package handlers

import (
	"context"

	"github.com/jackc/pgx/v5/pgxpool"
)

// EnsurePostsSchema creates posts, post_attachments, and post_tags tables.
func EnsurePostsSchema(ctx context.Context, pool *pgxpool.Pool) error {
	_, err := pool.Exec(ctx, `
		CREATE TABLE IF NOT EXISTS posts (
			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
			category_id INT NOT NULL REFERENCES categories(id),
			language TEXT NOT NULL DEFAULT 'zh',
			text_zh TEXT,
			text_en TEXT,
			text_ja TEXT,
			text_ko TEXT,
			text_vi TEXT,
			text_id TEXT,
			text_ms TEXT,
			is_public BOOLEAN NOT NULL DEFAULT TRUE,
			is_recommended BOOLEAN NOT NULL DEFAULT FALSE,
			sort_order INT NOT NULL DEFAULT 0,
			status TEXT NOT NULL DEFAULT 'draft',
			published_at TIMESTAMPTZ,
			created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
			updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
			view_count INT NOT NULL DEFAULT 0,
			download_count INT NOT NULL DEFAULT 0
		);
		CREATE INDEX IF NOT EXISTS idx_posts_category ON posts(category_id);
		CREATE INDEX IF NOT EXISTS idx_posts_status_public ON posts(status, is_public);
		CREATE INDEX IF NOT EXISTS idx_posts_published ON posts(published_at DESC NULLS LAST, id DESC);
		CREATE INDEX IF NOT EXISTS idx_posts_recommended ON posts(is_recommended) WHERE is_recommended = TRUE;

		CREATE TABLE IF NOT EXISTS post_attachments (
			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
			post_id UUID NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
			kind TEXT NOT NULL,
			url TEXT NOT NULL,
			mime TEXT NOT NULL DEFAULT 'application/octet-stream',
			filename TEXT NOT NULL DEFAULT '',
			size_bytes BIGINT NOT NULL DEFAULT 0,
			width INT,
			height INT,
			duration_sec INT,
			poster_url TEXT,
			thumbnail_url TEXT,
			sort_order INT NOT NULL DEFAULT 0
		);
		CREATE INDEX IF NOT EXISTS idx_post_attachments_post ON post_attachments(post_id, sort_order ASC);

		CREATE TABLE IF NOT EXISTS post_tags (
			post_id UUID NOT NULL REFERENCES posts(id) ON DELETE CASCADE,
			tag_id INT NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
			PRIMARY KEY (post_id, tag_id)
		)`)
	return err
}