from app.db.database import get_connection
from app.db.migrations import run_migrations


SUCCESS_STATUSES = ("ok", "success", "succeeded", "done", "deployed", "completed")
FAILED_STATUSES = ("failed", "failure", "error", "cancelled", "canceled")
RUNNING_STATUSES = ("running", "pending", "queued", "in_progress", "starting")


def get_apps():
    run_migrations()
    con = get_connection()

    rows = con.execute(
        """
        SELECT
            a.id,
            a.name,
            a.language,
            a.version,
            a.status,
            COALESCE(a.memory, '') AS memory,
            COALESCE(a.cpus, '') AS cpus,
            a.updated_at,
            (
                SELECT d.status
                FROM deployments d
                WHERE d.app_id = a.id
                ORDER BY d.id DESC
                LIMIT 1
            ) AS last_deploy_status,
            (
                SELECT d.started_at
                FROM deployments d
                WHERE d.app_id = a.id
                ORDER BY d.id DESC
                LIMIT 1
            ) AS last_deploy_started_at
        FROM apps a
        ORDER BY a.id
        """
    ).fetchall()

    con.close()
    return [dict(row) for row in rows]


def get_app(app_id: str):
    run_migrations()
    con = get_connection()

    row = con.execute(
        """
        SELECT
            id,
            name,
            language,
            version,
            status,
            memory,
            cpus,
            updated_at,
            description,
            owner,
            template,
            runtime,
            repository_url,
            repository_name,
            default_branch,
            domain,
            health_url,
            container_port,
            COALESCE(is_public, 0) AS is_public,
            COALESCE(is_enabled, 1) AS is_enabled
        FROM apps
        WHERE id = ?
        """,
        (app_id,),
    ).fetchone()

    con.close()
    return dict(row) if row else None


def get_app_templates(create_enabled: bool = False):
    run_migrations()
    con = get_connection()

    create_filter = "AND create_enabled = 1" if create_enabled else ""
    rows = con.execute(
        f"""
        SELECT
            id,
            name,
            runtime,
            language,
            description,
            default_port,
            default_health_path,
            create_script,
            deploy_script,
            COALESCE(is_enabled, 1) AS is_enabled,
            COALESCE(create_enabled, 0) AS create_enabled
        FROM app_templates
        WHERE COALESCE(is_enabled, 1) = 1
        {create_filter}
        ORDER BY name
        """
    ).fetchall()

    con.close()
    return [dict(row) for row in rows]


def get_app_template(template_id: str, create_enabled: bool = False):
    run_migrations()
    con = get_connection()

    create_filter = "AND COALESCE(create_enabled, 0) = 1" if create_enabled else ""
    row = con.execute(
        f"""
        SELECT
            id,
            name,
            runtime,
            language,
            description,
            default_port,
            default_health_path,
            create_script,
            deploy_script,
            COALESCE(is_enabled, 1) AS is_enabled,
            COALESCE(create_enabled, 0) AS create_enabled
        FROM app_templates
        WHERE id = ?
          AND COALESCE(is_enabled, 1) = 1
          {create_filter}
        """,
        (template_id,),
    ).fetchone()

    con.close()
    return dict(row) if row else None


def update_app_template_metadata(app_id: str, metadata: dict):
    run_migrations()
    con = get_connection()

    con.execute(
        """
        UPDATE apps
        SET name = ?,
            template = ?,
            runtime = ?,
            language = ?,
            health_url = ?,
            container_port = ?,
            updated_at = CURRENT_TIMESTAMP
        WHERE id = ?
        """,
        (
            metadata.get("name") or None,
            metadata.get("template") or None,
            metadata.get("runtime") or None,
            metadata.get("language") or None,
            metadata.get("health_url") or None,
            metadata.get("container_port"),
            app_id,
        ),
    )

    con.commit()
    con.close()


def upsert_created_app(app_id: str, metadata: dict):
    run_migrations()
    con = get_connection()

    values = (
        metadata.get("name") or app_id,
        metadata.get("language") or None,
        metadata.get("version") or "1.0.0",
        metadata.get("status") or "created",
        metadata.get("memory") or None,
        metadata.get("cpus") or None,
        metadata.get("description") or None,
        metadata.get("owner") or None,
        metadata.get("template") or None,
        metadata.get("runtime") or None,
        metadata.get("repository_url") or None,
        metadata.get("repository_name") or app_id,
        metadata.get("default_branch") or "main",
        metadata.get("health_url") or None,
        metadata.get("container_port"),
        1 if metadata.get("is_public") else 0,
        1 if metadata.get("is_enabled") else 0,
    )

    try:
        cur = con.execute(
            """
            UPDATE apps
            SET name = ?,
                language = ?,
                version = ?,
                status = ?,
                memory = ?,
                cpus = ?,
                description = ?,
                owner = ?,
                template = ?,
                runtime = ?,
                repository_url = ?,
                repository_name = ?,
                default_branch = ?,
                health_url = ?,
                container_port = ?,
                is_public = ?,
                is_enabled = ?,
                updated_at = CURRENT_TIMESTAMP
            WHERE id = ?
            """,
            (*values, app_id),
        )

        if cur.rowcount == 0:
            con.execute(
                """
                INSERT INTO apps (
                    id,
                    name,
                    language,
                    version,
                    status,
                    memory,
                    cpus,
                    updated_at,
                    description,
                    owner,
                    template,
                    runtime,
                    repository_url,
                    repository_name,
                    default_branch,
                    health_url,
                    container_port,
                    is_public,
                    is_enabled
                )
                VALUES (?, ?, ?, ?, ?, ?, ?, CURRENT_TIMESTAMP, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
                """,
                (
                    app_id,
                    values[0],
                    values[1],
                    values[2],
                    values[3],
                    values[4],
                    values[5],
                    values[6],
                    values[7],
                    values[8],
                    values[9],
                    values[10],
                    values[11],
                    values[12],
                    values[13],
                    values[14],
                    values[15],
                    values[16],
                ),
            )

        con.commit()
    except Exception:
        con.rollback()
        raise
    finally:
        con.close()


def update_app_metadata(app_id: str, metadata: dict):
    run_migrations()
    con = get_connection()

    con.execute(
        """
        UPDATE apps
        SET name = ?,
            description = ?,
            owner = ?,
            template = ?,
            runtime = ?,
            repository_url = ?,
            repository_name = ?,
            default_branch = ?,
            domain = ?,
            health_url = ?,
            container_port = ?,
            is_public = ?,
            is_enabled = ?,
            updated_at = CURRENT_TIMESTAMP
        WHERE id = ?
        """,
        (
            metadata.get("name") or None,
            metadata.get("description") or None,
            metadata.get("owner") or None,
            metadata.get("template") or None,
            metadata.get("runtime") or None,
            metadata.get("repository_url") or None,
            metadata.get("repository_name") or None,
            metadata.get("default_branch") or None,
            metadata.get("domain") or None,
            metadata.get("health_url") or None,
            metadata.get("container_port"),
            1 if metadata.get("is_public") else 0,
            1 if metadata.get("is_enabled") else 0,
            app_id,
        ),
    )

    con.commit()
    con.close()


def get_app_variables(app_id: str):
    run_migrations()
    con = get_connection()

    rows = con.execute(
        """
        SELECT id, app_id, "key", value, COALESCE(is_secret, 0) AS is_secret
        FROM app_variables
        WHERE app_id = ?
        ORDER BY "key"
        """,
        (app_id,),
    ).fetchall()

    con.close()
    return [dict(row) for row in rows]


def create_app_variable(app_id: str, key: str, value: str, is_secret: bool):
    run_migrations()
    con = get_connection()

    con.execute(
        """
        INSERT INTO app_variables (app_id, "key", value, is_secret, created_at, updated_at)
        VALUES (?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
        """,
        (app_id, key, value, 1 if is_secret else 0),
    )

    con.commit()
    con.close()


def update_app_variable(variable_id: int, app_id: str, key: str, value: str | None, is_secret: bool):
    run_migrations()
    con = get_connection()

    if value is None:
        con.execute(
            """
            UPDATE app_variables
            SET "key" = ?,
                is_secret = ?,
                updated_at = CURRENT_TIMESTAMP
            WHERE id = ? AND app_id = ?
            """,
            (key, 1 if is_secret else 0, variable_id, app_id),
        )
    else:
        con.execute(
            """
            UPDATE app_variables
            SET "key" = ?,
                value = ?,
                is_secret = ?,
                updated_at = CURRENT_TIMESTAMP
            WHERE id = ? AND app_id = ?
            """,
            (key, value, 1 if is_secret else 0, variable_id, app_id),
        )

    con.commit()
    con.close()


def delete_app_variable(variable_id: int, app_id: str):
    run_migrations()
    con = get_connection()

    con.execute(
        """
        DELETE FROM app_variables
        WHERE id = ? AND app_id = ?
        """,
        (variable_id, app_id),
    )

    con.commit()
    con.close()


def update_app_resources(app_id: str, memory: str, cpus: str):
    run_migrations()
    con = get_connection()

    con.execute(
        """
        UPDATE apps
        SET memory = ?,
            cpus = ?,
            updated_at = CURRENT_TIMESTAMP
        WHERE id = ?
        """,
        (
            memory or None,
            cpus or None,
            app_id,
        ),
    )

    con.commit()
    con.close()


def build_deployment_filters(
    status: str | None = None,
    app_id: str | None = None,
    source: str | None = None,
):
    filters = []
    params = []

    if status:
        normalized_status = status.strip().lower()
        if normalized_status == "success":
            filters.append(f"LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in SUCCESS_STATUSES)})")
            params.extend(SUCCESS_STATUSES)
        elif normalized_status == "failed":
            filters.append(f"LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in FAILED_STATUSES)})")
            params.extend(FAILED_STATUSES)
        elif normalized_status == "running":
            filters.append(f"LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in RUNNING_STATUSES)})")
            params.extend(RUNNING_STATUSES)
        else:
            filters.append("LOWER(status) = LOWER(?)")
            params.append(status)

    if app_id:
        filters.append("app_id = ?")
        params.append(app_id)

    if source:
        filters.append("trigger_source = ?")
        params.append(source)

    where = f"WHERE {' AND '.join(filters)}" if filters else ""
    return where, params


def get_deployments(
    limit: int = 20,
    offset: int = 0,
    status: str | None = None,
    app_id: str | None = None,
    source: str | None = None,
):
    con = get_connection()
    where, params = build_deployment_filters(status=status, app_id=app_id, source=source)

    rows = con.execute(
        f"""
        SELECT
            id,
            app_id,
            kind,
            status,
            started_at,
            finished_at,
            returncode,
            trigger_source,
            triggered_by_username,
            triggered_by_display_name
        FROM deployments
        {where}
        ORDER BY
            CASE
                WHEN LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in RUNNING_STATUSES)}) THEN 0
                ELSE 1
            END,
            id DESC
        LIMIT ?
        OFFSET ?
        """,
        (*params, *RUNNING_STATUSES, limit, offset),
    ).fetchall()

    con.close()
    return [dict(row) for row in rows]


def count_deployments(
    status: str | None = None,
    app_id: str | None = None,
    source: str | None = None,
):
    con = get_connection()
    where, params = build_deployment_filters(status=status, app_id=app_id, source=source)

    row = con.execute(
        f"""
        SELECT COUNT(*) AS count
        FROM deployments
        {where}
        """,
        params,
    ).fetchone()

    con.close()
    return row["count"] if row else 0


def get_deployment_filter_options():
    con = get_connection()

    apps = con.execute(
        """
        SELECT DISTINCT app_id
        FROM deployments
        WHERE app_id IS NOT NULL AND app_id != ''
        ORDER BY app_id
        """
    ).fetchall()
    sources = con.execute(
        """
        SELECT DISTINCT trigger_source
        FROM deployments
        WHERE trigger_source IS NOT NULL AND trigger_source != ''
        ORDER BY trigger_source
        """
    ).fetchall()

    con.close()
    return {
        "apps": [row["app_id"] for row in apps],
        "sources": [row["trigger_source"] for row in sources],
    }


def get_deployment_stats():
    con = get_connection()

    row = con.execute(
        f"""
        SELECT
            COUNT(*) AS total,
            SUM(CASE WHEN LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in FAILED_STATUSES)}) THEN 1 ELSE 0 END) AS failed,
            SUM(CASE WHEN LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in RUNNING_STATUSES)}) THEN 1 ELSE 0 END) AS running,
            SUM(CASE WHEN LOWER(COALESCE(status, '')) IN ({','.join('?' for _ in SUCCESS_STATUSES)}) THEN 1 ELSE 0 END) AS success
        FROM deployments
        """,
        (*FAILED_STATUSES, *RUNNING_STATUSES, *SUCCESS_STATUSES),
    ).fetchone()

    con.close()
    stats = dict(row) if row else {"total": 0, "failed": 0, "running": 0, "success": 0}
    total = stats.get("total") or 0
    success = stats.get("success") or 0
    stats["success_rate"] = round((success / total) * 100, 1) if total else 0
    return stats


def get_app_deployments(app_id: str, limit: int = 10):
    con = get_connection()

    rows = con.execute(
        """
        SELECT
            id,
            app_id,
            kind,
            status,
            started_at,
            finished_at,
            returncode,
            trigger_source,
            triggered_by_username,
            triggered_by_display_name
        FROM deployments
        WHERE app_id = ?
        ORDER BY id DESC
        LIMIT ?
        """,
        (app_id, limit),
    ).fetchall()

    con.close()
    return [dict(row) for row in rows]


def get_deployment(deployment_id: int):
    con = get_connection()

    row = con.execute(
        """
        SELECT
            id,
            app_id,
            kind,
            status,
            started_at,
            finished_at,
            returncode,
            stdout,
            stderr,
            trigger_source,
            triggered_by_username,
            triggered_by_display_name,
            commit_author,
            pusher
        FROM deployments
        WHERE id = ?
        """,
        (deployment_id,),
    ).fetchone()

    con.close()
    return dict(row) if row else None