var SwaggerParser = require('swagger-parser'),
    _             = require('underscore');

function check_duplicate_operationids(api) {
    var operation_ids = [];

    _.each(api.paths, function(endpoint) {
        _.each(endpoint, function(value) {
            var operation_id = value.operationId;
            if(operation_id !== undefined) {
                if(operation_ids.indexOf(operation_id) >= 0) {
                    console.error('In', file + ':');
                    console.error('Duplicate operationId:', operation_id);
                    process.exitCode = 1;
                } else {
                    operation_ids.push(operation_id);
                }
            }
        });
    });
}

function validate_swagger(file) {
    SwaggerParser.validate(file)
        .then(function(api) {
            // Let's make sure that there aren't any duplicate operationids,
            // until this issue is fixed:
            // https://github.com/BigstickCarpet/swagger-parser/issues/68
            check_duplicate_operationids(api);
            return;
        })
        .catch(function(err) {
            // There is something wrong. Display the validation errors
            console.error('In', file + ':');
            console.error(err.message);
            process.exitCode = 1;
        });
}

// Iterate through the changed files, passed in the arguments.
// The two first arguments are the call to the Node interpreter and this
// script, hence the starting point at 2.
for(var i = 2; i < process.argv.length; i++) {
    var file = process.argv[i];
    // Run the validator only for YAML files inside static/swagger
    if(file.startsWith('static/swagger')) {
        validate_swagger(file);
    }
}