import * as ts from 'typescript';
import * as fs from 'fs-extra';
import * as path from 'path';
import * as _ from 'lodash';
import * as LiveServer from 'live-server';
import * as Shelljs from 'shelljs';
import marked from 'marked';

const glob: any = require('glob');

import { logger } from '../logger';
import { HtmlEngine } from './engines/html.engine';
import { MarkdownEngine } from './engines/markdown.engine';
import { FileEngine } from './engines/file.engine';
import { Configuration, IConfiguration } from './configuration';
import { $dependenciesEngine } from './engines/dependencies.engine';
import { NgdEngine } from './engines/ngd.engine';
import { SearchEngine } from './engines/search.engine';
import { Dependencies } from './compiler/dependencies';
import { RouterParser } from '../utils/router.parser';

import { COMPODOC_DEFAULTS } from '../utils/defaults';

let pkg = require('../package.json'),
    cwd = process.cwd(),
    $htmlengine = new HtmlEngine(),
    $fileengine = new FileEngine(),
    $markdownengine = new MarkdownEngine(),
    $ngdengine = new NgdEngine(),
    $searchEngine = new SearchEngine(),
    startTime = new Date();

export class Application {
    options:Object;
    files: Array<string>;

    configuration:IConfiguration;

    /**
     * Create a new compodoc application instance.
     *
     * @param options An object containing the options that should be used.
     */
    constructor(options?:Object) {
        this.configuration = Configuration.getInstance();

        for (let option in options ) {
            if(typeof this.configuration.mainData[option] !== 'undefined') {
                this.configuration.mainData[option] = options[option];
            }
        }
    }

    /**
     * Start compodoc
     */
    protected generate() {
        $htmlengine.init().then(() => {
            this.processPackageJson();
        });
    }

    setFiles(files:Array<string>) {
        this.files = files;
    }

    processPackageJson() {
        logger.info('Searching package.json file');
        $fileengine.get('package.json').then((packageData) => {
            let parsedData = JSON.parse(packageData);
            if (typeof parsedData.name !== 'undefined' && this.configuration.mainData.documentationMainName === COMPODOC_DEFAULTS.title) {
                this.configuration.mainData.documentationMainName = parsedData.name + ' documentation';
            }
            if (typeof parsedData.description !== 'undefined') {
                this.configuration.mainData.documentationMainDescription = parsedData.description;
            }
            logger.info('package.json file found');
            this.processMarkdown();
        }, (errorMessage) => {
            logger.error(errorMessage);
            logger.error('Continuing without package.json file');
            this.processMarkdown();
        });
    }

    processMarkdown() {
        logger.info('Searching README.md file');
        $markdownengine.getReadmeFile().then((readmeData: string) => {
            this.configuration.addPage({
                name: 'index',
                context: 'readme',
                depth: 1,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.ROOT
            });
            this.configuration.addPage({
                name: 'overview',
                context: 'overview',
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.ROOT
            });
            this.configuration.mainData.readme = readmeData;
            logger.info('README.md file found');
            this.getDependenciesData();
        }, (errorMessage) => {
            logger.error(errorMessage);
            logger.error('Continuing without README.md file');
            this.configuration.addPage({
                name: 'index',
                context: 'overview'
            });
            this.getDependenciesData();
        });
    }

    getDependenciesData() {
        logger.info('Get dependencies data');

        let crawler = new Dependencies(
          this.files, {
            tsconfigDirectory: path.dirname(this.configuration.mainData.tsconfig)
          }
        );

        let dependenciesData = crawler.getDependencies();

        $dependenciesEngine.init(dependenciesData);

        this.prepareModules();

        this.prepareComponents().then((readmeData) => {
            if ($dependenciesEngine.directives.length > 0) {
                this.prepareDirectives();
            }
            if ($dependenciesEngine.injectables.length > 0) {
                this.prepareInjectables();
            }
            if ($dependenciesEngine.routes.length > 0) {
                this.prepareRoutes();
            }

            if ($dependenciesEngine.pipes.length > 0) {
                this.preparePipes();
            }

            if ($dependenciesEngine.classes.length > 0) {
                this.prepareClasses();
            }

            if ($dependenciesEngine.interfaces.length > 0) {
                this.prepareInterfaces();
            }

            if ($dependenciesEngine.miscellaneous.variables.length > 0 ||
                $dependenciesEngine.miscellaneous.functions.length > 0 ||
                $dependenciesEngine.miscellaneous.typealiases.length > 0 ||
                $dependenciesEngine.miscellaneous.enumerations.length > 0 ) {
                this.prepareMiscellaneous();
            }

            if (!this.configuration.mainData.disableCoverage) {
                this.prepareCoverage();
            }

            this.processPages();
        }, (errorMessage) => {
            logger.error(errorMessage);
        });
    }

    prepareModules() {
        logger.info('Prepare modules');
        this.configuration.mainData.modules = $dependenciesEngine.getModules().map(ngModule => {
            ['declarations', 'bootstrap', 'imports', 'exports'].forEach(metadataType => {
                ngModule[metadataType] = ngModule[metadataType].filter(metaDataItem => {
                    switch (metaDataItem.type) {
                        case 'directive':
                            return $dependenciesEngine.getDirectives().some(directive => directive.name === metaDataItem.name);

                        case 'component':
                            return $dependenciesEngine.getComponents().some(component => component.name === metaDataItem.name);

                        case 'module':
                            return $dependenciesEngine.getModules().some(module => module.name === metaDataItem.name);

                        case 'pipe':
                            return $dependenciesEngine.getPipes().some(pipe => pipe.name === metaDataItem.name);

                        default:
                            return true;
                    }
                });
            });
            ngModule.providers = ngModule.providers.filter(provider => {
                return $dependenciesEngine.getInjectables().some(injectable => injectable.name === provider.name);
            });
            return ngModule;
        });
        this.configuration.addPage({
            name: 'modules',
            context: 'modules',
            depth: 1,
            pageType: COMPODOC_DEFAULTS.PAGE_TYPES.ROOT
        });
        let i = 0,
            len = this.configuration.mainData.modules.length;

        for(i; i<len; i++) {
            this.configuration.addPage({
                path: 'modules',
                name: this.configuration.mainData.modules[i].name,
                context: 'module',
                module: this.configuration.mainData.modules[i],
                depth: 2,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
            });
        }
    }

    preparePipes = () => {
        logger.info('Prepare pipes');
        this.configuration.mainData.pipes = $dependenciesEngine.getPipes();
        let i = 0,
            len = this.configuration.mainData.pipes.length;

        for(i; i<len; i++) {
            this.configuration.addPage({
                path: 'pipes',
                name: this.configuration.mainData.pipes[i].name,
                context: 'pipe',
                pipe: this.configuration.mainData.pipes[i],
                depth: 2,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
            });
        }
    }

    prepareClasses = () => {
        logger.info('Prepare classes');
        this.configuration.mainData.classes = $dependenciesEngine.getClasses();
        let i = 0,
            len = this.configuration.mainData.classes.length;

        for(i; i<len; i++) {
            this.configuration.addPage({
                path: 'classes',
                name: this.configuration.mainData.classes[i].name,
                context: 'class',
                class: this.configuration.mainData.classes[i],
                depth: 2,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
            });
        }
    }

    prepareInterfaces() {
        logger.info('Prepare interfaces');
        this.configuration.mainData.interfaces = $dependenciesEngine.getInterfaces();
        let i = 0,
            len = this.configuration.mainData.interfaces.length;
        for(i; i<len; i++) {
            this.configuration.addPage({
                path: 'interfaces',
                name: this.configuration.mainData.interfaces[i].name,
                context: 'interface',
                interface: this.configuration.mainData.interfaces[i],
                depth: 2,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
            });
        }
    }

    prepareMiscellaneous() {
        logger.info('Prepare miscellaneous');
        this.configuration.mainData.miscellaneous = $dependenciesEngine.getMiscellaneous();

        this.configuration.addPage({
            name: 'miscellaneous',
            context: 'miscellaneous',
            depth: 1,
            pageType: COMPODOC_DEFAULTS.PAGE_TYPES.ROOT
        });
    }

    prepareComponents() {
        logger.info('Prepare components');
        let that = this;
        that.configuration.mainData.components = $dependenciesEngine.getComponents();

        return new Promise(function(resolve, reject) {
            let i = 0,
                len = that.configuration.mainData.components.length,
                loop = () => {
                    if( i <= len-1) {
                        let dirname = path.dirname(that.configuration.mainData.components[i].file),
                            readmeFile = dirname + path.sep + 'README.md';
                        if (fs.existsSync(readmeFile)) {
                            logger.info('README.md exist for this component, include it');
                            fs.readFile(readmeFile, 'utf8', (err, data) => {
                                if (err) throw err;
                                that.configuration.mainData.components[i].readme = marked(data);
                                that.configuration.addPage({
                                    path: 'components',
                                    name: that.configuration.mainData.components[i].name,
                                    context: 'component',
                                    component: that.configuration.mainData.components[i],
                                    depth: 2,
                                    pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
                                });
                                i++;
                                loop();
                            });
                        } else {
                            that.configuration.addPage({
                                path: 'components',
                                name: that.configuration.mainData.components[i].name,
                                context: 'component',
                                component: that.configuration.mainData.components[i]
                            });
                            i++;
                            loop();
                        }
                    } else {
                        resolve();
                    }
                };
            loop();
        });
    }

    prepareDirectives = () => {
        logger.info('Prepare directives');
        this.configuration.mainData.directives = $dependenciesEngine.getDirectives();

        let i = 0,
            len = this.configuration.mainData.directives.length;

        for(i; i<len; i++) {
            this.configuration.addPage({
                path: 'directives',
                name: this.configuration.mainData.directives[i].name,
                context: 'directive',
                directive: this.configuration.mainData.directives[i],
                depth: 2,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
            });
        }
    }

    prepareInjectables() {
        logger.info('Prepare injectables');
        this.configuration.mainData.injectables = $dependenciesEngine.getInjectables();

        let i = 0,
            len = this.configuration.mainData.injectables.length;

        for(i; i<len; i++) {
            this.configuration.addPage({
                path: 'injectables',
                name: this.configuration.mainData.injectables[i].name,
                context: 'injectable',
                injectable: this.configuration.mainData.injectables[i],
                depth: 2,
                pageType: COMPODOC_DEFAULTS.PAGE_TYPES.INTERNAL
            });
        }
    }

    prepareRoutes() {
        logger.info('Process routes');
        this.configuration.mainData.routes = $dependenciesEngine.getRoutes();

        this.configuration.addPage({
            name: 'routes',
            context: 'routes',
            depth: 1,
            pageType: COMPODOC_DEFAULTS.PAGE_TYPES.ROOT
        });
    }

    prepareCoverage() {
        logger.info('Process documentation coverage report');

        /*
         * loop with components, classes, injectables, interfaces, pipes
         */
        var files = [],
            totalProjectStatementDocumented = 0,
            getStatus = function(percent) {
                var status;
                if (percent <= 25) {
                    status = 'low';
                } else if (percent > 25 && percent <= 50) {
                    status = 'medium';
                } else if (percent > 50 && percent <= 75) {
                    status = 'good';
                } else {
                    status = 'very-good';
                }
                return status;
            };

        _.forEach(this.configuration.mainData.components, (component) => {
            if (!component.propertiesClass ||
                !component.methodsClass ||
                !component.inputsClass ||
                !component.outputsClass) {
                    return;
                }
            let cl = {
                    filePath: component.file,
                    type: component.type,
                    name: component.name
                },
                totalStatementDocumented = 0,
                totalStatements = component.propertiesClass.length + component.methodsClass.length + component.inputsClass.length + component.outputsClass.length + 1; // +1 for component decorator comment
            _.forEach(component.propertiesClass, (property) => {
                if(property.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            _.forEach(component.methodsClass, (method) => {
                if(method.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            _.forEach(component.inputsClass, (input) => {
                if(input.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            _.forEach(component.outputsClass, (output) => {
                if(output.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            if (component.description !== '') {
                totalStatementDocumented += 1;
            }
            cl.coveragePercent = Math.floor((totalStatementDocumented / totalStatements) * 100);
            if(totalStatements === 0) {
                cl.coveragePercent = 0;
            }
            cl.coverageCount = totalStatementDocumented + '/' + totalStatements;
            cl.status = getStatus(cl.coveragePercent);
            totalProjectStatementDocumented += cl.coveragePercent;
            files.push(cl);
        })
        _.forEach(this.configuration.mainData.classes, (classe) => {
            if (!classe.properties ||
                !classe.methods) {
                    return;
                }
            let cl = {
                    filePath: classe.file,
                    type: 'classe',
                    name: classe.name
                },
                totalStatementDocumented = 0,
                totalStatements = classe.properties.length + classe.methods.length;
            _.forEach(classe.properties, (property) => {
                if(property.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            _.forEach(classe.methods, (method) => {
                if(method.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            cl.coveragePercent = Math.floor((totalStatementDocumented / totalStatements) * 100);
            if(totalStatements === 0) {
                cl.coveragePercent = 0;
            }
            cl.coverageCount = totalStatementDocumented + '/' + totalStatements;
            cl.status = getStatus(cl.coveragePercent);
            totalProjectStatementDocumented += cl.coveragePercent;
            files.push(cl);
        });
        _.forEach(this.configuration.mainData.injectables, (injectable) => {
            if (!injectable.properties ||
                !injectable.methods) {
                    return;
                }
            let cl = {
                    filePath: injectable.file,
                    type: injectable.type,
                    name: injectable.name
                },
                totalStatementDocumented = 0,
                totalStatements = injectable.properties.length + injectable.methods.length;
            _.forEach(injectable.properties, (property) => {
                if(property.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            _.forEach(injectable.methods, (method) => {
                if(method.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            cl.coveragePercent = Math.floor((totalStatementDocumented / totalStatements) * 100);
            if(totalStatements === 0) {
                cl.coveragePercent = 0;
            }
            cl.coverageCount = totalStatementDocumented + '/' + totalStatements;
            cl.status = getStatus(cl.coveragePercent);
            totalProjectStatementDocumented += cl.coveragePercent;
            files.push(cl);
        });
        _.forEach(this.configuration.mainData.interfaces, (inter) => {
            if (!inter.properties ||
                !inter.methods) {
                    return;
                }
            let cl = {
                    filePath: inter.file,
                    type: inter.type,
                    name: inter.name
                },
                totalStatementDocumented = 0,
                totalStatements = inter.properties.length + inter.methods.length;
            _.forEach(inter.properties, (property) => {
                if(property.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            _.forEach(inter.methods, (method) => {
                if(method.description !== '') {
                    totalStatementDocumented += 1;
                }
            });
            cl.coveragePercent = Math.floor((totalStatementDocumented / totalStatements) * 100);
            if(totalStatements === 0) {
                cl.coveragePercent = 0;
            }
            cl.coverageCount = totalStatementDocumented + '/' + totalStatements;
            cl.status = getStatus(cl.coveragePercent);
            totalProjectStatementDocumented += cl.coveragePercent;
            files.push(cl);
        });
        _.forEach(this.configuration.mainData.pipes, (pipe) => {
            let cl = {
                    filePath: pipe.file,
                    type: pipe.type,
                    name: pipe.name
                },
                totalStatementDocumented = 0,
                totalStatements = 1;
            if (pipe.description !== '') {
                totalStatementDocumented += 1;
            }
            cl.coveragePercent = Math.floor((totalStatementDocumented / totalStatements) * 100);
            cl.coverageCount = totalStatementDocumented + '/' + totalStatements;
            cl.status = getStatus(cl.coveragePercent);
            totalProjectStatementDocumented += cl.coveragePercent;
            files.push(cl);
        });
        files = _.sortBy(files, ['filePath']);
        var coverageData = {
            count: Math.floor(totalProjectStatementDocumented / files.length),
            status: ''
        };
        coverageData.status = getStatus(coverageData.count);
        this.configuration.addPage({
            name: 'coverage',
            context: 'coverage',
            files: files,
            data: coverageData,
            depth: 1,
            pageType: COMPODOC_DEFAULTS.PAGE_TYPES.ROOT
        });
    }

    processPages() {
        logger.info('Process pages');
        let pages = this.configuration.pages,
            i = 0,
            len = pages.length,
            loop = () => {
                if( i <= len-1) {
                    logger.info('Process page', pages[i].name);
                    $htmlengine.render(this.configuration.mainData, pages[i]).then((htmlData) => {
                        let finalPath = this.configuration.mainData.output;
                        if(this.configuration.mainData.output.lastIndexOf('/') === -1) {
                            finalPath += '/';
                        }
                        if (pages[i].path) {
                            finalPath += pages[i].path + '/';
                        }
                        finalPath += pages[i].name + '.html';
                        $searchEngine.indexPage({
                            infos: pages[i],
                            rawData: htmlData,
                            url: finalPath
                        });
                        fs.outputFile(path.resolve(finalPath), htmlData, function (err) {
                            if (err) {
                                logger.error('Error during ' + pages[i].name + ' page generation');
                            } else {
                                i++;
                                loop();
                            }
                        });
                    }, (errorMessage) => {
                        logger.error(errorMessage);
                    });
                } else {
                    $searchEngine.generateSearchIndexJson(this.configuration.mainData.output).then(() => {
                        if (this.configuration.mainData.assetsFolder !== '') {
                            this.processAssetsFolder();
                        }
                        this.processResources();
                    }, (e) => {
                        logger.error(e);
                    });
                }
            };
        loop();
    }

    processAssetsFolder() {
        logger.info('Copy assets folder');

        if (!fs.existsSync(this.configuration.mainData.assetsFolder)) {
            logger.error(`Provided assets folder ${this.configuration.mainData.assetsFolder} did not exist`);
        } else {
            let that = this;
            fs.copy(path.resolve(this.configuration.mainData.assetsFolder), path.resolve(process.cwd() + path.sep + this.configuration.mainData.output + path.sep + this.configuration.mainData.assetsFolder), function (err) {
                if(err) {
                    logger.error('Error during resources copy ', err);
                }
            });
        }
    }

    processResources() {
        logger.info('Copy main resources');
        let that = this;
        fs.copy(path.resolve(__dirname + '/../src/resources/'), path.resolve(process.cwd() + path.sep + this.configuration.mainData.output), function (err) {
            if(err) {
                logger.error('Error during resources copy ', err);
            }
            else {
                if (that.configuration.mainData.extTheme) {
                    fs.copy(path.resolve(process.cwd() + path.sep + that.configuration.mainData.extTheme), path.resolve(process.cwd() + path.sep + that.configuration.mainData.output + '/styles/'), function (err) {
                        if (err) {
                            logger.error('Error during external styling theme copy ', err);
                        } else {
                            logger.info('External styling theme copy succeeded');
                            that.processGraphs();
                        }
                    });
                }
                else {
                    that.processGraphs();
                }
            }
        });
    }

    processGraphs() {

        const onComplete = () => {
            let finalTime = (new Date() - startTime) / 1000;
            logger.info('Documentation generated in ' + this.configuration.mainData.output + ' in ' + finalTime + ' seconds using ' + this.configuration.mainData.theme + ' theme');
            if (this.configuration.mainData.serve) {
                logger.info(`Serving documentation from ${this.configuration.mainData.output} at http://127.0.0.1:${this.configuration.mainData.port}`);
                this.runWebServer(this.configuration.mainData.output);
            }
        };

        if (this.configuration.mainData.disableGraph) {

            logger.info('Graph generation disabled');
            onComplete();

        } else {

            logger.info('Process main graph');
            let modules = this.configuration.mainData.modules,
              i = 0,
              len = modules.length,
              loop = () => {
                  if( i <= len-1) {
                      logger.info('Process module graph', modules[i].name);
                      let finalPath = this.configuration.mainData.output;
                      if(this.configuration.mainData.output.lastIndexOf('/') === -1) {
                          finalPath += '/';
                      }
                      finalPath += 'modules/' + modules[i].name;
                      $ngdengine.renderGraph(modules[i].file, finalPath, 'f', modules[i].name).then(() => {
                          i++;
                          loop();
                      }, (errorMessage) => {
                          logger.error(errorMessage);
                      });
                  } else {
                      onComplete();
                  }
              };
            let finalMainGraphPath = this.configuration.mainData.output;
            if(finalMainGraphPath.lastIndexOf('/') === -1) {
                finalMainGraphPath += '/';
            }
            finalMainGraphPath += 'graph';
            $ngdengine.renderGraph(this.configuration.mainData.tsconfig, path.resolve(finalMainGraphPath), 'p').then(() => {
                loop();
            }, (err) => {
                logger.error('Error during graph generation: ', err);
            });

        }
    }

    runWebServer(folder) {
        LiveServer.start({
            root: folder,
            open: this.configuration.mainData.open,
            quiet: true,
            logLevel: 0,
            port: this.configuration.mainData.port
        });
    }

    /**
     * Return the application / root component instance.
     */
    get application():Application {
        return this;
    }


    get isCLI():boolean {
        return false;
    }
}