agents

%% subgoal_decomposition_engine.erl
%% Advanced subgoal setting and decomposition with recursive planning
%% Sophisticated gen_statem for goal-oriented task breakdown
-module(subgoal_decomposition_engine).
-behaviour(gen_statem).

-export([
    start_link/1,
    set_primary_goal/2,
    decompose_goal/2,
    create_subgoal/3,
    link_subgoals/3,
    validate_goal_hierarchy/1,
    optimize_goal_sequence/1,
    track_goal_progress/1,
    adapt_goals/2,
    merge_goal_branches/2,
    goal_conflict_resolution/2
]).

-export([init/1, callback_mode/0, terminate/3]).
-export([
    idle/3,
    goal_analysis/3,
    decomposition/3,
    subgoal_creation/3,
    dependency_mapping/3,
    optimization/3,
    validation/3,
    execution_planning/3,
    monitoring/3,
    adaptation/3
]).

-record(goal_data, {
    session_id,
    primary_goal,
    goal_hierarchy = #{},
    subgoal_network = #{},
    dependency_graph = #{},
    execution_sequence = [],
    progress_tracking = #{},
    optimization_history = [],
    adaptation_rules = #{},
    conflict_resolution_stack = [],
    cognitive_model = #{},
    meta_reasoning_depth = 0,
    goal_satisfaction_criteria = #{}
}).

-record(goal_node, {
    goal_id,
    parent_goal_id,
    goal_description,
    goal_type, % primary, intermediate, leaf, meta
    decomposition_strategy, % sequential, parallel, conditional, iterative
    subgoal_ids = [],
    prerequisite_goals = [],
    success_criteria = #{},
    failure_conditions = #{},
    resource_requirements = #{},
    estimated_effort = medium,
    priority_level = normal,
    temporal_constraints = #{},
    contextual_dependencies = [],
    optimization_metadata = #{},
    progress_state = not_started, % not_started, in_progress, completed, failed, suspended
    completion_percentage = 0.0,
    learning_annotations = []
}).

-record(goal_relationship, {
    relationship_id,
    source_goal_id,
    target_goal_id,
    relationship_type, % prerequisite, enables, conflicts, supports, alternative
    strength = 1.0,
    temporal_ordering = undefined,
    conditional_logic = undefined,
    constraint_parameters = #{},
    dynamic_weight = 1.0
}).

-record(decomposition_strategy, {
    strategy_id,
    strategy_type, % hierarchical, temporal, resource_based, risk_minimizing
    decomposition_rules = [],
    optimization_criteria = [],
    adaptation_triggers = [],
    meta_cognitive_parameters = #{},
    learning_integration = enabled
}).

%% Public API

start_link(SessionConfig) ->
    gen_statem:start_link(?MODULE, SessionConfig, []).

set_primary_goal(EnginePid, GoalSpec) ->
    gen_statem:call(EnginePid, {set_primary_goal, GoalSpec}).

decompose_goal(EnginePid, GoalId) ->
    gen_statem:call(EnginePid, {decompose_goal, GoalId}).

create_subgoal(EnginePid, ParentGoalId, SubgoalSpec) ->
    gen_statem:call(EnginePid, {create_subgoal, ParentGoalId, SubgoalSpec}).

link_subgoals(EnginePid, SourceGoalId, TargetGoalId) ->
    gen_statem:call(EnginePid, {link_subgoals, SourceGoalId, TargetGoalId}).

validate_goal_hierarchy(EnginePid) ->
    gen_statem:call(EnginePid, validate_hierarchy).

optimize_goal_sequence(EnginePid) ->
    gen_statem:call(EnginePid, optimize_sequence).

track_goal_progress(EnginePid) ->
    gen_statem:call(EnginePid, track_progress).

adapt_goals(EnginePid, AdaptationTrigger) ->
    gen_statem:call(EnginePid, {adapt_goals, AdaptationTrigger}).

merge_goal_branches(EnginePid, BranchIds) ->
    gen_statem:call(EnginePid, {merge_branches, BranchIds}).

goal_conflict_resolution(EnginePid, ConflictData) ->
    gen_statem:call(EnginePid, {resolve_conflicts, ConflictData}).

%% Gen_statem callbacks

init(SessionConfig) ->
    SessionId = generate_session_id(),
    
    Data = #goal_data{
        session_id = SessionId,
        adaptation_rules = maps:get(adaptation_rules, SessionConfig, #{}),
        cognitive_model = initialize_cognitive_model(),
        meta_reasoning_depth = maps:get(meta_reasoning_depth, SessionConfig, 3),
        goal_satisfaction_criteria = maps:get(satisfaction_criteria, SessionConfig, #{})
    },
    
    {ok, idle, Data}.

callback_mode() ->
    state_functions.

%% State: idle - Waiting for primary goal setting
idle({call, From}, {set_primary_goal, GoalSpec}, Data) ->
    % Set primary goal and initialize hierarchy
    PrimaryGoalId = generate_goal_id(),
    PrimaryGoal = create_goal_node(PrimaryGoalId, undefined, GoalSpec, primary),
    
    NewData = Data#goal_data{
        primary_goal = PrimaryGoal,
        goal_hierarchy = #{PrimaryGoalId => PrimaryGoal},
        progress_tracking = #{PrimaryGoalId => initialize_progress_tracking()}
    },
    
    {next_state, goal_analysis, NewData, [{reply, From, {ok, PrimaryGoalId}}]};

idle({call, From}, _Request, _Data) ->
    {keep_state_and_data, [{reply, From, {error, no_primary_goal}}]};

idle(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, idle).

%% State: goal_analysis - Analyzing primary goal complexity and requirements
goal_analysis(enter, _OldState, Data) ->
    % Analyze primary goal for decomposition strategy
    PrimaryGoal = Data#goal_data.primary_goal,
    spawn(fun() ->
        Analysis = analyze_goal_complexity(PrimaryGoal, Data),
        gen_statem:cast(self(), {analysis_complete, Analysis})
    end),
    {keep_state_and_data, [{state_timeout, 7000, analysis_timeout}]};

goal_analysis(cast, {analysis_complete, Analysis}, Data) ->
    % Goal analysis complete, determine decomposition approach
    case maps:get(requires_decomposition, Analysis, false) of
        true ->
            % Goal requires decomposition
            AnalyzedData = store_goal_analysis(Analysis, Data),
            {next_state, decomposition, AnalyzedData};
        false ->
            % Goal is atomic, proceed to execution planning
            AtomicData = mark_goal_as_atomic(Analysis, Data),
            {next_state, execution_planning, AtomicData}
    end;

goal_analysis(state_timeout, analysis_timeout, Data) ->
    % Analysis timeout, assume decomposition needed
    {next_state, decomposition, Data};

goal_analysis(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, goal_analysis).

%% State: decomposition - Breaking down goals into subgoals
decomposition(enter, _OldState, Data) ->
    % Start goal decomposition process
    PrimaryGoal = Data#goal_data.primary_goal,
    spawn(fun() ->
        DecompositionResult = perform_goal_decomposition(PrimaryGoal, Data),
        gen_statem:cast(self(), {decomposition_complete, DecompositionResult})
    end),
    {keep_state_and_data, [{state_timeout, 12000, decomposition_timeout}]};

decomposition(cast, {decomposition_complete, DecompositionResult}, Data) ->
    case DecompositionResult of
        {success, SubgoalHierarchy, RelationshipGraph} ->
            % Decomposition successful
            NewData = Data#goal_data{
                goal_hierarchy = merge_goal_hierarchies(SubgoalHierarchy, Data#goal_data.goal_hierarchy),
                subgoal_network = RelationshipGraph
            },
            {next_state, subgoal_creation, NewData};
        {partial, PartialHierarchy, UnresolvedGoals} ->
            % Partial decomposition, handle unresolved goals
            PartialData = handle_partial_decomposition(PartialHierarchy, UnresolvedGoals, Data),
            {next_state, subgoal_creation, PartialData};
        {failure, DecompositionError} ->
            % Decomposition failed, try alternative strategy
            case try_alternative_decomposition_strategy(DecompositionError, Data) of
                {alternative, AlternativeData} ->
                    {repeat_state, AlternativeData};
                {no_alternative, ErrorData} ->
                    {next_state, execution_planning, ErrorData}
            end
    end;

decomposition({call, From}, {decompose_goal, GoalId}, Data) ->
    % Manual decomposition request for specific goal
    case maps:get(GoalId, Data#goal_data.goal_hierarchy, undefined) of
        undefined ->
            {keep_state_and_data, [{reply, From, {error, goal_not_found}}]};
        GoalNode ->
            spawn(fun() ->
                ManualDecompResult = decompose_specific_goal(GoalNode, Data),
                gen_statem:cast(self(), {manual_decomposition_complete, GoalId, ManualDecompResult})
            end),
            {keep_state_and_data, [{reply, From, {ok, decomposition_started}}]}
    end;

decomposition(cast, {manual_decomposition_complete, GoalId, Result}, Data) ->
    % Manual decomposition completed
    UpdatedData = integrate_manual_decomposition(GoalId, Result, Data),
    {keep_state, UpdatedData};

decomposition(state_timeout, decomposition_timeout, Data) ->
    % Decomposition timeout, proceed with current hierarchy
    {next_state, subgoal_creation, Data};

decomposition(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, decomposition).

%% State: subgoal_creation - Creating and refining subgoals
subgoal_creation(enter, _OldState, Data) ->
    % Refine and create additional subgoals as needed
    refine_subgoal_hierarchy(Data),
    {keep_state_and_data, []};

subgoal_creation({call, From}, {create_subgoal, ParentGoalId, SubgoalSpec}, Data) ->
    % Create new subgoal under specified parent
    case create_new_subgoal(ParentGoalId, SubgoalSpec, Data) of
        {ok, SubgoalId, UpdatedData} ->
            {keep_state, UpdatedData, [{reply, From, {ok, SubgoalId}}]};
        {error, CreationError} ->
            {keep_state_and_data, [{reply, From, {error, CreationError}}]}
    end;

subgoal_creation(cast, {subgoal_created, SubgoalId, SubgoalNode}, Data) ->
    % New subgoal created, integrate into hierarchy
    IntegratedData = integrate_new_subgoal(SubgoalId, SubgoalNode, Data),
    {keep_state, IntegratedData};

subgoal_creation(cast, subgoal_creation_complete, Data) ->
    % Subgoal creation phase complete
    {next_state, dependency_mapping, Data};

subgoal_creation(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, subgoal_creation).

%% State: dependency_mapping - Mapping dependencies between subgoals
dependency_mapping(enter, _OldState, Data) ->
    % Create comprehensive dependency mapping
    spawn(fun() ->
        DependencyGraph = create_dependency_graph(Data),
        gen_statem:cast(self(), {dependency_mapping_complete, DependencyGraph})
    end),
    {keep_state_and_data, [{state_timeout, 8000, dependency_timeout}]};

dependency_mapping(cast, {dependency_mapping_complete, DependencyGraph}, Data) ->
    % Dependency mapping complete, validate consistency
    case validate_dependency_consistency(DependencyGraph, Data) of
        {valid, ValidatedGraph} ->
            DependentData = Data#goal_data{dependency_graph = ValidatedGraph},
            {next_state, optimization, DependentData};
        {inconsistent, Inconsistencies} ->
            % Resolve dependency inconsistencies
            ResolvedData = resolve_dependency_inconsistencies(Inconsistencies, Data),
            {repeat_state, ResolvedData};
        {circular_dependencies, CircularDeps} ->
            % Handle circular dependencies
            CircularResolvedData = resolve_circular_dependencies(CircularDeps, Data),
            {repeat_state, CircularResolvedData}
    end;

dependency_mapping({call, From}, {link_subgoals, SourceId, TargetId}, Data) ->
    % Create dependency link between subgoals
    case create_subgoal_dependency_link(SourceId, TargetId, Data) of
        {ok, LinkId, LinkedData} ->
            {keep_state, LinkedData, [{reply, From, {ok, LinkId}}]};
        {error, LinkError} ->
            {keep_state_and_data, [{reply, From, {error, LinkError}}]}
    end;

dependency_mapping(state_timeout, dependency_timeout, Data) ->
    % Timeout, proceed with current dependency mapping
    {next_state, optimization, Data};

dependency_mapping(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, dependency_mapping).

%% State: optimization - Optimizing goal sequence and resource allocation
optimization(enter, _OldState, Data) ->
    % Optimize goal execution sequence
    spawn(fun() ->
        OptimizationResult = optimize_goal_execution_sequence(Data),
        gen_statem:cast(self(), {optimization_complete, OptimizationResult})
    end),
    {keep_state_and_data, [{state_timeout, 10000, optimization_timeout}]};

optimization(cast, {optimization_complete, OptimizationResult}, Data) ->
    case OptimizationResult of
        {optimized, OptimizedSequence, PerformanceGains} ->
            % Optimization successful
            OptimizedData = Data#goal_data{
                execution_sequence = OptimizedSequence,
                optimization_history = [PerformanceGains | Data#goal_data.optimization_history]
            },
            {next_state, validation, OptimizedData};
        {no_improvement, CurrentSequence} ->
            % No improvement found, keep current sequence
            UnchangedData = Data#goal_data{execution_sequence = CurrentSequence},
            {next_state, validation, UnchangedData};
        {optimization_error, Error} ->
            % Optimization failed, proceed without optimization
            ErrorData = record_optimization_error(Error, Data),
            {next_state, validation, ErrorData}
    end;

optimization({call, From}, optimize_sequence, Data) ->
    % Manual optimization request
    spawn(fun() ->
        ManualOptResult = perform_manual_optimization(Data),
        gen_statem:cast(self(), {manual_optimization_complete, ManualOptResult})
    end),
    {keep_state_and_data, [{reply, From, {ok, optimization_started}}]};

optimization(cast, {manual_optimization_complete, Result}, Data) ->
    % Manual optimization completed
    ManualOptData = apply_manual_optimization_result(Result, Data),
    {keep_state, ManualOptData};

optimization(state_timeout, optimization_timeout, Data) ->
    % Optimization timeout, proceed with current state
    {next_state, validation, Data};

optimization(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, optimization).

%% State: validation - Validating goal hierarchy consistency and feasibility
validation(enter, _OldState, Data) ->
    % Comprehensive validation of goal hierarchy
    spawn(fun() ->
        ValidationResult = validate_complete_goal_hierarchy(Data),
        gen_statem:cast(self(), {validation_complete, ValidationResult})
    end),
    {keep_state_and_data, [{state_timeout, 6000, validation_timeout}]};

validation(cast, {validation_complete, ValidationResult}, Data) ->
    case ValidationResult of
        {valid, ValidationReport} ->
            % Validation successful, proceed to execution planning
            ValidatedData = store_validation_report(ValidationReport, Data),
            {next_state, execution_planning, ValidatedData};
        {invalid, ValidationErrors} ->
            % Validation failed, fix errors
            case fix_validation_errors(ValidationErrors, Data) of
                {fixed, FixedData} ->
                    {repeat_state, FixedData};
                {unfixable, UnfixableData} ->
                    {next_state, execution_planning, UnfixableData}
            end;
        {needs_restructuring, RestructuringNeeds} ->
            % Hierarchy needs restructuring
            RestructuredData = restructure_goal_hierarchy(RestructuringNeeds, Data),
            {next_state, decomposition, RestructuredData}
    end;

validation({call, From}, validate_hierarchy, Data) ->
    % Manual validation request
    ValidationStatus = perform_immediate_validation(Data),
    {keep_state_and_data, [{reply, From, {ok, ValidationStatus}}]};

validation(state_timeout, validation_timeout, Data) ->
    % Validation timeout, proceed anyway
    {next_state, execution_planning, Data};

validation(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, validation).

%% State: execution_planning - Creating execution plan for goal hierarchy
execution_planning(enter, _OldState, Data) ->
    % Create comprehensive execution plan
    ExecutionPlan = create_goal_execution_plan(Data),
    PlannedData = Data#goal_data{execution_sequence = ExecutionPlan},
    {next_state, monitoring, PlannedData};

execution_planning(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, execution_planning).

%% State: monitoring - Monitoring goal progress and adaptation
monitoring(enter, _OldState, Data) ->
    % Start monitoring goal progress
    start_goal_progress_monitoring(Data),
    {keep_state_and_data, []};

monitoring({call, From}, track_progress, Data) ->
    % Provide progress tracking information
    ProgressReport = generate_progress_report(Data),
    {keep_state_and_data, [{reply, From, {ok, ProgressReport}}]};

monitoring({call, From}, {adapt_goals, AdaptationTrigger}, Data) ->
    % Adaptation requested
    case should_adapt_goals(AdaptationTrigger, Data) of
        {yes, AdaptationStrategy} ->
            AdaptationData = prepare_goal_adaptation(AdaptationStrategy, Data),
            {next_state, adaptation, AdaptationData, [{reply, From, {ok, adaptation_started}}]};
        {no, Reason} ->
            {keep_state_and_data, [{reply, From, {ok, {adaptation_skipped, Reason}}}]}
    end;

monitoring(cast, {goal_progress_update, GoalId, Progress}, Data) ->
    % Update goal progress
    UpdatedData = update_goal_progress(GoalId, Progress, Data),
    {keep_state, UpdatedData};

monitoring(cast, {goal_completed, GoalId}, Data) ->
    % Goal completed, update hierarchy
    CompletedData = mark_goal_completed(GoalId, Data),
    case check_overall_completion(CompletedData) of
        {completed, FinalResults} ->
            {stop, {completed, FinalResults}, CompletedData};
        {in_progress, ContinuationData} ->
            {keep_state, ContinuationData}
    end;

monitoring(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, monitoring).

%% State: adaptation - Adapting goals based on changing circumstances
adaptation(enter, _OldState, Data) ->
    % Execute goal adaptation strategy
    execute_goal_adaptation(Data),
    {keep_state_and_data, [{state_timeout, 8000, adaptation_timeout}]};

adaptation(cast, {adaptation_complete, AdaptationResult}, Data) ->
    case AdaptationResult of
        {adapted, AdaptedHierarchy} ->
            % Adaptation successful
            AdaptedData = apply_goal_adaptation(AdaptedHierarchy, Data),
            {next_state, validation, AdaptedData};
        {no_adaptation_needed, CurrentHierarchy} ->
            % No adaptation needed
            {next_state, monitoring, Data};
        {adaptation_failed, FailureReason} ->
            % Adaptation failed, continue with current hierarchy
            FailureData = record_adaptation_failure(FailureReason, Data),
            {next_state, monitoring, FailureData}
    end;

adaptation({call, From}, {merge_branches, BranchIds}, Data) ->
    % Merge goal branches during adaptation
    case merge_goal_branches_internal(BranchIds, Data) of
        {ok, MergedData} ->
            {keep_state, MergedData, [{reply, From, {ok, branches_merged}}]};
        {error, MergeError} ->
            {keep_state_and_data, [{reply, From, {error, MergeError}}]}
    end;

adaptation({call, From}, {resolve_conflicts, ConflictData}, Data) ->
    % Resolve goal conflicts during adaptation
    case resolve_goal_conflicts(ConflictData, Data) of
        {resolved, ResolvedData} ->
            {keep_state, ResolvedData, [{reply, From, {ok, conflicts_resolved}}]};
        {unresolved, UnresolvedConflicts} ->
            {keep_state_and_data, [{reply, From, {error, {unresolved_conflicts, UnresolvedConflicts}}}]}
    end;

adaptation(state_timeout, adaptation_timeout, Data) ->
    % Adaptation timeout, return to monitoring
    {next_state, monitoring, Data};

adaptation(EventType, Event, Data) ->
    handle_common_events(EventType, Event, Data, adaptation).

%% Common event handling
handle_common_events(info, {external_goal_update, UpdateData}, Data, _CurrentState) ->
    UpdatedData = integrate_external_goal_update(UpdateData, Data),
    {keep_state, UpdatedData};

handle_common_events(_EventType, _Event, _Data, _CurrentState) ->
    keep_state_and_data.

terminate(_Reason, _StateName, Data) ->
    cleanup_goal_resources(Data),
    ok.

%% Internal Functions

generate_session_id() ->
    list_to_binary([
        "goal_session_",
        atom_to_list(node()),
        "_",
        integer_to_list(erlang:system_time(microsecond))
    ]).

generate_goal_id() ->
    list_to_binary([
        "goal_",
        integer_to_list(erlang:system_time(microsecond)),
        "_",
        integer_to_list(rand:uniform(10000))
    ]).

create_goal_node(GoalId, ParentId, GoalSpec, GoalType) ->
    #goal_node{
        goal_id = GoalId,
        parent_goal_id = ParentId,
        goal_description = maps:get(description, GoalSpec, <<"">>),
        goal_type = GoalType,
        success_criteria = maps:get(success_criteria, GoalSpec, #{}),
        resource_requirements = maps:get(resources, GoalSpec, #{}),
        estimated_effort = maps:get(effort, GoalSpec, medium),
        priority_level = maps:get(priority, GoalSpec, normal),
        temporal_constraints = maps:get(temporal_constraints, GoalSpec, #{})
    }.

initialize_cognitive_model() ->
    #{
        decomposition_depth => 4,
        optimization_preference => balanced,
        adaptation_sensitivity => 0.7,
        conflict_resolution_strategy => collaborative,
        learning_rate => 0.1,
        meta_cognitive_monitoring => enabled
    }.

%% Placeholder implementations for complex goal operations
analyze_goal_complexity(_Goal, _Data) -> #{requires_decomposition => true}.
store_goal_analysis(_Analysis, Data) -> Data.
mark_goal_as_atomic(_Analysis, Data) -> Data.
perform_goal_decomposition(_Goal, _Data) -> {success, #{}, #{}}.
merge_goal_hierarchies(_New, Existing) -> Existing.
handle_partial_decomposition(_Partial, _Unresolved, Data) -> Data.
try_alternative_decomposition_strategy(_Error, Data) -> {no_alternative, Data}.
decompose_specific_goal(_GoalNode, _Data) -> decomposition_result.
integrate_manual_decomposition(_GoalId, _Result, Data) -> Data.
refine_subgoal_hierarchy(_Data) -> ok.
create_new_subgoal(_ParentId, _SubgoalSpec, Data) -> {error, not_implemented}.
integrate_new_subgoal(_SubgoalId, _SubgoalNode, Data) -> Data.
create_dependency_graph(_Data) -> dependency_graph.
validate_dependency_consistency(_Graph, _Data) -> {valid, validated_graph}.
resolve_dependency_inconsistencies(_Inconsistencies, Data) -> Data.
resolve_circular_dependencies(_CircularDeps, Data) -> Data.
create_subgoal_dependency_link(_SourceId, _TargetId, Data) -> {error, not_implemented}.
optimize_goal_execution_sequence(_Data) -> {optimized, optimized_sequence, performance_gains}.
record_optimization_error(_Error, Data) -> Data.
perform_manual_optimization(_Data) -> manual_optimization_result.
apply_manual_optimization_result(_Result, Data) -> Data.
validate_complete_goal_hierarchy(_Data) -> {valid, validation_report}.
store_validation_report(_Report, Data) -> Data.
fix_validation_errors(_Errors, Data) -> {unfixable, Data}.
restructure_goal_hierarchy(_Needs, Data) -> Data.
perform_immediate_validation(_Data) -> validation_status.
create_goal_execution_plan(_Data) -> execution_plan.
start_goal_progress_monitoring(_Data) -> ok.
generate_progress_report(_Data) -> progress_report.
should_adapt_goals(_Trigger, _Data) -> {no, no_adaptation_needed}.
prepare_goal_adaptation(_Strategy, Data) -> Data.
update_goal_progress(_GoalId, _Progress, Data) -> Data.
mark_goal_completed(_GoalId, Data) -> Data.
check_overall_completion(_Data) -> {in_progress, continuation_data}.
execute_goal_adaptation(_Data) -> ok.
apply_goal_adaptation(_Hierarchy, Data) -> Data.
record_adaptation_failure(_Reason, Data) -> Data.
merge_goal_branches_internal(_BranchIds, Data) -> {error, not_implemented}.
resolve_goal_conflicts(_ConflictData, Data) -> {unresolved, unresolved_conflicts}.
integrate_external_goal_update(_UpdateData, Data) -> Data.
cleanup_goal_resources(_Data) -> ok.
initialize_progress_tracking() -> #{}.