################################
# val: number(float)/string(str)/sql(dict)
# col_unit: (agg_id, col_id, isDistinct(bool))
# val_unit: (unit_op, col_unit1, col_unit2)
# table_unit: (table_type, col_unit/sql)
# cond_unit: (not_op, op_id, val_unit, val1, val2)
# condition: [cond_unit1, 'and'/'or', cond_unit2, ...]
# sql {
#   'select': (isDistinct(bool), [(agg_id, val_unit), (agg_id, val_unit), ...])
#   'from': {'table_units': [table_unit1, table_unit2, ...], 'conds': condition}
#   'where': condition
#   'groupBy': [col_unit1, col_unit2, ...]
#   'orderBy': ('asc'/'desc', [val_unit1, val_unit2, ...])
#   'having': condition
#   'limit': None/limit value
#   'intersect': None/sql
#   'except': None/sql
#   'union': None/sql
# }
################################

import os
import json
import sqlite3
import argparse

from seq2struct.datasets.spider_lib.process_sql import get_schema, Schema, get_sql

# Flag to disable value evaluation
DISABLE_VALUE = True
# Flag to disable distinct in select evaluation
DISABLE_DISTINCT = True


CLAUSE_KEYWORDS = ('select', 'from', 'where', 'group', 'order', 'limit', 'intersect', 'union', 'except')
JOIN_KEYWORDS = ('join', 'on', 'as')

WHERE_OPS = ('not', 'between', '=', '>', '<', '>=', '<=', '!=', 'in', 'like', 'is', 'exists')
UNIT_OPS = ('none', '-', '+', "*", '/')
AGG_OPS = ('none', 'max', 'min', 'count', 'sum', 'avg')
TABLE_TYPE = {
    'sql': "sql",
    'table_unit': "table_unit",
}

COND_OPS = ('and', 'or')
SQL_OPS = ('intersect', 'union', 'except')
ORDER_OPS = ('desc', 'asc')


HARDNESS = {
    "component1": ('where', 'group', 'order', 'limit', 'join', 'or', 'like'),
    "component2": ('except', 'union', 'intersect')
}

LEVELS = ['easy', 'medium', 'hard', 'extra', 'all']
PARTIAL_TYPES = ['select', 'select(no AGG)', 'where', 'where(no OP)', 'group(no Having)',
                 'group', 'order', 'and/or', 'IUEN', 'keywords']

def condition_has_or(conds):
    return 'or' in conds[1::2]


def condition_has_like(conds):
    return WHERE_OPS.index('like') in [cond_unit[1] for cond_unit in conds[::2]]


def condition_has_sql(conds):
    for cond_unit in conds[::2]:
        val1, val2 = cond_unit[3], cond_unit[4]
        if val1 is not None and type(val1) is dict:
            return True
        if val2 is not None and type(val2) is dict:
            return True
    return False


def val_has_op(val_unit):
    return val_unit[0] != UNIT_OPS.index('none')


def has_agg(unit):
    return unit[0] != AGG_OPS.index('none')


def accuracy(count, total):
    if count == total:
        return 1
    return 0


def recall(count, total):
    if count == total:
        return 1
    return 0


def F1(acc, rec):
    if (acc + rec) == 0:
        return 0
    return (2. * acc * rec) / (acc + rec)


def get_scores(count, pred_total, label_total):
    if pred_total != label_total:
        return 0,0,0
    elif count == pred_total:
        return 1,1,1
    return 0,0,0


def eval_sel(pred, label):
    pred_sel = pred['select'][1]
    label_sel = label['select'][1]
    label_wo_agg = [unit[1] for unit in label_sel]
    pred_total = len(pred_sel)
    label_total = len(label_sel)
    cnt = 0
    cnt_wo_agg = 0

    for unit in pred_sel:
        if unit in label_sel:
            cnt += 1
            label_sel.remove(unit)
        if unit[1] in label_wo_agg:
            cnt_wo_agg += 1
            label_wo_agg.remove(unit[1])

    return label_total, pred_total, cnt, cnt_wo_agg


def eval_where(pred, label):
    pred_conds = [unit for unit in pred['where'][::2]]
    label_conds = [unit for unit in label['where'][::2]]
    label_wo_agg = [unit[2] for unit in label_conds]
    pred_total = len(pred_conds)
    label_total = len(label_conds)
    cnt = 0
    cnt_wo_agg = 0

    for unit in pred_conds:
        if unit in label_conds:
            cnt += 1
            label_conds.remove(unit)
        if unit[2] in label_wo_agg:
            cnt_wo_agg += 1
            label_wo_agg.remove(unit[2])

    return label_total, pred_total, cnt, cnt_wo_agg


def eval_group(pred, label):
    pred_cols = [unit[1] for unit in pred['groupBy']]
    label_cols = [unit[1] for unit in label['groupBy']]
    pred_total = len(pred_cols)
    label_total = len(label_cols)
    cnt = 0
    pred_cols = [pred.split(".")[1] if "." in pred else pred for pred in pred_cols]
    label_cols = [label.split(".")[1] if "." in label else label for label in label_cols]
    for col in pred_cols:
        if col in label_cols:
            cnt += 1
            label_cols.remove(col)
    return label_total, pred_total, cnt


def eval_having(pred, label):
    pred_total = label_total = cnt = 0
    if len(pred['groupBy']) > 0:
        pred_total = 1
    if len(label['groupBy']) > 0:
        label_total = 1

    pred_cols = [unit[1] for unit in pred['groupBy']]
    label_cols = [unit[1] for unit in label['groupBy']]
    if pred_total == label_total == 1 \
            and pred_cols == label_cols \
            and pred['having'] == label['having']:
        cnt = 1

    return label_total, pred_total, cnt


def eval_order(pred, label):
    pred_total = label_total = cnt = 0
    if len(pred['orderBy']) > 0:
        pred_total = 1
    if len(label['orderBy']) > 0:
        label_total = 1
    if len(label['orderBy']) > 0 and pred['orderBy'] == label['orderBy'] and \
            ((pred['limit'] is None and label['limit'] is None) or (pred['limit'] is not None and label['limit'] is not None)):
        cnt = 1
    return label_total, pred_total, cnt


def eval_and_or(pred, label):
    pred_ao = pred['where'][1::2]
    label_ao = label['where'][1::2]
    pred_ao = set(pred_ao)
    label_ao = set(label_ao)

    if pred_ao == label_ao:
        return 1,1,1
    return len(pred_ao),len(label_ao),0


def get_nestedSQL(sql):
    nested = []
    for cond_unit in sql['from']['conds'][::2] + sql['where'][::2] + sql['having'][::2]:
        if type(cond_unit[3]) is dict:
            nested.append(cond_unit[3])
        if type(cond_unit[4]) is dict:
            nested.append(cond_unit[4])
    if sql['intersect'] is not None:
        nested.append(sql['intersect'])
    if sql['except'] is not None:
        nested.append(sql['except'])
    if sql['union'] is not None:
        nested.append(sql['union'])
    return nested


def eval_nested(pred, label):
    label_total = 0
    pred_total = 0
    cnt = 0
    if pred is not None:
        pred_total += 1
    if label is not None:
        label_total += 1
    if pred is not None and label is not None:
        partial_scores = Evaluator.eval_partial_match(pred, label)
        cnt += Evaluator.eval_exact_match(pred, label, partial_scores)
    return label_total, pred_total, cnt


def eval_IUEN(pred, label):
    lt1, pt1, cnt1 = eval_nested(pred['intersect'], label['intersect'])
    lt2, pt2, cnt2 = eval_nested(pred['except'], label['except'])
    lt3, pt3, cnt3 = eval_nested(pred['union'], label['union'])
    label_total = lt1 + lt2 + lt3
    pred_total = pt1 + pt2 + pt3
    cnt = cnt1 + cnt2 + cnt3
    return label_total, pred_total, cnt


def get_keywords(sql):
    res = set()
    if len(sql['where']) > 0:
        res.add('where')
    if len(sql['groupBy']) > 0:
        res.add('group')
    if len(sql['having']) > 0:
        res.add('having')
    if len(sql['orderBy']) > 0:
        res.add(sql['orderBy'][0])
        res.add('order')
    if sql['limit'] is not None:
        res.add('limit')
    if sql['except'] is not None:
        res.add('except')
    if sql['union'] is not None:
        res.add('union')
    if sql['intersect'] is not None:
        res.add('intersect')

    # or keyword
    ao = sql['from']['conds'][1::2] + sql['where'][1::2] + sql['having'][1::2]
    if len([token for token in ao if token == 'or']) > 0:
        res.add('or')

    cond_units = sql['from']['conds'][::2] + sql['where'][::2] + sql['having'][::2]
    # not keyword
    if len([cond_unit for cond_unit in cond_units if cond_unit[0]]) > 0:
        res.add('not')

    # in keyword
    if len([cond_unit for cond_unit in cond_units if cond_unit[1] == WHERE_OPS.index('in')]) > 0:
        res.add('in')

    # like keyword
    if len([cond_unit for cond_unit in cond_units if cond_unit[1] == WHERE_OPS.index('like')]) > 0:
        res.add('like')

    return res


def eval_keywords(pred, label):
    pred_keywords = get_keywords(pred)
    label_keywords = get_keywords(label)
    pred_total = len(pred_keywords)
    label_total = len(label_keywords)
    cnt = 0

    for k in pred_keywords:
        if k in label_keywords:
            cnt += 1
    return label_total, pred_total, cnt


def count_agg(units):
    return len([unit for unit in units if has_agg(unit)])


def count_component1(sql):
    count = 0
    if len(sql['where']) > 0:
        count += 1
    if len(sql['groupBy']) > 0:
        count += 1
    if len(sql['orderBy']) > 0:
        count += 1
    if sql['limit'] is not None:
        count += 1
    if len(sql['from']['table_units']) > 0:  # JOIN
        count += len(sql['from']['table_units']) - 1

    ao = sql['from']['conds'][1::2] + sql['where'][1::2] + sql['having'][1::2]
    count += len([token for token in ao if token == 'or'])
    cond_units = sql['from']['conds'][::2] + sql['where'][::2] + sql['having'][::2]
    count += len([cond_unit for cond_unit in cond_units if cond_unit[1] == WHERE_OPS.index('like')])

    return count


def count_component2(sql):
    nested = get_nestedSQL(sql)
    return len(nested)


def count_others(sql):
    count = 0
    # number of aggregation
    agg_count = count_agg(sql['select'][1])
    agg_count += count_agg(sql['where'][::2])
    agg_count += count_agg(sql['groupBy'])
    if len(sql['orderBy']) > 0:
        agg_count += count_agg([unit[1] for unit in sql['orderBy'][1] if unit[1]] +
                            [unit[2] for unit in sql['orderBy'][1] if unit[2]])
    agg_count += count_agg(sql['having'])
    if agg_count > 1:
        count += 1

    # number of select columns
    if len(sql['select'][1]) > 1:
        count += 1

    # number of where conditions
    if len(sql['where']) > 1:
        count += 1

    # number of group by clauses
    if len(sql['groupBy']) > 1:
        count += 1

    return count


class Evaluator:
    """A simple evaluator"""
    def __init__(self, db_dir, kmaps, etype):
        self.db_dir = db_dir
        self.kmaps = kmaps
        self.etype = etype

        self.db_paths = {}
        self.schemas = {}
        for db_name in self.kmaps.keys():
            db_path = os.path.join(db_dir, db_name, db_name + '.sqlite')
            self.db_paths[db_name] = db_path
            self.schemas[db_name] = Schema(get_schema(db_path))

        self.scores = {
            level: {
                'count': 0,
                'partial': {
                    type_: {'acc': 0., 'rec': 0., 'f1': 0.,'acc_count': 0,'rec_count': 0}
                    for type_ in PARTIAL_TYPES
                },
                'exact': 0.,
                'exec': 0,
            }
            for level in LEVELS
        }

    def eval_hardness(self, sql):
        count_comp1_ = count_component1(sql)
        count_comp2_ = count_component2(sql)
        count_others_ = count_others(sql)

        if count_comp1_ <= 1 and count_others_ == 0 and count_comp2_ == 0:
            return "easy"
        elif (count_others_ <= 2 and count_comp1_ <= 1 and count_comp2_ == 0) or \
                (count_comp1_ <= 2 and count_others_ < 2 and count_comp2_ == 0):
            return "medium"
        elif (count_others_ > 2 and count_comp1_ <= 2 and count_comp2_ == 0) or \
                (2 < count_comp1_ <= 3 and count_others_ <= 2 and count_comp2_ == 0) or \
                (count_comp1_ <= 1 and count_others_ == 0 and count_comp2_ <= 1):
            return "hard"
        else:
            return "extra"

    @classmethod
    def eval_exact_match(cls, pred, label, partial_scores):
        for _, score in list(partial_scores.items()):
            if score['f1'] != 1:
                return 0
        if len(label['from']['table_units']) > 0:
            label_tables = sorted(label['from']['table_units'])
            pred_tables = sorted(pred['from']['table_units'])
            return label_tables == pred_tables
        return 1

    @classmethod
    def eval_partial_match(cls, pred, label):
        res = {}

        label_total, pred_total, cnt, cnt_wo_agg = eval_sel(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['select'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}
        acc, rec, f1 = get_scores(cnt_wo_agg, pred_total, label_total)
        res['select(no AGG)'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt, cnt_wo_agg = eval_where(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['where'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}
        acc, rec, f1 = get_scores(cnt_wo_agg, pred_total, label_total)
        res['where(no OP)'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt = eval_group(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['group(no Having)'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt = eval_having(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['group'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt = eval_order(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['order'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt = eval_and_or(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['and/or'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt = eval_IUEN(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['IUEN'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        label_total, pred_total, cnt = eval_keywords(pred, label)
        acc, rec, f1 = get_scores(cnt, pred_total, label_total)
        res['keywords'] = {'acc': acc, 'rec': rec, 'f1': f1,'label_total':label_total,'pred_total':pred_total}

        return res

    def evaluate_one(self, db_name, gold, predicted):
        schema = self.schemas[db_name]
        g_sql = get_sql(schema, gold)
        hardness = self.eval_hardness(g_sql)
        self.scores[hardness]['count'] += 1
        self.scores['all']['count'] += 1

        parse_error = False
        try:
            p_sql = get_sql(schema, predicted)
        except:
            # If p_sql is not valid, then we will use an empty sql to evaluate with the correct sql
            p_sql = {
            "except": None,
            "from": {
                "conds": [],
                "table_units": []
            },
            "groupBy": [],
            "having": [],
            "intersect": None,
            "limit": None,
            "orderBy": [],
            "select": [
                False,
                []
            ],
            "union": None,
            "where": []
            }

            # TODO fix
            parse_error = True

        # rebuild sql for value evaluation
        kmap = self.kmaps[db_name]
        g_valid_col_units = build_valid_col_units(g_sql['from']['table_units'], schema)
        g_sql = rebuild_sql_val(g_sql)
        g_sql = rebuild_sql_col(g_valid_col_units, g_sql, kmap)
        p_valid_col_units = build_valid_col_units(p_sql['from']['table_units'], schema)
        p_sql = rebuild_sql_val(p_sql)
        p_sql = rebuild_sql_col(p_valid_col_units, p_sql, kmap)

        if self.etype in ["all", "exec"]:
            self.scores[hardness]['exec'] += eval_exec_match(self.db_paths[db_name], predicted, gold, p_sql, g_sql)

        if self.etype in ["all", "match"]:
            partial_scores = self.eval_partial_match(p_sql, g_sql)
            exact_score = self.eval_exact_match(p_sql, g_sql, partial_scores)
            self.scores[hardness]['exact'] += exact_score
            self.scores['all']['exact'] += exact_score
            for type_ in PARTIAL_TYPES:
                if partial_scores[type_]['pred_total'] > 0:
                    self.scores[hardness]['partial'][type_]['acc'] += partial_scores[type_]['acc']
                    self.scores[hardness]['partial'][type_]['acc_count'] += 1
                if partial_scores[type_]['label_total'] > 0:
                    self.scores[hardness]['partial'][type_]['rec'] += partial_scores[type_]['rec']
                    self.scores[hardness]['partial'][type_]['rec_count'] += 1
                self.scores[hardness]['partial'][type_]['f1'] += partial_scores[type_]['f1']
                if partial_scores[type_]['pred_total'] > 0:
                    self.scores['all']['partial'][type_]['acc'] += partial_scores[type_]['acc']
                    self.scores['all']['partial'][type_]['acc_count'] += 1
                if partial_scores[type_]['label_total'] > 0:
                    self.scores['all']['partial'][type_]['rec'] += partial_scores[type_]['rec']
                    self.scores['all']['partial'][type_]['rec_count'] += 1
                self.scores['all']['partial'][type_]['f1'] += partial_scores[type_]['f1']

        return {
            'predicted': predicted,
            'gold': gold,
            'predicted_parse_error': parse_error,
            'hardness': hardness,
            'exact': exact_score,
            'partial': partial_scores
        }

    def finalize(self):
        scores = self.scores
        for level in LEVELS:
            if scores[level]['count'] == 0:
                continue
            if self.etype in ["all", "exec"]:
                scores[level]['exec'] /= scores[level]['count']

            if self.etype in ["all", "match"]:
                scores[level]['exact'] /= scores[level]['count']
                for type_ in PARTIAL_TYPES:
                    if scores[level]['partial'][type_]['acc_count'] == 0:
                        scores[level]['partial'][type_]['acc'] = 0
                    else:
                        scores[level]['partial'][type_]['acc'] = scores[level]['partial'][type_]['acc'] / \
                                                                 scores[level]['partial'][type_]['acc_count'] * 1.0
                    if scores[level]['partial'][type_]['rec_count'] == 0:
                        scores[level]['partial'][type_]['rec'] = 0
                    else:
                        scores[level]['partial'][type_]['rec'] = scores[level]['partial'][type_]['rec'] / \
                                                                 scores[level]['partial'][type_]['rec_count'] * 1.0
                    if scores[level]['partial'][type_]['acc'] == 0 and scores[level]['partial'][type_]['rec'] == 0:
                        scores[level]['partial'][type_]['f1'] = 1
                    else:
                        scores[level]['partial'][type_]['f1'] = \
                            2.0 * scores[level]['partial'][type_]['acc'] * scores[level]['partial'][type_]['rec'] / (
                            scores[level]['partial'][type_]['rec'] + scores[level]['partial'][type_]['acc'])


def isValidSQL(sql, db):
    conn = sqlite3.connect(db)
    cursor = conn.cursor()
    try:
        cursor.execute(sql)
    except:
        return False
    return True


def print_scores(scores, etype):
    LEVELS = ['easy', 'medium', 'hard', 'extra', 'all']
    PARTIAL_TYPES = ['select', 'select(no AGG)', 'where', 'where(no OP)', 'group(no Having)',
                     'group', 'order', 'and/or', 'IUEN', 'keywords']

    print("{:20} {:20} {:20} {:20} {:20} {:20}".format("", *LEVELS))
    counts = [scores[level]['count'] for level in LEVELS]
    print("{:20} {:<20d} {:<20d} {:<20d} {:<20d} {:<20d}".format("count", *counts))

    if etype in ["all", "exec"]:
        print('=====================   EXECUTION ACCURACY     =====================')
        this_scores = [scores[level]['exec'] for level in LEVELS]
        print("{:20} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f}".format("execution", *this_scores))

    if etype in ["all", "match"]:
        print('\n====================== EXACT MATCHING ACCURACY =====================')
        exact_scores = [scores[level]['exact'] for level in LEVELS]
        print("{:20} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f}".format("exact match", *exact_scores))
        print('\n---------------------PARTIAL MATCHING ACCURACY----------------------')
        for type_ in PARTIAL_TYPES:
            this_scores = [scores[level]['partial'][type_]['acc'] for level in LEVELS]
            print("{:20} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f}".format(type_, *this_scores))

        print('---------------------- PARTIAL MATCHING RECALL ----------------------')
        for type_ in PARTIAL_TYPES:
            this_scores = [scores[level]['partial'][type_]['rec'] for level in LEVELS]
            print("{:20} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f}".format(type_, *this_scores))

        print('---------------------- PARTIAL MATCHING F1 --------------------------')
        for type_ in PARTIAL_TYPES:
            this_scores = [scores[level]['partial'][type_]['f1'] for level in LEVELS]
            print("{:20} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f} {:<20.3f}".format(type_, *this_scores))


def evaluate(gold, predict, db_dir, etype, kmaps):
    with open(gold, encoding='utf8') as f:
        glist = [l.strip().split('\t') for l in f.readlines() if len(l.strip()) > 0]

    with open(predict, encoding='utf8') as f:
        plist = [l.strip().split('\t') for l in f.readlines() if len(l.strip()) > 0]
    # plist = [("select max(Share),min(Share) from performance where Type != 'terminal'", "orchestra")]
    # glist = [("SELECT max(SHARE) ,  min(SHARE) FROM performance WHERE TYPE != 'Live final'", "orchestra")]
    evaluator = Evaluator(db_dir, kmaps, etype)
    results = []
    for p, g in zip(plist, glist):
        predicted, = p
        gold, db_name = g
        results.append(evaluator.evaluate_one(db_name, gold, predicted))
    evaluator.finalize()

    print_scores(evaluator.scores, etype)
    return {
        'per_item': results,
        'total_scores': evaluator.scores,
    }


def eval_exec_match(db, p_str, g_str, pred, gold):
    """
    return 1 if the values between prediction and gold are matching
    in the corresponding index. Currently not support multiple col_unit(pairs).
    """
    conn = sqlite3.connect(db)
    cursor = conn.cursor()
    try:
        cursor.execute(p_str)
        p_res = cursor.fetchall()
    except:
        return False

    cursor.execute(g_str)
    q_res = cursor.fetchall()

    def res_map(res, val_units):
        rmap = {}
        for idx, val_unit in enumerate(val_units):
            key = tuple(val_unit[1]) if not val_unit[2] else (val_unit[0], tuple(val_unit[1]), tuple(val_unit[2]))
            rmap[key] = [r[idx] for r in res]
        return rmap

    p_val_units = [unit[1] for unit in pred['select'][1]]
    q_val_units = [unit[1] for unit in gold['select'][1]]
    return res_map(p_res, p_val_units) == res_map(q_res, q_val_units)


# Rebuild SQL functions for value evaluation
def rebuild_cond_unit_val(cond_unit):
    if cond_unit is None or not DISABLE_VALUE:
        return cond_unit

    not_op, op_id, val_unit, val1, val2 = cond_unit
    if type(val1) is not dict:
        val1 = None
    else:
        val1 = rebuild_sql_val(val1)
    if type(val2) is not dict:
        val2 = None
    else:
        val2 = rebuild_sql_val(val2)
    return not_op, op_id, val_unit, val1, val2


def rebuild_condition_val(condition):
    if condition is None or not DISABLE_VALUE:
        return condition

    res = []
    for idx, it in enumerate(condition):
        if idx % 2 == 0:
            res.append(rebuild_cond_unit_val(it))
        else:
            res.append(it)
    return res


def rebuild_sql_val(sql):
    if sql is None or not DISABLE_VALUE:
        return sql

    sql['from']['conds'] = rebuild_condition_val(sql['from']['conds'])
    sql['having'] = rebuild_condition_val(sql['having'])
    sql['where'] = rebuild_condition_val(sql['where'])
    sql['intersect'] = rebuild_sql_val(sql['intersect'])
    sql['except'] = rebuild_sql_val(sql['except'])
    sql['union'] = rebuild_sql_val(sql['union'])

    return sql


# Rebuild SQL functions for foreign key evaluation
def build_valid_col_units(table_units, schema):
    col_ids = [table_unit[1] for table_unit in table_units if table_unit[0] == TABLE_TYPE['table_unit']]
    prefixs = [col_id[:-2] for col_id in col_ids]
    valid_col_units= []
    for value in list(schema.idMap.values()):
        if '.' in value and value[:value.index('.')] in prefixs:
            valid_col_units.append(value)
    return valid_col_units


def rebuild_col_unit_col(valid_col_units, col_unit, kmap):
    if col_unit is None:
        return col_unit

    agg_id, col_id, distinct = col_unit
    if col_id in kmap and col_id in valid_col_units:
        col_id = kmap[col_id]
    if DISABLE_DISTINCT:
        distinct = None
    return agg_id, col_id, distinct


def rebuild_val_unit_col(valid_col_units, val_unit, kmap):
    if val_unit is None:
        return val_unit

    unit_op, col_unit1, col_unit2 = val_unit
    col_unit1 = rebuild_col_unit_col(valid_col_units, col_unit1, kmap)
    col_unit2 = rebuild_col_unit_col(valid_col_units, col_unit2, kmap)
    return unit_op, col_unit1, col_unit2


def rebuild_table_unit_col(valid_col_units, table_unit, kmap):
    if table_unit is None:
        return table_unit

    table_type, col_unit_or_sql = table_unit
    if isinstance(col_unit_or_sql, tuple):
        col_unit_or_sql = rebuild_col_unit_col(valid_col_units, col_unit_or_sql, kmap)
    return table_type, col_unit_or_sql


def rebuild_cond_unit_col(valid_col_units, cond_unit, kmap):
    if cond_unit is None:
        return cond_unit

    not_op, op_id, val_unit, val1, val2 = cond_unit
    val_unit = rebuild_val_unit_col(valid_col_units, val_unit, kmap)
    return not_op, op_id, val_unit, val1, val2


def rebuild_condition_col(valid_col_units, condition, kmap):
    for idx in range(len(condition)):
        if idx % 2 == 0:
            condition[idx] = rebuild_cond_unit_col(valid_col_units, condition[idx], kmap)
    return condition


def rebuild_select_col(valid_col_units, sel, kmap):
    if sel is None:
        return sel
    distinct, _list = sel
    new_list = []
    for it in _list:
        agg_id, val_unit = it
        new_list.append((agg_id, rebuild_val_unit_col(valid_col_units, val_unit, kmap)))
    if DISABLE_DISTINCT:
        distinct = None
    return distinct, new_list


def rebuild_from_col(valid_col_units, from_, kmap):
    if from_ is None:
        return from_

    from_['table_units'] = [rebuild_table_unit_col(valid_col_units, table_unit, kmap) for table_unit in from_['table_units']]
    from_['conds'] = rebuild_condition_col(valid_col_units, from_['conds'], kmap)
    return from_


def rebuild_group_by_col(valid_col_units, group_by, kmap):
    if group_by is None:
        return group_by

    return [rebuild_col_unit_col(valid_col_units, col_unit, kmap) for col_unit in group_by]


def rebuild_order_by_col(valid_col_units, order_by, kmap):
    if order_by is None or len(order_by) == 0:
        return order_by

    direction, val_units = order_by
    new_val_units = [rebuild_val_unit_col(valid_col_units, val_unit, kmap) for val_unit in val_units]
    return direction, new_val_units


def rebuild_sql_col(valid_col_units, sql, kmap):
    if sql is None:
        return sql

    sql['select'] = rebuild_select_col(valid_col_units, sql['select'], kmap)
    sql['from'] = rebuild_from_col(valid_col_units, sql['from'], kmap)
    sql['where'] = rebuild_condition_col(valid_col_units, sql['where'], kmap)
    sql['groupBy'] = rebuild_group_by_col(valid_col_units, sql['groupBy'], kmap)
    sql['orderBy'] = rebuild_order_by_col(valid_col_units, sql['orderBy'], kmap)
    sql['having'] = rebuild_condition_col(valid_col_units, sql['having'], kmap)
    sql['intersect'] = rebuild_sql_col(valid_col_units, sql['intersect'], kmap)
    sql['except'] = rebuild_sql_col(valid_col_units, sql['except'], kmap)
    sql['union'] = rebuild_sql_col(valid_col_units, sql['union'], kmap)

    return sql


def build_foreign_key_map(entry):
    cols_orig = entry["column_names_original"]
    tables_orig = entry["table_names_original"]

    # rebuild cols corresponding to idmap in Schema
    cols = []
    for col_orig in cols_orig:
        if col_orig[0] >= 0:
            t = tables_orig[col_orig[0]]
            c = col_orig[1]
            cols.append("__" + t.lower() + "." + c.lower() + "__")
        else:
            cols.append("__all__")

    def keyset_in_list(k1, k2, k_list):
        for k_set in k_list:
            if k1 in k_set or k2 in k_set:
                return k_set
        new_k_set = set()
        k_list.append(new_k_set)
        return new_k_set

    foreign_key_list = []
    foreign_keys = entry["foreign_keys"]
    for fkey in foreign_keys:
        key1, key2 = fkey
        key_set = keyset_in_list(key1, key2, foreign_key_list)
        key_set.add(key1)
        key_set.add(key2)

    foreign_key_map = {}
    for key_set in foreign_key_list:
        sorted_list = sorted(list(key_set))
        midx = sorted_list[0]
        for idx in sorted_list:
            foreign_key_map[cols[idx]] = cols[midx]

    return foreign_key_map


def build_foreign_key_map_from_json(table):
    with open(table, encoding='utf8') as f:
        data = json.load(f)
    tables = {}
    for entry in data:
        tables[entry['db_id']] = build_foreign_key_map(entry)
    return tables


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument('--gold', dest='gold', type=str)
    parser.add_argument('--pred', dest='pred', type=str)
    parser.add_argument('--db', dest='db', type=str)
    parser.add_argument('--table', dest='table', type=str)
    parser.add_argument('--etype', dest='etype', type=str)
    parser.add_argument('--output')
    args = parser.parse_args()

    gold = args.gold
    pred = args.pred
    db_dir = args.db
    table = args.table
    etype = args.etype

    assert etype in ["all", "exec", "match"], "Unknown evaluation method"

    kmaps = build_foreign_key_map_from_json(table)

    results = evaluate(gold, pred, db_dir, etype, kmaps)
    if args.output:
        with open(args.output, 'w', encoding='utf8') as f:
            json.dump(results, f, ensure_ascii=False)