import { camelCase, listProperties, snakeCase } from "../lib/wizard";
import wizardSchema from "../lib/wizard-schema";
import EmberObject from "@ember/object";
import { A } from "@ember/array";

function present(val) {
  if (val === null || val === undefined) {
    return false;
  } else if (typeof val === "object") {
    return Object.keys(val).length !== 0;
  } else if (typeof val === "string" || val.constructor === Array) {
    return val && val.length;
  } else {
    return false;
  }
}

function mapped(property, type) {
  return wizardSchema[type].mapped.indexOf(property) > -1;
}

function castCase(property, value) {
  return property.indexOf("_type") > -1 ? camelCase(value) : value;
}

function buildProperty(json, property, type) {
  let value = json[property];

  if (mapped(property, type) && present(value) && value.constructor === Array) {
    let inputs = [];

    value.forEach((inputJson) => {
      let input = {};

      Object.keys(inputJson).forEach((inputKey) => {
        if (inputKey === "pairs") {
          let pairs = [];
          let pairCount = inputJson.pairs.length;

          inputJson.pairs.forEach((pairJson) => {
            let pair = {};

            Object.keys(pairJson).forEach((pairKey) => {
              pair[pairKey] = castCase(pairKey, pairJson[pairKey]);
            });

            pair.pairCount = pairCount;

            pairs.push(EmberObject.create(pair));
          });

          input.pairs = pairs;
        } else {
          input[inputKey] = castCase(inputKey, inputJson[inputKey]);
        }
      });

      inputs.push(EmberObject.create(input));
    });

    return A(inputs);
  } else {
    return value;
  }
}

function buildObject(json, type) {
  let props = {
    isNew: false,
  };

  Object.keys(json).forEach((prop) => {
    props[prop] = buildProperty(json, prop, type);
  });

  return EmberObject.create(props);
}

function buildObjectArray(json, type) {
  let array = A();

  if (present(json)) {
    json.forEach((objJson) => {
      let object = buildObject(objJson, type);

      if (hasAdvancedProperties(object, type)) {
        object.set("showAdvanced", true);
      }

      array.pushObject(object);
    });
  }

  return array;
}

function buildBasicProperties(json, type, props) {
  listProperties(type).forEach((p) => {
    props[p] = buildProperty(json, p, type);

    if (hasAdvancedProperties(json, type)) {
      props.showAdvanced = true;
    }
  });

  return props;
}

function hasAdvancedProperties(object, type) {
  return Object.keys(object).some((p) => {
    return wizardSchema[type].advanced.indexOf(p) > -1 && present(object[p]);
  });
}

/// to be removed: necessary due to action array being moved from step to wizard
function actionPatch(json) {
  let actions = json.actions || [];

  json.steps.forEach((step) => {
    if (step.actions && step.actions.length) {
      step.actions.forEach((action) => {
        action.run_after = "wizard_completion";
        actions.push(action);
      });
    }
  });

  json.actions = actions;

  return json;
}
///

function buildProperties(json) {
  let props = {
    steps: A(),
    actions: A(),
  };

  if (present(json)) {
    props.existingId = true;
    props = buildBasicProperties(json, "wizard", props);

    if (present(json.steps)) {
      json.steps.forEach((stepJson) => {
        let stepProps = {
          isNew: false,
        };

        stepProps = buildBasicProperties(stepJson, "step", stepProps);
        stepProps.fields = buildObjectArray(stepJson.fields, "field");

        props.steps.pushObject(EmberObject.create(stepProps));
      });
    }

    json = actionPatch(json); // to be removed - see above

    props.actions = buildObjectArray(json.actions, "action");
  } else {
    listProperties("wizard").forEach((prop) => {
      props[prop] = wizardSchema.wizard.basic[prop];
    });
  }

  return props;
}

export { buildProperties, present, mapped };