-- Create comments table
CREATE TABLE IF NOT EXISTS comments (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    target_type VARCHAR(30) NOT NULL,
    target_id VARCHAR(128) NOT NULL,
    user_id BIGINT NOT NULL,
    parent_id BIGINT,
    content TEXT NOT NULL,
    status VARCHAR(20) NOT NULL DEFAULT 'visible',
    spam_score REAL NOT NULL DEFAULT 0,
    spam_rules TEXT,
    is_edited BOOLEAN NOT NULL DEFAULT FALSE,
    edited_at TIMESTAMP WITH TIME ZONE,
    CONSTRAINT fk_comments_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    CONSTRAINT fk_comments_parent FOREIGN KEY (parent_id) REFERENCES comments(id) ON DELETE CASCADE
);

CREATE INDEX idx_comments_target ON comments(target_type, target_id);
CREATE INDEX idx_comments_user ON comments(user_id);
CREATE INDEX idx_comments_parent ON comments(parent_id);
CREATE INDEX idx_comments_status ON comments(status);
CREATE INDEX idx_comments_created ON comments(created_at DESC);
CREATE INDEX idx_comments_spam ON comments(spam_score DESC) WHERE spam_score > 0.5;

-- Create comment bans table
CREATE TABLE IF NOT EXISTS comment_bans (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    user_id BIGINT NOT NULL,
    reason TEXT,
    until TIMESTAMP WITH TIME ZONE,
    created_by_id BIGINT NOT NULL,
    CONSTRAINT fk_bans_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    CONSTRAINT fk_bans_creator FOREIGN KEY (created_by_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE INDEX idx_comment_bans_user ON comment_bans(user_id);
CREATE INDEX idx_comment_bans_until ON comment_bans(until);
CREATE INDEX idx_comment_bans_creator ON comment_bans(created_by_id);

-- Create unban requests table
CREATE TABLE IF NOT EXISTS unban_requests (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    user_id BIGINT NOT NULL,
    message TEXT,
    status VARCHAR(20) NOT NULL DEFAULT 'pending',
    resolved_by_id BIGINT,
    resolved_at TIMESTAMP WITH TIME ZONE,
    CONSTRAINT fk_unban_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    CONSTRAINT fk_unban_resolver FOREIGN KEY (resolved_by_id) REFERENCES users(id) ON DELETE SET NULL
);

CREATE INDEX idx_unban_user ON unban_requests(user_id);
CREATE INDEX idx_unban_status ON unban_requests(status);
CREATE INDEX idx_unban_created ON unban_requests(created_at DESC);

-- Create comment reports table
CREATE TABLE IF NOT EXISTS comment_reports (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    comment_id BIGINT NOT NULL,
    user_id BIGINT NOT NULL,
    reason VARCHAR(255),
    CONSTRAINT fk_reports_comment FOREIGN KEY (comment_id) REFERENCES comments(id) ON DELETE CASCADE,
    CONSTRAINT fk_reports_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    UNIQUE (comment_id, user_id)
);

CREATE INDEX idx_comment_reports_comment ON comment_reports(comment_id);
CREATE INDEX idx_comment_reports_user ON comment_reports(user_id);

-- Create comment reactions table
CREATE TABLE IF NOT EXISTS comment_reactions (
    id BIGSERIAL PRIMARY KEY,
    created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
    comment_id BIGINT NOT NULL,
    user_id BIGINT NOT NULL,
    type VARCHAR(24) NOT NULL,
    CONSTRAINT fk_reactions_comment FOREIGN KEY (comment_id) REFERENCES comments(id) ON DELETE CASCADE,
    CONSTRAINT fk_reactions_user FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
    UNIQUE (comment_id, user_id)
);

CREATE INDEX idx_comment_reactions_comment ON comment_reactions(comment_id);
CREATE INDEX idx_comment_reactions_user ON comment_reactions(user_id);
CREATE INDEX idx_comment_reactions_type ON comment_reactions(type);