<?php

declare(strict_types=1);

use Core\Database;
use Core\Migration;

return new class extends Migration
{
    public function up(Database $database): void
    {
        $database->execute('DROP TABLE IF EXISTS project_members');
        $database->execute('DROP TABLE IF EXISTS tasks');
        $database->execute('DROP TABLE IF EXISTS activity_log');
        $database->execute('DROP TABLE IF EXISTS projects');

        $database->execute(
            'CREATE TABLE IF NOT EXISTS projects (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                code VARCHAR(32) NOT NULL UNIQUE,
                name VARCHAR(120) NOT NULL,
                client_name VARCHAR(120) NOT NULL,
                description TEXT NOT NULL,
                status VARCHAR(20) NOT NULL DEFAULT "planned",
                start_date DATE NOT NULL,
                due_date DATE NULL,
                budget_cents INTEGER NOT NULL DEFAULT 0,
                owner_name VARCHAR(120) NOT NULL,
                color_token VARCHAR(32) NOT NULL DEFAULT "teal",
                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP
            )'
        );

        $database->execute(
            'CREATE TABLE IF NOT EXISTS project_members (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                project_id INTEGER NOT NULL,
                full_name VARCHAR(120) NOT NULL,
                role VARCHAR(80) NOT NULL,
                allocation_percent INTEGER NOT NULL DEFAULT 0,
                is_primary INTEGER NOT NULL DEFAULT 0,
                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE
            )'
        );

        $database->execute(
            'CREATE TABLE IF NOT EXISTS tasks (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                project_id INTEGER NOT NULL,
                title VARCHAR(140) NOT NULL,
                description TEXT NOT NULL,
                status VARCHAR(20) NOT NULL DEFAULT "backlog",
                priority VARCHAR(20) NOT NULL DEFAULT "normal",
                assignee VARCHAR(100) NOT NULL,
                estimate_hours REAL NULL,
                due_date DATE NULL,
                position INTEGER NOT NULL DEFAULT 0,
                completed_at DATETIME NULL,
                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE
            )'
        );

        $database->execute(
            'CREATE TABLE IF NOT EXISTS activity_log (
                id INTEGER PRIMARY KEY AUTOINCREMENT,
                project_id INTEGER NULL,
                task_id INTEGER NULL,
                event_type VARCHAR(40) NOT NULL,
                headline VARCHAR(180) NOT NULL,
                detail TEXT NOT NULL,
                created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
                FOREIGN KEY (project_id) REFERENCES projects(id) ON DELETE CASCADE,
                FOREIGN KEY (task_id) REFERENCES tasks(id) ON DELETE CASCADE
            )'
        );

        $database->execute('CREATE INDEX IF NOT EXISTS idx_tasks_project_status ON tasks (project_id, status, due_date)');
        $database->execute('CREATE INDEX IF NOT EXISTS idx_activity_project_created ON activity_log (project_id, created_at DESC)');
        $database->execute('CREATE INDEX IF NOT EXISTS idx_project_members_project_primary ON project_members (project_id, is_primary DESC)');
    }

    public function down(Database $database): void
    {
        $database->execute('DROP TABLE IF EXISTS activity_log');
        $database->execute('DROP TABLE IF EXISTS tasks');
        $database->execute('DROP TABLE IF EXISTS project_members');
        $database->execute('DROP TABLE IF EXISTS projects');
    }
};