var fs = require("fs");
var glob = require("glob");
var inquirer = require('inquirer');
var path = require("path");
var plist = require("plist");
var xcode = require("xcode");

var package = require('../../../../../package.json');

var ignoreNodeModules = { ignore: "node_modules/**" };
var appDelegatePaths = glob.sync("**/AppDelegate.+(mm|m)", ignoreNodeModules);

// Fix for https://github.com/Microsoft/react-native-code-push/issues/477
// Typical location of AppDelegate.m for newer RN versions: $PROJECT_ROOT/ios/<project_name>/AppDelegate.m
// Let's try to find that path by filtering the whole array for any path containing <project_name>
// If we can't find it there, play dumb and pray it is the first path we find.
var appDelegatePath = findFileByAppName(appDelegatePaths, package ? package.name : null) || appDelegatePaths[0];

if (!appDelegatePath) {
    console.log(`Couldn't find AppDelegate. You might need to update it manually \
Please refer to plugin configuration section for iOS at \
https://github.com/microsoft/react-native-code-push#plugin-configuration-ios`);
    return;
}

var appDelegateContents = fs.readFileSync(appDelegatePath, "utf8");

// 1. Add the header import statement
var codePushHeaderImportStatement = `#import <CodePush/CodePush.h>`;
if (~appDelegateContents.indexOf(codePushHeaderImportStatement)) {
    console.log(`"CodePush.h" header already imported.`);
} else {
    var appDelegateHeaderImportStatement = `#import "AppDelegate.h"`;
    appDelegateContents = appDelegateContents.replace(appDelegateHeaderImportStatement,
        `${appDelegateHeaderImportStatement}\n${codePushHeaderImportStatement}`);
}

// 2. Modify jsCodeLocation value assignment
var oldJsCodeLocationAssignmentStatement = appDelegateContents.match(/(jsCodeLocation = .*)/)[1];
var newJsCodeLocationAssignmentStatement = "jsCodeLocation = [CodePush bundleURL];";
if (~appDelegateContents.indexOf(newJsCodeLocationAssignmentStatement)) {
    console.log(`"jsCodeLocation" already pointing to "[CodePush bundleURL]".`);
} else {
    var jsCodeLocationPatch = `
#ifdef DEBUG
    ${oldJsCodeLocationAssignmentStatement}
#else
    ${newJsCodeLocationAssignmentStatement}
#endif`;
    appDelegateContents = appDelegateContents.replace(oldJsCodeLocationAssignmentStatement,
        jsCodeLocationPatch);
}

var plistPath = getPlistPath();

if (!plistPath) {
    console.log(`Couldn't find .plist file. You might need to update it manually \
Please refer to plugin configuration section for iOS at \
https://github.com/microsoft/react-native-code-push#plugin-configuration-ios`);
    return;
}

var plistContents = fs.readFileSync(plistPath, "utf8");

// 3. Add CodePushDeploymentKey to plist file
var parsedInfoPlist = plist.parse(plistContents);
if (parsedInfoPlist.CodePushDeploymentKey) {
    console.log(`"CodePushDeploymentKey" already specified in the plist file.`);
    writePatches();
} else {
    inquirer.prompt({
        "type": "input",
        "name": "iosDeploymentKey",
        "message": "What is your CodePush deployment key for iOS (hit <ENTER> to ignore)"
    }).then(function(answer) {
        parsedInfoPlist.CodePushDeploymentKey = answer.iosDeploymentKey || "deployment-key-here";
        plistContents = plist.build(parsedInfoPlist);

        writePatches();
    });
}

function writePatches() {
    fs.writeFileSync(appDelegatePath, appDelegateContents);
    fs.writeFileSync(plistPath, plistContents);
}

// Helper that filters an array with AppDelegate.m paths for a path with the app name inside it
// Should cover nearly all cases
function findFileByAppName(array, appName) {
    if (array.length === 0 || !appName) return null;

    for (var i = 0; i < array.length; i++) {
        var path = array[i];
        if (path && path.indexOf(appName) !== -1) {
            return path;
        }
    }

    return null;
}

function getDefaultPlistPath() {
    //this is old logic in case we are unable to find PLIST from xcode/pbxproj - at least we can fallback to default solution
    return glob.sync(`**/${package.name}/*Info.plist`, ignoreNodeModules)[0];
}

// This is enhanced version of standard implementation of xcode 'getBuildProperty' function  
// but allows us to narrow results by PRODUCT_NAME property also. 
// So we suppose that proj name should be the same as package name, otherwise fallback to default plist path searching logic
function getBuildSettingsPropertyMatchingTargetProductName(parsedXCodeProj, prop, targetProductName, build){
    var target;
    var COMMENT_KEY = /_comment$/;
    var PRODUCT_NAME_PROJECT_KEY = 'PRODUCT_NAME';

    if (!targetProductName){
        return target;
    }

    var configs = parsedXCodeProj.pbxXCBuildConfigurationSection();
    for (var configName in configs) {
        if (!COMMENT_KEY.test(configName)) {
            var config = configs[configName];
            if ( (build && config.name === build) || (build === undefined) ) {
                if (config.buildSettings[prop] !== undefined && config.buildSettings[PRODUCT_NAME_PROJECT_KEY] == targetProductName) {
                    target = config.buildSettings[prop];
                }
            }
        }
    }
    return target;
}

function getPlistPath(){
    var xcodeProjectPaths = glob.sync(`**/*.xcodeproj/project.pbxproj`, ignoreNodeModules);
    if (!xcodeProjectPaths){
        return getDefaultPlistPath();
    }

    if (xcodeProjectPaths.length !== 1) {
        console.log('Could not determine correct xcode proj path to retrieve related plist file, there are multiple xcodeproj under the solution.');
        return getDefaultPlistPath();
    }

    var xcodeProjectPath = xcodeProjectPaths[0];
    var parsedXCodeProj;

    try {
        var proj = xcode.project(xcodeProjectPath);      
        //use sync version because there are some problems with async version of xcode lib as of current version
        parsedXCodeProj = proj.parseSync();
    }
    catch(e) {
        console.log('Couldn\'t read info.plist path from xcode project - error: ' + e.message);
        return getDefaultPlistPath();
    }

    var INFO_PLIST_PROJECT_KEY = 'INFOPLIST_FILE';
    var RELEASE_BUILD_PROPERTY_NAME = "Release";
    var targetProductName = package ? package.name : null;

    //Try to get 'Release' build of ProductName matching the package name first and if it doesn't exist then try to get any other if existing
    var plistPathValue = getBuildSettingsPropertyMatchingTargetProductName(parsedXCodeProj, INFO_PLIST_PROJECT_KEY, targetProductName, RELEASE_BUILD_PROPERTY_NAME) || 
        getBuildSettingsPropertyMatchingTargetProductName(parsedXCodeProj, INFO_PLIST_PROJECT_KEY, targetProductName) ||
         parsedXCodeProj.getBuildProperty(INFO_PLIST_PROJECT_KEY, RELEASE_BUILD_PROPERTY_NAME) || 
         parsedXCodeProj.getBuildProperty(INFO_PLIST_PROJECT_KEY);

    if (!plistPathValue){
        return getDefaultPlistPath();
    }

    return path.resolve(path.dirname(xcodeProjectPath), '..', plistPathValue);    
}