#########################################################################
# This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
# License: AGPLv3 s.t. "Commons Clause" – see LICENSE.md for details
#########################################################################

###
TESTING of user queries specifically involving changefeeds - part 1 -- accounts, file_use, project_log

COPYRIGHT : (c) 2017 SageMath, Inc.
LICENSE   : AGPLv3
###

async  = require('async')
expect = require('expect')

pgtest   = require('./pgtest')
db       = undefined
setup    = (cb) -> (pgtest.setup (err) -> db=pgtest.db; cb(err))
teardown = pgtest.teardown
{create_accounts, create_projects, changefeed_series} = pgtest
misc = require('smc-util/misc')

describe 'test the accounts table changefeed', ->
    @timeout(10000)
    before(setup)
    after(teardown)
    account_id = undefined
    changefeed_id = misc.uuid()

    it 'writes to user accounts table and verify that change automatically appears in changefeed', (done) ->
        async.series([
            (cb) ->
                db.create_account(first_name:"Sage", last_name:"Math", created_by:"1.2.3.4",\
                      email_address:"sage@example.com", password_hash:"blah", cb:\
                      (err, x) -> account_id=x; cb(err))
            (cb) ->
                db.user_query
                    account_id : account_id
                    query      : {accounts:[{account_id:account_id, first_name:null}]}
                    changes    : changefeed_id
                    cb         : changefeed_series([
                        (x, cb) ->
                            db.user_query
                                account_id : account_id
                                query      : {accounts:{account_id:account_id, first_name:'SAGE!'}}
                                cb         : cb
                        (x, cb) ->
                            expect(x).toEqual({ action:'insert', new_val: { account_id:account_id, first_name:'SAGE!'}})
                            db.delete_account(account_id:account_id, cb:cb)
                        (x, cb) ->
                            expect(x).toEqual({ action: 'delete', old_val: { account_id:account_id } })
                            db.user_query_cancel_changefeed(id:changefeed_id, cb:cb)
                        ], cb)
        ], (err) ->
            if err
                done(err)
            else
                done()
        )

describe 'test changefeeds involving the file_use table on one project with one user', ->
    @timeout(10000)
    before(setup)
    after(teardown)

    accounts = []
    projects = []
    it 'create accounts and projects', (done) ->
        async.series([
            (cb) ->
                create_accounts 1, (err, x) -> accounts=x; cb()
            (cb) ->
                create_projects 1, accounts[0], (err, x) -> projects.push(x...); cb(err)
        ], done)

    it 'tests a changefeed on the file_use table for a single project', (done) ->
        id   = misc.uuid()
        t0   = new Date()
        t1   = t2 = undefined
        obj  = {project_id:projects[0], path: 'foo.txt', users:{"#{accounts[0]}":{'read':t0}, last_edited:t0}}
        obj2 = {project_id:projects[0], path: 'foo2.txt', last_edited:new Date()}
        db.user_query
            account_id : accounts[0]
            query      : {file_use:[{id: null, project_id:projects[0], path: null, users: null, last_edited: null}]}
            changes    : id
            cb         : changefeed_series([
                (x, cb) ->
                    expect(x).toEqual({ file_use: [] })  # how it starts
                    db.user_query
                        account_id : accounts[0]
                        query      : {file_use:obj}
                        cb         : cb
                (x, cb) ->
                    obj.id = db.sha1(obj.project_id, obj.path)
                    expect(x).toEqual({action:'insert', new_val: obj })

                    # now mutate it by chatting on it
                    t1 = new Date()
                    db.user_query
                        account_id : accounts[0]
                        query      : {file_use:{project_id:projects[0], path: 'foo.txt', users:{"#{accounts[0]}":{'chat':t1}}}}
                        cb         : cb
                (x, cb) ->
                    # note how chat gets recursively MERGED IN -- not replacing users. (so tricky under the hood to implement...)
                    obj.users["#{accounts[0]}"].chat = t1
                    expect(x.action).toEqual('update');
                    expect(x.new_val.users).toEqual(obj.users)

                    # now mutate it by updating last_edited
                    t2 = new Date()
                    db.user_query
                        account_id : accounts[0]
                        query      : {file_use:{project_id:projects[0], path: 'foo.txt', last_edited:t2}}
                        cb         : cb
                (x, cb) ->
                    obj.last_edited = t2
                    expect(x.action).toEqual('update');
                    expect(x.new_val.last_edited).toEqual(obj.last_edited)

                    # add a second file_use entry
                    db.user_query
                        account_id : accounts[0]
                        query      : {file_use:obj2}
                        cb         : cb

                (x, cb) ->
                    obj2.id = db.sha1(obj2.project_id, obj2.path)
                    expect(x).toEqual({action:'insert', new_val:obj2})

                    # now delete the first entry (not through file_use, but directly)
                    db._query
                        query : "DELETE FROM file_use"
                        where : {'id = $': obj.id}
                        cb    : cb
                (x, cb) ->
                    expect(x).toEqual({action:"delete", old_val:{id:obj.id, project_id:projects[0]}})

                    # and the second
                    db._query
                        query : "DELETE FROM file_use"
                        where : {'id = $': obj2.id}
                        cb    : cb

                (x, cb) ->
                    expect(x).toEqual({action:"delete", old_val:{id:obj2.id, project_id:projects[0]}})

                    db.user_query_cancel_changefeed(id:id, cb:cb)
            ], done)

describe 'test file_use changefeeds with multiple projects', ->
    before(setup)
    after(teardown)

    accounts = []
    projects = []
    it 'create account and projects', (done) ->
        async.series([
            (cb) ->
                create_accounts 2, (err, x) -> accounts=x; cb()
            (cb) ->
                create_projects 2, accounts[0], (err, x) -> projects.push(x...); cb(err)
            (cb) ->
                create_projects 1, accounts[1], (err, x) -> projects.push(x...); cb(err)
        ], done)

    it 'insert into file_use for three separate projects', (done) ->
        id   = misc.uuid()
        t   = [misc.minutes_ago(10), misc.minutes_ago(5), misc.minutes_ago(3)]
        obj  = [
            {project_id:projects[0], path: 'file-in-project0.txt', users:{"#{accounts[0]}":{'read':t[0]}}},
            {project_id:projects[1], path: 'file-in-project1.txt', users:{"#{accounts[0]}":{'chat':t[1]}}},
            {project_id:projects[2], path: 'file-in-project2.txt', users:{"#{accounts[1]}":{'chat':t[2]}}}
        ]
        for x in obj
            x.id = db.sha1(x.project_id, x.path)

        db.user_query
            account_id : accounts[0]
            query      : {file_use:[{id: null, project_id:null, path: null, users: null, last_edited: null}]}
            changes    : id
            cb         : changefeed_series([
                (x, cb) ->
                    expect(x).toEqual({ file_use: [] })  # how it starts
                    db.user_query   # insert first object
                        account_id : accounts[0]
                        query      : {file_use:obj[0]}
                        cb         : cb
                (x, cb) ->
                    expect(x).toEqual({action:'insert', new_val: obj[0]})

                    db.user_query   # insert second object
                        account_id : accounts[0]
                        query      : {file_use:obj[1]}
                        cb         : cb
                (x, cb) ->
                    expect(x).toEqual({action:'insert', new_val: obj[1]})

                    db.user_query   # insert third object, which should NOT trigger change
                        account_id : accounts[1]
                        query      : {file_use:obj[2]}
                        cb         : () =>
                            obj[1].last_edited = new Date()
                            db.user_query   # insert second object again, modified
                                account_id : accounts[0]
                                query      : {file_use:obj[1]}
                                cb         : cb

                (x, cb) ->
                    expect(x.action).toEqual('update');
                    expect(x.new_val.last_edited).toEqual(obj[1].last_edited)
                    cb()
            ], done)

describe 'modifying a single file_use record in various ways', ->
    before(setup)
    after(teardown)

    accounts = []
    projects = []
    it 'create account and projects', (done) ->
        async.series([
            (cb) ->
                # 2 accounts
                create_accounts 2, (err, x) -> accounts=x; cb()
            (cb) ->
                # 1 project with both accounts using it
                create_projects 1, accounts, (err, x) -> projects.push(x...); cb(err)
        ], done)

    it 'insert a file_use entry and modify in various ways', (done) ->
        changefeed_id = misc.uuid()
        time          = new Date()
        obj           = {project_id:projects[0], path: 'file-in-project0.txt', users:{"#{accounts[0]}":{'read':time}}}
        obj.id        = db.sha1(obj.project_id, obj.path)

        db.user_query
            account_id : accounts[0]
            query      : {file_use:[{id: null, project_id:null, path: null, users: null, last_edited: null}]}
            changes    : changefeed_id
            cb         : changefeed_series([
                (x, cb) ->
                    expect(x).toEqual({ file_use: [] })  # how it starts
                    cb()
                    db.user_query(account_id: accounts[0], query: {file_use:obj}, cb: cb)
                (x, cb) ->
                    expect(x).toEqual({action:'insert', new_val: obj})

                    obj.last_edited = new Date()
                    db.user_query(account_id: accounts[0], query: {file_use:obj}, cb: cb)
                (x, cb) ->
                    expect(x.action).toEqual('update');
                    expect(x.new_val.last_edited).toEqual(obj.last_edited)

                    obj.users[accounts[0]].chat = new Date()
                    db.user_query(account_id: accounts[0], query: {file_use:obj}, cb: cb)
                (x, cb) ->
                    expect(x.action).toEqual('update');
                    expect(x.new_val.users).toEqual(obj.users)

                    obj.users[accounts[1]] = {seen: new Date()}
                    db.user_query(account_id: accounts[1], query: {file_use:obj}, cb: cb)
                (x, cb) ->
                    expect(x.action).toEqual('update');
                    expect(x.new_val.users).toEqual(obj.users)

                    obj.users[accounts[0]] = {chat: new Date(), read: new Date()}
                    db.user_query(account_id: accounts[0], query: {file_use:obj}, cb: cb)
                (x, cb) ->
                    expect(x.action).toEqual('update');
                    expect(x.new_val.users).toEqual(obj.users)

                    db._query
                        query : "DELETE FROM file_use"
                        where : {'id = $': obj.id}
                        cb    : cb
                (x, cb) ->
                    expect(x).toEqual({action:"delete", old_val:{id:obj.id, project_id:obj.project_id}})

                    # Cancel the changefeed...
                    db.user_query_cancel_changefeed
                        id : changefeed_id
                        cb : cb
                (x, cb) ->
                    expect(x).toEqual({action:'close'})
                    cb()
            ], done)

describe 'test changefeeds with project_log', ->
    before(setup)
    after(teardown)

    accounts = []
    projects = []
    it 'create accounts and projects', (done) ->
        async.series([
            (cb) ->
                create_accounts 2, (err, x) -> accounts=x; cb()
            (cb) ->
                create_projects 2, accounts[0], (err, x) -> projects.push(x...); cb(err)
            (cb) ->
                create_projects 1, accounts[1], (err, x) -> projects.push(x...); cb(err)
        ], done)

    it 'tests a simple project_log changefeed on a single project', (done) ->
        obj  = {id:misc.uuid(), project_id:projects[0], time:new Date(), account_id:accounts[0], event:{sample:'thing'}}
        changefeed_id = misc.uuid()
        db.user_query
            account_id : accounts[0]
            query      : {project_log:[{id: null, project_id:projects[0], time: null, account_id: null, event: null}]}
            changes    : changefeed_id
            cb         : changefeed_series([
                (x, cb) ->
                    expect(x).toEqual({project_log : [] })  # how it starts
                    db.user_query
                        account_id : accounts[0]
                        query      : {project_log:obj}
                        cb         : cb
                (x, cb) ->
                    expect(x).toEqual({action:'insert', new_val: obj })
                    db.user_query_cancel_changefeed(id : changefeed_id, cb : cb)
                (x, cb) ->
                    # check that the next thing we get is close, not the insert we just made above.
                    expect(x).toEqual({action:'close'})
                    cb()
            ], done)

    it "tests a project_log changefeed on all of a user's project", (done) ->
        obj1  = {id:misc.uuid(), project_id:projects[1], time:new Date(), account_id:accounts[0], event:{stuff:[1,2]}}
        obj2  = {id:misc.uuid(), project_id:projects[2], time:new Date(), account_id:accounts[1], event:{user:1}}
        changefeed_id = misc.uuid()
        db.user_query
            account_id : accounts[0]
            query      : {project_log:[{id: null, project_id:null, time: null, account_id: null, event: null}]}
            changes    : changefeed_id
            cb         : changefeed_series([
                (x, cb) ->
                    expect(x.project_log.length).toEqual(1)  # 1 because of one added in previous test above

                    # insert object in projects[1]
                    db.user_query
                        account_id : accounts[0]
                        query      : {project_log:obj1}
                        cb         : cb
                (x, cb) ->
                    # and see it appear
                    expect(x).toEqual({action:'insert', new_val: obj1 })

                    # insert object in projects[2], which has nothing to do with accounts[0]
                    db.user_query
                        account_id : accounts[1]
                        query      : {project_log:obj2}
                        cb         : (err) ->
                            if err
                                cb(err)
                            else
                                # close the changefeed
                                db.user_query_cancel_changefeed
                                    id : changefeed_id
                                    cb : cb
                (x, cb) ->
                    # check that the next thing we get is close, not the insert we just made above.
                    expect(x).toEqual({action:'close'})
                    cb()
            ], done)

describe 'test time-constrained changefeed on project_log', ->
    before(setup)
    after(teardown)

    accounts = []
    projects = []
    it 'create account and project', (done) ->
        async.series([
            (cb) ->
                create_accounts 1, (err, x) -> accounts=x; cb()
            (cb) ->
                create_projects 1, accounts[0], (err, x) -> projects.push(x...); cb(err)
        ], done)

    it "creates changefeed with time constraint by making two entries, one satisfying the constraint, and one not", (done) ->
        changefeed_id = misc.uuid()
        obj0 = {id:misc.uuid(), project_id:projects[0], time:new Date(), event:{foo:'bar0'}}
        obj1 = {id:misc.uuid(), project_id:projects[0], time:misc.days_ago(2), event:{foo:'bar1'}}
        obj2 = {id:misc.uuid(), project_id:projects[0], time:new Date(), event:{foo:'bar2'}}
        db.user_query
            account_id : accounts[0]
            query      : {project_log:[{id: null, project_id:null, time:{'>=':misc.days_ago(1)}, event: null}]}
            changes    : changefeed_id
            cb         : changefeed_series([
                (x, cb) ->
                    expect(x.project_log.length).toEqual(0)
                    # insert object that satisfies time constraint
                    db.user_query(account_id: accounts[0], query: {project_log:obj0}, cb: cb)
                (x, cb) ->
                    # and see it appear
                    expect(x).toEqual({action:'insert', new_val:obj0})
                    # insert old object that does not satisfy time constraint
                    db.user_query account_id: accounts[0], query: {project_log:obj1}, cb: (err) =>
                        if err
                            cb(err)
                        else
                            # then one that does satisfy constraint
                            db.user_query(account_id: accounts[0], query: {project_log:obj2}, cb: cb)
                (x, cb) ->
                    # see that *only* the new one appears
                    expect(x).toEqual({action:'insert', new_val:obj2})

                    # modify the first obj so its timestamp is old, and see it gets updated to be removed (so only old_val is set)
                    obj3 = misc.deep_copy(obj0)
                    obj3.time = misc.days_ago(60)
                    db.user_query(account_id: accounts[0], query: {project_log:obj3}, cb:cb)
                (x, cb) ->
                    expect(x).toEqual({action:"delete", old_val:misc.copy_without(obj0, 'event')})
                    cb()
            ], done)