import { setNodeLocationFull, setNodeLocationOnlyOffset, addTerminalToCst, addNoneTerminalToCst } from '../../cst/cst.mjs';
import { createBaseSemanticVisitorConstructor, createBaseVisitorConstructorWithDefaults } from '../../cst/cst_visitor.mjs';
import { DEFAULT_PARSER_CONFIG } from '../parser.mjs';
import has from '../../../../../../../../lodash-es@4.17.21/node_modules/lodash-es/has.mjs';
import noop from '../../../../../../../../lodash-es@4.17.21/node_modules/lodash-es/noop.mjs';
import isUndefined from '../../../../../../../../lodash-es@4.17.21/node_modules/lodash-es/isUndefined.mjs';
import keys from '../../../../../../../../lodash-es@4.17.21/node_modules/lodash-es/keys.mjs';

/**
 * This trait is responsible for the CST building logic.
 */
class TreeBuilder {
    initTreeBuilder(config) {
        this.CST_STACK = [];
        // outputCst is no longer exposed/defined in the pubic API
        this.outputCst = config.outputCst;
        this.nodeLocationTracking = has(config, "nodeLocationTracking")
            ? config.nodeLocationTracking // assumes end user provides the correct config value/type
            : DEFAULT_PARSER_CONFIG.nodeLocationTracking;
        if (!this.outputCst) {
            this.cstInvocationStateUpdate = noop;
            this.cstFinallyStateUpdate = noop;
            this.cstPostTerminal = noop;
            this.cstPostNonTerminal = noop;
            this.cstPostRule = noop;
        }
        else {
            if (/full/i.test(this.nodeLocationTracking)) {
                if (this.recoveryEnabled) {
                    this.setNodeLocationFromToken = setNodeLocationFull;
                    this.setNodeLocationFromNode = setNodeLocationFull;
                    this.cstPostRule = noop;
                    this.setInitialNodeLocation = this.setInitialNodeLocationFullRecovery;
                }
                else {
                    this.setNodeLocationFromToken = noop;
                    this.setNodeLocationFromNode = noop;
                    this.cstPostRule = this.cstPostRuleFull;
                    this.setInitialNodeLocation = this.setInitialNodeLocationFullRegular;
                }
            }
            else if (/onlyOffset/i.test(this.nodeLocationTracking)) {
                if (this.recoveryEnabled) {
                    this.setNodeLocationFromToken = setNodeLocationOnlyOffset;
                    this.setNodeLocationFromNode = setNodeLocationOnlyOffset;
                    this.cstPostRule = noop;
                    this.setInitialNodeLocation =
                        this.setInitialNodeLocationOnlyOffsetRecovery;
                }
                else {
                    this.setNodeLocationFromToken = noop;
                    this.setNodeLocationFromNode = noop;
                    this.cstPostRule = this.cstPostRuleOnlyOffset;
                    this.setInitialNodeLocation =
                        this.setInitialNodeLocationOnlyOffsetRegular;
                }
            }
            else if (/none/i.test(this.nodeLocationTracking)) {
                this.setNodeLocationFromToken = noop;
                this.setNodeLocationFromNode = noop;
                this.cstPostRule = noop;
                this.setInitialNodeLocation = noop;
            }
            else {
                throw Error(`Invalid <nodeLocationTracking> config option: "${config.nodeLocationTracking}"`);
            }
        }
    }
    setInitialNodeLocationOnlyOffsetRecovery(cstNode) {
        cstNode.location = {
            startOffset: NaN,
            endOffset: NaN,
        };
    }
    setInitialNodeLocationOnlyOffsetRegular(cstNode) {
        cstNode.location = {
            // without error recovery the starting Location of a new CstNode is guaranteed
            // To be the next Token's startOffset (for valid inputs).
            // For invalid inputs there won't be any CSTOutput so this potential
            // inaccuracy does not matter
            startOffset: this.LA(1).startOffset,
            endOffset: NaN,
        };
    }
    setInitialNodeLocationFullRecovery(cstNode) {
        cstNode.location = {
            startOffset: NaN,
            startLine: NaN,
            startColumn: NaN,
            endOffset: NaN,
            endLine: NaN,
            endColumn: NaN,
        };
    }
    /**
       *  @see setInitialNodeLocationOnlyOffsetRegular for explanation why this work
  
       * @param cstNode
       */
    setInitialNodeLocationFullRegular(cstNode) {
        const nextToken = this.LA(1);
        cstNode.location = {
            startOffset: nextToken.startOffset,
            startLine: nextToken.startLine,
            startColumn: nextToken.startColumn,
            endOffset: NaN,
            endLine: NaN,
            endColumn: NaN,
        };
    }
    cstInvocationStateUpdate(fullRuleName) {
        const cstNode = {
            name: fullRuleName,
            children: Object.create(null),
        };
        this.setInitialNodeLocation(cstNode);
        this.CST_STACK.push(cstNode);
    }
    cstFinallyStateUpdate() {
        this.CST_STACK.pop();
    }
    cstPostRuleFull(ruleCstNode) {
        // casts to `required<CstNodeLocation>` are safe because `cstPostRuleFull` should only be invoked when full location is enabled
        const prevToken = this.LA(0);
        const loc = ruleCstNode.location;
        // If this condition is true it means we consumed at least one Token
        // In this CstNode.
        if (loc.startOffset <= prevToken.startOffset === true) {
            loc.endOffset = prevToken.endOffset;
            loc.endLine = prevToken.endLine;
            loc.endColumn = prevToken.endColumn;
        }
        // "empty" CstNode edge case
        else {
            loc.startOffset = NaN;
            loc.startLine = NaN;
            loc.startColumn = NaN;
        }
    }
    cstPostRuleOnlyOffset(ruleCstNode) {
        const prevToken = this.LA(0);
        // `location' is not null because `cstPostRuleOnlyOffset` will only be invoked when location tracking is enabled.
        const loc = ruleCstNode.location;
        // If this condition is true it means we consumed at least one Token
        // In this CstNode.
        if (loc.startOffset <= prevToken.startOffset === true) {
            loc.endOffset = prevToken.endOffset;
        }
        // "empty" CstNode edge case
        else {
            loc.startOffset = NaN;
        }
    }
    cstPostTerminal(key, consumedToken) {
        const rootCst = this.CST_STACK[this.CST_STACK.length - 1];
        addTerminalToCst(rootCst, consumedToken, key);
        // This is only used when **both** error recovery and CST Output are enabled.
        this.setNodeLocationFromToken(rootCst.location, consumedToken);
    }
    cstPostNonTerminal(ruleCstResult, ruleName) {
        const preCstNode = this.CST_STACK[this.CST_STACK.length - 1];
        addNoneTerminalToCst(preCstNode, ruleName, ruleCstResult);
        // This is only used when **both** error recovery and CST Output are enabled.
        this.setNodeLocationFromNode(preCstNode.location, ruleCstResult.location);
    }
    getBaseCstVisitorConstructor() {
        if (isUndefined(this.baseCstVisitorConstructor)) {
            const newBaseCstVisitorConstructor = createBaseSemanticVisitorConstructor(this.className, keys(this.gastProductionsCache));
            this.baseCstVisitorConstructor = newBaseCstVisitorConstructor;
            return newBaseCstVisitorConstructor;
        }
        return this.baseCstVisitorConstructor;
    }
    getBaseCstVisitorConstructorWithDefaults() {
        if (isUndefined(this.baseCstVisitorWithDefaultsConstructor)) {
            const newConstructor = createBaseVisitorConstructorWithDefaults(this.className, keys(this.gastProductionsCache), this.getBaseCstVisitorConstructor());
            this.baseCstVisitorWithDefaultsConstructor = newConstructor;
            return newConstructor;
        }
        return this.baseCstVisitorWithDefaultsConstructor;
    }
    getLastExplicitRuleShortName() {
        const ruleStack = this.RULE_STACK;
        return ruleStack[ruleStack.length - 1];
    }
    getPreviousExplicitRuleShortName() {
        const ruleStack = this.RULE_STACK;
        return ruleStack[ruleStack.length - 2];
    }
    getLastExplicitRuleOccurrenceIndex() {
        const occurrenceStack = this.RULE_OCCURRENCE_STACK;
        return occurrenceStack[occurrenceStack.length - 1];
    }
}

export { TreeBuilder };
