/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
import { CancellationToken } from '../../../../base/common/cancellation.js';
import { FuzzyScore } from '../../../../base/common/filters.js';
import { Iterable } from '../../../../base/common/iterator.js';
import { RefCountedDisposable } from '../../../../base/common/lifecycle.js';
import { ICodeEditorService } from '../../../browser/services/codeEditorService.js';
import { Range } from '../../../common/core/range.js';
import { registerEditorFeature } from '../../../common/editorFeatures.js';
import { ILanguageFeaturesService } from '../../../common/services/languageFeatures.js';
import { CompletionModel, LineContext } from './completionModel.js';
import { CompletionOptions, provideSuggestionItems, QuickSuggestionsOptions } from './suggest.js';
import { ISuggestMemoryService } from './suggestMemory.js';
import { SuggestModel } from './suggestModel.js';
import { WordDistance } from './wordDistance.js';
import { IClipboardService } from '../../../../platform/clipboard/common/clipboardService.js';
class SuggestInlineCompletion {
    constructor(range, insertText, filterText, additionalTextEdits, command, completion) {
        this.range = range;
        this.insertText = insertText;
        this.filterText = filterText;
        this.additionalTextEdits = additionalTextEdits;
        this.command = command;
        this.completion = completion;
    }
}
let InlineCompletionResults = class InlineCompletionResults extends RefCountedDisposable {
    constructor(model, line, word, completionModel, completions, _suggestMemoryService) {
        super(completions.disposable);
        this.model = model;
        this.line = line;
        this.word = word;
        this.completionModel = completionModel;
        this._suggestMemoryService = _suggestMemoryService;
    }
    canBeReused(model, line, word) {
        return this.model === model // same model
            && this.line === line
            && this.word.word.length > 0
            && this.word.startColumn === word.startColumn && this.word.endColumn < word.endColumn // same word
            && this.completionModel.getIncompleteProvider().size === 0; // no incomplete results
    }
    get items() {
        var _a;
        const result = [];
        // Split items by preselected index. This ensures the memory-selected item shows first and that better/worst
        // ranked items are before/after
        const { items } = this.completionModel;
        const selectedIndex = this._suggestMemoryService.select(this.model, { lineNumber: this.line, column: this.word.endColumn + this.completionModel.lineContext.characterCountDelta }, items);
        const first = Iterable.slice(items, selectedIndex);
        const second = Iterable.slice(items, 0, selectedIndex);
        let resolveCount = 5;
        for (const item of Iterable.concat(first, second)) {
            if (item.score === FuzzyScore.Default) {
                // skip items that have no overlap
                continue;
            }
            const range = new Range(item.editStart.lineNumber, item.editStart.column, item.editInsertEnd.lineNumber, item.editInsertEnd.column + this.completionModel.lineContext.characterCountDelta // end PLUS character delta
            );
            const insertText = item.completion.insertTextRules && (item.completion.insertTextRules & 4 /* CompletionItemInsertTextRule.InsertAsSnippet */)
                ? { snippet: item.completion.insertText }
                : item.completion.insertText;
            result.push(new SuggestInlineCompletion(range, insertText, (_a = item.filterTextLow) !== null && _a !== void 0 ? _a : item.labelLow, item.completion.additionalTextEdits, item.completion.command, item));
            // resolve the first N suggestions eagerly
            if (resolveCount-- >= 0) {
                item.resolve(CancellationToken.None);
            }
        }
        return result;
    }
};
InlineCompletionResults = __decorate([
    __param(5, ISuggestMemoryService)
], InlineCompletionResults);
let SuggestInlineCompletions = class SuggestInlineCompletions {
    constructor(_languageFeatureService, _clipboardService, _suggestMemoryService, _editorService) {
        this._languageFeatureService = _languageFeatureService;
        this._clipboardService = _clipboardService;
        this._suggestMemoryService = _suggestMemoryService;
        this._editorService = _editorService;
    }
    async provideInlineCompletions(model, position, context, token) {
        var _a;
        if (context.selectedSuggestionInfo) {
            return;
        }
        let editor;
        for (const candidate of this._editorService.listCodeEditors()) {
            if (candidate.getModel() === model) {
                editor = candidate;
                break;
            }
        }
        if (!editor) {
            return;
        }
        const config = editor.getOption(88 /* EditorOption.quickSuggestions */);
        if (QuickSuggestionsOptions.isAllOff(config)) {
            // quick suggest is off (for this model/language)
            return;
        }
        model.tokenization.tokenizeIfCheap(position.lineNumber);
        const lineTokens = model.tokenization.getLineTokens(position.lineNumber);
        const tokenType = lineTokens.getStandardTokenType(lineTokens.findTokenIndexAtOffset(Math.max(position.column - 1 - 1, 0)));
        if (QuickSuggestionsOptions.valueFor(config, tokenType) !== 'inline') {
            // quick suggest is off (for this token)
            return undefined;
        }
        // We consider non-empty leading words and trigger characters. The latter only
        // when no word is being typed (word characters superseed trigger characters)
        let wordInfo = model.getWordAtPosition(position);
        let triggerCharacterInfo;
        if (!(wordInfo === null || wordInfo === void 0 ? void 0 : wordInfo.word)) {
            triggerCharacterInfo = this._getTriggerCharacterInfo(model, position);
        }
        if (!(wordInfo === null || wordInfo === void 0 ? void 0 : wordInfo.word) && !triggerCharacterInfo) {
            // not at word, not a trigger character
            return;
        }
        // ensure that we have word information and that we are at the end of a word
        // otherwise we stop because we don't want to do quick suggestions inside words
        if (!wordInfo) {
            wordInfo = model.getWordUntilPosition(position);
        }
        if (wordInfo.endColumn !== position.column) {
            return;
        }
        let result;
        const leadingLineContents = model.getValueInRange(new Range(position.lineNumber, 1, position.lineNumber, position.column));
        if (!triggerCharacterInfo && ((_a = this._lastResult) === null || _a === void 0 ? void 0 : _a.canBeReused(model, position.lineNumber, wordInfo))) {
            // reuse a previous result iff possible, only a refilter is needed
            // TODO@jrieken this can be improved further and only incomplete results can be updated
            // console.log(`REUSE with ${wordInfo.word}`);
            const newLineContext = new LineContext(leadingLineContents, position.column - this._lastResult.word.endColumn);
            this._lastResult.completionModel.lineContext = newLineContext;
            this._lastResult.acquire();
            result = this._lastResult;
        }
        else {
            // refesh model is required
            const completions = await provideSuggestionItems(this._languageFeatureService.completionProvider, model, position, new CompletionOptions(undefined, SuggestModel.createSuggestFilter(editor).itemKind, triggerCharacterInfo === null || triggerCharacterInfo === void 0 ? void 0 : triggerCharacterInfo.providers), triggerCharacterInfo && { triggerKind: 1 /* CompletionTriggerKind.TriggerCharacter */, triggerCharacter: triggerCharacterInfo.ch }, token);
            let clipboardText;
            if (completions.needsClipboard) {
                clipboardText = await this._clipboardService.readText();
            }
            const completionModel = new CompletionModel(completions.items, position.column, new LineContext(leadingLineContents, 0), WordDistance.None, editor.getOption(117 /* EditorOption.suggest */), editor.getOption(111 /* EditorOption.snippetSuggestions */), { boostFullMatch: false, firstMatchCanBeWeak: false }, clipboardText);
            result = new InlineCompletionResults(model, position.lineNumber, wordInfo, completionModel, completions, this._suggestMemoryService);
        }
        this._lastResult = result;
        return result;
    }
    handleItemDidShow(_completions, item) {
        item.completion.resolve(CancellationToken.None);
    }
    freeInlineCompletions(result) {
        result.release();
    }
    _getTriggerCharacterInfo(model, position) {
        var _a;
        const ch = model.getValueInRange(Range.fromPositions({ lineNumber: position.lineNumber, column: position.column - 1 }, position));
        const providers = new Set();
        for (const provider of this._languageFeatureService.completionProvider.all(model)) {
            if ((_a = provider.triggerCharacters) === null || _a === void 0 ? void 0 : _a.includes(ch)) {
                providers.add(provider);
            }
        }
        if (providers.size === 0) {
            return undefined;
        }
        return { providers, ch };
    }
};
SuggestInlineCompletions = __decorate([
    __param(0, ILanguageFeaturesService),
    __param(1, IClipboardService),
    __param(2, ISuggestMemoryService),
    __param(3, ICodeEditorService)
], SuggestInlineCompletions);
export { SuggestInlineCompletions };
registerEditorFeature(SuggestInlineCompletions);
