"""Migration wizard skeleton.

Per-feature migration logic (account.asset -> fusion.asset, etc.) is added
by each fusion sub-module that replaces an Enterprise feature, by extending
this wizard via _inherit.

Phase 0 ships the wizard with no migrations registered. Phase 1 will add
the bank-rec verification check. Phase 6 will add asset migration, etc.
"""

from odoo import _, api, fields, models

from ..models.ir_module_module import GUARDED_MODULES


class FusionMigrationWizard(models.TransientModel):
    _name = "fusion.migration.wizard"
    _description = "Migrate from Odoo Enterprise to Fusion Accounting"

    enterprise_modules_detected = fields.Char(
        compute='_compute_detected',
        string="Enterprise Modules Detected",
    )
    notes = fields.Text(default=lambda self: self._default_notes())

    def _default_notes(self):
        return _(
            "This wizard migrates data from Odoo Enterprise accounting modules "
            "to Fusion Accounting tables. Run before uninstalling Enterprise. "
            "After a successful run, each migrated module is marked complete "
            "and the Enterprise uninstall safety guard will allow uninstall.\n\n"
            "Phase 0 of the roadmap ships this wizard as a shell. As Phase 1, "
            "Phase 5, Phase 6, etc. ship, each adds its own migration step here."
        )

    @api.depends_context('uid')
    def _compute_detected(self):
        Mod = self.env['ir.module.module'].sudo()
        installed = Mod.search([
            ('name', 'in', list(GUARDED_MODULES)),
            ('state', '=', 'installed'),
        ])
        for w in self:
            w.enterprise_modules_detected = ', '.join(installed.mapped('name')) or _("None")

    def action_run_migration(self):
        """Stub: Phase 0 has no migrations to run.

        Sub-modules extend this method to perform their per-module migration,
        then set the corresponding fusion_accounting.migration.<name>.completed
        config param to True.
        """
        return {
            'type': 'ir.actions.client',
            'tag': 'display_notification',
            'params': {
                'type': 'info',
                'title': _("Nothing to migrate (yet)"),
                'message': _(
                    "Phase 0 ships the migration framework but no per-feature "
                    "migrations are registered yet. Each fusion sub-module that "
                    "replaces an Enterprise feature (Phase 1+) will register its "
                    "own migration step here."
                ),
            },
        }