import sys,os
import webbrowser

from fluents import logger, plots,workflow,dataset
from fluents.lib import blmfuncs,nx_utils,validation,engines,cx_stats,cx_utils
import gobrowser, geneontology
import scipy
import networkx as nx


class SmallTestWorkflow(workflow.Workflow):
    name = 'Smokers'
    ident = 'smokers'
    description = 'A small test workflow for gene expression analysis.'

    def __init__(self, app):
        workflow.Workflow.__init__(self, app)        

        # DATA IMPORT
        load = workflow.Stage('load', 'Data')
        load.add_function(DatasetLoadFunctionSmokerSmall())
        load.add_function(DatasetLoadFunctionSmokerMedium())
        load.add_function(DatasetLoadFunctionSmokerFull())
        #load.add_function(DatasetLoadFunctionCYCLE())
        self.add_stage(load)
        
        # PREPROCESSING
        prep = workflow.Stage('prep', 'Preprocessing')
        prep.add_function(LogFunction())
        self.add_stage(prep)

        # NETWORK PREPROCESSING
        net = workflow.Stage('net', 'Network integration')
        net.add_function(DiffKernelFunction())
        net.add_function(ModKernelFunction())
        #net.add_function(RandDiffKernelFunction())
        self.add_stage(net)
        
        # BLM's
        model = workflow.Stage('models', 'Models')
        model.add_function(blmfuncs.PCA())
        model.add_function(blmfuncs.PLS())
        
        #model.add_function(bioconFuncs.SAM(app))
        self.add_stage(model)
        
        query = workflow.Stage('query', 'Gene Query')
        query.add_function(NCBIQuery())
        query.add_function(KEGGQuery())
        self.add_stage(query)
        
        # Gene Ontology
        go = workflow.Stage('go', 'Gene Ontology')
        go.add_function(gobrowser.LoadGOFunction())
        go.add_function(gobrowser.GOWeightFunction())
        go.add_function(gobrowser.DistanceToSelectionFunction())
        go.add_function(gobrowser.TTestFunction())
        self.add_stage(go)

        # EXTRA PLOTS
        #plt = workflow.Stage('net', 'Network')
        #plt.add_function(nx_analyser.KeggNetworkAnalyser())
        #self.add_stage(plt)
        
        logger.log('debug', 'Small test workflow is now active')


class DatasetLoadFunctionSmokerSmall(workflow.Function):
    """Loader for all ftsv files of smokers small datasets."""
    def __init__(self):
        workflow.Function.__init__(self, 'load_small', 'Smoker (Small)')

    def run(self):
        path = 'data/smokers-small/'
        files = os.listdir(path)
        out = []
        for fname in files:
            if fname.endswith('.ftsv'):
                input_file = open(os.path.join(path, fname))
                out.append(dataset.read_ftsv(input_file))
        return out


class DatasetLoadFunctionSmokerMedium(workflow.Function):
    """Loader for all ftsv files of smokers small datasets."""
    def __init__(self):
        workflow.Function.__init__(self, 'load_medium', 'Smoker (Medium)')

    def run(self):
        path = 'data/smokers-medium/'
        files = os.listdir(path)
        out = []
        for fname in files:
            if fname.endswith('.ftsv'):
                input_file = open(os.path.join(path, fname))
                out.append(dataset.read_ftsv(input_file))
        return out


class DatasetLoadFunctionSmokerFull(workflow.Function):
    """Loader for all ftsv files of smokers small datasets."""
    def __init__(self):
        workflow.Function.__init__(self, 'load_full', 'Smoker (Full)')

    def run(self):
        path = 'data/smokers-full/'
        files = os.listdir(path)
        out = []
        for fname in files:
            if fname.endswith('.ftsv'):
                input_file = open(os.path.join(path, fname))
                out.append(dataset.read_ftsv(input_file))
        return out


class DatasetLoadFunctionCYCLE(workflow.Function):
    """Loader for pickled CYCLE datasets."""
    def __init__(self):
        workflow.Function.__init__(self, 'load_data', 'Cycle')

    def run(self):
        filename='fluents/data/CYCLE'
        if filename:
            return dataset.from_file(filename)            


##### WORKFLOW SPECIFIC FUNCTIONS ######

        
class DiffKernelFunction(workflow.Function):
    def __init__(self):
        workflow.Function.__init__(self, 'diffkernel', 'Diffusion')

    def run(self, x, a):
        """x is gene expression data, a is the network.
        """
        #sanity check:
        g = a.asnetworkx()
        genes = x.get_identifiers(x.get_dim_name(1), sorted=True)
        W = nx.adj_matrix(g, nodelist=genes)
        X = x.asarray()
        Xc, mn_x = cx_utils.mat_center(X, ret_mn=True)
        out = []
        alpha=1.0
        beta = 1.0
        K = nx_utils.K_diffusion(W, alpha=alpha, beta=beta,normalised=True)
        Xp = scipy.dot(Xc, K) + mn_x
        # dataset
        row_ids = (x.get_dim_name(0),
                   x.get_identifiers(x.get_dim_name(0),
                                     sorted=True))
        col_ids = (x.get_dim_name(1),
                   x.get_identifiers(x.get_dim_name(1),
                                     sorted=True))
        
        xout = dataset.Dataset(Xp,
                               (row_ids, col_ids),
                               name=x.get_name()+'_diff'+str(alpha))
        out.append(xout)
        
        return out


class RandDiffKernelFunction(workflow.Function):
    def __init__(self):
        workflow.Function.__init__(self, 'diffkernel', 'Rand. Diff.')

    def run(self, x, a):
        """x is gene expression data, a is the network.
        """
        #sanity check:
        g = a.asnetworkx()
        genes = x.get_identifiers(x.get_dim_name(1))
        # randomise nodelist
        genes = [genes[i] for i in cx_utils.randperm(x.shape[1])]
        W = nx.adj_matrix(g, nodelist=genes)
        X = x.asarray()
        Xc, mn_x = cx_utils.mat_center(X, ret_mn=True)
        out = []
        alpha=1.
        beta = 1.0
        K = nx_utils.K_diffusion(W, alpha=alpha, beta=beta,normalised=True)

        Xp = scipy.dot(Xc, K) + mn_x
        # dataset
        row_ids = (x.get_dim_name(0),
                   x.get_identifiers(x.get_dim_name(0),
                                     sorted=True))
        col_ids = (x.get_dim_name(1),
                   x.get_identifiers(x.get_dim_name(1),
                                     sorted=True))
        
        xout = dataset.Dataset(Xp,
                               (row_ids, col_ids),
                               name=x.get_name()+'_diff'+str(alpha))
        out.append(xout)
        
        return out
    

class ModKernelFunction(workflow.Function):
    def __init__(self):
        workflow.Function.__init__(self, 'mokernel', 'Modularity')

    def run(self,x,a):
        X = x.asarray()
        g = a.asnetworkx()
        genes = x.get_identifiers(x.get_dim_name(1), sorted=True)
        W = nx.adj_matrix(g, nodelist=genes)
        out=[]
        alpha=.2
        Xc,mn_x = cx_utils.mat_center(X, ret_mn=True)
        K = nx_utils.K_modularity(W, alpha=alpha)
        Xp = scipy.dot(Xc, K)
        Xp = Xp + mn_x
        
        # dataset
        row_ids = (x.get_dim_name(0),
                   x.get_identifiers(x.get_dim_name(0),
                                     sorted=True))
        col_ids = (x.get_dim_name(1),
                   x.get_identifiers(x.get_dim_name(1),
                                     sorted=True))
        xout = dataset.Dataset(Xp,
                               (row_ids,col_ids),
                               name=x.get_name()+'_mod'+str(alpha))
        out.append(xout)
        return out


class NCBIQuery(workflow.Function):
    def __init__(self):
        workflow.Function.__init__(self, 'query', 'NCBI')

    def run(self, selection):
        base = 'http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?'
        options = {r'&db=' : 'gene',
                   r'&cmd=' : 'retrieve',
                   r'&dopt=' : 'full_report'}
        gene_str = ''.join([gene + "+" for gene in selection['gene_id']])
        options[r'&list_uids='] = gene_str[:-1]
        opt_str = ''.join([key+value for key,value in options.items()])
        web_str = base + opt_str
        webbrowser.open(web_str)


class KEGGQuery(workflow.Function):
    def __init__(self):
        workflow.Function.__init__(self, 'query', 'KEGG')

    def run(self, selection):
        if not selection.has_key('genes') \
               or not selection.has_key('orfs'):
            return None
        
        base = r'http://www.genome.jp/dbget-bin/www_bget?'
        options = {'org' : 'gene'}
        org = 'hsa'
        gene_str = ''.join([gene + "+" for gene in selection['gene_id']])
        gene_str = gene_str[:-1]
        gene_str = org + "+" + gene_str
        web_str = base + gene_str
        webbrowser.open(web_str)


class LogFunction(workflow.Function):
    def __init__(self):
        workflow.Function.__init__(self, 'log', 'Log')

    def run(self, data):
        logger.log('notice', 'Taking the log of dataset %s' % data.get_name())
        d = data.copy()
        d._array = scipy.log(d._array)
        d._name = 'log(%s)' % data.get_name()
        return [d]