn))
                        for _, typeUnit in ipairs(rtn.types) do
                            pushBackward(noders, getID(typeUnit), fullID, {
                                deep      = true,
                                dontCross = true,
                            })
                        end
                        hasDocReturn[rtn.returnIndex] = true
                    end
                end
                if doc.type == 'doc.param' then
                    local paramName = doc.param[1]
                    if source.docParamMap then
                        local paramIndex = source.docParamMap[paramName]
                        local param = source.args[paramIndex]
                        if param then
                            pushForward(noders, getID(param), getID(doc))
                            param.docParam = doc
                            local paramID = ('%s%s%s'):format(
                                id,
                                PARAM_INDEX,
                                paramIndex
                            )
                            pushForward(noders, paramID, getID(doc.extends))
                        end
                    end
                end
                if doc.type == 'doc.vararg' then
                    if source.args then
                        for _, param in ipairs(source.args) do
                            if param.type == '...' then
                                pushForward(noders, getID(param), getID(doc))
                            end
                        end
                    end
                end
                if doc.type == 'doc.generic' then
                    source.isGeneric = true
                end
                if doc.type == 'doc.overload' then
                    pushForward(noders, id, getID(doc.overload))
                end
            end
        end
        -- 检查实体返回值
        if source.returns then
            local returns = {}
            for _, rtn in ipairs(source.returns) do
                for index, rtnObj in ipairs(rtn) do
                    if not hasDocReturn[index] then
                        if not returns[index] then
                            returns[index] = {}
                        end
                        returns[index][#returns[index]+1] = rtnObj
                    end
                end
            end
            for index, rtnObjs in ipairs(returns) do
                local returnID = ('%s%s%s'):format(
                    id,
                    RETURN_INDEX,
                    index
                )
                for _, rtnObj in ipairs(rtnObjs) do
                    pushForward(noders, returnID, getID(rtnObj))
                    pushBackward(noders, getID(rtnObj), returnID, {
                        deep      = true,
                        dontCross = true,
                    })
                end
            end
        end
    end
    if source.type == 'table' then
        local firstField = source[1]
        if firstField then
            if firstField.type == 'varargs' then
                local keyID = ('%s%s'):format(
                    id,
                    TABLE_KEY
                )
                local valueID = ('%s%s'):format(
                    id,
                    ANY_FIELD
                )
                source.array = firstField
                pushForward(noders, keyID, 'dn:integer')
                pushForward(noders, valueID, getID(firstField))
            else
                local keyID = ('%s%s'):format(
                    id,
                    WEAK_TABLE_KEY
                )
                local valueID = ('%s%s'):format(
                    id,
                    WEAK_ANY_FIELD
                )
                if firstField.type == 'tablefield' then
                    pushForward(noders, keyID, 'dn:string')
                    pushForward(noders, valueID, getID(firstField.value))
                elseif firstField.type == 'tableindex' then
                    pushForward(noders, keyID,   getID(firstField.index))
                    pushForward(noders, valueID, getID(firstField.value))
                elseif firstField.type == 'tableexp' then
                    pushForward(noders, keyID,   'dn:integer')
                    pushForward(noders, valueID, getID(firstField))
                end
            end
        end
    end
    if source.type == 'main' then
        if source.returns then
            for _, rtn in ipairs(source.returns) do
                local rtnObj = rtn[1]
                if rtnObj then
                    pushForward(noders, 'mainreturn', getID(rtnObj))
                    pushBackward(noders, getID(rtnObj), 'mainreturn', {
                        deep = true,
                    })
                end
            end
        end
    end
    if source.type == 'generic.closure' then
        for i, rtn in ipairs(source.returns) do
            local closureID = ('%s%s%s'):format(
                id,
                RETURN_INDEX,
                i
            )
            local returnID = getID(rtn)
            pushForward(noders, closureID, returnID)
        end
    end
    if source.type == 'generic.value' then
        local proto    = source.proto
        local closure  = source.closure
        local upvalues = closure.upvalues
        if proto.type == 'doc.type.name' then
            local key = proto[1]
            if upvalues[key] then
                for _, paramID in ipairs(upvalues[key]) do
                    pushForward(noders, id, paramID)
                    pushBackward(noders, paramID, id)
                end
            end
        end
        --if proto.type == 'doc.type' then
        --    for _, tp in ipairs(source.types) do
        --        pushForward(noders, id, getID(tp))
        --        pushBackward(noders, getID(tp), id)
        --    end
        --end
        m.compileDocValue(noders, proto.type, id, source)
    end
end

---根据ID来获取所有的node
---@param root parser.guide.object
---@param id string
---@return node?
function m.getNodeByID(root, id)
    root = guide.getRoot(root)
    local noders = root._noders
    if not noders then
        return nil
    end
    return noders[id]
end

---根据ID来获取第一个节点的ID
---@param id string
---@return string
function m.getFirstID(id)
    local firstID, count = id:match(FIRST_REGEX)
    if count == 0 then
        return nil
    end
    if firstID == '' then
        return nil
    end
    return firstID
end

---根据ID来获取第一个节点的ID或field
---@param id string
---@return string
function m.getHeadID(id)
    local headID, count = id:match(HEAD_REGEX)
    if count == 0 then
        return nil
    end
    if headID == '' then
        return nil
    end
    return headID
end

---根据ID来获取上个节点的ID
---@param id string
---@return string
function m.getLastID(id)
    local lastID, count = id:gsub(LAST_REGEX, '')
    if count == 0 then
        return nil
    end
    if lastID == '' then
        return nil
    end
    return lastID
end

---获取ID的长度
---@param id string
---@return integer
function m.getIDLength(id)
    if not id then
        return 0
    end
    local _, count = id:gsub(SPLIT_CHAR, SPLIT_CHAR)
    return count + 1
end

---测试id是否包含field，如果遇到函数调用则中断
---@param id string
---@return boolean
function m.hasField(id)
    local firstID = m.getFirstID(id)
    if firstID == id or not firstID then
        return false
    end
    local nextChar = id:sub(#firstID + 1, #firstID + 1)
    if nextChar ~= SPLIT_CHAR then
        return false
    end
    local next2Char = id:sub(#firstID + 2, #firstID + 2)
    if next2Char == RETURN_INDEX
    or next2Char == PARAM_INDEX then
        return false
    end
    return true
end

---把形如 `@file:\\\XXXXX@gv:1|1`拆分成uri与id
---@param id string
---@return uri? string
---@return string id
function m.getUriAndID(id)
    local uri, newID = id:match(URI_REGEX)
    return uri, newID
end

---是否是普通的field，例如数字或字符串，而不是函数返回值等
---@param field any
function m.isCommonField(field)
    if not field then
        return false
    end
    if field:sub(1, #RETURN_INDEX) == RETURN_INDEX then
        return false
    end
    if field:sub(1, #PARAM_INDEX) == PARAM_INDEX then
        return false
    end
    return true
end

---获取source的ID
---@param source parser.guide.object
---@return string
function m.getID(source)
    return getID(source)
end

---获取source的key
---@param source parser.guide.object
---@return string
function m.getKey(source)
    return getKey(source)
end

---清除临时id（用于泛型的临时对象）
---@param root parser.guide.object
---@param id string
function m.removeID(root, id)
    if not id then
        return
    end
    root = guide.getRoot(root)
    local noders = root._noders
    noders[id] = nil
end

---寻找doc的主体
---@param doc parser.guide.object
function m.getDocState(doc)
    return getDocStateWithoutCrossFunction(doc)
end

---获取对象的noders
---@param source parser.guide.object
---@return noders
function m.getNoders(source)
    local root = guide.getRoot(source)
    if not root._noders then
        root._noders = {}
    end
    return root._noders
end

---编译整个文件的node
---@param  source parser.guide.object
---@return table
function m.compileNodes(source)
    local root = guide.getRoot(source)
    local noders = m.getNoders(source)
    if next(noders) then
        return noders
    end
    log.debug('compileNodes:', guide.getUri(root))
    collector.dropUri(guide.getUri(root))
    guide.eachSource(root, function (src)
        m.pushSource(noders, src)
        m.compileNode(noders, src)
    end)
    log.debug('compileNodes finish:', guide.getUri(root))
    return noders
end

files.watch(function (ev, uri)
    uri = files.asKey(uri)
    if ev == 'update' then
        local state = files.getState(uri)
        if state then
            m.compileNodes(state.ast)
        end
    end
    if ev == 'remove' then
        collector.dropUri(uri)
    end
end)

return m