package com.andrewkydev.database.schema;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public final class TableSpec {
    private final String name;
    private final List<ColumnSpec> columns;
    private final List<String> primaryKey;
    private final List<IndexSpec> indexes;

    private TableSpec(Builder builder) {
        this.name = builder.name;
        this.columns = Collections.unmodifiableList(new ArrayList<>(builder.columns));
        this.primaryKey = Collections.unmodifiableList(new ArrayList<>(builder.primaryKey));
        this.indexes = Collections.unmodifiableList(new ArrayList<>(builder.indexes));
    }

    public static Builder builder(String name) {
        return new Builder(name);
    }

    public String name() {
        return name;
    }

    public List<ColumnSpec> columns() {
        return columns;
    }

    public List<String> primaryKey() {
        return primaryKey;
    }

    public List<IndexSpec> indexes() {
        return indexes;
    }

    public static final class Builder {
        private final String name;
        private final List<ColumnSpec> columns = new ArrayList<>();
        private final List<String> primaryKey = new ArrayList<>();
        private final List<IndexSpec> indexes = new ArrayList<>();

        private Builder(String name) {
            this.name = name;
        }

        public Builder column(ColumnSpec column) {
            this.columns.add(column);
            return this;
        }

        public Builder columns(List<ColumnSpec> columns) {
            this.columns.addAll(columns);
            return this;
        }

        public Builder primaryKey(List<String> columns) {
            this.primaryKey.clear();
            this.primaryKey.addAll(columns);
            return this;
        }

        public Builder index(IndexSpec index) {
            this.indexes.add(index);
            return this;
        }

        public Builder indexes(List<IndexSpec> indexes) {
            this.indexes.addAll(indexes);
            return this;
        }

        public TableSpec build() {
            return new TableSpec(this);
        }
    }
}