export type WorkflowNodeKind =
  | 'environment'
  | 'space'
  | 'agent'
  | 'behavior'
  | 'output';

export type WorkflowPortType =
  | 'ENV_CONTEXT'
  | 'SPACE_CONTEXT'
  | 'AGENT_CONTEXT'
  | 'OBSERVABLE_INFO'
  | 'BEHAVIOR_OUTPUT'
  | 'REPORT';

export type WorkflowNodeStatus = 'ready' | 'warning' | 'error' | 'success';

export interface WorkflowPort {
  id: string;
  label: string;
  type: WorkflowPortType;
}

export interface WorkflowNode {
  id: string;
  title: string;
  subtitle: string;
  kind: WorkflowNodeKind;
  x: number;
  y: number;
  status: WorkflowNodeStatus;
  inputs: WorkflowPort[];
  outputs: WorkflowPort[];
  config: Array<{ label: string; value: string }>;
}

export interface WorkflowEdge {
  id: string;
  source: string;
  target: string;
  type: WorkflowPortType;
  label: string;
}

export type AttributeScope = 'endogenous' | 'exogenous' | 'derived';

export interface WorkflowParameter {
  id: string;
  nodeId: string;
  name: string;
  type: 'Float' | 'Integer' | 'Boolean' | 'String' | 'Coordinate';
  scope: AttributeScope;
  source: string;
  value: string;
  status: 'ok' | 'warning' | 'error';
  description: string;
}

export type BehaviorSectionKind = 'observable_pool' | 'input' | 'calculation' | 'output';

export interface BehaviorSection {
  id: string;
  nodeId: string;
  kind: BehaviorSectionKind;
  title: string;
  description: string;
  items: Array<{ label: string; source: string; value: string }>;
}

export interface WorkflowModel {
  nodes: WorkflowNode[];
  edges: WorkflowEdge[];
  parameters: WorkflowParameter[];
  behaviorSections: BehaviorSection[];
}

export type InitialSpaceType = 'grid' | 'network' | 'continuous' | 'gis';

function createSpaceNode(spaceType: InitialSpaceType): WorkflowNode {
  const spaceConfig: Record<InitialSpaceType, { title: string; subtitle: string; config: Array<{ label: string; value: string }> }> = {
    grid: {
      title: 'Grid Space',
      subtitle: '40 x 40 grid for spatial interaction',
      config: [
        { label: 'width', value: '40' },
        { label: 'height', value: '40' },
        { label: 'horizontal wrap', value: 'true' },
        { label: 'vertical wrap', value: 'true' },
        { label: 'agent capacity/cell', value: '1' },
      ],
    },
    network: {
      title: 'Network Space',
      subtitle: 'Nodes and edges for relationship-based interaction',
      config: [
        { label: 'network type', value: 'undirected' },
        { label: 'default degree', value: '4' },
        { label: 'rewiring', value: 'false' },
      ],
    },
    continuous: {
      title: 'Continuous Space',
      subtitle: 'Coordinate plane for movement and distance-based sensing',
      config: [
        { label: 'width', value: '100' },
        { label: 'height', value: '100' },
        { label: 'boundary', value: 'bounded' },
      ],
    },
    gis: {
      title: 'GIS Space',
      subtitle: 'Map-coordinate space for real geography',
      config: [
        { label: 'projection', value: 'WGS84' },
        { label: 'basemap', value: 'not selected' },
        { label: 'boundary layer', value: 'required' },
      ],
    },
  };

  const selected = spaceConfig[spaceType];

  return {
    id: `${spaceType}-space`,
    title: selected.title,
    subtitle: selected.subtitle,
    kind: 'space',
    x: 100,
    y: 80,
    status: spaceType === 'grid' ? 'warning' : 'ready',
    inputs: [{ id: 'env', label: 'environment', type: 'ENV_CONTEXT' }],
    outputs: [{ id: 'space', label: 'space state', type: 'SPACE_CONTEXT' }],
    config: selected.config,
  };
}

export function createDefaultWorkflow(spaceType?: InitialSpaceType): WorkflowModel {
  const nodes: WorkflowNode[] = [
    {
      id: 'environment',
      title: 'Environment',
      subtitle: 'Global model container and shared context',
      kind: 'environment',
      x: -220,
      y: -110,
      status: 'ready',
      inputs: [],
      outputs: [{ id: 'env', label: 'environment', type: 'ENV_CONTEXT' }],
      config: [
        { label: 'model type', value: 'ABM + Game Model' },
        { label: 'default agent', value: 'Example Agent' },
      ],
    },
    {
      id: 'example-agent',
      title: 'Example Agent',
      subtitle: 'Default agent with attributes and behaviors',
      kind: 'agent',
      x: 120,
      y: -95,
      status: 'ready',
      inputs: [
        { id: 'space', label: 'located in grid', type: 'SPACE_CONTEXT' },
        { id: 'env', label: 'environment context', type: 'ENV_CONTEXT' },
      ],
      outputs: [{ id: 'agent', label: 'agent state', type: 'AGENT_CONTEXT' }],
      config: [
        { label: 'attributes', value: 'endogenous + exogenous' },
        { label: 'behavior', value: 'on_sensing' },
      ],
    },
  ];

  if (spaceType) {
    nodes.splice(1, 0, createSpaceNode(spaceType));
  }

  const edges: WorkflowEdge[] = [
    { id: 'e1', source: 'environment', target: 'example-agent', type: 'ENV_CONTEXT', label: 'default context' },
  ];

  if (spaceType) {
    const spaceId = `${spaceType}-space`;
    edges.splice(
      0,
      1,
      { id: 'e1', source: 'environment', target: spaceId, type: 'ENV_CONTEXT', label: 'contains space' },
      { id: 'e2', source: spaceId, target: 'example-agent', type: 'SPACE_CONTEXT', label: 'locates agent' },
    );
  }

  return {
    nodes,
    edges,
    parameters: [
      {
        id: 'a1',
        nodeId: 'example-agent',
        name: 'race',
        type: 'String',
        scope: 'endogenous',
        source: 'initialization',
        value: 'A | B',
        status: 'ok',
        description: 'Agent group identity used by segregation behavior',
      },
      {
        id: 'a2',
        nodeId: 'example-agent',
        name: 'position',
        type: 'Coordinate',
        scope: 'derived',
        source: 'Grid Space connection',
        value: '(x, y)',
        status: 'ok',
        description: 'Automatically added when agent is connected to grid space',
      },
      {
        id: 'a3',
        nodeId: 'example-agent',
        name: 'happiness',
        type: 'Boolean',
        scope: 'endogenous',
        source: 'on_sensing output',
        value: '--',
        status: 'warning',
        description: 'Assigned by behavior after observing neighbors',
      },
      {
        id: 's1',
        nodeId: 'grid-space',
        name: 'cell_capacity',
        type: 'Integer',
        scope: 'exogenous',
        source: 'space config',
        value: '1',
        status: 'ok',
        description: 'How many agents can occupy one grid cell',
      },
      {
        id: 's2',
        nodeId: 'grid-space',
        name: 'neighbor_radius',
        type: 'Integer',
        scope: 'exogenous',
        source: 'space config',
        value: '--',
        status: 'error',
        description: 'Required for on_sensing neighborhood lookup',
      },
      {
        id: 'n1',
        nodeId: 'neighbor-agent',
        name: 'race',
        type: 'String',
        scope: 'endogenous',
        source: 'peer attribute',
        value: 'visible',
        status: 'ok',
        description: 'Selectable observable attribute for Example Agent',
      },
    ],
    behaviorSections: [
      {
        id: 'b1',
        nodeId: 'example-agent',
        kind: 'observable_pool',
        title: 'Observable Information Pool',
        description: 'All information the behavior may use, grouped by self and observed subjects.',
        items: [
          { label: 'self.race', source: 'Example Agent', value: 'String' },
          { label: 'self.position', source: 'Grid Space', value: 'Coordinate' },
          { label: 'neighbor.race', source: 'Neighbor Agent', value: 'String' },
          { label: 'space.neighbor_count', source: 'Grid Space', value: 'Integer' },
        ],
      },
      {
        id: 'b2',
        nodeId: 'example-agent',
        kind: 'input',
        title: 'Behavior Inputs',
        description: 'Selected inputs passed into this behavior.',
        items: [
          { label: 'self.position', source: 'Observable pool', value: 'selected' },
          { label: 'neighbor.race', source: 'Observable pool', value: 'selected' },
        ],
      },
      {
        id: 'b3',
        nodeId: 'example-agent',
        kind: 'calculation',
        title: 'Calculation or LLM Call',
        description: 'How inputs are transformed into a decision.',
        items: [
          { label: 'mode', source: 'user choice', value: 'formula' },
          { label: 'rule', source: 'behavior editor', value: 'same_race_neighbors / total_neighbors >= threshold' },
        ],
      },
      {
        id: 'b4',
        nodeId: 'example-agent',
        kind: 'output',
        title: 'Output Assignment',
        description: 'Where the return value is saved.',
        items: [
          { label: 'return', source: 'calculation', value: 'Boolean' },
          { label: 'assign to', source: 'Example Agent', value: 'self.happiness' },
        ],
      },
    ],
  };
}

export function getParametersForNode(workflow: WorkflowModel, nodeId: string) {
  return workflow.parameters.filter((parameter) => parameter.nodeId === nodeId);
}

export function getBehaviorSectionsForNode(workflow: WorkflowModel, nodeId: string) {
  return workflow.behaviorSections.filter((section) => section.nodeId === nodeId);
}

export const NODE_CARD_SIZE = {
  width: 176,
  height: 128,
};

export function getNodeConnectionAnchor({
  x,
  y,
  side,
}: {
  x: number;
  y: number;
  side: 'left' | 'right';
}) {
  return {
    x: side === 'left' ? x : x + NODE_CARD_SIZE.width,
    y: y + NODE_CARD_SIZE.height / 2,
  };
}